NABORS INDUSTRIES INC
10-K405, 1996-12-30
DRILLING OIL & GAS WELLS
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549


                                   FORM 10-K
                 ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE FISCAL YEAR ENDED SEPTEMBER 30, 1996         COMMISSION FILE NO.: 1-9245


                            NABORS INDUSTRIES, INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

          DELAWARE                                 93-0711613
(JURISDICTION OF INCORPORATION)         (I.R.S. EMPLOYER IDENTIFICATION NO.)



    515 WEST GREENS ROAD, SUITE 1200
           HOUSTON, TEXAS                              77067
   (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)          (ZIP CODE)

                                (281) 874-0035
               (REGISTRANT'S TELEPHONE NUMBER, INCLUDE AREA CODE)


          SECURITIES REGISTERED PURSUANT TO SECTION 12(B) OF THE ACT:

                                                          NAME OF EACH
          TITLE OF EACH CLASS                    EXCHANGE ON WHICH REGISTERED

   COMMON STOCK, $.10 PAR VALUE, PER SHARE       AMERICAN STOCK EXCHANGE, INC.

         INDICATE BY CHECK MARK WHETHER REGISTRANT (1) HAS FILED ALL REPORTS
REQUIRED TO BE FILED BY SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF
1934 DURING THE PRECEDING 12 MONTHS, AND (2) HAS BEEN SUBJECT TO SUCH FILING
REQUIREMENTS FOR THE PAST 90 DAYS.    YES   X        NO 
                                         ------        ------

     INDICATE BY CHECK MARK IF DISCLOSURE OF DELINQUENT FILERS PURSUANT TO ITEM
405 OF REGULATION S-K IS NOT CONTAINED HEREIN, AND WILL NOT BE CONTAINED, TO
THE BEST OF REGISTRANT'S KNOWLEDGE, IN DEFINITIVE PROXY OR INFORMATION
STATEMENTS INCORPORATED BY REFERENCE IN PART III OF THIS FORM 10-K OR ANY
AMENDMENT TO THIS FORM 10-K. [ X ]

         THE AGGREGATE MARKET VALUE ON NOVEMBER 30, 1996 OF VOTING STOCK HELD
BY NON-AFFILIATES OF THE REGISTRANT WAS APPROXIMATELY $1,432 MILLION.

         THE NUMBER OF SHARES OF COMMON STOCK OUTSTANDING AS OF NOVEMBER 30,
1996 WAS 91,374,156.


                      DOCUMENTS INCORPORATED BY REFERENCE
                        (TO THE EXTENT INDICATED HEREIN)

 SPECIFIED PORTIONS OF THE 1996 ANNUAL REPORT TO STOCKHOLDERS (PARTS I AND II)
    SPECIFIED PORTIONS OF THE NOTICE OF ANNUAL MEETING OF STOCKHOLDERS AND
                          PROXY STATEMENT (PART III)







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                                        PART I

ITEM 1.  BUSINESS

OVERVIEW

Nabors Industries, Inc. (collectively with its subsidiaries, "Nabors" or the
"Company") is the largest land drilling contractor in the world. The Company,
which was incorporated in Delaware in 1978, has principally been engaged in
oil, gas and geothermal land drilling operations in Alaska, the US Lower 48
states and Canada, and internationally in the Middle East, the Far East, the
Commonwealth of Independent States ("CIS"), North and West Africa and South and
Central America. Nabors, through its subsidiaries, including primarily
Sundowner Offshore Services, Inc. ("Sundowner"), provides offshore drilling,
well servicing and workover services in the Gulf of Mexico, Alaska's Cook Inlet
and several international markets. Another Nabors subsidiary, J. W. Gibson Well
Service Company, provides well servicing and workover services primarily in the
Rocky Mountains and mid-continent region of the United States. The Company also
provides oilfield management, engineering, transportation, construction,
maintenance, well logging and other support services in selected domestic and
international markets. In addition, the Company's Canrig subsidiary 
manufacturers top drives for a broad range of drilling rig applications.

BUSINESS STRATEGY

Since the current management group began operating the Company in 1987, the
Company's business philosophy has been to establish and maintain a conservative
and flexible financial posture, to build a diverse portfolio of market positions
to mitigate risk and create potential for growth, to forge long-term
relationships with customers, to build a cadre of talented and experienced
employees, to grow and remain profitable in any market environment and to
position the business for the future by maintaining flexibility. This
philosophy has been implemented primarily through strategic acquisitions and
internal growth in existing and new markets. Nabors also has advanced this
philosophy by entering into strategic alliances with customers and by providing
integrated drilling, engineering and other oilfield services responsive to
customer needs.

EXPANSION BY ACQUISITIONS

Since 1988, through acquisitions of other drilling companies, asset purchases
and internal expansion, the Company has grown from a land drilling business
centered principally in Canada and Alaska, to an international company
operating on land and offshore in many of the major oil, gas and geothermal
markets in the world. In 1988, Nabors rig fleet consisted of 44 land drilling
rigs. The active Nabors-owned rig fleet consists of 329 land drilling rigs, 34
offshore rigs and 70 land workover and well servicing rigs. The significant
acquisitions by the Company are described below.

In November 1988, the Company acquired the Westburne Group of Companies, an
international drilling contractor with land drilling operations in the Middle
East, North Africa, Southeast Asia, the Far East, Australia and Canada and
offshore operations in the UK North Sea. This acquisition  provided the Company
with its initial entry into drilling markets outside North America.

During 1990, the Company acquired Loffland Brothers Company, a leader in the
domestic and international drilling industry for over 80 years, and Henley
Drilling Company, a subsidiary of Hunt Oil Company. These acquisitions added 74
rigs, significantly expanded the Company's presence in the North Sea, Middle
East and Canada and added major new markets, including the US Lower 48 states,
Venezuela, the Gulf of Mexico and Yemen.



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In 1993, the Company acquired substantially all of the assets of Grace Drilling
Company, which was then the largest land driller in the United States, and the
assets of Alaska United Drilling, which operates in Alaska. These acquisitions
added 170 drilling rigs to the Company's fleet and significantly expanded the
capabilities of the Company in the US Lower 48 states, strengthened its
operations in Alaska markets and provided a supply of component parts used to
reduce capital expenditure costs.

In 1994, the Company acquired Sundowner, a leader in the offshore well servicing
and workover markets. The Sundowner fleet purchased in the transaction included
15 platform rigs plus one rig under construction, five jackup workover rigs and
three workover and plug and abandonment barge rigs. The addition of Sundowner
has allowed the Company to expand into what the Company's management believes
will be significant markets in the coming years. Also in 1994, the Company
acquired 16 drilling rigs from MND Drilling, a subsidiary of Mitchell Energy
Development Corp., and eight mobile, medium-depth rigs from various other
sources.

In 1995, the Company purchased all of the stock of Delta Drilling Company
("Delta"). In acquiring Delta, which operated primarily in Texas and Louisiana,
Nabors added 30 land drilling rigs to its fleet.

In 1996, the Company acquired all of the stock of Exeter Drilling Company and
its subsidiary J.W. Gibson Well Service Company, and certain other assets from
other sources. In these acquisitions, the Company added 49 drilling rigs and
78 workover and well servicing rigs (10 of which were leased from third
parties). These acquisitions increased the Company's available rigs primarily 
in the Rocky Mountains, the mid-continent region, Texas and Louisiana, and 
marked the Company's entry into the land workover and well service business.

After the end of the fiscal year, in November 1996, the Company sold all of 
its UK North Sea operations to a subsidiary of Abbot Holdings Ltd. for 
approximately US$36 million, plus the value of working capital, in cash as 
well as four-year warrants to acquire 10.8 million shares of the stock of 
Abbot Holdings Ltd. at 83 pence per share. During December 1996, the Company 
purchased 47 land drilling rigs from Noble Drilling Corporation for $60 
million in cash. The rig fleet consists of 19 operating rigs and 28 stacked 
rigs located in the United States and Canada. Also in December 1996, the 
Company entered into an agreement with Adcor-Nicklos Drilling Company 
("Adcor"), pursuant to which all of the stock of Adcor will be exchanged for 
approximately 3.4 million shares of Nabors common stock. The transaction is 
expected to close in January 1997. Assets to be acquired in the Adcor 
transaction will include 30 active and six stacked rigs located in the United 
States, drill pipe, spare drilling equipment, yards, vehicles and other 
support equipment.

ALLIANCES, INTEGRATED DRILLING SERVICES AND ENGINEERING.

An increasing number of customers have been seeking to reduce costs and improve
efficiency in their exploration and development drilling programs by
establishing continuing relationships, or alliances, with a smaller number of
preferred drilling contractors. These alliances can result in long-term work
and increased profitability for drilling contractors that are selected as
partners in the alliance. The Company has been selected by certain operators as
alliance partner in Alaska, the US Lower 48 states and Canada. The Company
intends to continue to pursue opportunities for alliances with customers in all
of the markets in which it operates.

The Company's ability to provide drilling-related services and management of
drill site activities for its customers is also a factor in the Company's
growth. Many major oil and gas companies are reducing the number of services
they provide and the number of service contractors at a drill site, and are
requiring that the contractors remaining provide such drilling-related services
and management.



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Contractors that have been able to adapt to this expanded role have the
potential to achieve enhanced financial returns in consideration for providing
these additional services. As with alliances, the Company intends to continue to
seek opportunities to capitalize on its ability to provide a wide range of
services to its customers in addition to drilling.

Another factor in the growth of the Company has been its ability to provide
innovative, quality engineering and technical support for its drilling and
oilfield support operations. The Company provides engineering services to all
of its subsidiaries and to its worldwide customers from its Houston-based
engineering groups.

MARKETS

ALASKA

Nabors is the leading drilling contractor in Alaska, where it owns eight Arctic
land drilling and well service rigs on the North Slope and three land and one
platform drilling rig in the Cook Inlet area of South Central Alaska. All of
the North Slope rigs have been specifically designed to operate in severe
arctic conditions and employ wheel mounted systems designed by Nabors to permit
efficient movement of the rigs from well to well and over ice or gravel roads.
Three of these rigs are also self-propelled to further facilitate movement and
maneuverability. The well service rigs have been designed with spacing
capability that allows them to move between reduced well spacing on drilling
pads without disrupting production. In addition, Nabors' arctic rigs
incorporate environmental protection features such as dry mud and fluid
containment systems.

As a result of a restructuring in the relationship of the operators of the
Prudhoe Bay Unit, the largest North Slope oilfield, the operators began to
develop stronger, long-term relationships with fewer service companies. Early
in 1992, Nabors was selected as the first service company to work in alliance 
with these operators. This alliance has resulted in significant cost reductions
for the customers and has increased Nabors' market share in this major market. 
In fiscal 1994, the scope of the alliance was expanded to include the Milne 
Point Unit.

The Company has a 50% interest in Peak Oilfield Services ("Peak"), a general
partnership with Cook Inlet Region, Inc., a leading Alaskan native
corporation. Peak provides heavy equipment to move drilling rigs, water, other
fluids and construction materials. Peak also provides construction and
maintenance for roads, pads, facilities, equipment, drill sites and pipelines.
Peak is a partner to a five-year alliance contract to provide maintenance
services for the Prudhoe Bay Unit. Peak also has been chosen to coordinate and
supply drilling support transportation services to the unit. Peak has expanded
its business by the acquisition of Alaska Interstate Construction, an Alaska
based company with significant experience in Arctic road and site construction.
In addition, Peak has expanded its operations through the formation of Peak USA
Energy Services Ltd, a Texas limited partnership, which is providing trucking
and oilfield services in Texas and Oklahoma.

US LOWER 48 STATES AND CANADA

The Company currently markets 241 land rigs in the US Lower 48 states market.
Eighty-eight of the rigs are diesel electric rigs controlled by a computerized
SCR unit ("SCR rigs"), and 138 are capable of drilling to 15,000 feet or deeper.
In addition to oil and gas drilling, Nabors is also active in West Coast
geothermal drilling. Through its J. W. Gibson Well Service Company subsidiary,
the Company markets 75 workover and well servicing rigs in the Rocky Mountains
and the mid-continent region.


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The Company also has a fleet of 28 rigs in Canada. Fifteen rigs in the fleet are
diesel electric SCR rigs, seven are equipped with top drives and all of the rigs
in Nabors' Canadian fleet are capable of performing exploratory and development
drilling under arctic and sub-arctic conditions.

INTERNATIONAL DRILLING

South and Central America.  The Company currently operates 17 land drilling rigs
in Venezuela and provides crews for two rigs under labor contracts. Eight of
these rigs were redeployed from other areas of the world during since fiscal
year 1994 in connection with long term contracts with US-based operators and
Corpoven and Maraven (affiliates of PDVSA, the government owned oil company. The
Company also operates one rig in Colombia under a contract with Ecopetrol, the
national oil company of Colombia, and has one rig that recently completed
operations in Costa Rica and is expected to be redeployed to another country.

The Middle East.  In the Middle East, Nabors operates 18 land rigs and one
jackup rig. Of the 18 land rigs, seven are in Yemen, nine are in Saudi Arabia
and two are in other countries. Since 1994, there has been a substantial
downturn in drilling activities in Yemen and as of the end of the 1996 fiscal
year, only six drilling rigs are in operation.

The Company has a fleet of equipment in Yemen, including trucks, cranes,
bulldozers and other construction and transportation equipment. Because the 
Company's logistics service operations in Yemen have had disappointing 
operating results, the operations in that country have been substantially
reduced.

The CIS.  In the CIS, the Company owns four rigs, two of which were relocated
from Russia to Kazakhstan during fiscal 1996 and a third rig which is located 
in the Republic of Georgia. A fourth rig was deployed to Sakhalin Island in the
CIS in mid-1995 and is currently drilling there for a US-based operator.  In 
addition, the Company is a participant in a joint venture that operates two 
rigs in Kazakhstan.

Far East.  In the Far East, the Company owns three deep rated, diesel electric
SCR land rigs in Japan. In addition, the Company has mobilized one rig from 
Yemen to begin a contract for a US-based operator in Laos.

Africa. The Company has two rigs in Africa, one in Gabon and one in Ethiopia.

OFFSHORE DRILLING, WORKOVER AND WELL SERVICING

With the acquisition of Sundowner in October of 1994, the Company expanded its
existing offshore drilling business in the Gulf of Mexico and entered the
offshore workover and well servicing business in the US Gulf of Mexico, the 
CIS, Europe and West Africa. Sundowner operates a fleet of 30 rigs including
14 Sundowner and Super Sundowner platform rigs, three Minimum Area
Self-Erecting (MASE(TM)) platform drilling rigs, four API platform drilling 
rigs, one land rig converted to an offshore platform drilling rig, five jackup
workover rigs and three inland barge rigs (two of which currently are
inoperable). In addition, other subsidiaries own four offshore rigs, of which
one is a platform drilling rig located in Alaska, one is a jackup rig located in
the Middle East and two are barges chartered to a third party. Six of the Super
Sundowner rigs, two of the Sundowner rigs and all of the platform drilling rigs
(including the MASE(TM) rigs) are equipped with portable top drive units to
enhance drilling efficiency in sidetrack and horizontal drilling operations. A
subsidiary of Sundowner also provides plug and abandonment services on the Gulf
Coast. Sundowner has developed a new generation of innovative (MASE(TM))
platform drilling rigs, certain elements of which are patented, that results in
reduced drilling and workover costs. One of these MASE(TM) rigs has been
operating in Trinidad and two are operating in the Gulf of Mexico. The resources
of the Company, combined with the Sundowner technology, are expected to
facilitate expansion into new markets throughout the world.

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Additional information regarding markets in which the Company operates can be
found on page 5 of the Nabors Industries, Inc. 1996 Annual Report to
Stockholders ("1996 Annual Report") and is incorporated herein by reference.
For information regarding rig utilization in the various markets in which the
Company operates, see the discussion referenced under Item 7.

ENGINEERING DEVELOPMENTS

In recent years, Nabors has been increasingly involved in engineering research
and development with respect to the commercialization of new drilling
technology. Through its acquisition of Sundowner, the Company owns the rights
to proprietary designs and innovations which, when applied to the Company rigs,
can substantially reduce the costs of drilling and working on offshore wells.
These proprietary designs are being applied to a new generation of modular
MASE(TM) rigs specifically for drilling. Three of these MASE(TM) rigs are
presently operational.

The Company's Canrig subsidiary manufactures and markets electric top drives
that are designed with enhanced safety and drilling efficiency features. This
top drive design includes fixed and portable units that are being utilized in a
broad range of land and offshore applications. The Company also developed an
automated slant rig, capable of drilling shallow or slim hole wells.

The Company, in a joint project with a major oil company, designed and
constructed a slim hole drilling rig, utilizing an advanced drilling process
known as a Stratigraphic High Speed Advanced Drilling System. This small
footprint, slim hole rig, which the Company now owns, is designed to enable
operators to significantly cut the cost of exploration projects in remote and
difficult drilling regions. The Company has built a second slim hole rig using
the same technology. Both slim hole rigs are now operational in Venezuela.

Company engineers have obtained new patents during the past year and have
patent applications pending for new technology associated with drilling
activities.

CUSTOMERS

The Company's customers include major oil and gas companies, foreign national
oil and gas companies and independent oil and gas companies. No single customer
provides as much as 10% of consolidated revenues.

INDUSTRY CONDITIONS, COMPETITION AND SEASONALITY

The Company's revenues and earnings are affected directly by the demand for
contract drilling and related oilfield services. Demand is a function of the
level of oil and gas exploration and development activity. The level of such
activity is impacted by many factors over which the Company has no control,
including among others, the market prices of oil and gas, the stability or
volatility of such prices, levels of production, activities of the Organization
of Petroleum Exporting Countries and other oil and gas producers, governmental
regulations, the level of worldwide economic activity, the development of
alternate energy sources, and the short and long-term effect of worldwide
energy conservation measures. Substantial uncertainty exists as to the future
level of oil and gas exploration and production drilling activity.

The contract drilling, workover and well servicing industry is a highly
fragmented, intensely competitive and cyclical business. Since 1982, the
contract drilling business has been severely impacted by the decline and
continued instability in the prices of oil and natural gas. Though these
depressed economic conditions have resulted in a consolidation of the number of
competitors and the reduction of the number of rigs available, the supply of
available rigs, particularly in the domestic land markets, still exceeds the
demand for those rigs. This excess capacity in the industry has resulted in
substantial



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competition. Competition for services in a particular market is
based on price, location, type and condition of available equipment and quality
of service. In the offshore drilling well servicing and workover business, the
technical capability of specialized equipment as well as technical and
engineering expertise is also important. A number of large and small
contractors provide competition for drilling contracts in all areas of the
Company's business. Although no single drilling competitor operates in all such
areas, certain competitors are present in more than one of those areas.

Within the last year, the offshore market has shown a substantial increase in
price, particularly for more sophisticated semi-submersible and jackup rigs.
The high demand and tight supply of these types of sophisticated rigs is also
resulting in increased prices for the type of platform and workover jackup rigs
operated by the Company. Within the last several months, prices for land
drilling rigs have started to increase, particularly with respect to SCR rigs
and rigs which are capable of drilling in excess of 15,000 feet.

Seasonality is not a significant factor with respect to the operations of the
Company.

DRILLING AND SERVICE CONTRACTS

The Company's drilling rigs are employed under individual contracts which
extend either over a stated period of time or the time required to drill
a well or a number of wells. Drilling contracts are generally obtained through
competitive bidding though some may be obtained by negotiation. Contracts are
generally subject to termination by the customer on short notice, but can be
firm for a number of wells or years.

Drilling contracts may provide for compensation on a daywork, footage, or
turnkey basis. Most of the Company's contracts are on a daywork basis. A
daywork contract provides for a basic rate per day when drilling (the
"Dayrate") and for lower rates when the rig is moving, or when drilling
operations are interrupted or restricted by equipment breakdowns, actions of
the customer or adverse weather conditions or other conditions beyond the
control of the Company. In addition, the daywork contracts typically provide
for a lump sum fee for the mobilization and demobilization of the drilling rig.
The Dayrate depends on market and competitive conditions, the nature of the
operations to be performed, the duration of the work, the equipment and
services to be provided, the geographic area involved and other variables.

The Company is also a party to turnkey and footage contracts in certain areas
of the United States. In a turnkey contract, the Company undertakes to drill a
well to a specified depth for a fixed price. In a footage contract, the Company
undertakes to drill a well to a specified depth at a fixed price per foot of
hole. In both turnkey and footage contracts, the Company must bear the cost of
performing the drilling services until the well has been drilled, and
accordingly, such contracts require significant cash commitments by the
Company. In both the turnkey and footage contracts, the Company generally
agrees to furnish services such as testing, coring and casing the hole and
other services which are not normally provided by a drilling contractor working
under a daywork contract. In both situations, compensation is earned upon
completion of the well to the specified depth. If the well is not completed to
the specified depth, the Company may not receive the fixed turnkey or footage
price. In addition, footage and turnkey contracts generally involve a higher
degree of risk to the Company than daywork contracts because the Company
assumes greater risks and bears the cost of unanticipated downhole problems and
price escalation.

Onshore transportation and support services are provided through long-term
contracts or on a short-term demand basis. Long-term contracts may either be
negotiated or awarded by competitive bidding. Whether provided on a long-term
or short-term basis, equipment and labor are usually billed separately

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at specified hourly rates. These hourly rates vary depending upon numerous
factors, including types of equipment and labor, and duration of the work.

OPERATING RISKS AND INSURANCE

The Company's operations are subject to many hazards inherent in the drilling,
workover and well servicing industries including blowouts, cratering, explosions
and fires, any of which could result in personal injury or death, damage to or
destruction of equipment and facilities, suspension of operations, environmental
damage to surrounding areas and damage to the property of others. The Company's
offshore operations are also subject to the hazards of marine operations
including capsizing, grounding, collision, damage from heavy weather or sea
conditions and unsound bottom conditions. In addition, the Company's
international operations are subject to risks of war, civil disturbances or
other political events. (See also "International Operations".) To the extent
that such risks are not transferred to customers by contract or indemnification
agreements, the Company seeks protection through insurance which the Company's
management considers to be adequate. However, there is no assurance that such
insurance or indemnification agreements will be adequate to protect the Company
against liability from all of the consequences of the hazards described above.
The occurrence of an event not fully insured or indemnified against, or the
failure of a customer to meet its indemnification obligations could result in
substantial losses to the Company. In addition, there can be no assurance that
insurance will be available, or, even if available, that it will be adequate or
that insurance premiums or other costs will not rise significantly in the
future.

INTERNATIONAL OPERATIONS

A significant portion of the Company's business is derived from international
markets, including major operations in Canada, the Middle East, the North Sea
and South and Central America, as well as other operations in the CIS, the Far
East and Africa. Such operations may be subject to various risks, including
risk of war and civil disturbances and governmental activities that may limit
or disrupt markets, restrict the movement of funds or result in the deprivation
of contract rights or the taking of property without fair compensation. In
certain countries, such operations may be subject to the additional risk of
fluctuating currency values and exchange controls. (See also "Operating Risks
and Insurance".)

In the international markets in which the Company operates, it is subject to
various laws and regulations with respect to the operation and taxation of its
business and the import and export of its equipment from country to country,
the imposition, application and interpretation of which can be uncertain.

GOVERNMENTAL MATTERS

Governments at various levels in the United States and in various other
countries in which the Company operates have enacted legislation or adopted
regulations affecting the drilling and servicing of oil and gas wells,
controlling the discharge and disposal of wastes from drilling and other
operations and providing for the protection of the environment in general. In
recent years, laws and regulations protecting the environment have generally
become more stringent and have sought to impose greater liability on a larger
number of potentially responsible parties. While the Company believes it is
generally in compliance with applicable laws and regulations related to
environmental controls, the Company could nonetheless be subject to cleanup
costs or costs associated with environmental laws and regulations which could
be substantial and have a material adverse effect on the Company.

EMPLOYEES

At September 30, 1996, the Company employed approximately 8,650 persons. In
addition, Peak employed 864 persons.

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GEOGRAPHIC DISTRIBUTION OF EARNINGS AND ASSETS

The revenues, operating income (loss) and identifiable assets of each
geographic area for the three years ended September 30, 1996, can be found in
Note 14 of the Notes to Consolidated Financial Statements on page 38 of the
1996 Annual Report, which is incorporated herein by reference.


ITEM 2.  PROPERTIES

A table of information regarding the Company's rig fleet can be found on page
12 ("Rig Fleet") of the 1996 Annual Report and is incorporated herein by
reference.

Many of the international drilling rigs in the Company's fleet are supported by
mobile camps which house the drilling crews and a significant inventory of
spare parts and supplies. In addition, the Company owns various trucks,
forklifts, cranes, earth moving and other construction and transportation
equipment which are used to support the drilling and logistics operations.

The Company and its subsidiaries lease or own executive and administrative
office space in Houston, Texas (headquarters); Denver, Colorado; Anchorage,
Alaska; Houma, Arcadia and Lafayette, Louisiana; Bakersfield, California;
Englewood, Colorado; Magnolia, Texas; Calgary and Nisku, Alberta, Canada; 
Sana'a, Yemen; Dubai, U.A.E.; Dhahran, Saudi Arabia and Maracaibo, Anaco and 
Barinas, Venezuela. The Company owns or leases a number of facilities used in 
support of operations in each of its geographic markets.

Additional information about Properties can be found in Notes 1 and 4 of the 
Notes to Consolidated Financial Statements on pages 28, 29 and 32 of the 1996 
Annual Report and is incorporated herein by reference.

The Company's management believes that its equipment and facilities are
adequate to support its current level of operations as well as an expansion of
drilling operations in those geographical areas where the Company may choose to
expand.


ITEM 3.  LEGAL PROCEEDINGS

Information with respect to legal proceedings can be found in Note 11 of the
Notes to Consolidated Financial Statements under the caption "Contingencies" 
on page 37 of the 1996 Annual Report and is incorporated herein by reference.

ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

There were no matters submitted to a vote of security holders of the Company
during the quarter ended September 30, 1996.


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                                        PART II

ITEM 5.  MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS

MARKET

The information called for by this item can be found on the inside back cover
("Price of Common Stock") of the 1996 Annual Report and is incorporated herein
by reference.

The Company has neither declared nor paid any cash dividends on its common
stock since 1982. Certain debt instruments restrict the Company's ability to
pay dividends. Under the terms of these instruments, Nabors may pay dividends
to the extent that cumulative dividends plus certain other payments since March
31, 1989 do not exceed 50% of Nabors' cumulative net income since March 31,
1989 plus the proceeds of any offering of equity securities of Nabors that are
not redeemable at the option of the holder of the securities. As of September
30, 1996 retained earnings available for dividends totaled approximately
$178 million. The Company does not intend to pay any cash dividends on its
common stock in the foreseeable future.

ITEM 6.  SELECTED FINANCIAL DATA

The information called for by this item can be found on page 16 ("Selected
Financial Data") of the 1996 Annual Report and is incorporated herein by
reference.

ITEM 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
         OF OPERATIONS

The information called for by this item can be found on pages 17 through 22 
("Management's Discussion and Analysis of Financial Condition and Results
of Operations") of the 1996 Annual Report and is incorporated herein by
reference.

ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

The consolidated financial statements, together with the report thereon of
Coopers & Lybrand L.L.P. dated November 25, 1996 (except as to the information
presented in Notes 9 and 15, for which the date is December 20, 1996) appear on
pages 23 through 38 of the 1996 Annual Report and are incorporated herein by
reference. With the exception of the aforementioned information and the
information expressly incorporated into Items 1, 2, 3, 6, 7 and 8 hereof, the
1996 Annual Report is not deemed to be filed as part of this report.

ITEM 9.  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
         FINANCIAL DISCLOSURE

None.

                                    PART III

ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

The information called for by this item will be contained in the Nabors
Industries, Inc. definitive Proxy Statement to be distributed in connection
with its Annual Meeting (the "Proxy Statement") under the captions "Election of
Directors" and "Executive Officers" and is incorporated herein by reference.


                                       10
<PAGE>   11
Section 16(a) of the Securities Exchange Act of 1934 requires the Company's
directors and executive officers, and persons who own more than ten percent of
a registered class of the Company's equity securities, to file with the
Securities and Exchange Commission and the American Stock Exchange initial
reports of ownership and reports of changes in ownership of Common Stock and
other equity securities of the Company. Officers, directors and greater than
ten-percent shareholders are required by SEC regulation to furnish the Company
with all Section 16(a) forms which they file.

To the Company's knowledge, based solely on review of the copies of such
reports furnished to the Company and written representations that no other
reports were required during the two fiscal years ended September 30,1996, all
Section 16(a) filing requirements applicable to its officers, directors and
greater than ten percent beneficial owners were complied with.

ITEM 11.  EXECUTIVE COMPENSATION

The information called for by this item will be contained in the Proxy
Statement to be distributed in connection with its Annual Meeting under the
caption "Remuneration of Management" and is incorporated herein by reference;
except for information not deemed to be "soliciting material" or "filed" with
the SEC including the Report of the Compensation Committee on Executive
Compensation and the Five Year Stock Performance Graph which is not deemed to
be incorporated by reference.

ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

The information called for by this item will be contained in the Proxy
Statement to be distributed in connection with its Annual Meeting under the
caption "Share Ownership of Management and Principal Shareholders" and is
incorporated herein by reference.

ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

The information called for by this item will be contained in the Proxy
Statement to be distributed in connection with its Annual Meeting, under the
caption "Business Relationships" and "Compensation Committee Interlocks and
Insider Participation" and is incorporated herein by reference.


                                    PART IV

ITEM 14.          EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM
                  8-K

(a)      The following documents are filed as part of this report:

         (1)      Financial Statements of Nabors Industries, Inc. and
                  Subsidiaries which are listed in Part II, Item 8 and are
                  incorporated herein by reference from the Company's 1996
                  Annual Report to Stockholders from the respective page
                  numbers indicated:                                 
 
                                                                       Page No.
                  Report of Independent Accountants                       23

                  Consolidated Balance Sheets                             24

                  Consolidated Statements of Income                       25

                  Consolidated Statements of Changes in
                    Stockholders' Equity                                  26

                  Consolidated Statements of Cash Flows                   27

                  Notes to Consolidated Financial Statements              28




                                       11
<PAGE>   12



         (2)      Financial Statement Schedules 

                  Supplemental schedules are omitted because of the absence 
                  of the conditions under which they are required or because 
                  the required information is included in the financial 
                  statements or notes thereto.

         (3)      Exhibits

                  Exhibit          Description

                  3(1)             Restated Certificate of Incorporation and
                                   By-Laws of the Registrant dated May 12,
                                   1988
                  
                  3.1(2)           Certificate of Amendment of the Restated
                                   Certificate of Incorporation of the
                                   Registrant dated May 8, 1990
                  
                  3.2(3)           Certificate of Amendment of the Restated
                                   Certificate of Incorporation of the
                                   Registrant dated April 12, 1991
                  
                  3.3(7)           Certificate of Amendment of the Restated
                                   Certificate of Incorporation of the
                                   Registrant dated March 11, 1994
                  
                  3.4(2)           Amendment to the Restated By-Laws of the
                                   Corporation
                  
                  4.1(11)          Indenture for Subordinated Debt Securities
                                   dated May 28, 1996 between Marine Midland
                                   Bank, Trustee and Nabors Industries, Inc. 
                                   in connection with $172,500,000 aggregarate 
                                   principal amount of 5% Convertible 
                                   Subordinated Notes due 2006 (the "Notes")

                  4.2(11)          Supplemental Indenture dated May 28, 1996
                                   between Marine Midland Bank, Trustee and 
                                   Nabors Industries, Inc. in connection with 
                                   the Notes
                  
                  4.3              Registration Rights Agreement dated as of 
                                   April 30, 1996 between Nabors Industries, 
                                   Inc. and Occidental Oil and Gas Corporation

                  10.1(7)          1993 Stock Option Plan for Non-Employee
                                   Directors
                  
                  10.2(10)         1994 Executive Officers Stock Plan
                  
                  10.3(10)         1996 Employee Stock Plan
                  
                  10.4             1994 Executive Stock Option Agreement
                                   effective December 28, 1994 between Nabors
                                   Industries, Inc. and Eugene M. Isenberg
                  
                  10.5             1994 Executive Stock Option Agreement
                                   effective December 28, 1994 between Nabors
                                   Industries, Inc. and Anthony G. Petrello
                  
                  10.6             1994 Executive Stock Option Agreement
                                   effective December 28, 1994 between Nabors
                                   Industries, Inc. and Richard A. Stratton
                  
                  10.7(8)          Employment Agreement effective October 1,
                                   1994 between Nabors Industries, Inc. and
                                   Eugene M. Isenberg

                  10.8(8)          Employment Agreement effective October 1,
                                   1994 between Nabors Industries, Inc. and 
                                   Anthony G. Petrello




                                       12
<PAGE>   13
                  10.9(9)          Amendment to Employment Contract dated as
                                   of December 28, 1994 between Nabors
                                   Industries, Inc. and Richard A. Stratton
                  
                  10.10(4)         Note Purchase Agreement between Nabors
                                   Industries, Inc. and John Hancock Mutual
                                   Life Insurance Company dated October 1,
                                   1992
                  
                  10.11(5)         Agreement and Plan of Reorganization dated
                                   as of August 26, 1993 between Equity
                                   Strategies Fund, Inc. and Nabors
                                   Industries, Inc.
                  
                  10.12(6)         Agreement and Plan of Merger dated August
                                   12, 1994 by and Among Nabors Industries,
                                   Inc., Nabors Acquisition Corp. and
                                   Sundowner Offshore Services, Inc.
                  
                  10.13(9)         Stock Purchase Agreement entered into as of
                                   December 22, 1994 by and between Nabors
                                   Drilling USA, Inc. and Gordon P. Getty
                  
                  10.14            Stock Purchase Agreement dated as of March
                                   8, 1996 between Nabors Industries, Inc. and
                                   Occidental Oil and Gas Corporation as
                                   amended by Amendment No. 1 to Stock Purchase
                                   Agreement dated as of April 23, 1996
                  
                  10.15            Share Purchase Agreement dates as of
                                   October 18, 1996 by and among Abbot Group
                                   plc, Nabors Industries, Inc., and KCA
                                   Drilling Group Limited
                  
                  10.16            Asset Purchase Agreement between Noble
                                   Drilling Corporation, Noble Properties, 
                                   Inc., Noble Drilling (Canada) Ltd. and 
                                   Nabors Industries, Inc. dated November 15, 
                                   1996

                  10.17(11)        Underwriting Agreement dated May 21, 1996
                                   by and among Nabors Industries, Inc. and
                                   Salomon Brothers, Inc., Goldman, Sachs &
                                   Co., Merrill, Lynch, Pierce, Fenner &
                                   Smith, Incorporated and Simmons and
                                   Company, International as representatives
                                   of the underwriters named therein in
                                   connection with the offering of the Notes

                  12               Computation of Ratios of Earnings to Fixed
                                   Charges

                  13               1996 Annual Report to Stockholders
                  
                  21               List of Subsidiaries of Nabors Industries,
                                   Inc.
                  
                  23               Consent of Independent Accountants




                                       13
<PAGE>   14

                   27              Financial Data Schedule

- -------------------------

                   (1)      Incorporated by Reference to the Exhibits to Form
                            10-K, File No. 1-7773, filed with the Commission on
                            January 11, 1988.               
        
                   (2)      Incorporated by Reference to the Exhibits to Form
                            10-K, File No. 1-9245, filed with the Commission on
                            December 21, 1990.              
        
                   (3)      Incorporated by Reference to the Exhibits to Form
                            10-K, File No. 1-9245, filed with the Commission on
                            December 30, 1991.              
        
                   (4)      Incorporated by Reference to the Exhibits to Form
                            10-K, File No. 1-9245, filed with the Commission on
                            December 29, 1992.              
        
                   (5)      Incorporated by Reference to the Exhibits to Form
                            10-K, File No. 1-9245, filed with the Commission on
                            December 29, 1993.              
        
                   (6)      Incorporated by Reference to the Exhibits to Form
                            S-4, File No. 33-84188, filed with the
                            Commission on September 20, 1994.           
        
                   (7)      Incorporated by Reference to Form S-8, Registration
                            No. 33-87322, filed with the Commission on December
                            29, 1994.
        
                   (8)      Incorporated by Reference to Form 10-Q for Quarter
                            ended June 30, 1995, File No. 1-9245, filed
                            with the Commission on August 14, 1995. 
        
                   (9)      Incorporated by Reference to Form 10-K, File No.
                            1-9245 filed with the Commission on December
                            27, 1995.                               
        
                   (10)     Incorporated by Reference to Form S-8, Registration
                            No. 333-11313, filed with the Commission on
                            September 3, 1996.                          
        
                   (11)     Incorporated by Reference to Form 8-K, File No.
                            1-9245, filed with the Commission on May 28,
                            1996.                                      
        

(b)       Reports on Form 8-K:

          None



                                       14
<PAGE>   15



                                   SIGNATURES




Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange
Act of 1934, the Registrant has duly caused this report to be signed on its
behalf by the undersigned, thereunto duly authorized on December 30, 1996.




                                     NABORS INDUSTRIES, INC.



                                     By:  /s/Anthony G. Petrello
                                          ----------------------
                                          Anthony G. Petrello
                                          President





                                       15
<PAGE>   16





Pursuant to the requirements of the Securities Exchange Act of 1934, this
report has been signed below by the following persons on behalf of the
Registrant and in the capacities and on the dates indicated.


<TABLE>
<CAPTION>
Signature                        Title                        Date
- ---------                        -----                        ----

<S>                        <C>                          <C>
/s/ Eugene M. Isenberg      Chairman and                December 30, 1996
- ----------------------      Chief Executive Officer
Eugene M. Isenberg                                 



/s/ Richard A. Stratton     Vice Chairman               December 30, 1996
- ----------------------                                                   
Richard A. Stratton



/s/ Anthony G. Petrello     President and               December 30, 1996
- ----------------------      Chief Operating Officer
Anthony G. Petrello



/s/ Martin J. Whitman       Director                    December 30, 1996
- ----------------------      
Martin J. Whitman



/s/ Myron M. Sheinfeld      Director                    December 30, 1996
- ----------------------      
Myron M. Sheinfeld



/s/ Jack Wexler             Director                    December 30, 1996
- ----------------------      
Jack Wexler



/s/ Gary T. Hurford         Director                    December 30, 1996
- ----------------------      
Gary T. Hurford



/s/ Hans Schmidt            Director                    December 30, 1996
- ----------------------      
Hans Schmidt
</TABLE>




                                       16
<PAGE>   17




<TABLE>
<CAPTION>
Signature                        Title                     Date
- ---------                        -----                     ----

<S>                         <C>                         <C>
/s/ Michael W. Dundy        Vice President and          December 30, 1996
- ----------------------      General Counsel
Michael W. Dundy            



/s/ Daniel McLachlin        Vice President              December 30, 1996
- ----------------------      
Daniel McLachlin



/s/ Bruce P. Koch           Vice President - Finance    December 30, 1996
- ----------------------      
Bruce P. Koch
</TABLE>




                                       17
<PAGE>   18
                               INDEX TO EXHIBITS

                  Exhibit          Description

                  3(1)             Restated Certificate of Incorporation and
                                   By-Laws of the Registrant dated May 12,
                                   1988
                  
                  3.1(2)           Certificate of Amendment of the Restated
                                   Certificate of Incorporation of the
                                   Registrant dated May 8, 1990
                  
                  3.2(3)           Certificate of Amendment of the Restated
                                   Certificate of Incorporation of the
                                   Registrant dated April 12, 1991
                  
                  3.3(7)           Certificate of Amendment of the Restated
                                   Certificate of Incorporation of the
                                   Registrant dated March 11, 1994
                  
                  3.4(2)           Amendment to the Restated By-Laws of the
                                   Corporation
                  
                  4.1(11)          Indenture for Subordinated Debt Securities
                                   dated May 28, 1996 between Marine Midland
                                   Bank, Trustee and Nabors Industries, Inc. 
                                   in connection with $172,500,000 aggregate 
                                   principal amount of 5% Convertible 
                                   Subordinated Notes due 2006 (the "Notes")

                  4.2(11)          Supplemental Indenture dated May 28, 1996
                                   between Marine Midland Bank, Trustee and 
                                   Nabors Industries, Inc. in connection with 
                                   the Notes
                  
                  4.3              Registration Rights Agreement dated as of 
                                   April 30, 1996 between Nabors Industries, 
                                   Inc. and Occidental Oil and Gas Corporation

                  10.1(7)          1993 Stock Option Plan for Non-Employee
                                   Directors
                  
                  10.2(10)         1994 Executive Officers Stock Plan
                  
                  10.3(10)         1996 Employee Stock Plan
                  
                  10.4             1994 Executive Stock Option Agreement
                                   effective December 28, 1994 between Nabors
                                   Industries, Inc. and Eugene M. Isenberg
                  
                  10.5             1994 Executive Stock Option Agreement
                                   effective December 28, 1994 between Nabors
                                   Industries, Inc. and Anthony G. Petrello
                  
                  10.6             1994 Executive Stock Option Agreement
                                   effective December 28, 1994 between Nabors
                                   Industries, Inc. and Richard A. Stratton
                  
                  10.7(8)          Employment Agreement effective October 1,
                                   1994 between Nabors Industries, Inc. and
                                   Eugene M. Isenberg

                  10.8(8)          Employment Agreement effective October 1,
                                   1994 between Nabors Industries, Inc. and 
                                   Anthony G. Petrello




<PAGE>   19
                  10.9(9)          Amendment to Employment Contract dated as
                                   of December 28, 1994 between Nabors
                                   Industries, Inc. and Richard A. Stratton
                  
                  10.10(4)         Note Purchase Agreement between Nabors
                                   Industries, Inc. and John Hancock Mutual
                                   Life Insurance Company dated October 1,
                                   1992
                  
                  10.11(5)         Agreement and Plan of Reorganization dated
                                   as of August 26, 1993 between Equity
                                   Strategies Fund, Inc. and Nabors
                                   Industries, Inc.
                  
                  10.12(6)         Agreement and Plan of Merger dated August
                                   12, 1994 by and Among Nabors Industries,
                                   Inc., Nabors Acquisition Corp. and
                                   Sundowner Offshore Services, Inc.
                  
                  10.13(9)         Stock Purchase Agreement entered into as of
                                   December 22, 1994 by and between Nabors
                                   Drilling USA, Inc. and Gordon P. Getty
                  
                  10.14            Stock Purchase Agreement dated as of March
                                   8, 1996 between Nabors Industries, Inc. and
                                   Occidental Oil and Gas Corporation as
                                   amended by Amendment No. 1 to Stock Purchase
                                   Agreement dated as of April 23, 1996
                  
                  10.15            Share Purchase Agreement dates as of
                                   October 18, 1996 by and among Abbot Group
                                   plc, Nabors Industries, Inc., and KCA
                                   Drilling Group Limited
                  
                  10.16            Asset Purchase Agreement between Noble
                                   Drilling Corporation, Noble Properties, 
                                   Inc., Noble Drilling (Canada) Ltd. and 
                                   Nabors Industries, Inc. dated November 15, 
                                   1996

                  10.17(11)        Underwriting Agreement dated May 21, 1996
                                   by and among Nabors Industries, Inc. and
                                   Salomon Brothers, Inc., Goldman, Sachs &
                                   Co., Merrill, Lynch, Pierce, Fenner &
                                   Smith, Incorporated and Simmons and
                                   Company, International as representatives
                                   of the underwriters named therein in
                                   connection with the offering of the Notes

                  12               Computation of Ratios of Earnings to Fixed
                                   Charges

                  13               1996 Annual Report to Stockholders
                  
                  21               List of Subsidiaries of Nabors Industries,
                                   Inc.
                  
                  23               Consent of Independent Accountants




<PAGE>   20

                   27              Financial Data Schedule

- -------------------------

                   (1)      Incorporated by Reference to the Exhibits to Form
                            10-K, File No. 1-7773, filed with the Commission on
                            January 11, 1988.               
        
                   (2)      Incorporated by Reference to the Exhibits to Form
                            10-K, File No. 1-9245, filed with the Commission on
                            December 21, 1990.              
        
                   (3)      Incorporated by Reference to the Exhibits to Form
                            10-K, File No. 1-9245, filed with the Commission on
                            December 30, 1991.              
        
                   (4)      Incorporated by Reference to the Exhibits to Form
                            10-K, File No. 1-9245, filed with the Commission on
                            December 29, 1992.              
        
                   (5)      Incorporated by Reference to the Exhibits to Form
                            10-K, File No. 1-9245, filed with the Commission on
                            December 29, 1993.              
        
                   (6)      Incorporated by Reference to the Exhibits to Form
                            S-4, File No. 33-84188, filed with the
                            Commission on September 20, 1994.           
        
                   (7)      Incorporated by Reference to Form S-8, Registration 
                            No. 33-87322, filed with the Commission on 
                            December 29, 1994.                                 
        
                   (8)      Incorporated by Reference to Form 10-Q for Quarter
                            ended June 30, 1995, File No. 1-9245, filed
                            with the Commission on August 14, 1995. 
        
                   (9)      Incorporated by Reference to Form 10-K, File No.
                            1-9245 filed with the Commission on December
                            27, 1995.                               
        
                   (10)     Incorporated by Reference to Form S-8, Registration 
                            No. 333-11313, filed with the Commission on
                            September 3, 1996.                          
        
                   (11)     Incorporated by Reference to Form 8-K, File No.
                            1-9245, filed with the Commission on May 28,
                            1996.                                      
        




<PAGE>   1





                                                                     EXHIBIT 4.3

                         REGISTRATION RIGHTS AGREEMENT


         This Registration Rights Agreement (this "Agreement") is entered into
as of April 30, 1996, by and between Nabors Industries, Inc., a Delaware
corporation ("Nabors"), and Occidental Oil and Gas Corporation, a California
corporation ("Oxy").

         WHEREAS, Nabors and Oxy are parties to the Stock Purchase Agreement,
and

         WHEREAS, as contemplated by the Stock Purchase Agreement, Nabors has
elected to issue to Oxy the Registrable Securities; and

         WHEREAS, Nabors desires to grant to Oxy the registration rights
provided for herein;

         NOW, THEREFORE, in consideration of the foregoing and for other good
and valuable consideration, Nabors and Oxy hereby agree as follows:

         1.1     DEMAND REGISTRATION RIGHTS.

                 (a)      Holder shall have the right, exercisable prior to the
Termination Date, unless extended pursuant to this Section 1.1, on one (1)
occasion by written notice to Nabors (the "Registration Notice"), to require
Nabors to effect a registration under the Securities Act of the Registrable
Securities, and Nabors will cause, as expeditiously as practicable, the
registration under the Securities Act of all (but not less than all) of the
Registrable Securities. In connection therewith, Nabors shall be obligated to
prepare and file a registration statement promptly upon receipt of any such
Registration Notice and shall be further obligated to cause such registration
statement to be declared effective under the Securities Act and the rules and
regulations promulgated thereunder as soon as practicable after the filing date
thereof; provided that Nabors may defer for a period not longer than 60 days
the registration requested pursuant to this Section 1.1 if a majority of
Nabors' board of directors in good faith shall resolve that expeditious
registration, as otherwise required by this Section 1.1, would be materially
disadvantageous to Nabors. The period during which the rights granted under
this Section 1.1 may be exercised by Holder shall be extended by one day beyond
the Termination Date for each day that pursuant to this Section 1.1 Nabors
postpones effecting a registration, requires Holder to refrain from disposing
of Registrable Securities pursuant to the registration statement or otherwise
requires Holder to refrain from disposing of Equity Securities of Nabors.
Holder may demand, and Nabors shall be required to effect, only one (1) such
registration of Registrable Securities owned by Holder, and such obligation
shall be deemed satisfied (i) when one underwritten registration and offering
shall have been completed with respect to Registrable Securities which Holder
requests be registered pursuant to this Section 1.1 (provided, that such
obligation shall nonetheless be deemed to have been satisfied if the closing
conditions in the underwriting or purchase agreement entered into in connection
with such underwritten offering are not satisfied due to some act or omission
by Holder) or (ii) when one registration not involving an underwriter shall
become effective pursuant to a request of Holder made pursuant to this Section
1.1, provided that a registration not involving an underwriter shall not be
deemed to have been effected for purposes of this Section 1.1 if the
registration statement relating to such registration does not remain effective
for a period of at least 120 days (or such shorter period ending on the date
Holder completes its distribution of Registrable Securities as contemplated by
such registration statement) or if within 120 days after such registration
becomes effective (or such shorter period referred to above) such registration
is interfered with by any stop order, injunction or other order or requirement
of the Commission or
<PAGE>   2
other governmental agency or court for any reason and all the Registrable
Securities registered in connection therewith were not sold.

                 (b)      If Registrable Securities which Nabors has been
requested to register pursuant to this Section 1.1 are to be disposed of in an
underwritten public offering, Holder shall select three underwriters from the
list attached hereto as Annex A. Nabors will select the managing underwriter
from such three underwriters in connection with the offering. If the managing
underwriter shall advise Nabors in writing (with a copy to Holder) stating
that, in its opinion, the number of shares proposed to be included in such
registration exceeds the number which can be sold in such offering within the
price range acceptable to Holder (such opinion to state the approximate number
of shares which, in the judgment of the managing underwriter, may be included
in such offering without such effect), then Nabors will include in such
registration, to the extent of the number of securities which Nabors is so
advised can be sold in such offering (i) first, Registrable Securities owned by
Holder requested to be registered pursuant to this Section 1.1, and (ii)
second, all other securities of Nabors proposed to be included in such
registration.

         1.2     PIGGYBACK REGISTRATION RIGHTS. If Nabors at any time through
the Termination Date proposes (or if Nabors proposes on more than one occasion)
to register any of its Equity Securities under the Securities Act for sale, in
a manner which would permit registration of Registrable Securities owned by
Holder for sale to the public under the Securities Act, it will give written
notice to Holder of its intention to register any of its Equity Securities and,
upon the written request of Holder given within 30 days after the actual
receipt of any such notice, Nabors will cause all or any part of any
Registrable Securities then owned by Holder to be included in such registration
statement; provided, however, that Nabors may at any time withdraw or cease
proceeding with any such registration if it shall at the same time withdraw or
cease proceeding with the registration of such other securities originally
proposed to be registered. Notwithstanding anything in the foregoing to the
contrary,

                 (a)      if a registration pursuant to this Section 1.2
involves an underwritten offering, Nabors shall select the managing underwriter
for the offering and any additional investment bankers or manager to be used in
connection with the offering, and, if the managing underwriter shall advise
Nabors in writing (with a copy to Holder) that, in its opinion, the number of
shares proposed to be included in such registration is so great as would
adversely affect the offering, including the price at which the shares can be
sold, then Nabors will include in such registration, the maximum number of
securities which Nabors is so advised can be sold in such offering without the
adverse effect allocated as follows: (i) first, securities of Nabors that
Nabors proposes to issue and sell for its own account and securities for which
it has granted demand registration rights to Persons other than Holder, (ii)
second, Registrable Securities owned by Holder and requested to be registered
pursuant to this Section 1.2 and securities of Nabors held by other holders
granted similar piggyback or incidental registration rights by Nabors, pro rata
among Holder and such other holders on the basis of the total number of shares
of such securities requested to be registered by Holder and all such other
holders, and (iii) third, all other securities of Nabors proposed to be
included in such registration,

                 (b)      any such request of Holder for inclusion in a
registration involving an underwriter shall also include the agreement of
Holder to sell the applicable number of Registrable Securities only through the
underwriters and at the price and upon the terms fixed by the agreement among
Nabors and the underwriters or brokers for such transaction,
<PAGE>   3
                 (c)      Nabors shall not be required to include any
Registrable Securities owned by Holder in a registration statement on Form S-4
or S-8 (or any successor form) or a registration statement filed in connection
with an exchange offer or other offering of securities solely to the then
existing shareholders of Nabors, and

                 (d)      the procedures set forth in Section 1.3 (other than
those set forth in Section 1.3 (a), (b), (d) or (e)) shall apply to any
registration involving a Holder pursuant to the terms of this Section 1.2.

         1.3     REGISTRATION PROCEDURES. Registration under this Agreement
shall be on such appropriate registration form of the Commission as shall be
selected by Nabors and as shall permit the disposition of such Registrable
Securities. If and whenever Nabors proposes to effect the registration of any
Registrable Securities under the Securities Act as provided in Section 1.1,
Nabors will as expeditiously as possible:

                 (a)      promptly and in any event within 45 days of the
Registration Notice (subject to the proviso set forth in Section 1.1),
prepare and file with the Commission the requisite registration statement to
effect such registration and use its best efforts to cause such registration
statement to become effective;

                 (b)      prepare and file with the Commission such amendments
and supplements to such registration statement and the prospectus used in
connection therewith as may be necessary to keep such registration statement
effective and to comply with the provisions of the Securities Act with respect
to the disposition of all securities covered by such registration statement
until the earlier of (i) such time as all of the Registrable Securities have
been disposed of by Holder and (ii) 120 days after the effective date of such
registration statement, and shall immediately notify Holder when such
registration statement is no longer effective under the Securities Act;

                 (c)      furnish as soon as available to Holder and the
managing underwriter, if any, (i) such number of copies of such drafts and
final versions of such registration statement and of each such amendment and
supplement thereto (in each case including all exhibits), (ii) such number of
copies of such drafts and final versions of the prospectus contained in such
registration statement (including each preliminary prospectus and any summary
prospectus), (iii) such number of copies of any other prospectus filed under
Rule 424 under the Securities Act, in conformity with the requirements of the
Securities Act, and (iv) such number of copies of such other documents, as
Holder may reasonably request;

                 (d)      register or qualify the Registrable Securities and
other securities covered by such registration statement under such other
securities or blue sky laws of such U.S. jurisdictions as Holder shall
reasonably request, keep such registration or qualification in effect for so
long as such registration statement remains in effect, and take any other
action which may be reasonably necessary or advisable to enable Holder to
consummate the disposition in such jurisdictions of the Registrable Securities
owned by Holder, except that Nabors shall not for any such purpose be required
to qualify generally to do business as a foreign corporation in any
jurisdiction wherein it would not but for the requirements of this subdivision
(d) be obligated to be so qualified or to consent to general service of process
in any such jurisdiction;

                 (c)      only in the case of an underwritten offering, furnish
to Holder and the underwriters of Registrable Securities:
<PAGE>   4
                          (i)     an opinion of counsel for Nabors, dated the
                          effective date of such registration statement (and,
                          if such registration involves an underwritten public
                          offering, dated the date of the closing under the
                          underwriting agreement), reasonably satisfactory in
                          form and substance to the managing underwriter, and

                          (ii)    a "comfort" letter, dated the effective date
                          of such registration statement (and, if such
                          registration involves an underwritten public
                          offering, dated the date of the closing under the
                          underwriting agreement) signed by the independent
                          public accountants who have certified the Nabors'
                          financial statements included or incorporated by
                          reference in such registration statement and the
                          prospectus included therein and, in the case of the
                          accountants' letter, with respect to events
                          subsequent to the date of such financial statements,
                          as are customarily covered in accountants' letters
                          delivered to the underwriters in underwritten public
                          offerings of securities;

                 (f)      notify Holder, at any time when a prospectus relating
to Registrable Securities is required to be delivered under the Securities Act,
upon discovery that, or upon the happening of any event as a result of which,
the prospectus included in the registration statement, as then in effect,
includes an untrue statement of a material fact or omits to state any material
fact required to be stated therein or necessary to make the statements therein
not misleading in the light of the circumstances under which they were made,
and at the request of Holder promptly prepare and furnish to Holder a
reasonable number of copies of a supplement to or an amendment of such
prospectus as may be necessary so that, as thereafter delivered to purchasers
or prospective purchasers of such securities, such prospectus shall not include
an untrue statement of a material fact or omit to state a material fact
required to be stated therein or necessary to make the statements therein not
misleading in the light of the circumstances under which they were made;

                 (g)       otherwise comply with all applicable rules and
regulations of the Commission, and make available to its security holders, as
soon as reasonably practicable, an earnings statement covering the period of at
least twelve months, but not more than eighteen months, beginning with the
first full calendar month after the effective date of such registration
statement, which earnings statement shall satisfy (in accordance with Rule 158)
the provisions of Section 11(a) of the Securities Act, and furnish to Holder at
least five Business Days prior to the filing thereof a copy of any amendment or
supplement to such registration statement or prospectus, and shall not file any
thereof to which Holder shall have reasonably objected on the grounds that such
amendment or supplement does not comply in all material respects with the
requirements of the Securities Act or the rules or Regulations thereunder;

                 (h)      provide and cause to be maintained a transfer agent
and registrar for the Registrable Securities covered by such registration
statement from and after a date not later than the effective date of such
registration statement; and

                 (i)      cause all Registrable Securities covered by such
registration statement to be listed on a national securities exchange and on
each additional national securities exchange on which similar securities issued
by Nabors are then listed or the National Market System of the NASD, if the
listing of such Registrable Securities is then permitted under the rules of
such exchange or the National Market System of the NASD.
<PAGE>   5
In any registration of Registrable Securities pursuant to this Agreement,
Holder shall provide to Nabors all necessary information regarding Holder's
intended method of distribution. Nabors may require Holder to furnish Nabors
such additional information in respect of Holder or its Registrable Securities
which will be included in such registration statement as Nabors may reasonably
request in writing and as is required by applicable laws or regulations. Nabors
agrees to include in any such registration statement all information which
Holder shall reasonably request.

         1.4     UNDERWRITTEN OFFERINGS.

                 (a)      REQUESTED UNDERWRITTEN OFFERINGS. If requested by the
underwriters for any underwritten offering by Holder made pursuant to a
registration requested under Section 1.1, Nabors will use its reasonable
efforts to enter into a firm commitment underwriting agreement with such
underwriters and Holder for such offering, such agreement to be satisfactory in
substance and form to Holder and the underwriters and to contain such
representations and warranties by Nabors and such other terms as are
customarily contained in such agreements, including, without limitation,
indemnities to the effect and the extent provided in Section 1.7. Except as set
forth in this Agreement, Holder shall not be required to make any
representations or warranties to or agreements with Nabors or the underwriters
other than representations, warranties or agreements regarding Holder, Holder's
Registrable Securities and Holder's intended method of distribution and any
other representation required by law.

                 (b)      HOLDBACK AGREEMENTS. Holder agrees, if so required by
the managing underwriter, not to effect any public sale or distribution of any
Equity Securities of Nabors, during the seven days prior to the date on which
any underwritten registration pursuant to Section 1.1 or Section 1.2 has
become effective and the 120 days thereafter, except as part of such
underwritten registration.

         1.5     PREPARATION; REASONABLE INVESTIGATION. In connection with the
preparation and filing of each registration statement under the Securities Act
in which Registrable Securities are included pursuant to this Agreement, Nabors
will give Holder, its counsel, and the managing underwriter or underwriters (if
any) the opportunity (a) to review such registration statement, each prospectus
included therein or filed with the Commission, and each amendment thereof or
supplement thereto, and (b) to discuss the business of Nabors with its officers
and the independent public accountants who have certified its financial
statements.

         1.6     REGISTRATION EXPENSES. Nabors will, whether or not any
registration pursuant to this Agreement becomes effective, from time to time
promptly upon receipt of bills or invoices relating thereto, pay all expenses
incident to its performance of or compliance with this Agreement, including,
without limitation, all (a) registration, filing and listing fees, (b) fees and
expenses of compliance with securities or Blue Sky laws, (c) printing expenses
and messenger and delivery expenses, (d) fees and disbursements of counsel for
Nabors and Nabors' independent public accountants (including the expenses of
any audit and/or "comfort" letter) and other Persons retained by Nabors and (e)
any fees and disbursements of underwriters customarily borne by issuers or
sellers of securities (excluding underwriting commissions and discounts which
shall be borne by Holder).
<PAGE>   6
         1.7     INDEMNIFICATION.

                 (a)      Nabors will, and hereby does, indemnify and hold
harmless, to the extent permitted by applicable law, Holder, its officers and
directors, if any, and each Person, if any, who controls Holder within the
meaning of Section 15 of the Securities Act, and their respective successors,
against all losses, claims, damages, liabilities (or proceedings in respect
thereof) and expenses, including legal fees incurred in investigating or
defending any such loss, claim, damage or liability (under the Securities Act
or common law or otherwise), joint or several, arising out of or based upon any
untrue statement or alleged untrue statement of a material fact contained in
any registration statement or prospectus (and as amended or supplemented if
Nabors shall have furnished any amendments or supplements thereto) covering the
Registrable Securities or any preliminary prospectus or other document incident
thereto or arising out of or based upon any omission or alleged omission to
state therein a material fact required to be stated therein or necessary to
make the statements therein not misleading, except insofar as such losses,
claims, damages, liabilities (or proceedings in respect thereof) or expenses
arise out of or are based upon any untrue statement or alleged untrue statement
contained in or by any omission or alleged omission from information furnished
in writing to Nabors by Holder expressly for use therein. If the offering
pursuant to any registration statement provided for under this Agreement is
made through underwriters, no action or failure to act on the part of such
underwriters (whether or not any such underwriter is an Affiliate of Holder)
shall affect the obligations of Nabors to indemnify Holder or any other Person
pursuant to the preceding sentence. If the offering pursuant to any
registration statement provided for under this Agreement is made through
underwriters, Nabors agrees to enter into an underwriting agreement in
customary form, with customary indemnification provisions, with such
underwriters. Such indemnity shall remain in full force and effect regardless
of any investigation made by or on behalf of Holder, its officers, directors or
any Person, if any, who controls Holder as aforesaid, and shall survive the
transfer of such securities by Holder.

                 (b)       Holder will and hereby does indemnify, to the extent
permitted by applicable law, Nabors, its officers and directors and each
Person, if any, who controls Nabors within the meaning of Section 15 of the
Securities Act, and their respective successors, against any losses, claims,
damages, liabilities (or proceedings in respect thereof) and expenses
(including legal fees incurred in investigating or defending any such loss,
claim, damage or liability) arising out of or based upon any untrue statement
or alleged untrue statement of a material fact or any omission or alleged
omission of a material fact required to be stated in such registration
statement or prospectus or preliminary prospectus or any amendment thereof or
supplement thereto or necessary to make the statements therein not misleading,
but only to the extent that such untrue statement is contained in, or such
omission is from information so furnished in, writing by Holder expressly for
use therein, provided that Holder's obligations hereunder shall be limited to
an amount equal to the proceeds to Holder of the Registrable Securities sold
pursuant to such registration statement.

                 (c)       Any Person entitled to indemnification under the 
        provisions of this Section 1.7 shall (i) give prompt notice to the
indemnifying Person of any claim with respect to which its seeks
indemnification and (ii) unless in such indemnified Person's reasonable
judgment a conflict of interest between such indemnified and indemnifying
Persons may exist in respect to such claim, permit such indemnifying Person to
assume the defense of such claim, with counsel reasonably satisfactory to the
indemnified Person; and, if such defense is so assumed, such indemnifying
Person shall not enter into any settlement without the consent of the
indemnified Person if such settlement attributes liability to the indemnified
Person and such indemnified Person shall not be subject to any liability for
any settlement made without such consent (which shall not be unreasonably
withheld); and any underwriting agreement entered into with respect to any
<PAGE>   7
registration statement provided for under this Agreement shall so provide. In
the event that an indemnifying Person shall not be entitled, or elects not, to
assume the defense of a claim, such indemnifying Person shall not be obligated
to pay the fees and expenses of more than one counsel or firm of counsel for
all parties indemnified by such indemnifying Person in respect of such claim,
unless, in the reasonable judgment of any such indemnified Person, a conflict
of interest may exist between such indemnified Person and any other of such
indemnified Persons in respect of such claim.

                 (d)      If for any reason the foregoing indemnity is
unavailable, then, subject to the proviso in Section 1.7(b) in the case of
Holder, the indemnifying Person shall contribute to the amount paid or payable
by the indemnified Person as a result of such losses, claims, damages,
liabilities or expenses (i) in such proportion as is appropriate to reflect the
relative benefits received by the indemnifying Person on the one hand the
indemnified Person on the other or (ii) if the allocation provided by clause
(i) above is not permitted by applicable law, in such proportion as is
appropriate to reflect not only the relative benefits received by the
indemnifying Person on the one hand and the indemnified Person on the other but
also the relative fault of the indemnifying Person and the indemnified Person
as well as any other relevant equitable considerations. The relative fault of
the indemnifying Person on the one hand and of the indemnified Person on the
other shall be determined by reference to, among other things, whether the
untrue or alleged untrue statement of a material fact or the omission or
alleged omission to state a material fact relates to information supplied by
the indemnifying Person or by the indemnified Person and by the Persons'
relative intent, knowledge, access to information and opportunity to correct or
prevent such statement or omission. The amount paid or payable by a Person as a
result of the losses, claims, damages, liabilities and expenses shall be deemed
to include any legal or other fees or expenses reasonably incurred by the
Person in connection with investigating or defending any action or claim. No
Person guilty of fraudulent misrepresentation (within the meaning of Section
11(f) of the Securities Act) shall be entitled to contribution from any Person
who was not guilty of such fraudulent misrepresentation. The obligation of any
underwriters to contribute pursuant to this Section 1.7 shall be several in
proportion to their respective underwriting commitments and not joint.

                 (e)      An indemnifying Person shall make payments of all
amounts required to be made pursuant to the foregoing provisions of this
Section 1.7 to or for the account of the indemnified Person from time to time
promptly upon receipt of bills or invoices relating thereto or when otherwise
due or payable.

         1.8     TRANSFER OF REGISTRATION RIGHTS. The registration rights set
forth in this Agreement are transferable only in connection with the sale or
other transfer to a single purchaser (which purchaser (if not an Affiliate of
Oxy) must be approved in advance and in writing by Nabors, with such approval
not to be unreasonably withheld) of all (but not less than all) of the
Registrable Securities, provided such purchaser agrees (in a writing that names
Nabors as an explicit third party beneficiary) to be bound by all of the terms
and conditions of this Agreement.

         1.9     MERGER OR CONSOLIDATION OF NABORS. Nabors will not merge or
consolidate with or into any other corporation unless the corporation resulting
from such merger or consolidation (if not Nabors) shall expressly assume, by
supplemental agreement, the due and punctual performance and observance of each
and every covenant and condition of this Agreement to be performed and observed
by Nabors.
<PAGE>   8
         1.10    RESTRICTIONS ON TRANSFER.

         1.10.1  TRANSFER RESTRICTIONS.    (a)     The Holder acknowledges that
Nabors issued and sold the Registrable Securities owned by the Holder in
reliance upon the exemption afforded by Section 4(2) of the Securities Act for
transactions by an issuer not involving any public offering. The Holder
represents that (1) it has acquired the Registrable Securities for investment
and without any view toward distribution of any of the Registrable Securities
to any other Person, (2) it will not sell or otherwise dispose of the
Registrable Securities except in compliance with the registration requirements
or exemption provisions under the Securities Act and (3) before any sale or
other disposition of any of the Registrable Securities (other than in a sale
registered under the Securities Act, or pursuant to Rule 144 under the
Securities Act unless Nabors shall have been advised by counsel that such sale
does not meet the requirements of Rule 144 for the sale), it will deliver to
Nabors an opinion of counsel reasonably satisfactory to Nabors to the effect
that such registration is unnecessary. Subject to the foregoing, the Holder may
freely sell or transfer the Registrable Securities; provided, however, that
other than a sale registered under the Securities Act, or pursuant to Rule 144
under the Securities Act, any such transfer shall consist of not less than all
of the Registrable Securities.

                 (b)      Except as otherwise permitted by this Section 1.10,
the certificate evidencing the Registrable Securities shall be stamped or
otherwise imprinted with a legend in substantially the following form:

                          "THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT
                 BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933 AND MAY NOT
                 BE TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN
                 EXEMPTION THEREFROM UNDER SAID ACT, EXCEPT UNDER CIRCUMSTANCES
                 WHERE NEITHER SUCH REGISTRATION NOR SUCH AN EXEMPTION IS
                 REQUIRED- BY LAW. SUCH SHARES MAY BE TRANSFERRED ONLY IN
                 COMPLIANCE WITH THE CONDITIONS SPECIFIED IN A CERTAIN
                 REGISTRATION RIGHTS AGREEMENT. A COMPLETE AND CORRECT COPY OF
                 THE FORM OF SUCH AGREEMENT IS AVAILABLE FOR INSPECTION AT THE
                 PRINCIPAL OFFICE OF NABORS INDUSTRIES, INC. AND WILL BE
                 FURNISHED TO THE HOLDER OF SUCH SHARES UPON WRITTEN REQUEST
                 AND WITHOUT CHARGE."

         1.10.2  TERMINATION OF RESTRICTIONS. The restrictions imposed by this
Section 1.10 upon the transferability of Registrable Securities shall cease
and terminate as to any particular Registrable Securities (a) when such
securities shall have been effectively registered under the Securities Act, or
(b) when, in the opinions of both counsel for the holder thereof and counsel
for Nabors, such restrictions are no longer required in order to insure
compliance with the Securities Act or (c) when such securities have been
beneficially owned, by a person who has not been an affiliate of Nabors for at
least three months, for a period of at least three years (or such shorter
period as shall be determined under Rule 144 under the Securities Act), all as
determined pursuant to Rule 144 under the Securities Act. Whenever such
restrictions shall cease and terminate as to any Registrable Securities, the
holder thereof shall be entitled to receive from Nabors, without expense (other
than applicable transfer taxes, if any), new securities of like tenor not
bearing the applicable legend required by Section 1.10.1. Nabors will pay the
reasonable fees and disbursements of counsel for any holder of Registrable
Securities (other than house counsel) and of counsel for Nabors in connection
with any opinions rendered by them pursuant to this Section 1.10.
<PAGE>   9
         1.11    CERTAIN DEFINITIONS. As used herein, the following defined
terms shall have the following meanings:

         "Affiliate": any Person that is an "affiliate" within the meaning of
the regulations promulgated under the Securities Act.

         "Business Day": any day, other than a Saturday, Sunday or a day on
which commercial banking institutions in the City of New York, State of New
York, are required or authorized by law to close.

         "Closing": as defined in the Stock Purchase Agreement.

         "Commission": the Securities and Exchange Commission or any other
federal agency at the time administering the Securities Act.

         "Common Stock": the Common Stock, par value $.10 per share, of Nabors.

         "Equity Securities": of a Person means the capital or voting stock of
such Person and all other securities convertible into, or exchangeable or
exercisable for, any shares of such capital or voting stock, all rights to
subscribe for or to purchase, all options and warrants for the purchase of, and
all calls, commitments or claims of any character relating to, any shares of
such capital or voting stock, all equity equivalents, interests in the
ownership or earnings or other similar rights of, or with respect to, such
Person, and any securities convertible into or exchangeable or exercisable for
any of the foregoing.

         "Holder": Oxy, or the purchaser (in a transfer made in compliance with
Section 1.8) of all Registrable Securities.

         "NASD": The National Association of Securities Dealers, Inc.

         "Person": a corporation, a limited liability company, an association,
a partnership, an organization, a business, an individual, a government or
political subdivision thereof or a governmental agency.

         "Registrable Securities": shares of Common Stock originally acquired
by Oxy pursuant to the Stock Purchase Agreement, provided, that such shares of
Common Stock shall cease to be Registrable Securities when (w) a registration
statement with respect to the sale of such shares shall have become effective
under the Securities Act and such shares shall have been disposed of in
accordance with such registration statement, (x) they shall have been
distributed to the public pursuant to Rule 144 under the Securities Act, (y)
they shall have otherwise been transferred, new instruments or certificates of
them not bearing a legend restricting further transfer shall have been
delivered by Nabors and subsequent disposition of them shall not require
registration or qualification of them under the Securities Act or any similar
state law then in force, or (z) they shall have ceased to be outstanding.

         "Securities Act": The Securities Act of 1933, as amended, or any
similar federal statute, and the rules and regulations of the Commission
thereunder, all as the same shall be in effect at the time.
<PAGE>   10
         "Stock Purchase Agreement": Stock Purchase Agreement, dated as of
March 8, 1996, between Nabors and Oxy, as amended by Amendment No. 1 to Stock
Purchase Agreement, dated as of April 23, 1996, between Nabors and Oxy.

         "Termination Date": the third anniversary of the Closing, provided
that, if the minimum holding period under Rule 144 applicable to resales of
securities by non-affiliates in compliance with the volume and manner of sale
requirements of such Rule is reduced, "Termination Date" shall mean a
comparable period after the Closing.

         1.12    GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK, WITHOUT REGARD
TO PRINCIPLES OF CONFLICTS OF LAWS.

         1.13    SUCCESSORS AND ASSIGNS. The terms of this Agreement shall be
binding upon and inure to the benefit of (i) Nabors and its successors and
assigns and (ii) Holder and its successors and assigns. NOTHING CONTAINED IN
THIS AGREEMENT, EXPRESS OR IMPLIED, IS INTENDED OR SHALL BE CONSTRUED TO CONFER
UPON OR TO GIVE TO ANY PERSON, OTHER THAN NABORS AND HOLDER, AND THEIR
RESPECTIVE SUCCESSORS AND ASSIGNS, ANY RIGHTS, REMEDIES OR OBLIGATIONS UNDER OR
BY REASON, OF THIS AGREEMENT.

         1.14    ENTIRE AGREEMENT. This Agreement (including the documents
referred to herein) constitutes the entire agreement between the parties
hereto, and supersedes all prior understandings and agreements, with respect to
the subject matter hereof.

         1.15    COUNTERPARTS. This Agreement may be executed in any number of
counterparts, each of which when so executed shall be deemed an original, but
all of which together shall constitute one and the same instrument.

         1.16    NOTICES. All notices and other communications hereunder shall
be in writing and may be sent by (i) personal delivery (including courier
service), (ii) telecopier during normal business hours to the number indicated
below, or (iii) first class or registered or certified mail, postage prepaid,
and addressed as follows:

                 IF TO OXY AT:

                          Occidental Oil and Gas Corporation
                          1200 Discovery Drive
                          Bakersfield, California 93309-7008
                          Attention: Executive Vice President and Chief 
                          Financial Officer
                          Telecopier: (805) 322-7457

                 WITH A COPY TO:

                          Occidental Petroleum Corporation
                          10889 Wilshire Boulevard
                          Los Angeles, California 90024
                          Attention: Vice President - Operations
                          Telecopier: (310) 443-6331
<PAGE>   11
                 IF TO NABORS AT:

                          Nabors Industries, Inc.
                          515 West Greens Road, Suite 1200
                          Houston, Texas 77067
                          Attention: Anthony G. Petrello, President
                          Telecopier No.: (713) 872-5205

                 WITH A COPY TO:

                          Baker & McKenzie
                          805 Third Avenue
                          New York, New York 10022
                          Attention: Howard M. Berkower
                          Telecopier: (212) 759-9133


         Nabors or any Holder may change or add its address or telecopier
number to which notices and other communications hereunder are to be delivered
by giving Nabors or such Holder, as the case may be, notice in the manner
herein set forth. Each notice and other communication shall be effective (1) if
given by telecopier, when the telecopy is transmitted to the proper address and
the receipt of the transmission is confirmed, (2) if given by mail, 72 hours
after the notice or other communication is deposited in the mail properly
addressed with first class postage prepaid or (3) if given by any other means,
when delivered to the proper address and a written acknowledgment of delivery
is received.

         1.17    HEADINGS. The descriptive headings of the several Sections of
this Agreement are inserted for convenience only and do not constitute a part
of this Agreement.

         1.18    SEVERABILTY. Any provision of this Agreement which is
prohibited or unenforceable in any jurisdiction shall, as to that jurisdiction,
be ineffective to the extent of the prohibition or unenforceability without
invalidating the remaining provisions of the Agreement or affecting the
validity or enforceability of such provision in any other jurisdiction.

         1.19    CONSTRUCTION. Personal pronouns, when used in this Agreement,
whether in the masculine, feminine or neuter gender, shall include all other
genders, and the singular shall include the plural, and vice versa. All
references in this Agreement to (i) Sections or subsections shall refer to the
corresponding Section or subsection of this Agreement, unless specific
reference is made to a Section or subsection of another document or instrument,
and (ii) an Annex shall refer to the corresponding Annex to this Agreement. Any
reference in this Agreement to any federal, state, local or foreign statute or
law shall be deemed also to refer to all rules and regulations promulgated
thereunder, unless the context requires otherwise. The word "including" shall
mean including without limitation.

         1.20    AMENDMENTS AND WAIVERS. No amendment, modification,
termination or waiver of any provision of the Agreement shall be valid unless
it shall be in writing and signed by Nabors and Holder. No waiver by Nabors or
any Holder of any default, misrepresentation, breach of warranty or covenant
hereunder, whether intentional or not, shall be deemed to extend to any prior
or subsequent default, misrepresentation, breach of warranty or covenant
hereunder or to affect in any way any rights arising by virtue of any prior or
subsequent such occurrence.
<PAGE>   12
                 IN WITNESS WHEREOF, the parties have caused this Registration
Rights Agreement to be executed as of the date first above written.


                                        NABORS INDUSTRIES, INC.


                                        By:
                                        Name:    Richard A. Stratton 
                                        Title:   Vice Chairman


                                        OCCIDENTAL OIL & GAS CORPORATION


                                        By:
                                        Name:    Charles A. Purser 
                                        Title:   Assistant Secretary
<PAGE>   13
________________________________________________________________________ANNEX  A

Merrill Lynch, Pierce, Fenner & Smith Incorporated

Goldman, Sachs & Co.

Salomon Brothers Inc

Paine Webber Incorporated

Howard, Weil, Labouisse, Friedrichs Inc.

Simmons & Co.

<PAGE>   1
                                                                    EXHIBIT 10.4


                                 1994 EXECUTIVE
                             STOCK OPTION AGREEMENT
                            NABORS INDUSTRIES, INC.




       This Agreement is effective the 28th day of December, 1994, between
NABORS INDUSTRIES, INC., a Delaware corporation (the "Company"), and EUGENE M.
ISENBERG ("Optionee"),

                              W I T N E S S E T H:

       1.     Grant of Option.  The Company hereby grants to Optionee, subject
to the terms and conditions herein set forth (the "Plan"), the right and option
to purchase from the Company all or any part of an aggregate of 1,800,000
shares of Stock of the Company at the purchase price of $6.375 per share, such
option to be exercisable as hereinafter provided.

       2.     Terms and Conditions.  The option evidenced hereby is subject to
the following terms and conditions:

              (a)    Expiration Date.  The option shall expire on December 27,
2004.

              (b)    Exercise of Option.  Subject to the accelerated vesting as
otherwise provided for in this Agreement, the option shall be exercisable in
four equal installments in accordance with the following schedule:  450,000 on
October 1, 1995 (the "First Installment"), a further 450,000 on October 1, 1996
(the "Second Installment"), a further 450,000 on
<PAGE>   2
October 1, 1997 ( the "Third Installment"), and a further 450,000 on October 1,
1998 (the "Fourth Installment").  However, in the event that the Common Stock
of the Company trades at or above the Average Closing Price on or prior to the
scheduled vesting date indicated in the table below, the relevant installment
will be accelerated and become immediately vested:

<TABLE>
<CAPTION>
                       SCHEDULED                    ACCELERATED IF
    INSTALLMENT      VESTING DATE       AVERAGE CLOSING PRICE EQUALS OR EXCEEDS
    -----------      ------------       ---------------------------------------
       <S>          <C>                                <C>     
       First        October 1, 1995                     $7.3313 
       Second       October 1, 1996                     $8.4309 
       Third        October 1, 1997                     $9.6956 
       Fourth       October 1, 1998                    $11.1499
</TABLE>

In addition, in the event any installment is vested early as provided for in
the preceding sentence, new options (hereinafter the "Reload Options") equal in
number to the number of options of the installments vesting early shall be
granted to the Optionee upon the exercise of such vested options or any other
options held by the Optionee pursuant to any other grant prior, or subsequent,
to the effective date of this Agreement in a number equal to the number of such
options exercised.  These Reload Options will have an exercise price equal to
the Closing Price on the date of the new grant and shall be immediately vested
and exercisable for a period from the date of grant through the expiration date
of the original option replaced.  Any option not exercised on any applicable
vesting date may be exercised thereafter at any time, in whole or in part,
before the relevant expiration date of the option.  Any exercise shall be
accompanied by a written notice to the Company specifying the number of shares
as to which the option is being exercised.  If the Optionee so requests, shares
of  Common Stock purchased upon exercise of an option may be issued in the name
of the Optionee or another person.
<PAGE>   3
              (c)    Payment of Purchase Price Upon Exercise.  At the time of
any exercise, Optionee shall deliver to the Company, together with the notice
provided in paragraph (b) above, the full amount of the purchase price
therefore payable either by bank cashier's check or certified check payable to
the order of the Company or in Common Stock delivered by the Optionee valued at
the Closing Price of such Common Stock, or any combination of cash or Common
Stock in the sole discretion of the Optionee.  The term "Closing Price" shall
be the last sale price regular way on the date of exercise of the option or, in
the case no sale takes place on such date, the average of the high bid and low
asked prices regular way, in either case on the principal National Securities
Exchange in which the Common Stock is listed or admitted to trading or, if the
shares of Common Stock are not listed or admitted to trading on any such
securities exchange, the last sales price in the over-counter market as
reported by NASDAQ or such other system then in use.  If the Common Stock is
not traded such that the Closing Price can be determined in accordance with the
preceding sentence, the Closing Price shall mean the fair market value of the
Common Stock as of the last day of the measuring period as determined by an
independent investment banker approved by the Corporation and the Employee.
The Average Closing Price shall be the average of the Closing Prices for a
twenty (20) day consecutive period of trading days.

              (d)    Exercise Upon Termination of Employment.  Any option
granted hereunder (including all Reload Options) may be exercised by the
Optionee, his heirs, devisees, legatees or assigns at any time before the
relevant expiration date, whether or not Optionee ceases to be an employee and
whether or not such employment is terminated by voluntary written resignation,
by action of the Company for cause, without cause, or by reason of death
<PAGE>   4
or disability, with respect to all options as to which his right of exercise
has vested as provided for in paragraph (b) or as to which his right of
exercise shall vest in accordance with the next sentence of this paragraph on
the date of his termination of employment.  In the event of a termination of
employment for any reason, except by the Company for cause or by voluntary
resignation by Optionee, all unvested options granted under this Agreement
shall be immediately exercisable as of the date of his termination of his
employment without regard to the installment provision set forth in paragraph
(b) above.  In this event, the target Average Closing Prices defined in
paragraph 2(b) shall be deemed to have been achieved on or before the scheduled
vesting date and Optionee shall also have the right to the Reload Options as
described therein.  The term "for cause" shall have the same meaning as in
section 4(a)(v) of the Optionee's Employment Agreement dated January 6, 1987
("Employment Agreement").

              (e)    Transferability.  This option may be transferred by the
Employee with the consent of the Company which shall not be unreasonably
withheld at any time; provided however, Section 2(d) of this Agreement shall be
applied based on the Employee and his status and not that of any assignee.

              (f)    Adjustments.  In the event of a reorganization,
recapitalization, stock split, stock dividend, Extraordinary Dividend,
combination of shares, consolidation, merger (other than a merger or
consolidation which does not result in any reclassification, conversion,
exchange or cancellation of outstanding shares), any sale or transfer by the
Company of all or substantially all of its assets or any tender offer or
exchange offer for or the acquisition, directly or indirectly, by any person or
group of all or a majority of the then outstanding voting securities of the
Company, rights offering, or any other change in the corporate structure or
<PAGE>   5
rights with respect to any shares of the Company, adjustments shall be made to
the number or type of stock subject to this Agreement and, in order to prevent
dilution or enlargement of the rights of Optionee, to the number of Options,
and the type and option price of stock subject to outstanding Options or as
provided below with respect to Extraordinary Dividend.  In the case of an
Extraordinary Dividend, the Optionee shall be entitled to have distributed to
him upon the exercise of any portion of the option an amount equal to the
Extraordinary Dividend he would have received had he exercised such portion of
the option immediately prior to the declaration of the Extraordinary Dividend.
For this purpose, an Extraordinary Dividend shall mean any dividend or
dividends paid or declared in the twelve month period immediately prior to the
day after any such declaration in excess in the aggregate of 7% of the average
Closing Price of the Common Stock during such period.

              (g)    Withholding of Taxes.  No stock may be granted or option
may be exercised unless the Grantee or the Optionee has paid, or has made
provision, satisfactory to the Committee for payment of, federal, state and
local income taxes, or any other taxes (other than stock transfer taxes) which
the Company may be obligated to collect as a result of the issue or transfer of
shares of Stock upon exercise of an option.  The Optionee may elect that shares
of Common Stock can be applied towards the payment of withholding taxes.

       3.     Treatment of Options as Non-Qualified Stock Options.  The Company
and Optionee acknowledge that the stock options granted hereunder shall be
treated as non-qualified stock options for U.S. federal income tax purposes.
<PAGE>   6
       4.     Registration, Listing and Qualification of Shares of Stock.

              (a)     Registration.  The Company, within six months of the date
any option granted pursuant to this Agreement first becomes vested and
exercisable, shall register all the shares underlying the options on a
Registration Statement on Form S-8 ("S-8").  The Company shall also prepare and
file a Form S-3 prospectus with such S-8.

              (b)    Listing.  The Company, within six months of the date any
option granted pursuant to this Agreement first becomes vested and exercisable,
shall list all the shares underlying the options on the American Stock Exchange
with an Additional Listing Application.

              (c)    Qualification.  The Company may require Optionee to
furnish to the Company, prior to the issuance of any shares upon the exercise
of all or any part of this option, an agreement in which Optionee acknowledges
the status of the shares and the conditions and the restrictions, if any, upon
their sale or distribution under the applicable securities laws.

       5.     Notices.  Any notice hereunder to the Company shall be addressed
to it at its office as follows: Attn: Corporate Secretary.  Any notice
hereunder to Optionee shall be addressed to him at Two North Breakers Row, Apt.
25-S, Palm Beach, Florida 33480.  Either party may designate at any time
hereafter in writing some other address.

       6.     Binding Agreement.  This Agreement constitutes the binding
agreement of the parties with respect to the grant of options to the Optionee
under the Plan.  Notwithstanding any discretionary authority possessed by the
Committee under the Plan or the Company to
<PAGE>   7
impose other terms or conditions on the grant or exercise of options, no
additional terms or condition (other than those expressly stated in this
Agreement) may be imposed by the unilateral action of the Committee or the
Company.  This Agreement may not be modified except by the mutual agreement of
the parties in writing.

       7.     No Termination or Amendment.  No termination or amendment of the
Plan by the Company, without the consent of Optionee, shall adversely affect
the rights of Optionee with respect to any option granted under this Agreement.

       8.     Governing Law.  This Agreement shall be construed in accordance
with and governed by the laws of the State of Delaware.

              IN WITNESS WHEREOF, the parties hereto have duly executed this
Agreement as of the day and year first written above.



                                         NABORS INDUSTRIES, INC.



                                         By:                                    
                                            ------------------------------------
                                                     Daniel McLachlin





                                                                                
                                         ---------------------------------------
                                                   EUGENE M. ISENBERG

<PAGE>   1
                                                                   EXHIBIT 10.5


                                 1994 EXECUTIVE
                             STOCK OPTION AGREEMENT
                            NABORS INDUSTRIES, INC.





       This Agreement is effective the 28th day of December, 1994, between
NABORS INDUSTRIES, INC., a Delaware corporation (the "Company"), and ANTHONY G.
PETRELLO ("Optionee"),

                              W I T N E S S E T H:

       1.     Grant of Option.  The Company hereby grants to Optionee, subject
to the terms and conditions herein set forth (the "Plan"), the right and option
to purchase from the Company all or any part of an aggregate of 1,600,000
shares of Stock of the Company at the purchase price of $6.375 per share, such
option to be exercisable as hereinafter provided.

       2.     Terms and Conditions.  The option evidenced hereby is subject to
the following terms and conditions:

              (a)    Expiration Date.  The option shall expire on December 27,
2004.

              (b)    Exercise of Option.  Subject to the accelerated vesting as
otherwise provided for in this Agreement, the option shall be exercisable in
four equal installments in accordance with the following schedule:  400,000 on
October 1, 1995 (the "First Installment"), a further 400,000 on October 1, 1996
(the "Second Installment"), a further 400,000 on October 1, 1997 ( the "Third
Installment"), and a further 400,000 on October 1, 1998 (the
<PAGE>   2
"Fourth Installment").  However, in the event that the Common Stock of the
Company trades at or above the Average Closing Price on or prior to the
scheduled vesting date indicated in the table below, the relevant installment
will be accelerated and become immediately vested:

<TABLE>
<CAPTION>
                        SCHEDULED                    ACCELERATED IF
   INSTALLMENT        VESTING DATE       AVERAGE CLOSING PRICE EQUALS OR EXCEEDS
   -----------        ------------       ---------------------------------------
     <S>             <C>                                <C>
      First          October 1, 1995                     $7.3313
     Second          October 1, 1996                     $8.4309
      Third          October 1, 1997                     $9.6956
     Fourth          October 1, 1998                    $11.1499
</TABLE>

In addition, in the event any installment is vested early as provided for in
the preceding sentence, new options (hereinafter the "Reload Options") equal in
number to the number of options of the installments vesting early shall be
granted to the Optionee upon the exercise of such vested options or any other
options held by the Optionee pursuant to any other grant prior, or subsequent,
to the effective date of this Agreement in a number equal to the number of such
options exercised.  These Reload Options will have an exercise price equal to
the Closing Price on the date of the new grant and shall be immediately vested
and exercisable for a period from the date of grant through the expiration date
of the original option replaced.  Any option not exercised on any applicable
vesting date may be exercised thereafter at any time, in whole or in part,
before the relevant expiration date of the option.  Any exercise shall be
accompanied by a written notice to the Company specifying the number of shares
as to which the option is being exercised.  If the Optionee so requests, shares
of  Common Stock purchased upon exercise of an option may be issued in the name
of the Optionee or another person.

              (c)    Payment of Purchase Price Upon Exercise.  At the time of
any exercise, Optionee shall deliver to the Company, together with the notice
provided in
<PAGE>   3
paragraph (b) above, the full amount of the purchase price therefore payable
either by bank cashier's check or certified check payable to the order of the
Company or in Common Stock delivered by the Optionee valued at the Closing
Price of such Common Stock, or any combination of cash or Common Stock in the
sole discretion of the Optionee.  The term "Closing Price" shall be the last
sale price regular way on the date of exercise of the option or, in the case no
sale takes place on such date, the average of the high bid and low asked prices
regular way, in either case on the principal National Securities Exchange in
which the Common Stock is listed or admitted to trading or, if the shares of
Common Stock are not listed or admitted to trading on any such securities
exchange, the last sales price in the over-counter market as reported by NASDAQ
or such other system then in use.  If the Common Stock is not traded such that
the Closing Price can be determined in accordance with the preceding sentence,
the Closing Price shall mean the fair market value of the Common Stock as of
the last day of the measuring period as determined by an independent investment
banker approved by the Corporation and the Employee.  The Average Closing Price
shall be the average of the Closing Prices for a twenty (20) day consecutive
period of trading days.

              (d)    Exercise Upon Termination of Employment.  Any option
granted hereunder (including all Reload Options) may be exercised by the
Optionee, his heirs, devisees, legatees or assigns at any time before the
relevant expiration date, whether or not Optionee ceases to be an employee and
whether or not such employment is terminated by voluntary written resignation,
by action of the Company for cause, without cause, or by reason of death or
disability, with respect to all options as to which his right of exercise has
vested as provided for in paragraph (b) or as to which his right of exercise
shall vest in accordance with the next sentence of this paragraph on the date
of his termination of employment.  In the event of a
<PAGE>   4
termination of employment for any reason, except by the Company for cause or by
voluntary resignation by Optionee, all unvested options granted under this
Agreement shall be immediately exercisable as of the date of his termination of
his employment without regard to the installment provision set forth in
paragraph (b) above.  In this event, the target Average Closing Prices defined
in paragraph 2(b) shall be deemed to have been achieved on or before the
scheduled vesting date and Optionee shall also have the right to the Reload
Options as described therein.  The term "for cause" shall have the same meaning
as in section 4(a)(vi) of the Optionee's Employment Agreement dated January 4,
1992 ("Employment Agreement").

              (e)    Transferability.  This option may be transferred by the
Employee with the consent of the Company which shall not be unreasonably
withheld at any time; provided however, Section 2(d) of this Agreement shall be
applied based on the Employee and his status and not that of any assignee.

              (f)    Adjustments.  In the event of a reorganization,
recapitalization, stock split, stock dividend, Extraordinary Dividend,
combination of shares, consolidation, merger (other than a merger or
consolidation which does not result in any reclassification, conversion,
exchange or cancellation of outstanding shares), any sale or transfer by the
Company of all or substantially all of its assets or any tender offer or
exchange offer for or the acquisition, directly or indirectly, by any person or
group of all or a majority of the then outstanding voting securities of the
Company, rights offering, or any other change in the corporate structure or
rights with respect to any shares of the Company, adjustments shall be made to
the number or type of stock subject to this Agreement and, in order to prevent
dilution or enlargement of the rights of Optionee, to the number of Options,
and the type and option price of stock subject to outstanding Options or as
provided below with respect to Extraordinary Dividend.  In the case
<PAGE>   5
of an Extraordinary Dividend, the Optionee shall be entitled to have
distributed to him upon the exercise of any portion of the option an amount
equal to the Extraordinary Dividend he would have received had he exercised
such portion of the option immediately prior to the declaration of the
Extraordinary Dividend.  For this purpose, an Extraordinary Dividend shall mean
any dividend or dividends paid or declared in the twelve month period
immediately prior to the day after any such declaration in excess in the
aggregate of 7% of the average Closing Price of the Common Stock during such
period.

              (g)    Withholding of Taxes.  No stock may be granted or option
may be exercised unless the Grantee or the Optionee has paid, or has made
provision, satisfactory to the Committee for payment of, federal, state and
local income taxes, or any other taxes (other than stock transfer taxes) which
the Company may be obligated to collect as a result of the issue or transfer of
shares of Stock upon exercise of an option.  The Optionee may elect that shares
of Common Stock can be applied towards the payment of withholding taxes.

       3.     Treatment of Options as Non-Qualified Stock Options.  The Company
and Optionee acknowledge that the stock options granted hereunder shall be
treated as non-qualified stock options for U.S. federal income tax purposes.

       4.     Registration, Listing and Qualification of Shares of Stock.

              (a)    Registration.  The Company, within six months of the date
any option granted pursuant to this Agreement first becomes vested and
exercisable, shall register all the shares underlying the options on a
Registration Statement on Form S-8 ("S-8").  The Company shall also prepare and
file a Form S-3 prospectus with such S-8.
<PAGE>   6
              (b)    Listing.  The Company, within six months of the date any
option granted pursuant to this Agreement first becomes vested and exercisable,
shall list all the shares underlying the options on the American Stock Exchange
with an Additional Listing Application.

              (c)    Qualification.  The Company may require Optionee to
furnish to the Company, prior to the issuance of any shares upon the exercise
of all or any part of this option, an agreement in which Optionee acknowledges
the status of the shares and the conditions and the restrictions, if any, upon
their sale or distribution under the applicable securities laws.

       5.     Notices.  Any notice hereunder to the Company shall be addressed
to it at its office as follows: Attn: Corporate Secretary.  Any notice
hereunder to Optionee shall be addressed to him at The Houstonian, 111 North
Post Oak Lane, Suite 445, Houston, Texas 77024.  Either party may designate at
any time hereafter in writing some other address.

       6.     Binding Agreement.  This Agreement constitutes the binding
agreement of the parties with respect to the grant of options to the Optionee
under the Plan.  Notwithstanding any discretionary authority possessed by the
Committee under the Plan or the Company to impose other terms or conditions on
the grant or exercise of options, no additional terms or condition (other than
those expressly stated in this Agreement) may be imposed by the unilateral
action of the Committee or the Company.  This Agreement may not be modified
except by the mutual agreement of the parties in writing.
<PAGE>   7
       7.     No Termination or Amendment.  No termination or amendment of the
Plan by the Company, without the consent of Optionee, shall adversely affect
the rights of Optionee with respect to any option granted under this Agreement.

       8.     Governing Law.  This Agreement shall be construed in accordance
with and governed by the laws of the State of Delaware.

              IN WITNESS WHEREOF, the parties hereto have duly executed this
Agreement as of the day and year first written above.





                                         NABORS INDUSTRIES, INC.



                                         By:                                    
                                            ------------------------------------
                                                     Daniel McLachlin





                                                                                
                                         ---------------------------------------
                                                    ANTHONY G. PETRELLO

<PAGE>   1
                                                                    EXHIBIT 10.6



                                 1994 EXECUTIVE
                             STOCK OPTION AGREEMENT
                            NABORS INDUSTRIES, INC.



       This Agreement is effective the 28th day of December, 1994, between
NABORS INDUSTRIES, INC., a Delaware corporation (the "Company"), and RICHARD A.
STRATTON ("Optionee"),

                              W I T N E S S E T H:

       1.     Grant of Option.  The Company hereby grants to Optionee, subject
to the terms and conditions herein set forth (the "Plan"), the right and option
to purchase from the Company all or any part of an aggregate of 200,000 shares
of Stock of the Company at the purchase price of $6.375 per share, such option
to be exercisable as hereinafter provided.

       2.     Terms and Conditions.  The option evidenced hereby is subject to
the following terms and conditions:

              (a)    Expiration Date.  The option shall expire on December 27,
2004.

              (b)    Exercise of Option.  Subject to the accelerated vesting as
otherwise provided for in this Agreement, the option shall be exercisable in
two equal installments in accordance with the following schedule:  100,000 on
December 28, 1995 (the "First Installment"), and a further 100,000 on December
28, 1996 (the "Second Installment").
<PAGE>   2
However, in the event that the Common Stock of the Company trades at or above
the Average Closing Price on or prior to the scheduled vesting date indicated
in the table below, the relevant installment will be accelerated and become
immediately vested:

<TABLE>
<CAPTION>
                        SCHEDULED                    ACCELERATED IF
   INSTALLMENT        VESTING DATE       AVERAGE CLOSING PRICE EQUALS OR EXCEEDS
   -----------        ------------       ---------------------------------------
     <S>            <C>                                  <C>
      First         December 28, 1995                    $7.3313
     Second         December 28, 1996                    $8.4309
</TABLE>

In addition, in the event any installment is vested early as provided for in
the preceding sentence, new options (hereinafter the "Reload Options") equal in
number to the number of options of the installments vesting early shall be
granted to the Optionee upon the exercise of such vested options or any other
options held by the Optionee pursuant to any other grant prior, or subsequent,
to the effective date of this Agreement in a number equal to the number of such
options exercised.  These Reload Options will have an exercise price equal to
the Closing Price on the date of the new grant and shall be immediately vested
and exercisable for a period from the date of grant through the expiration date
of the original option replaced.  Any option not exercised on any applicable
vesting date may be exercised thereafter at any time, in whole or in part,
before the relevant expiration date of the option.  Any exercise shall be
accompanied by a written notice to the Company specifying the number of shares
as to which the option is being exercised.  If the Optionee so requests, shares
of  Common Stock purchased upon exercise of an option may be issued in the name
of the Optionee or another person.

              (c)    Payment of Purchase Price Upon Exercise.  At the time of
any exercise, Optionee shall deliver to the Company, together with the notice
provided in paragraph (b) above, the full amount of the purchase price
therefore payable either by bank
<PAGE>   3
cashier's check or certified check payable to the order of the Company or in
Common Stock delivered by the Optionee valued at the Closing Price of such
Common Stock, or any combination of cash or Common Stock in the sole discretion
of the Optionee.  The term "Closing Price" shall be the last sale price regular
way on the date of exercise of the option or, in the case no sale takes place
on such date, the average of the high bid and low asked prices regular way, in
either case on the principal National Securities Exchange in which the Common
Stock is listed or admitted to trading or, if the shares of Common Stock are
not listed or admitted to trading on any such securities exchange, the last
sales price in the over-counter market as reported by NASDAQ or such other
system then in use.  If the Common Stock is not traded such that the Closing
Price can be determined in accordance with the preceding sentence, the Closing
Price shall mean the fair market value of the Common Stock as of the last day
of the measuring period as determined by an independent investment banker
approved by the Corporation and the Employee.  The Average Closing Price shall
be the average of the Closing Prices for a twenty (20) day consecutive period
of trading days.

              (d)    Exercise Upon Termination of Employment.  Any option
granted hereunder (including all Reload Options) may be exercised by the
Optionee, his heirs, devisees, legatees or assigns at any time before the
relevant expiration date, whether or not Optionee ceases to be an employee and
whether or not such employment is terminated by voluntary written resignation,
by action of the Company for cause, without cause, or by reason of death or
disability, with respect to all options as to which his right of exercise has
vested as provided for in paragraph (b) or as to which his right of exercise
shall vest in accordance with the next sentence of this paragraph on the date
of his termination of employment.  In the event of a termination of employment
for any reason, except by the Company for cause or by voluntary
<PAGE>   4
resignation by Optionee, all unvested options granted under this Agreement
shall be immediately exercisable as of the date of his termination of his
employment without regard to the installment provision set forth in paragraph
(b) above.  In this event, the target Average Closing Prices defined in
paragraph 2(b) shall be deemed to have been achieved on or before the scheduled
vesting date and Optionee shall also have the right to the Reload Options as
described therein.  The term "for cause" shall have the same meaning as in
section 4(a)(v) of the Optionee's Employment Agreement dated January 4, 1991
("Employment Agreement").

              (e)    Transferability.  This option may be transferred by the
Employee with the consent of the Company which shall not be unreasonably
withheld at any time; provided however, Section 2(d) of this Agreement shall be
applied based on the Employee and his status and not that of any assignee.

              (f)    Adjustments.  In the event of a reorganization,
recapitalization, stock split, stock dividend, Extraordinary Dividend,
combination of shares, consolidation, merger (other than a merger or
consolidation which does not result in any reclassification, conversion,
exchange or cancellation of outstanding shares), any sale or transfer by the
Company of all or substantially all of its assets or any tender offer or
exchange offer for or the acquisition, directly or indirectly, by any person or
group of all or a majority of the then outstanding voting securities of the
Company, rights offering, or any other change in the corporate structure or
rights with respect to any shares of the Company, adjustments shall be made to
the number or type of stock subject to this Agreement and, in order to prevent
dilution or enlargement of the rights of Optionee, to the number of Options,
and the type and option price of stock subject to outstanding Options or as
provided below with respect to Extraordinary Dividend.  In the case
<PAGE>   5
of an Extraordinary Dividend, the Optionee shall be entitled to have
distributed to him upon the exercise of any portion of the option an amount
equal to the Extraordinary Dividend he would have received had he exercised
such portion of the option immediately prior to the declaration of the
Extraordinary Dividend.  For this purpose, an Extraordinary Dividend shall mean
any dividend or dividends paid or declared in the twelve month period
immediately prior to the day after any such declaration in excess in the
aggregate of 7% of the average Closing Price of the Common Stock during such
period.

              (g)    Withholding of Taxes.  No stock may be granted or option
may be exercised unless the Grantee or the Optionee has paid, or has made
provision, satisfactory to the Committee for payment of, federal, state and
local income taxes, or any other taxes (other than stock transfer taxes) which
the Company may be obligated to collect as a result of the issue or transfer of
shares of Stock upon exercise of an option.  The Optionee may elect that shares
of Common Stock can be applied towards the payment of withholding taxes.

       3.     Treatment of Options as Non-Qualified Stock Options.  The Company
and Optionee acknowledge that the stock options granted hereunder shall be
treated as non-qualified stock options for U.S. federal income tax purposes.

       4.     Registration, Listing and Qualification of Shares of Stock.

              (a)     Registration.  The Company, within six months of the date
any option granted pursuant to this Agreement first becomes vested and
exercisable, shall register all the shares underlying the options on a
Registration Statement on Form S-8 ("S-8").  The Company shall also prepare and
file a Form S-3 prospectus with such S-8.
<PAGE>   6
              (b)    Listing.  The Company, within six months of the date any
option granted pursuant to this Agreement first becomes vested and exercisable,
shall list all the shares underlying the options on the American Stock Exchange
with an Additional Listing Application.

              (c)    Qualification.  The Company may require Optionee to
furnish to the Company, prior to the issuance of any shares upon the exercise
of all or any part of this option, an agreement in which Optionee acknowledges
the status of the shares and the conditions and the restrictions, if any, upon
their sale or distribution under the applicable securities laws.

       5.     Notices.  Any notice hereunder to the Company shall be addressed
to it at its office as follows: Attn: Corporate Secretary.  Any notice
hereunder to Optionee shall be addressed to him at 26344 McDonald Road, The
Woodlands, Texas 77380.  Either party may designate at any time hereafter in
writing some other address.

       6.     Binding Agreement.  This Agreement constitutes the binding
agreement of the parties with respect to the grant of options to the Optionee
under the Plan.  Notwithstanding any discretionary authority possessed by the
Committee under the Plan or the Company to impose other terms or conditions on
the grant or exercise of options, no additional terms or condition (other than
those expressly stated in this Agreement) may be imposed by the unilateral
action of the Committee or the Company.  This Agreement may not be modified
except by the mutual agreement of the parties in writing.
<PAGE>   7
       7.     No Termination or Amendment.  No termination or amendment of the
Plan by the Company, without the consent of Optionee, shall adversely affect
the rights of Optionee with respect to any option granted under this Agreement.

       8.     Governing Law.  This Agreement shall be construed in accordance
with and governed by the laws of the State of Delaware.

              IN WITNESS WHEREOF, the parties hereto have duly executed this
Agreement as of the day and year first written above.



                                         NABORS INDUSTRIES, INC.



                                         By:                                    
                                            ------------------------------------
                                                     Daniel McLachlin



                                                                                
                                         ---------------------------------------
                                                    RICHARD A. STRATTON

<PAGE>   1
                                                                   EXHIBIT 10.14


                            STOCK PURCHASE AGREEMENT

     This Stock Purchase Agreement, dated as of March 8, 1996, is by and
between Nabors Industries, Inc., a Delaware corporation, and Occidental Oil and
Gas Corporation, a California corporation.


                                    RECITALS


     WHEREAS, Oxy (as such term and certain other terms used in this Agreement
with initial capital letters are defined in Exhibit A)  owns, beneficially and
of record, all of the Stock; and

     WHEREAS, subject to, and in accordance with, the terms of this Agreement,
Nabors wishes to purchase from Oxy, and Oxy wishes to sell to Nabors, all of
the Stock for the Purchase Price; and

     WHEREAS, the Parties desire to set forth certain representations,
warranties and covenants made by each to the other as an inducement to the
consummation of such purchase and sale of the Stock;

     NOW, THEREFORE, in consideration of the premises and of the mutual
promises herein set forth, the Parties agree as follows:

     1.   PURCHASE AND SALE OF STOCK.

     (a)  BASIC TRANSACTION.  Upon the terms, and subject to the conditions, of
this Agreement, Nabors agrees to purchase from Oxy, and Oxy agrees to sell to
Nabors, all of the issued and outstanding shares of the Stock.

     (b)  PURCHASE PRICE.  The purchase price for the Stock (the "Purchase
Price")  shall be the Consideration.

     (c)  PAYMENT OF THE ESTIMATED CASH PORTION OF THE PURCHASE PRICE AT THE
CLOSING.  At the Closing, Nabors shall pay to Oxy the Estimated Cash Portion of
the Purchase Price, by wire transfer of immediately available funds into a bank
account of Oxy at a bank in New York, New York, the name of which bank and the
number of which account shall be furnished by Oxy to Nabors not later than
three Business Days prior to the Closing Date.





<PAGE>   2



     (d)  ESTIMATED CASH PORTION OF THE PURCHASE PRICE.  At least ten calendar
days prior to the Closing, Oxy shall prepare and deliver to Nabors a statement
setting forth (i)  an estimate of the amount of the Consolidated Working
Capital, and (ii)  a calculation of the Estimated Cash Portion of the Purchase
Price based upon such estimate.   In the event that Nabors does not agree with
Oxy's computation, Nabors shall promptly notify Oxy of the same, Oxy shall
promptly provide such additional information as Nabors shall reasonably request
to support such computations, and the Parties shall negotiate in good faith and
attempt to agree, at least three Business Days prior to the Closing Date, upon
an acceptable estimate of such amounts. Failing any such mutual agreement, the
Estimated Cash Portion of the Purchase Price delivered at the Closing shall be
$29,000,000.

     (e)  WARRANT. At the Closing, Nabors will issue the Warrant, with the
Warrant Exercise Price, the Warrant Expiration Date, and the Warrant Shares
calculated or determined pursuant to the provisions of this Agreement duly
inserted in the appropriate places thereon.  The number of the Warrant Shares
shall be adjusted in the event of any change in the Nabors Common Stock by
reason of the issuance of any Equity Securities, stock or other non-cash
dividends, extraordinary cash dividends, split-ups, mergers, recapitalizations,
combinations, subdivisions, conversions, exchange of shares or the like after
the date of this Agreement and on or before the Closing Date, such that, in
each case, Oxy shall receive upon the payment of the Warrant Exercise Price the
number and class of shares or other securities or property that would have been
received in respect of a share of the Nabors Common Stock if the Closing Date
had occurred immediately prior to such event, or the record date therefor, as
applicable.  No adjustment made pursuant to this Section 1(e)  shall constitute,
or be deemed to be, a waiver by Oxy of any breach of any of the
representations, warranties or obligations of Nabors contained in this
Agreement.

     (f)  CLOSING AND CLOSING DATE.  The closing (the "Closing")  of the 
purchase and sale of the Stock, as contemplated by this Agreement, shall take
place at the offices of Nabors, 1670 Broadway, Suite 3355, Denver, Colorado
80202, commencing at 9:00 a.m. (local time) on the date (the "Closing Date"),
which shall be the sixth Business Day following the satisfaction or waiver of
all of the conditions set forth in Section 6 (other than any such conditions
with respect to actions the respective Parties will take at the Closing
itself), but in no event prior to April 20, 1996, or on such other date, or at
such other place, as the Parties shall mutually agree.

     (g)  DELIVERIES AT THE CLOSING.  At the Closing, in addition to the payment
required by Section 1(c), (i)  Oxy will deliver to Nabors the various
certificates, instruments and documents referred to in Section 6(a), (ii)
Nabors will deliver to Oxy the various certificates, instruments and documents
referred to in Section 6(b), (iii)  Oxy will deliver to Nabors stock
certificates representing the Stock, endorsed in blank or accompanied by duly
executed stock powers, signature guaranteed, and (iv)  Nabors will deliver to
Oxy the Warrant duly executed by an authorized officer of Nabors.


                                      -2-
<PAGE>   3




     (h)  POST-CLOSING ADJUSTMENT.  On or before the date that is 125 calendar
days following the Closing Date (or the next Business Day if such date is not a
Business Day), Nabors will prepare and deliver to Oxy a statement (the
"Statement of Consolidated Working Capital")  showing the actual amount of the
Consolidated Working Capital on the Closing Date and the prorations under
Section 1(i).  Nabors shall make available to Oxy all information which shall
be in the possession of Nabors and which may be reasonably required by Oxy for
Oxy to verify whether such statement is correct.  Within 30 calendar days
following delivery of the Statement of Consolidated Working Capital, Oxy shall
notify Nabors whether it agrees with the Statement of Consolidated Working
Capital; provided, however, that, in the event that Oxy shall fail to so notify
Nabors within such 30-day period, Oxy shall be deemed to have agreed with the
Statement of Consolidated Working Capital.  In the event that Oxy disagrees
with the Statement of Consolidated Working Capital, Oxy shall provide Nabors
with a written notice specifying the basis for Oxy's disagreement, and Oxy and
Nabors shall work in good faith to reach agreement on the amount of the
Consolidated Working Capital on the Closing Date and such prorations, but, in
the event that they shall not agree within 30 calendar days following the date
of such written notice, either Oxy or Nabors may cause the matter to be
referred to one of the "Big Six" independent public accounting firms as Oxy and
Nabors may mutually agree.  The fees and disbursements of such accountants
shall be borne equally by Nabors and Oxy.  Such accountants shall examine the
records of Oxy, the Companies and Nabors, and, within 30 calendar days
following the date upon which such matter shall be referred to such
accountants, such accountants shall determine both the amount of the
Consolidated Working Capital as of the Closing Date and such prorations. Any
such determination (i)  shall be final and binding on the Parties, and (ii)  may
be enforced by appropriate judicial or other proceedings.  The Cash Portion of
the Purchase Price shall reflect any such determination by such accountants.
In the event that the Cash Portion of the Purchase Price (whether by agreement
of the Parties or after giving effect to any such determination by such
accountants)  exceeds the Estimated Cash Portion of the Purchase Price paid at
the Closing, Nabors shall pay to Oxy the amount of such excess plus interest
thereon from the Closing Date until paid at a rate per annum equal to the
Reference Rate.  In the event that the Cash Portion of the Purchase Price
(whether by agreement of the Parties or after giving effect to any such
determination by such accountants)  is less than the Estimated Cash Portion of
the Purchase Price paid at the Closing, Oxy shall pay to Nabors the amount of
such shortfall plus interest thereon from the Closing Date until paid at a rate
per annum equal to the Reference Rate.  Such payment shall be made, in either
case, within 15 calendar days following the agreement of the Parties or the
final determination of the Cash Portion of the Purchase Price by such
accountants.  All of such interest shall be computed on the basis of the
nactual number of days elapsed in a year of 365 or 366 days, as the case may
be.

     (i)  PRORATIONS. All Taxes shall be prorated in accordance with Section
5(g)(2). Such Taxes, and water and sewer charges, utility charges, governmental
license fees, vehicle and special mechanical equipment licenses, deposits
(including, without limitation, deposits on Contracts), advance or prepaid
royalties, prepaid expenses and rents paid by any of the Companies to Persons
other than Oxy or its Affiliates, and other similar items referred to on
Schedule 1(i), in each case paid prior to or after the Closing Date by means of
estimated

                                      -3-

<PAGE>   4

payments or otherwise and applicable to pre-Closing and post-Closing periods,
shall be prorated as of the Closing and, if not otherwise reflected in
Consolidated Working Capital, shall be added as part of Consolidated Working
Capital to the extent paid prior to the Closing and related to a period after
the Closing and subtracted from Consolidated Working Capital to the extent to
be paid after the Closing and related to a period prior to the Closing. For
prorated items of expense which should be paid in advance prior to the Closing,
Oxy shall cause the Companies to make such payments before Closing. For
prorated items of expense which are paid in arrears on or after the Closing,
Nabors shall cause the Companies to pay and discharge, in a timely manner, any
amount so prorated. To the extent that a particular prorated item is disputed,
such dispute shall be resolved pursuant to Section 1(h).

     Oxy shall use reasonable efforts to arrange to have (i)  meters for
electricity, telephone, and gas and water read on the Closing Date, and (ii)
bills and statements rendered to the Companies based on such readings.  Each
Party shall, promptly upon receipt, deliver to the other Party copies of each
relevant bill or statement which may be in its records.

     (j)  CONDEMNATION OF, OR MATERIAL DAMAGE TO, ASSETS.  In the event of,
prior to the Closing, (a)  the destruction of, or material damage to, any Asset
which shall have a Fair Market Value exceeding $50,000 (a "Casualty Event"),
which Oxy shall have elected not to repair, rebuild, restore or replace as
provided below, or (b)  the condemnation of any Asset which shall have a Fair
Market Value exceeding $50,000, Nabors, at its option, may elect, prior to the
Closing:

          (i)  to exclude such Asset and to treat such Asset as an Excluded
Asset, provided, however, that the Purchase Price shall be reduced by the Fair
Market Value of such Asset to reflect the exclusion of such Asset; or

          (ii) in the event that such Asset or all such Assets shall have a
Fair Market Value which shall exceed $1 million, not to consummate the
transactions contemplated by this Agreement.

     Oxy shall give Nabors prompt written notice (a "Casualty Notice")  of any
such condemnation or Casualty Event, indicating the Asset or Assets which
suffered such condemnation or Casualty Event, and Oxy's estimate of the Fair
Market Value of each such Asset, accompanied, in the case of any Casualty
Event, by copies of all insurance related thereto, any deductibles or retention
applicable thereto, any defenses threatened or asserted by the insurer or known
to Oxy, its estimate of, and all available information relevant to, the cost of
repair, rebuilding, restoration or replacement thereof, and any other
information reasonably requested by Nabors.  In the case of any retention or
deductible, Oxy shall provide to Nabors prompt notice of such retention or
deductible.

     In the event of the occurrence of any Casualty Event with respect to any
Asset, Oxy may, in the applicable Casualty Notice, elect to cause the Company
which shall Own such Asset to repair, rebuild, restore or replace such Asset.
Upon any such election, Nabors shall


                                      -4-
<PAGE>   5

have the option, exercisable by notice to Oxy on or before the fifth Business
Day after such Casualty Notice (but in any event prior to the Closing), to
accept such Asset without such repair, rebuilding, restoration or replacement,
in which event the Purchase Price shall be reduced by the estimated cost of
repair, rebuilding, restoration or replacement as set forth in such Casualty
Notice. In the event that Nabors does not exercise such option, Oxy shall
promptly undertake to provide sufficient funds to, and otherwise to cause, such
Company to repair, rebuild, restore or replace such Asset to substantially the
same condition as prior to the event causing such destruction or damage.

     With respect to any such Asset that has been condemned or has suffered a
Casualty Event (other than any Asset that Oxy has elected to repair, rebuild,
restore or replace), Nabors may, in lieu of any reduction to the Purchase Price
set forth in the proviso to clause (i)  of this Section 1(j)  and by notice to
Oxy set forth in the election by Nabors referred to in the first paragraph of
this Section 1(j), request that Oxy, and, upon any such request, Oxy shall, (i)
pay to such Company, at the Closing, all sums theretofore paid to Oxy by third
parties (but not paid to such Company)  by reason of such condemnation or
Casualty Event,  (ii)  assign to such Company, no later than the Closing, all of
the right, title and interest of Oxy in and to any unpaid awards or other
amounts payable by third parties or under Oxy's personal property and casualty
insurance policies arising out of such condemnation or Casualty Event, and
(iii)  pay to such Company any deductible or retention under any applicable
insurance to the extent not previously paid to such Company.

     Oxy shall not, without the consent of Nabors, compromise, settle or adjust
any material amounts receivable by reason of any condemnation or Casualty Event
occurring with respect to any such Asset.

     (k)  TAKING OF NECESSARY ACTION; FURTHER ACTION.  The Parties hereto shall
take all such reasonable and lawful action as may be necessary or appropriate
in order to effectuate the transactions contemplated hereby as promptly as
possible.  If, at any time after the Closing Date, any such further action is
necessary or desirable to carry out the purposes of this Agreement, Oxy and
Nabors shall, and shall direct their respective representatives to, take all
such lawful and necessary action.

     2.   REPRESENTATIONS AND WARRANTIES OF OXY.

     Oxy represents and warrants to Nabors that:

     (a)  ORGANIZATION OF OXY AND THE COMPANIES.  Oxy is a corporation duly
incorporated, validly existing and in good standing under the laws of the State
of California.  Exeter is a corporation duly incorporated, validly existing and
in good standing under the laws of the State of Nevada.  Each of the Exeter
Subsidiaries is a corporation duly incorporated, validly existing and in good
standing under the laws of the State of Delaware.



                                      -5-
<PAGE>   6

     (b)  AUTHORIZATION OF TRANSACTION BY OXY.  Oxy has all requisite corporate
power and authority to execute and to deliver this Agreement, to perform its
obligations hereunder and to consummate the transactions contemplated hereby.
The execution and delivery by Oxy of this Agreement and the consummation by Oxy
of the transactions contemplated hereby have been duly authorized by all
necessary corporate action on the part of Oxy.  This Agreement has been duly
executed and delivered by Oxy and constitutes the legally valid and binding
obligation of Oxy, enforceable against Oxy in accordance with its terms, except
as enforceability is limited by applicable bankruptcy, insolvency,
reorganization, moratorium or similar laws affecting creditors' rights
generally and equitable principles (whether applied in a court of law or
equity).  Oxy is not obligated to give any notice to, to make any filing or
registration with, or to obtain any authorization, consent, approval or order
of, any Governmental Authority in order to consummate the transactions
contemplated by this Agreement, other than (i)  compliance with the applicable
requirements of the Hart-Scott-Rodino Act, (ii)  as set forth on Schedule 2(b),
(iii)  filings with Governmental Authorities in the Ordinary Course of Business
of Oxy or the Companies that are not required to be made prior to the
consummation of the transactions contemplated hereby, or (iv)  such
authorizations, consents, approvals or orders that, if not obtained, and such
notices, filings or registrations that, if not made, would not, individually or
in the aggregate, have (A)  a Material Adverse Effect with respect to the
Companies, or (B)  any adverse effect on the ability of Oxy to perform this
Agreement.

     (c)  QUALIFICATION AND CORPORATE POWER OF THE COMPANIES. Each of the
Companies has all requisite corporate power and authority to own, lease and
operate its properties and to carry on the business in which it is engaged and
is duly qualified to do business in each jurisdiction in which the nature of
the business conducted by it or the ownership or leasing of its properties
makes such qualification necessary, except where the failure to be so qualified
would not result, individually or in the aggregate, in a Material Adverse
Effect with respect to the Companies. Exeter has received a ministerial decree
which grants a license to exercise activities in the Republic of Yemen, and
International has established and is qualified to act through a registered
branch office in Venezuela. No dissolution, liquidation or bankruptcy
proceeding is pending, contemplated or threatened against any of the Companies.
Oxy has made available to Nabors copies of the respective charter and bylaws
(in each case as amended to date)  of each of the Companies, and all of such
documents are in effect and are correct and complete. The minute books
(containing the records of meetings of the stockholders, the board of
directors, and any committees of the board of directors), the stock certificate
books and the stock record books of each of the Companies are correct and
complete in all material respects. None of the Companies is in default under,
or in violation, of any provision of its charter or bylaws.

     (d)  CAPITALIZATION OF THE COMPANIES. The authorized capital stock of each
of the Companies, and the respective amounts thereof issued and outstanding,
are listed in Schedule 2(d). All of the issued and outstanding shares of the
capital stock of each of the Companies have been duly authorized and are
validly issued, fully paid, and nonassessable, and no shares of such capital
stock are subject to, nor have been issued in violation of, preemptive rights.
All

                                      -6-
<PAGE>   7

of the issued and outstanding shares of the Exeter Common Stock (the "Stock")
is held, beneficially and of record, by Oxy. All of the issued and outstanding
shares of the capital stock of each of the Exeter Subsidiaries is held,
beneficially and of record, by Exeter. All issued and outstanding shares of the
capital stock of each of the Companies are free and clear of any Taxes and
Liens. Except as referred to above, there are outstanding (i)  no Equity
Securities of any of the Companies, and (ii), except for the obligations of Oxy
and Nabors pursuant to this Agreement, no options or other rights to acquire
from Oxy, and no obligations of Oxy to issue or sell, any Equity Securities of
any of the Companies. There are no outstanding obligations of any of the
Companies to repurchase, redeem or otherwise acquire any shares of its capital
stock.

     (e)  SUBSIDIARIES. Exeter's only subsidiaries are Gibson and
International. Gibson and International have no subsidiaries.

     (f)  ABSENCE OF CERTAIN ACTIONS. Other than (i) as permitted by Section
4(c), (ii) any extension or renewal of the Contract referred to in clause (i)
of the definition of International Contract, (iii) the establishment of the
Severance Program, (iv) the pipe purchase reflected in AFE number 5204 of
Exeter, (v) the pay increase granted by each of the Companies to its Employees
in February 1996 and effective, with respect to Gibson, on January 28, 1996,
and, with respect to Exeter and International, on February 12, 1996, (vi) any
bid referred to in clause (k) of Section 4(c) which is not pending as of the
date of this Agreement, (vii) any Contract resulting from any bid referred to
in such clause (k) which shall have been performed prior to the date of this
Agreement, and (viii) as set forth on Schedule 2(f), since December 31, 1995,
there has not been any event, transaction or condition of the type requiring
the consent of Nabors pursuant to Section 4(c).

     (g)  LEGAL COMPLIANCE; NONCONTRAVENTION. No action, suit, proceeding,
hearing, investigation, charge, complaint, claim, demand or notice seeking to
restrain, prohibit or obtain damages or other relief in connection with this
Agreement or the transactions contemplated hereby has been filed or commenced
against the Companies, and, to the Knowledge of Oxy, no such action, suit,
proceeding, hearing, investigation, charge, complaint, claim, demand or notice
has been threatened to be so filed or so commenced. The execution and delivery
of this Agreement by Oxy does not, and the performance of this Agreement by Oxy
will not, (i)  conflict with, or violate, the articles of incorporation or
bylaws of Oxy, (ii)  conflict with, or violate, any Law in effect as of the date
of this Agreement and applicable to Oxy or by which any of the properties of
Oxy are bound or affected, or (iii)  result in any breach of, or constitute a
default (or an event that with notice or lapse of time or both would become a
default)  under, or give to any Person (other than Oxy or the Companies)  any
right of termination, amendment, acceleration or cancellation of, or require
payment under, or result in the creation of any Lien on any of the Assets of
any of the Companies pursuant to, any International Contract to which any of
the Companies is a party, except, in the case of clauses (ii)  and (iii)  above,
for such conflicts, violations, breaches, defaults, events, rights of
termination, amendment, acceleration or cancellation, payment obligations or
Liens that would not, individually or in the aggregate, have a Material Adverse
Effect with respect to the Companies.



                                      -7-
<PAGE>   8



     (h)  TITLE TO STOCK. Oxy has record and beneficial ownership of the Stock,
and Nabors will acquire, upon consummation of the transactions contemplated by
this Agreement, record and beneficial ownership of the Stock, free and clear of
all Liens (other than any Lien which shall have been created by or through
Nabors or any of its Affiliates).

     (i)  DRILLING AND WORKOVER RIGS.  Schedule 2(i)  (i)  lists and describes
briefly all of the drilling and workover rigs Owned by any of the Companies
(other than (1)  any rig which is not actively marketed, and (2)  any Excluded
Asset), and (ii)  sets forth the location of such rigs as of the date of this
Agreement.

     (j)  EMPLOYEES AND EMPLOYEE BENEFIT MATTERS.

          (1)  To the Knowledge of Oxy, all of the Employees of the Companies
     are employed on an at-will basis and may be terminated without cause.

          (2)  None of the Companies is a party to any collective bargaining
     agreement within the United States, and no such collective bargaining
     agreement is being negotiated by, or with respect to, any of the
     Companies.

          (3)  Oxy has delivered to Nabors a copy of the Severance Program. None
     of the Companies maintains any other severance program.

          (4)  The plans, programs and arrangements set forth on Schedule 2(j)
     of the Disclosure Schedule are herein referred to as the "Companies
     Employee Benefit Plans." With respect to each of the Companies Employee
     Benefit Plans, Oxy has made available to Nabors true and complete copies
     of: (a) all plan documents, including any related trust agreements,
     insurance contracts or other funding arrangements; (b) the most recent
     determination letter received from the Internal Revenue Service (where
     applicable); (c) the most recent IRS Series 5500 Form, including, where
     applicable, the most recent financial statement; and (d) the most recent
     summary plan description.

           (5)  None of the Companies maintains, contributes to or has any
      Liability under any funded or unfunded medical, health or life insurance
      plan or arrangement for present or future retirees from such Company
      except as required by COBRA.

           (6)  The Companies do not maintain or contribute to a trust,
      organization or association described in any of sections 501(c)(9),
      501(c)(17)  or 501(c)(20)  of the Code.

           (7)  Favorable determination letters have been received from the
      Internal Revenue Service with respect to each Companies Employee Benefit
      Plan that is intended to comply with the provisions of section 401(a)  of
      the Code, evidencing compliance with the relevant provisions of the Tax
      Equity and Fiscal Responsibility Act 


                                      -8-
<PAGE>   9

     of 1982, the Tax Reform Act of 1984 and the Retirement Equity Act of 1984.
     The Companies' Employee Pension Benefit Plans have been amended on a
     timely basis so as to bring them into compliance with the Tax Reform Act
     of 1986 and other applicable laws and governmental regulations for which
     amendment has been required to be made.

          (8)  To the Knowledge of Oxy, each Companies Employee Benefit Plan
     that is or has been subject to section 412 of the Code, section 302 of
     ERISA or Title IV of ERISA has been terminated.

          (9)  Neither the Companies nor any ERISA Affiliate of the Companies
     presently maintains, contributes to or has any Liability (including
     current or potential withdrawal liability) with respect to any
     "multiemployer plan" as such term is defined in section 3(37) of ERISA.

          (10) To the Knowledge of Oxy, none of the Companies is a party to any
     employment agreement, whether written or oral, or any Companies Employee
     Benefit Plan which contains any provision relating to change in control of
     such Company.

          (11) To Knowledge of Oxy, none of the Companies has guaranteed any
     loan to any Employee or former employee of such Company in, with respect
     to each such Employee or former employee, an amount exceeding $10,000.

          (12) None of the Companies has made or become obligated to make, or
     will, as a result of any event connected with the acquisition of the
     Companies by Nabors or any other transaction contemplated herein, make or
     become obligated to make, any "excess parachute payment" as defined in
     section 280G of the Code (without regard to subsection (b)(4) thereof).

          (13) To the Knowledge of Oxy, there has been no act or omission by
     any of the Companies, or by any current or prior Affiliate of any such
     Company, that would impair in any material respect the right or ability of
     such Company to amend or terminate unilaterally any Companies Employee
     Benefit Plans or to terminate unilaterally, as of the Closing Date, the
     accrual of any benefits after the Closing Date with respect to employees
     or former employees of such Company.

     (k)  ELIGIBILITY FOR SECTION 338(H)(10)  ELECTION.  A consolidated federal
income return with the Parent and the Companies was, or will be, filed for the
current taxable year and the taxable year immediately preceding the current
taxable year, and the Parent is eligible to make an election under 338(h)(10)
of the Code with respect to the Companies.

     (l)  EXISTING PARTNERSHIP.  None of the Companies is subject to any joint
venture, partnership, or other arrangement or Contract which is treated as a
partnership for federal income tax purposes.


                                      -9-
<PAGE>   10



     (m)  BROKERS' FEES. Neither Oxy nor any of the Companies has any Liability
to pay any fees or commissions to any broker, finder or agent with respect to
the transactions contemplated by this Agreement for which Nabors or any of its
Affiliates could become liable or obligated.

     (n)  INVESTMENT INTENT.  Oxy understands and acknowledges that the Warrant
and the Nabors' Common Stock into which the Warrant shall be exercisable have
not been registered under the Securities Act or under the securities laws of
any State.  Oxy (a)  has such business experience that it is capable of
evaluating the merits and risks of its investment in the Warrant and such
Common Stock, and (b)  is acquiring the Warrant for its own account for the
purpose of investment and not with a view to, or for sale or other disposition
in connection with, any distribution thereof, except (a)  in any offering
covered by a registration statement under the Securities Act, or (b)  pursuant
to an applicable exemption under the Securities Act.

     (o)  REGULATED INDUSTRY. None of Oxy or any of the Companies is, with
respect to the businesses of the Companies, subject to regulation under the
PUHCA, the Investment Company Act of 1940, as amended, or the Interstate
Commerce Act, nor is any such Person subject to regulation pursuant to any
rules or regulations promulgated thereunder.  None of Oxy or any of the
Companies is, with respect to such businesses, a "holding company", or a
"subsidiary company" of a "holding company", or an "affiliate" of a "holding
company" or of a "subsidiary company" of a "holding company", or a "public
utility", within the meaning of the PUHCA and the rules and regulations
promulgated thereunder.

     (p)  ACKNOWLEDGMENT CONCERNING NABORS REPRESENTATIONS AND WARRANTIES.  Oxy
acknowledges and affirms that it has had the opportunity to complete its own
independent investigation, analysis and evaluation of Nabors and the business,
assets, liabilities and prospects of Nabors, that Oxy has been afforded the
opportunity to inspect the assets of Nabors, that, in making its decision to
acquire the Warrant, Oxy has relied upon (i)  its own independent investigation,
analysis and evaluation of the businesses, assets, liabilities and prospects of
Nabors, (ii)  the representations and warranties of Nabors set forth in Section
3, and (iii)  the covenants of Nabors set forth in Sections 4 and 5, and in the
Warrant, as a basis for such acquisition, and that Oxy has made all such
reviews and inspections of the foregoing as it has deemed necessary or
appropriate.

     (q)  LIMITATION ON REPRESENTATIONS AND WARRANTIES.

          (1)  Except as and to the extent expressly set forth in this Section
     2, included on any Schedule hereto or included in any writing delivered by
     Oxy to Nabors concurrently herewith or subsequent hereto expressly
     pursuant to this Agreement, Oxy makes no other representation or warranty
     and disclaims all liability and responsibility for any representation,
     warranty, statement or information (financial or otherwise) made or
     communicated (orally or in writing) to Nabors or any of its Affiliates,
     employees,


                                      -10-

<PAGE>   11

     agents, consultants or representatives (including, without limitation, any
     opinion, information, projection, financial statement or advice that may
     have been provided to Nabors by any officer, director, employee, agent,
     consultant or representative of Oxy or of any Affiliate thereof).

          (2)  WITHOUT LIMITING THE GENERALITY OF THE FOREGOING, OXY MAKES NO
     REPRESENTATION, EXPRESS OR IMPLIED, AS TO THE FOLLOWING MATTERS: THE
     MAINTENANCE, REPAIR, CONDITION, QUALITY, SUITABILITY, DESIGN OR
     MARKETABILITY OF, COMPLIANCE WITH ANY LAW APPLICABLE TO, OR TITLE OF ANY
     OF THE COMPANIES TO, ANY OF THE ASSETS, INCLUDING, WITHOUT LIMITATION, ANY
     REPRESENTATION OR WARRANTY AS TO MERCHANTABILITY OR FITNESS FOR ANY
     PARTICULAR PURPOSE OF ANY OF THE ASSETS, IT BEING EXPRESSLY UNDERSTOOD AND
     AGREED BY THE PARTIES THAT NABORS SHALL BE DEEMED TO BE OBTAINING RIGHTS
     IN THE ASSETS IN THEIR PRESENT STATUS, CONDITION AND STATE OF REPAIR, "AS
     IS" AND "WHERE IS".

          (3)  Oxy makes no representation or warranty to Nabors regarding the
     probable success or profitability of the Companies, or of any of the
     assets of any the Companies.

     3.   REPRESENTATIONS AND WARRANTIES OF NABORS. Nabors represents and
warrants to Oxy that:

     (a)  ORGANIZATION OF NABORS.  Nabors is a corporation duly incorporated,
validly existing and in good standing under the laws of Delaware.

     (b)  AUTHORIZATION OF TRANSACTION BY NABORS.  Nabors has all requisite
corporate power and authority to execute and to deliver this Agreement and the
Warrant, to perform its obligations hereunder and thereunder and to consummate
the transactions contemplated hereby and thereby.  The execution and delivery
by Nabors of this Agreement and the Warrant and the consummation by Nabors of
the transactions contemplated hereby and thereby have been duly authorized by
all necessary corporate action on the part of Nabors.  This Agreement has been
duly executed and delivered by Nabors and constitutes the legally valid and
binding obligation of Nabors, enforceable against Nabors in accordance with its
terms, except as enforceability is limited by applicable bankruptcy,
insolvency, reorganization, moratorium or similar laws affecting creditors'
rights generally and equitable principles (whether applied in a court of law or
equity).  The Warrant, when executed and delivered by Nabors, will constitute
the legally valid and binding obligation of Nabors, enforceable against Nabors
in accordance with its terms, except as enforceability is limited by applicable
bankruptcy, insolvency, reorganization, moratorium or similar laws affecting
creditors' rights generally and equitable principles (whether applied in a
court of law or equity).  Nabors is not obligated to give any notice to, to
make any filing or registration with, or to obtain any authorization, consent,



                                      -11-
<PAGE>   12

approval or order of, any Governmental Authority or any other Person in
connection with the execution, delivery or performance by Nabors of this
Agreement or the Warrant or the consummation by Nabors of the transactions
contemplated by this Agreement or the Warrant, other than (i)  compliance with
the applicable requirements of the Hart-Scott-Rodino Act, (ii)  as set forth on
Schedule 3(b), (iii)  filings with federal or state securities commissions in
connection with the transactions contemplated by the Warrant, (iv)  filings with
Governmental Authorities in the Ordinary Course of Business of Nabors that are
not required to be made prior to the consummation of the transactions
contemplated hereby, and (v)  such authorizations, consents, approvals or orders
that, if not obtained, and such notices, filings or registrations that, if not
made, would not, individually or in the aggregate, have (A)  a Material Adverse
Effect with respect to Nabors, or (B)  any adverse effect on the ability of
Nabors to perform this Agreement or the Warrant.

     (c)  POWER AND AUTHORITY OF NABORS. Nabors has all requisite corporate
power and authority to own, lease and operate its properties and to carry on
the business in which it is engaged and is duly qualified to do business in
each jurisdiction in which the nature of the business conducted by it or the
ownership or leasing of its properties makes such qualification necessary,
except where the failure to be so qualified would not result, individually or
in the aggregate, in a Material Adverse Effect with respect to Nabors. No
dissolution, liquidation or bankruptcy proceeding is pending, contemplated or
threatened against Nabors. Nabors has delivered to Oxy correct an complete
copies of the charter and bylaws of Nabors (in each case as amended to date),
and all of such documents are in effect and are complete.

     (d)  CAPITALIZATION OF NABORS.  As of the date hereof, the authorized
capital stock of Nabors consists of 200,000,000 shares of the Nabors Common
Stock, 10,000,000 shares of Nabors Preferred Stock, and 8,000,000 shares of
Nabors Class B Stock.   As of February 29, 1996, 84,939,540 shares of the
Nabors Common Stock were issued and outstanding, and no shares of the Nabors
Preferred Stock or the Nabors Class B Stock were issued and outstanding. As of
the date hereof, (i)  1,000,000 shares of the Nabors Common Stock were reserved
for issuance upon the exercise of Warrant, (ii)  20,659,220 shares of the Nabors
Common Stock were reserved for issuance pursuant to option and employee benefit
plans, and (iii)  2,600,000 shares of the Nabors Common Stock were reserved for
issuance pursuant to the terms of certain transactional documents entered into
pursuant to transactions with third parties. All of the issued and outstanding
shares of the capital stock of Nabors have been duly authorized and are validly
issued, fully paid and nonassessable, and no shares of the capital stock of
Nabors are subject to, nor have they been issued in violation of, preemptive
rights.  The Warrant, when executed and delivered by Nabors, will have been
duly authorized and validly issued and will not be subject to, nor issued in
violation of, preemptive rights.  Except as referred to above, there are
outstanding (a)  no Equity Securities of Nabors, and  (b), except for the
obligations of (1)  Oxy and Nabors pursuant to this Agreement, and (2)  Nabors
pursuant to the Warrant, no options or other rights to acquire from Nabors, and
no obligations of Nabors to issue or sell, any Equity Securities of Nabors.
Except for the arrangements or agreements set forth on Schedule 3(d), there are
no outstanding obligations of Nabors to repurchase, redeem or otherwise acquire


                                      -12-
<PAGE>   13

any shares of its capital stock.  There is no agreement or arrangement
restricting the voting or transfer of any of the Equity Securities of Nabors.
Except as contemplated by the Warrant or as set forth on Schedule 3(d), there
are no agreements or arrangements to which Nabors is a party pursuant to which
Nabors is or could be required to register shares of the Nabors Common Stock
under the Securities Act.

     (e)  LEGAL COMPLIANCE; NONCONTRAVENTION. No action, suit, proceeding,
hearing, investigation, charge, complaint, claim, demand or notice seeking to
restrain, prohibit or obtain damages or other relief in connection with this
Agreement or the transactions contemplated hereby has been filed or commenced
against Nabors, and, to the knowledge of Nabors, no such action, suit,
proceeding, hearing, investigation, charge, complaint, claim, demand or notice
has been threatened to be so filed or so commenced. Except as set forth in
Schedule 3(e), the execution and delivery of this Agreement and the Warrant by
Nabors does not, and the performance of this Agreement and the Warrant by
Nabors will not, (i) conflict with, or violate, the certificate of
incorporation or bylaws of Nabors, (ii) conflict with, or violate, any Law in
effect as of the date of this Agreement and applicable to Nabors or by which
any of the properties of Nabors are bound or affected, or (iii) result in any
breach of, or constitute a default (or an event that with notice or lapse of
time or both would become a default) under, or give to any Person (other than
Nabors) any right of termination, amendment, acceleration or cancellation of,
or require payment under, or result in the creation of any Lien on any of the
properties or assets of Nabors pursuant to, any note, bond, mortgage,
indenture, Contract, lease, license, Permit, franchise or other instrument or
obligation to which Nabors is a party or by which any of the properties of
Nabors are bound or affected, except, in the case of clauses (ii) and (iii)
above, for such breaches, defaults, events, rights of termination, amendment,
acceleration or cancellation, payment obligations or Liens that would not,
individually or in the aggregate, have a Material Adverse Effect with respect
to Nabors.

     (f)  SEC FILINGS OF NABORS.  Nabors has delivered to Oxy accurate and
complete copies of (i)  the Annual Report on Form 10-K of Nabors for the fiscal
year ended September 30, 1995, (ii)  its Quarterly Report on Form 10-Q for the
quarterly period ended December 31, 1995, (iii)  its Proxy Statement for its
last Annual Meeting of Shareholders, and (iv)  its Current Reports on Form 8-K
as filed since September 30, 1995, in each case in the form filed by Nabors
with the Securities and Exchange Commission (together, the "Nabors Reports").
The Nabors Reports are the only reports, schedules, forms, statements and other
documents required by the Exchange Act to be filed by Nabors with the
Securities and Exchange Commission since September 30, 1995.  None of the
Nabors Reports, including, without limitation, any financial statements or
schedules included therein, at the time filed, contained any untrue statement
of a material fact or omitted to state any material fact required to be stated
therein or necessary in order to make the statements contained therein, in
light of the circumstances under which they were made, not misleading.  The
audited consolidated financial statements and unaudited consolidated interim
financial statements of Nabors (together the "Nabors Financial Statements")
included in such reports present fairly, in conformity in all material respects
with GAAP (except as may be indicated in the notes thereto and except that
certain information and disclosure normally included in notes to consolidated
financial statements have been condensed 



                                     -13-
<PAGE>   14

or omitted from the unaudited consolidated interim financial statements
pursuant to rules and regulations of the Securities and Exchange Commission,
but any resultant disclosures are in accordance with GAAP as they apply to
interim reporting), the consolidated financial position of Nabors as of the
dates thereof and its consolidated results of operations and cash flows for the
periods then ended (subject to normal year-end audit adjustments in the case of
any unaudited interim financial statements).

     (g)  MATERIAL ADVERSE EFFECT.  Since December 31, 1995, other than as
described in the Nabors Reports, no event has occurred, or condition exists,
which would constitute or cause, individually or in the aggregate, a Material
Adverse Effect with respect to Nabors.

     (h)  BROKERS' FEES. Nabors does not have any Liability to pay any fees or
commissions to any broker, finder or agent with respect to the transactions
contemplated by this Agreement for which Oxy or any of its Affiliates could
become liable or obligated.

     (i)  INVESTMENT. Nabors is acquiring the Stock for its own account for the
purpose of investment and not with a view to, or for sale or other disposition
in connection with, any distribution thereof, except (i) in an offering covered
by a registration statement the Securities Act, or (ii) pursuant to an
applicable exemption under the Securities Act.

     (j)  ABILITY TO PAY. Nabors has available sufficient funds to pay the Cash
Portion of the Purchase Price, together with all costs and expenses relevant
thereto, and otherwise to perform its obligations under this Agreement and the
Warrant.

     (k)  EMPLOYEE BENEFIT MATTERS.  With respect to each of Nabors' Employee
Benefit Plans, Nabors has delivered to Oxy true and complete copies of (i)  all
plan documents, including any related trust agreements, insurance contracts or
other funding arrangements, or a written summary of the terms and conditions of
the plan if there is not a written plan document; (ii)  the most recent
determination letter received from the Internal Revenue Service (where
applicable); (iii)  the most recent IRS Series 5500 Form; (iv)  the most recent
financial statements (where applicable); and (v)  the most recent summary plan
description.

     (l)  REGULATED INDUSTRY. Nabors is not subject to regulation under the
PUHCA, the Investment Company Act of 1940, as amended, or the Interstate
Commerce Act, nor is Nabors subject to regulation pursuant to any rules or
regulations promulgated thereunder.  Nabors is not a "holding company", or a
"subsidiary company" of a "holding company", or an "affiliate" of a "holding
company" or of a "subsidiary company" of a "holding company", or a "public
utility", within the meaning of the PUHCA and the rules and regulations
promulgated thereunder.

     (m)  ACKNOWLEDGMENT CONCERNING OXY REPRESENTATIONS AND WARRANTIES.  Nabors
acknowledges and affirms that it has had the opportunity to complete its own
independent investigation, analysis and evaluation of the Companies and the
respective 



                                     -14-
<PAGE>   15

businesses, assets, liabilities and prospects of the Companies, that Nabors has
been afforded the opportunity to inspect the assets of the Companies, that any
prior financial information delivered by Oxy or any of its Affiliates to Nabors
will be superseded by the Financial Statements, that, in making its decision to
enter into this Agreement and to consummate the transactions contemplated
hereby, Nabors has not relied upon such financial statements but upon (i) its
own independent investigation, analysis and evaluation of the businesses,
assets, liabilities and prospects of the Companies, (ii) the representations
and warranties of Oxy set forth in Section 2, and (iii) the covenants of Oxy
set forth in Sections 4 and 5, as a basis for entering into this Agreement and
the consummation of such transactions, and that Nabors has made all such
reviews and inspections of the foregoing as it has deemed necessary or
appropriate.

     (n)  LIMITATION ON REPRESENTATIONS AND WARRANTIES.

          (1)  Except as and to the extent expressly set forth in this Section
     3, included on any Schedule hereto or included in any writing delivered by
     Nabors to Oxy concurrently herewith or subsequent hereto expressly
     pursuant to this Agreement, Nabors makes no other representation or
     warranty and disclaims all liability and responsibility for any
     representation, warranty, statement or information (financial or
     otherwise) made or communicated (orally or in writing) to Oxy or any of
     its Affiliates, employees, agents, consultants or representatives
     (including, without limitation, any opinion, information, projection,
     financial statement or advice that may have been provided to Oxy by any
     officer, director, employee, agent, consultant or representative of Nabors
     or of any Affiliate thereof).

          (2)  Nabors makes no representation or warranty to Oxy regarding the
     probable success or profitability of Nabors.

     4.   PRE-CLOSING COVENANTS. The Parties agree as follows with respect to
the period between the execution of this Agreement and the Closing:

     (a)  GENERAL.  Each of the Parties shall refrain, and shall cause each of
its Affiliates to refrain, from taking any action that would (i)  prevent or
invalidate the consummation of the transactions contemplated by this Agreement,
or (ii)  cause this Agreement or the transactions contemplated hereby to violate
any Law.  Each of the Parties shall endeavor in good faith to cause the
conditions (a)  to its obligations to close, and (b)  to the obligations of the
other Party to close, to be fulfilled at or prior to the Closing.

     (b)  NOTICES AND CONSENTS. Oxy will give any notices to third parties, and
will use all reasonable commercial efforts to obtain all third-party consents,
that are required for the consummation of the transactions contemplated hereby.
Nabors will give any notices to third parties, and will use all reasonable
commercial efforts to obtain any third-party consents, that Oxy may reasonably
request.  Each of the Parties will (and Oxy will cause each of the Companies
to)  give any notices to, make any filings with, and use all reasonable
commercial 



                                     -15-
<PAGE>   16

efforts to obtain any authorizations, consents and approvals of Governmental
Authorities in connection with the matters referred to in Sections 2(b) and
3(b). Without limiting the generality of the foregoing, each of the Parties
will file any Notification and Report Forms and related material that such
Party may be required to file with the Federal Trade Commission and the
Antitrust Division of the United States Department of Justice under the
Hart-Scott-Rodino Act, will use all reasonable commercial efforts to obtain an
early termination of the applicable waiting period, and will make any further
filings pursuant thereto that may be necessary, proper or advisable in
connection therewith; provided, however, that each of the Parties shall retain
any rights which it may have to contest any request for information that it
reasonably deems to be irrelevant or in excess of any Law.

     (c)  OPERATION OF BUSINESS.  From and after the date of this Agreement and
prior to the Closing, except (i)  as otherwise provided in this Agreement, (ii)
pursuant to any Law, or (iii)  with the prior written consent of Nabors (which
consent will not be unreasonably withheld or delayed), (x)  Oxy will cause each
of the Companies to use reasonable commercial efforts to:

          (1)  operate its business only in the Ordinary Course of Business of
     such Company;

          (2)  preserve, in all material respects and consistent with past
     custom and practice, its business and properties, including its present
     operations, physical facilities, working conditions and relationships with
     Persons having significant business relations with it, including, without
     limitation, suppliers and customers;

          (3)  maintain and keep, in all material respects, its Assets in as
     good repair and condition as at present, ordinary wear and tear excepted;
     and

          (4)  keep in full force and effect insurance and bonds comparable in
     amount and scope of coverage to that currently maintained; and

     (y)  Oxy shall cause each of the Companies not to:

          (a)  enter into any Contract outside the Ordinary Course of Business
     of such Company;

          (b)  make any declaration, setting aside or payment of dividends or
     distributions in respect of any shares of its capital stock or any
     redemption, purchase or other acquisition of any of its securities;

          (c)  create, or permit the creation of, any Lien upon any of the
     Assets of such Company, outside the Ordinary Course of Business of such
     Company;



                                     -16-
<PAGE>   17

          (d)  enter into any employment contract or collective bargaining
     agreement, or modify the terms of any existing such contract or
     agreement;

          (e)  establish any new Employee Benefit Plan of such Company, or
     modify or terminate any existing Employee Benefit Plan of the Company;

          (f)  increase or otherwise modify (except (i) as contemplated by this
     Agreement, and (ii) for the payment of benefits under the Bonus Plans (to
     the extent applicable to management) and under the Profit Sharing Plans,
     representing amounts accrued but unpaid prior to the Closing) the
     compensation of its Employees, including salaries, bonus and other
     employee benefits, including severance payments;

          (g)  sell, lease, transfer or assign any Assets with a Fair Market
     Value of $25,000 or more, or Assets with an aggregate Fair Market Value
     of $100,000 or more, in each case tangible or intangible;

          (h)  make any capital expenditures other than in the Ordinary Course
     of Business of such Company, or make any capital expenditures for any
     single item in excess of $50,000, except as necessary in an emergency
     situation, provided that Oxy shall, or shall cause such Company to, give
     to Nabors notice as soon as reasonably possible of such emergency
     situation;

          (i)  except for (i) borrowings under existing credit facilities, or
     (ii) intercompany indebtedness or obligations owed to Oxy or to any
     Affiliate of Oxy, in each case in the Ordinary Course of Business of such
     Company, incur any obligation for borrowed money or purchase money
     indebtedness;

          (j)  make any significant change in the accounting methods,
     principles or practices of such Company, except to conform to accepted
     industry practice;

          (k)  enter any new bids for turnkey or footage drilling Contracts
     (where the total direct job costs are expected to exceed $350,000 or the
     job is expected to take more than 30 days to complete), provided that
     Nabors agrees to notify such Company of Nabors' decision with regard to
     turnkey or footage bids within two Business Days after such Company shall
     notify Nabors of the desire of such Company to bid on such a contract;

          (l)  amend, or renew, either of the International Contracts, or enter
     into any Contract involving operations outside of the United States;

          (m)  hire any Person as a Salaried Employee; or

          (n)  enter into any agreement to do any of the foregoing.



                                     -17-
<PAGE>   18

     (d)  CONSENTS UNDER SECTION 4(C). For any matter for which Oxy shall
request the consent of Nabors under Section 4(c), Oxy shall give written notice
to Nabors designating such matter in reasonable detail and requesting consent
under Section 4(c). Except as provided in clause (k) of Section 4(c), within
five Business Days of receipt of any notice given by Oxy under this Section
4(d), Nabors shall grant or withhold its consent by giving written notice to
Oxy or by giving telephonic notice to Oxy, promptly thereafter confirmed by
written notice.

     (e)  FULL ACCESS.  Oxy will permit representatives of Nabors to have full
access at reasonable times during normal business hours, in a manner that will
not interfere with the normal business operations of the Companies, to all
premises, properties, personnel, books, records (including Tax records),
contracts, and documents of, or pertaining to, the Companies; provided,
however, that such access shall not operate to cause (i)  a waiver of any
attorney-client, work product or like privilege, or (ii)  a waiver or breach of
any other obligation of confidentiality.  Nabors will furnish to Oxy, promptly
after filing, copies of all reports, schedules, forms, statements and other
documents filed by Nabors with the Securities and Exchange Commission.

     (f)  NOTICE OF BREACH.  Each Party will give prompt written notice to the
other Party of any event, fact or condition which constitutes a material breach
by the first Party of any of its representations, warranties or agreements set
forth in this Agreement.

     (g)  NO SHOPPING.  From and after the date of this Agreement until the
earlier of (i)  the Closing, or (ii)  the termination of this Agreement in
accordance with its terms, Oxy shall, and shall cause each of the Companies to,
refrain from taking any action, directly or indirectly, through any officer,
director, employee, agent or representative, to solicit or knowingly encourage,
including by way of furnishing information, the initiation of any inquiries or
proposals regarding, or engage in any discussions or enter into any agreements
regarding, any merger, tender offer, sale of shares of capital stock or similar
business combination transactions involving the Companies, or any sale of all
or substantially all of the Assets.

     (h)  INSURANCE MATTERS.  Oxy shall deliver to Nabors, not later than five
Business Days prior to the Closing, a statement (i)  setting forth a summary
description of all policies, binders and contracts of insurance (other than
real estate title insurance)  then in force and providing coverage for the
Companies, and (ii)  identifying which of such policies, binders and contracts
are Owned by the Companies.  At the request of Nabors, Oxy shall cause each of
the Companies to use its reasonable efforts to obtain an endorsement on each
such policy which is Owned by any of the Companies naming Nabors and its
Affiliates as additional insureds effective on the Closing Date.  No other
policy, binder or contract of insurance which is currently in force and
providing coverage for the Companies will cover the assets or businesses of any
of the Companies after the Closing.  After the Closing, Oxy or its
representatives may issue a cancellation notice with respect to any document
evidencing insurance then outstanding under each policy which is Owned by Oxy
or any of its Affiliates (other than the Companies).



                                     -18-
<PAGE>   19

     (i)  NO INTERCOMPANY DEBT OR OBLIGATION.   Oxy shall take steps to ensure
that, as of the Closing Date, (i) the Companies shall have no intercompany
indebtedness or obligations of any kind owed to Oxy or to any Affiliate of Oxy,
and (ii) the Companies shall have no funded debt obligations for borrowed money
owed to any Person.

     (j)  FINANCIAL STATEMENTS.  Oxy shall deliver to Nabors, not later than the
Closing, the Financial Statements.  Except as noted in the Financial
Statements, the Financial Statements (including the notes thereto)  shall be
prepared in accordance with GAAP applied on a consistent basis throughout the
period covered thereby, will be consistent with the books and records of the
Companies, and will present fairly, in all material respects, the financial
position, results of operations and cash flows of the Companies for such
period.

     (k)  BANKING ARRANGEMENTS OF THE COMPANIES.  Oxy shall deliver to Nabors,
not later than the Closing, a statement listing (i) the name of each bank or
other financial institution in which any of the Companies has an account of any
type or safe deposit box and the number of each such account or safe deposit
box, and (ii) the names of all Persons having authorization to draw thereon or
having access thereto.

     (l)  SALARIED EMPLOYEES. Oxy shall cause (i) all Salaried Employees of
Exeter (other than toolpushers) and whose principal place of employment is in
Denver, Colorado, Houston, Texas, Oklahoma City, Oklahoma, or Midland, Texas,
and (ii) not less than four additional Salaried Employees of any of the
Companies (other than toolpushers) whose principal place of employment is at
any other location to be terminated as Employees prior to the Closing, the
selection of such Salaried Employees to be at the sole discretion of the
Companies or Oxy. Prior to the Closing, Oxy shall cause the Companies not to
transfer the location of employment of any Salaried Employee (other than
toolpushers) whose principal place of employment is in any of the locations
referred to in clause (i) of this Section 4(l).

     (m)  SUBSTITUTION OF UNDERTAKINGS.  Nabors shall use all reasonable
commercial efforts to (i) substitute, as of the Closing Date, the Commitment of
Nabors for all Commitments of Oxy or any of its Affiliates (other than the
Companies) (other than any such Commitment pertaining to any Liability with
respect to which Oxy shall have indemnified Nabors pursuant to the provisions
of Section 7(b)(ii)) to (a) any Governmental Authority in support of (1) any
Permit affecting any of the Companies or their respective Assets, or (2) any
agreement or contract between any of the Companies and any Governmental
Authority, (b) any financial institution providing an undertaking to either a
Governmental Authority or a Person that is a party to any agreement or contract
with any of the Companies, and (c) any other Person that is a party to any
agreement or contract with any of the Companies, or (ii) otherwise arrange for
the release of Oxy or any such Affiliate from any such Commitment. Oxy shall
deliver to Nabors, not later than 10 calendar days prior to the Closing, a list
of each such Commitment. Nabors shall reimburse Oxy for, and shall indemnify
and hold Oxy harmless from and against any liability, cost or expense relating
to, (A) any payment made in accordance with any such Commitment for which
Nabors does not substitute its Commitment 



                                     -19-
<PAGE>   20

in accordance with the provisions of this Section 4(m), except to the extent
that such payment relates to the period prior to the Closing, and (B) any costs
and expenses incurred by Oxy or any of its Affiliates after the Closing in
maintaining any such Commitment.

     (n)  EXCLUDED ASSETS.  Prior to the Closing, Oxy shall cause each of the
Companies to assign or transfer to Oxy or its designee all Excluded Assets and
all Assets that are treated as Excluded Assets pursuant to the provisions of
Section 1(j), and any such assignment or transfer shall be permitted without
the consent of Nabors notwithstanding the provisions of Section 4(c); provided,
however, that, if any such assignment or transfer shall be prohibited without
the consent of a third party and such consent shall not have been obtained
prior to the Closing, then (i) such assignment or transfer shall not be
completed prior to the Closing, (ii), from and after the Closing, Nabors will
use all reasonable commercial efforts to obtain such third-party consent,
(iii), if Nabors obtains such third-party consent, Nabors will cause the
Company which shall Own such Excluded Asset or Asset to transfer such Excluded
Asset or Asset to Oxy or its designee for no additional consideration to such
Company, Nabors or any of its Affiliates pursuant to a deed or other assignment
document reasonably acceptable to Oxy and Nabors, and (iv) Oxy shall indemnify
Nabors and its Affiliates from and against any Liability (other than any
Liability arising out of any action of Nabors, any of its Affiliates or any of
the Companies from and after the Closing) arising out of (A) the ownership of
such Excluded Asset or Asset, and (B) any such transfer.

     (o)  WHEELS LEASE.  Prior to the Closing, Nabors and Oxy shall use all
reasonable commercial efforts (i) to obtain all requisite consents from Wheels,
Inc. for the assignment or transfer to Nabors of all rights and obligations
with respect to that portion of the Wheels Lease that relates to the Vehicles
Owned by the Companies as of the Closing, (ii) to have Nabors enter into a new
lease agreement whereby Nabors shall assume all Liability arising from and
after the date of such lease agreement with respect to the Vehicles, and (iii)
to have Wheels, Inc. release Oxy, OPC and any of its Affiliates from any
Liability from and after the date of such release with respect to the Vehicles.
In the event that, on or prior to the Closing Date, the requisite consent for
such transfer is not obtained, and Nabors does not execute a new lease
agreement with Wheels, Inc., Oxy and OPC shall, at the Closing, assign their
rights to the Vehicles under the Wheels Lease to Nabors, and Nabors shall, by
an instrument in writing, indemnify Oxy and OPC from and against any Liability
arising from and after the Closing Date with respect to the Vehicles or
resulting from, or arising out of, such assignment. Such assignment shall cover
the Vehicles only for the remaining term of the Wheels Lease.

     (p)  NEGOTIATION REGARDING ALTERNATIVE CONSIDERATION.  Prior to the
Closing, Nabors and Oxy shall negotiate in good faith to enter into, prior to
the Closing, an amendment to this Agreement to provide for (i) the delivery by
Nabors to Oxy, at the option of Nabors and at the Closing, in lieu of the
Warrant and as a part of the Consideration, a number of shares of the Nabors
Common Stock equal to the number obtained by dividing $4,000,000 by the Average
Closing Price, and (ii) such other terms and conditions with respect to such
shares and the issuance thereof (including terms with respect to registration



                                     -20-
<PAGE>   21

rights) as may be mutually acceptable to Nabors and Oxy; provided, however,
that any failure to enter into any such agreement shall not (1) constitute a
breach or failure to perform any representation, warranty, covenant or
agreement under this Agreement, or (2) any failure of any condition set forth
in Section 6(a) or 6(b), in each case for all purposes of this Agreement.

     5.   POST-CLOSING COVENANTS. The Parties agree as follows with respect to
the period following the Closing.

     (a)  GENERAL.  In case, at any time after the Closing, any further action
is necessary or desirable to consummate or implement the transactions
contemplated by this Agreement, each of the Parties will take such further
action (including, without limitation, the execution and delivery of such
further instruments and documents) as the other Party may reasonably request;
provided, however, that this Section 5(a) shall not be deemed to require either
Party to expend funds or to incur obligations not otherwise expressly required
pursuant to this Agreement.

     (b)  INSURANCE CLAIMS AND RECEIVABLES.  During the period commencing at the
Closing and ending 125 calendar days after the Closing, Nabors shall cause each
of the Companies to use reasonable commercial efforts (i) to collect all
insurance claims, accounts receivable or other receivables which were owed by
any Person (other than Oxy or any of its Affiliates) to any of the Companies at
the Closing, and (ii) to allocate all monies remitted by any such Person to
Nabors, any of its Affiliates or any such Company, and received by Nabors, any
of its Affiliates or any such Company, during such period to the appropriate
invoice or invoices. To the extent that, on the date which shall be 120
calendar days following the Closing Date (or the next Business Day if such date
is not a Business Day), any of such insurance claims, accounts receivable or
other receivables shall not have been collected by Nabors, the Companies or any
such Affiliate, such claims and receivables shall, upon the request of Oxy, be
assigned to Oxy or its designee by the Person to which such claim or receivable
shall at the time be owing, all without payment of any further consideration to
Nabors or any such Person. During the period commencing at the Closing and
ending on the date upon which such claims and receivables shall be so assigned
to Oxy, representatives of Oxy or any of its Affiliates may assist the
Companies in the collection of any such claims and receivables, and Nabors
shall cause the Companies to provide to such representatives all appropriate
billing and other records, and to otherwise cooperate with such
representatives, in connection with such collection

     (c)  BOOKS AND RECORDS.

          (1)  INSPECTION. Each Party agrees that, for a period of five years
following the Closing Date, such Party shall take all necessary action to
ensure that (i) all corporate books and records of the Companies or pertaining
to the Assets with respect to periods ending on or before the Closing Date and
in the possession or control of such Party or any of its Affiliates shall be
open for inspection by representatives of the other Party at any time during
regular



                                     -21-
<PAGE>   22

business hours, and (ii) such other Party may during such period at its expense
make such excerpts therefrom as it may reasonably request.

          (2)  DESTRUCTION AND COOPERATION. For a period of five years
following the Closing Date (or for such longer period as may be required by
Law), no Party or any of its Affiliates shall destroy or give up possession of
any original or any copy of any of the books and records relating to any matter
for which a Party shall have any continuing responsibility under this Agreement
without first offering to the other Party the opportunity, at its expense, to
obtain such original or a copy thereof. During such period, each Party shall
use its best efforts to cooperate with the other Party and make available such
records and books to the employees and representatives of such Party to the
extent that such Party may reasonably require for its corporate and other
business purposes (including, without limitation, attendance at depositions or
legal proceedings, or audits requested by such Party to be performed by such
Party's independent accountants for any period through the Closing Date).

     (d)  OXY TRADENAMES OR TRADEMARKS.  Within 120 days after the Closing,
Nabors shall cause each of the Companies to eliminate the word "Occidental" or
"Oxy", or any word or expression similar thereto, from the names under which
Nabors or the Companies do business.  As promptly as practicable after the
Closing, the word "Occidental" or "Oxy", or any word or expression similar
thereto, shall be removed from the respective property, stationery and
literature of the Companies, and, thereafter, neither Nabors or the Companies
nor any Affiliate of any thereof shall use any such logo or name belonging to
Oxy or any of its Affiliates.

     (e)  COVENANTS REGARDING EMPLOYEES AND EMPLOYEE BENEFIT PLANS.

     (1)  Effective as of the Closing Date, Nabors shall cause the Companies or
any of their Affiliates to continue to employ each Salaried Employee (except
each of the Salaried Employees who shall be terminated pursuant to the
provisions of Section 4(l)) at the same level of salary or wages and in a
comparable job or function as prior to the Closing. In the event that any of
the Companies or their Affiliates shall terminate any Salaried Employee who was
eligible to participate in the Severance Program (other than "for cause" (i.e.
misconduct or failure to perform properly the duties of such Salaried
Employee)) after the Closing and on or prior to September 30, 1996, Nabors
shall, or shall cause such Company to, pay to such Salaried Employee severance
benefits not less than those severance benefits provided under the Severance
Program.

     (2)  As of the Closing, Nabors shall, or shall cause the Companies to,
provide the Employees with retirement, savings, medical, dental, life,
long-term disability, short-term disability, vacation, severance pay and other
benefits comparable in type and aggregate value to those provided either (i) to
such Employees by the Companies immediately prior to Closing, or (ii) by Nabors
pursuant to the benefit plans and arrangements which shall be in effect on the
Closing Date with respect to comparable employees of Nabors.



                                     -22-
<PAGE>   23

     (3)  Each of the Employees on the Closing Date who shall be eligible to
participate in the Nabors' or the Companies' Employee Welfare Benefit Plans
shall participate in such plans as of and from the Closing Date. Each of the
Employees and their eligible dependents who are participants in the Companies'
medical or dental care plans, as applicable immediately prior to the Closing,
shall be deemed to satisfy following the Closing any pre-existing condition
limitations under group medical, dental, life insurance or disability plans
that shall be part of Nabors' or the Companies' Employee Benefit Plans to the
same extent as such pre-existing condition limitations were satisfied
immediately prior to the Closing, and amounts paid by such Employees in
calendar year 1996 towards deductibles and copayment limitations under the
Companies' medical and dental plans immediately prior to the Closing shall be
counted toward meeting following the Closing any similar deductible and
copayment limitations under the Nabors' or the Companies' medical and dental
plans that shall be part of such benefit plans after the Closing, provided that
no such amounts shall be due or refunded to Employees.

     (4)  Nabors shall recognize, or cause the Companies to recognize, all
service credited for each of the Employees on the Companies' records for
purposes of eligibility for participation and vesting under the Nabors' or the
Companies' Employee Benefit Plans and the level of benefits under such plans
but specifically excluding any benefit accrual under any Employee Benefit Plan
of Nabors that is a defined benefit plan.

     (5)  From and after the Closing, the Employees shall be entitled to retain
and take any paid vacation days accrued but not taken under the Companies'
vacation policies prior to the Closing, provided that such vacation days are
taken, or paid in lieu of being taken, on or before September 30, 1996.

     (6)  Nabors, the Companies and Oxy agree to furnish each other with
appropriate records for each of the Employees as may be necessary to assist in
proper benefit administration.

     (7)  Nothing expressed or implied in this Agreement shall confer upon any
Employee, or legal representative thereof, any rights or remedies, including,
without limitation, any right to employment whether directly or as a third
party beneficiary, or continued employment for any specified period, of any
nature or kind whatsoever.

     (8)  Nabors shall, to the extent set forth in Section 7(c), hold Oxy and
its Affiliates harmless (i) from all claims by any Employee who shall continue
employment with the Companies, Nabors or any of its Affiliates after the
Closing but whom Nabors or any member of its Affiliated Group shall thereafter
terminate, or by any spouse, dependent, estate or other beneficiary or
representative of such Employee, and (ii) from any claims or charges by, or
relating to, any such Employee concerning wrongful termination, discrimination
or harassment, or violation of any Law, including, without limitation, (a) the
Fair Labor Standards Act, (b) the Labor Management Relations Act, (c) the
Workers Adjustment and



                                     -23-
<PAGE>   24
Retraining Notification Act, (d) the Americans With Disabilities Act, (e)
ERISA, (f) COBRA, (g) the National Labor Relations Act, (h) the Family and
Medical Leave Act, and (i) Title VII of the Civil Rights Act of 1964, all as
attributable to the conduct of Nabors or any member of its Affiliated Group
with respect to such Employee relating to the period subsequent to the Closing.

     (9)  Oxy shall, to the extent set forth in Section 7(b), hold Nabors and
its Affiliates harmless (i) from all claims by any Employee or former employee
terminated by any of the Companies prior to the Closing, or by any spouse,
dependent, estate or other beneficiary or representative of such Employee or
former employee, and (ii) from any claims or charges by, or relating to, any
such Employee or former employee concerning wrongful termination,
discrimination or harassment, or violation of any Law, including, without
limitation, (a) the Fair Labor Standards Act, (b) the Labor Management
Relations Act, (c) the Workers Adjustment and Retraining Notification Act, (d)
the Americans With Disabilities Act, (e) ERISA, (f) COBRA, (g) the National
Labor Relations Act, (h) the Family and Medical Leave Act, and (i) Title VII of
the Civil Rights Act of 1964, all as attributable to the conduct of the
Companies or any member of its Affiliated Group with respect to the Employees
or former employees of the Companies relating to the period prior to the
Closing.

     (f)  LITIGATION SUPPORT.  In the event and for so long as any Party
actively is contesting or defending against any action, suit, proceeding,
hearing, investigation, charge, complaint, claim or demand in connection with
(i) any transaction contemplated by this Agreement, or (ii) any fact,
situation, circumstance, status, condition, activity, practice, occurrence,
event, incident, action, failure to act, or transaction on or prior to the
Closing Date and involving the Companies, the other Party will cooperate with
such Party and its counsel in such contest or defense, make available the
personnel of such other Party, and provide such testimony and access to its
books and records as shall be necessary in connection with such contest or
defense, all at the sole cost and expense of the contesting or defending Party
(unless the contesting or defending Party is entitled to indemnification
therefor under Section 7).

     (g)  COVENANTS REGARDING TAXES.

          (1)  ELECTION PURSUANT TO SECTION 338(H)(10) OF THE CODE. Nabors and
Oxy shall cooperate to take, or cause to be taken, and shall take, or cause to
be taken, all actions necessary and appropriate to effect a timely proper
election under Section 338(h)(10) of the Code and the Treasury Regulations
promulgated thereunder and, to the extent possible, to make similar elections
for state income tax purposes. Oxy and Nabors shall comply fully with all
filing and other requirements necessary to effectuate such elections on a
timely basis and agree to cooperate in good faith with each other in the
preparation and timely filing of any Tax Returns required to be filed in
connection with the making of such elections, including the exchange of
information and the joint preparation and delivery to each other of Form 8023-A
(including related schedules) not later than 90 calendar days after any
agreement with respect to, or final determination of, the Cash Portion of the
Purchase Price pursuant to Section 1(h), or, in any case, not later than the
due date of such form, and the 



                                     -24-
<PAGE>   25

filing of such form and related schedules with their respective income Tax
Returns in the time and manner prescribed by law. The Parties shall allocate
the Purchase Price, as adjusted, with respect to the assets of the Companies
among Classes I, II, III and IV in accordance with Treasury Regulation sections
1.338(b)-2T(b)(1) and (2) and 1.1060-1T(d)(1) and (2). The portion of the
Purchase Price, as adjusted, allocable to the assets of the Companies falling
within Class III of Treasury Regulations referred to above shall be agreed upon
by Oxy and Nabors, and such allocations shall be binding on the Parties with
regards to income Taxes.

          (2)  ALLOCATION BETWEEN PARTIAL PERIODS. Except as provided below,
any real and personal property taxes, ad valorem taxes and franchise taxes for
the tax period commencing prior to the Closing Date and ending after the
Closing Date shall be apportioned on a per diem basis between (i) the period
commencing prior to the Closing Date and ending on the Closing Date, and (ii)
the period commencing on the day immediately following the Closing Date and
ending on the last day of such tax period; and, in the case of any other Taxes,
such Taxes shall be apportioned on the actual activities, taxable income or
taxable loss of the Companies, as applicable, during such periods.

     Sales Taxes and Transfer Taxes relating to the transfer of the assets of
the Companies and the other transactions contemplated by this Agreement shall
be borne by Nabors. Nabors and Oxy shall cooperate fully with each other in
connection with (i) the preparation and filing of any Tax Return, exemption
certificate or other filing relating to such Sales Taxes or Transfer Taxes,
including, without limitation, registering as a licensed vendor in any state or
local jurisdiction as may be required to claim exemption from such Tax, and
(ii) any audit or examination by any Governmental Authority of the Tax Returns,
exemption certificates or other filings referred to above. Such cooperation
shall include, without limitation, the furnishing or making available books of
account, powers of attorney and other materials relating to the assets or the
stock of the Companies which are necessary or helpful for the defense against
the assertions of any taxing authority relating to any of the transactions
contemplated hereunder.

          (3)  COOPERATION. Oxy shall be solely responsible for, and shall
control, the conduct and settlement of audits for any periods ending on or
before the Closing Date, and Nabors shall be solely responsible for, and shall
control, the conduct and settlement of audits for any periods ending after the
Closing Date. Each Party agrees (i) to assist (and cause their respective
Affiliates to assist) the other Party in preparing any Tax Returns for which
such other Party is responsible, (ii) to cooperate fully (and to cause their
respective Affiliates to cooperate fully) in preparing for any audits of, or
disputes with, any Governmental Authorities regarding, any Tax Returns for
which such other Party is responsible or with respect to Taxes for which such
other Party is liable under this Agreement, (iii) to make available (and cause
their respective Affiliates to make available), as reasonably requested, all
information, records and documents relating to such Taxes, (iv) to provide
timely notice to the other Party in writing of any pending or threatened tax
audits or assessments for which such other Party may be liable under this
Agreement, (v) to furnish 



                                     -25-
<PAGE>   26

(and to cause their respective Affiliates to furnish) to the other Party any
correspondence received from any Governmental Authority in connection with any
tax audit, information request, or refund claim with respect to Taxes for which
such other Party may be liable under this Agreement, and (vi) to cooperate and
provide information, records and documents necessary to administer or enforce
this Agreement. Notwithstanding anything in this Agreement to the contrary, the
Parties (and their respective Affiliates) will continue to retain all tax
records and any other documents relevant to tax matters involving the Companies
or the assets thereof for any taxable year that begins before the Closing Date
for at least five years, and neither Oxy or Nabors nor any of their respective
Affiliates will destroy any such tax records or documents without written
notification at least 60 days before such destruction to Oxy or Nabors, as the
case may be. If Oxy or Nabors desires to retain such records, it shall be
permitted to do so at its own expense.

     6. CLOSING CONDITIONS.

     (a)  CONDITIONS TO OBLIGATION OF NABORS.  The obligation of Nabors to
purchase the Stock hereunder shall be subject to satisfaction of the following
conditions:

          (1)  Oxy shall have furnished Nabors at the Closing with certified
     copies of resolutions duly adopted by the Board of Directors of Oxy, which
     resolutions shall authorize the execution, delivery and performance of
     this Agreement by Oxy;

          (2)  The representations and warranties of Oxy set forth in Section 2
     shall be true and correct in all material respects as of the Closing with
     the same effect as though such representations and warranties had been
     made as of the Closing (except (i) to the extent that such representations
     and warranties expressly relate to an earlier date, or (ii) as
     contemplated by this Agreement);

          (3)  Oxy shall have performed, and complied with, in all material
     respects all of the covenants and agreements required of it by this
     Agreement as of the Closing;

          (4)  Nabors and Oxy shall have procured all of their third party
     consents specified in Section 4(b) without imposition of any material
     condition determined to be unacceptable to Nabors in its reasonable
     judgment;

          (5)  No action, suit or proceeding shall be pending before any court
     or quasi-judicial or administrative agency of any federal, state, local or
     foreign jurisdiction wherein an unfavorable injunction, judgment, order,
     decree, ruling or charge would (i) prevent the consummation of any of the
     transactions contemplated by this Agreement, (ii) cause any of such
     transactions to be rescinded following consummation, (iii) affect
     adversely the right of Nabors to own the common stock of each of the
     Companies and to control them, or (iv) affect adversely the right of each
     of the Companies to own its Assets and to operate its business (and no
     such injunction, judgment, order, decree, ruling or charge shall be in
     effect);



                                     -26-
<PAGE>   27

          (6)  Oxy shall have delivered to Nabors stock certificates
     representing the Stock, endorsed in blank or accompanied by duly executed
     stock powers, signature guaranteed;

          (7)  Oxy shall have delivered to Nabors a certificate to the effect
     that each of the conditions specified above in Section 6(a)(1)  through
     6(a)(6)  is satisfied in all material respects;

          (8)  All applicable waiting periods (and any extensions thereof)
     under the Hart-Scott-Rodino Act shall have expired or otherwise been
     terminated;

          (9)  Nabors shall have received the resignations, effective as of the
     Closing, of each director and officer of the Companies;

          (10) Nabors shall have received from (i) Robert E. Sawyer, Esq., an
     Associate General Counsel of OPC and counsel to Oxy and its Affiliates in
     connection with this transaction, an opinion, dated the Closing Date, in
     form and substance as set forth in Schedule 6(a)(10)(i), and (ii) Woodburn
     and Wedge, special Nevada counsel to Oxy in connection with this
     transaction, an opinion, dated the Closing Date, in form and substance as
     set forth in Schedule 6(a)(10)(ii); and

          (11) All actions, proceedings, instruments and other documents
     required to consummate the transactions contemplated by this Agreement,
     and all other related legal matters, shall be reasonably satisfactory to
     counsel to Nabors.

     At or prior to the Closing, Nabors may waive in writing any condition
specified in this Section 6(a).

     (b)  CONDITIONS TO OBLIGATION OF OXY.  The obligation of Oxy to sell the
Stock hereunder shall be subject to satisfaction of the following conditions:

          (1)  Nabors shall have furnished Oxy at the Closing with certified
     copies of resolutions duly adopted by the Board of Directors of Nabors,
     which resolutions shall authorize the execution, delivery and performance
     of this Agreement by Nabors;

          (2)  The representations and warranties of Nabors set forth in
     Section 3 shall be true and correct in all material respects as of the
     Closing with the same effect as though such representations and warranties
     had been made as of the Closing (except (i) to the extent that such
     representations and warranties expressly relate to an earlier date, or
     (ii) as contemplated by this Agreement);



                                     -27-
<PAGE>   28

          (3)  Nabors shall have performed, and complied with, in all material
     respects all of the covenants and agreements required of it by this
     Agreement as of the Closing;

          (4)  Nabors and Oxy shall have procured all of their third party
     consents specified in Section 4(b)  without imposition of any material
     condition determined to be unacceptable to Oxy in its reasonable
     judgment;

          (5)  No action, suit or proceeding shall be pending before any court
     or quasi-judicial or administrative agency of any federal, state, local or
     foreign jurisdiction wherein an unfavorable injunction, judgment, order,
     decree, ruling or charge would (i) prevent consummation of any of the
     transactions contemplated by this Agreement, (ii) cause any of such
     transactions to be rescinded following consummation, or (iii) affect
     adversely the right of Oxy to own the Warrant (and no such injunction,
     judgment, order, decree, ruling or charge shall be in effect);

          (6)  Nabors shall have delivered to Oxy at the Closing (i) the
     Estimated Cash Portion of the Purchase Price, and (ii) the Warrant duly
     executed by an authorized officer of Nabors;

          (7)  From the date of this Agreement, there shall not have occurred
     (i) any suspension or material limitation of trading in securities
     generally on the American Stock Exchange, (ii) any suspension of trading
     of any securities of Nabors, including the Nabors Common Stock, by the
     Securities and Exchange Commission or any national securities exchange, or
     (iii) any banking moratorium which shall have been declared by Federal or
     New York authorities;

          (8)  Nabors shall have delivered to Oxy a certificate to the effect
     that each of the conditions specified above in Section 6(b)(1) through
     6(b)(7) is satisfied in all material respects;

          (9)  All applicable waiting periods (and any extensions hereof) under
     the Hart-Scott-Rodino Act shall have expired or otherwise been terminated;

          (10) Oxy shall have received from Baker & McKenzie, counsel to
     Nabors, an opinion, dated the Closing Date, in form and substance as set
     forth in Schedule 6(b)(10); and

          (11) All actions, proceedings, instruments and other documents
     required to consummate the transactions contemplated by this Agreement,
     and all other related legal matters, shall be reasonably satisfactory to
     counsel to Oxy.

At or prior to the Closing, Oxy may waive in writing any condition specified in
this Section 6(b).



                                     -28-
<PAGE>   29

     (c)  WAIVER OF BREACH.  In the event of any breach by any Party of any of
the representations, warranties, covenants or agreements of such Party
contained in this Agreement (whether notice of such breach shall be set forth
in any certificate furnished pursuant to the provisions of Section 6(a)(7)  or
6(b)(8)  or otherwise), the other Party may elect to consummate the purchase and
sale of the Stock hereunder, and, upon any such election, (i)  the Parties may
enter into a mutually acceptable amendment to this Agreement addressing such
breach and any other matters related thereto, or (ii)  such other Party shall
unilaterally waive such breach; provided, however, that in no event shall the
Party responsible for such breach be required to enter into any such amendment
unless such amendment provides that such breach shall be deemed unconditionally
waived by such other Party for all purposes of this Agreement.

     (d)  WAIVER FOR ALL PURPOSES.  Any waiver of any condition pursuant to the
provisions of Section 6(a)  or 6(b)  shall be a waiver for all purposes of this
Agreement but only with respect to such condition, and any waiver of any breach
pursuant to the provisions of Section 6(c)  shall be a waiver for all purposes
of this Agreement but only with respect to such breach.

     7.   REMEDIES FOR BREACHES OF THIS AGREEMENT.

     (a)  SURVIVAL OF REPRESENTATIONS AND WARRANTIES.  Each of the
representations and warranties of the Parties contained in Sections 2 and 3 (as
confirmed by the certificates delivered pursuant to the provisions of Sections
6(a)(7)  and 6(b)(8)), and all of the covenants in Section 5, shall survive the
Closing hereunder for the Survival Period, after which they shall terminate and
be of no further force or effect.

     (b)  INDEMNIFICATION PROVISIONS FOR BENEFIT OF NABORS.  Oxy shall defend,
indemnify and hold Nabors harmless from and against any and all Adverse
Consequences incurred or suffered by Nabors or any of its Affiliates and
resulting from, or arising out of, any of the following:

          (i)  any breach or nonperformance, either partial or total, by Oxy of
     any representation, warranty, covenant or agreement of Oxy set forth in
     this Agreement, or in any certificate delivered by Oxy pursuant to the
     provisions of Section 6(a)(7);

          (ii) any Liability of any of the Companies to the extent, and only to
     the extent, that such Liability (1) was created or incurred on or before
     the Closing Date, or arose from any fact, event, condition or circumstance
     existing on or before the Closing Date, (2) is not a Continuing
     Obligation, (3) is not reflected in, or reserved against on, the Statement
     of Consolidated Working Capital, and (4) does not arise from (A) any
     representation, warranty, statement, information, opinion, projection,
     financial statement or advice referred to in clause (1) of Section 2(q),
     (B) the maintenance, repair, condition, quality, suitability, design or
     marketability of, or title of any of the Companies to, any of the Assets,
     the merchantability or fitness for any particular purpose of any of the
     Assets, or compliance with any Law applicable to any personal 



                                     -29-
<PAGE>   30

     property of any of the Companies, or (C) any matter set forth in clause
     (3) of Section 2(q). In the case of any Liability arising from workers'
     compensation claims, such Liability shall be considered to be created or
     incurred on or before the Closing Date if such claim relates exclusively
     to, or arises primarily as a result of, illnesses or injuries sustained on
     or prior to the Closing Date; and

         (iii) any Liability of any of the Companies arising out of any
     failure of either of the Profit Sharing Plans to meet the requirements of
     a "qualified plan" under section 401(a) of the Code as a result of any
     action, or omission, by any of the Companies prior to the Closing;

provided, however, that Oxy shall have no obligation to indemnify, defend or
hold Nabors harmless with respect to any Adverse Consequence (1)  to the extent
that such Adverse Consequence (A)  has been taken into account in calculating
the Purchase Price, or (B)  results from, or arises out of, any Real Property
Title Defect, or (2)  unless Oxy receives notice from Nabors of such Adverse
Consequence within the applicable Survival Period. Notwithstanding anything in
this Agreement to the contrary, Oxy shall not have any obligation to defend,
indemnify and hold Nabors harmless against any Adverse Consequence until Nabors
and its Affiliates have suffered Adverse Consequences for which Nabors is
entitled to indemnification hereunder in an aggregate amount exceeding $200,000
(and then only to the extent of such excess); provided, however, that the
limitation set forth immediately above with respect to $200,000 shall not apply
to any Adverse Consequence incurred or suffered by Nabors or any of its
Affiliates and resulting from, or arising out of, any Liability (y)
constituting a Special Matter and referred to in clause (i)  or (iii)  of the
definition thereof, or (z)  referred to in clause (iii)  of this Section 7(b).
Except as set forth hereafter in this Section 7(b), in no event shall Oxy's
aggregate liability for all Adverse Consequences exceed the aggregate value of
the Purchase Price.  Notwithstanding anything herein to the contrary, Oxy's
liability for any Adverse Consequences resulting from, or arising out of, any
of the representations, warranties, covenants and agreements of Oxy set forth
in Section 5(e)(9)  shall be unlimited in amount.  Nabors shall take all such
reasonable actions as may be necessary to mitigate its damages, which cost of
mitigation shall be covered by the indemnity set forth in this Section 7(b).

     Each notice of any Adverse Consequence referred to in this Section 7(b)
shall set forth the amount claimed by Nabors to be owing by Oxy to Nabors under
this Section 7(b) and a list identifying (to the extent reasonably possible)
each separate item constituting such Adverse Consequence.

     (c)  INDEMNIFICATION PROVISIONS FOR THE BENEFIT OF OXY.  Nabors shall
defend, indemnify and hold Oxy harmless from and against any and all Adverse
Consequences incurred or suffered by Oxy or any of its Affiliates and resulting
from, or arising out, of any of the following:



                                     -30-
<PAGE>   31

          (i)  any breach or non-performance, either partial or total, by
     Nabors of any representation, warranty, covenant or agreement of Nabors
     set forth in this Agreement or in any certificate delivered by Nabors
     pursuant to the provisions of Section 6(b)(8); and

          (ii) any Liability of any of the Companies to the extent, and only to
     the extent, that such Liability (1) is created or incurred after the
     Closing Date, or arises after the Closing Date from any fact, event,
     condition or circumstance existing from and after the Closing Date, or (2)
     is a Continuing Obligation;

provided; however, that Nabors shall have no obligation to indemnify, defend or
hold Oxy harmless with respect to any Adverse Consequence unless Nabors
receives notice from Oxy of such Adverse Consequence within the applicable
Survival Period.

     Oxy shall take all such reasonable actions as may be necessary to mitigate
its damages, which cost of mitigation shall be covered by the indemnity set
forth in this Section 7(c).

     Each notice of any Adverse Consequence referred to in this Section 7(c)
shall set forth the amount claimed by Oxy to be owing by Nabors to Oxy under
this Section 7(c) and a list identifying (to the extent reasonably possible)
each separate item constituting such Adverse Consequence.

     (d)  MATTERS INVOLVING THIRD PARTIES.

          (1)  If any third party shall notify any Party (the "Indemnified
     Party") with respect to any matter (a "Third Party Claim") that may give
     rise to a claim for indemnification against any other Party (the
     "Indemnifying Party") under Section 4(m), 4(n), 5(e), 9(n) or this Section
     7, then the Indemnified Party shall promptly notify the Indemnifying Party
     thereof in writing; provided, however, that no delay on the part of
     the Indemnified Party in notifying the Indemnifying Party shall relieve
     the Indemnifying Party from any obligation hereunder unless (and then
     solely to the extent that) the Indemnifying Party thereby is prejudiced.

          (2)  The Indemnifying Party will have the right to defend the
     Indemnified Party against any Third Party Claim and administer all aspects
     of such defense with counsel of its choice reasonably satisfactory to the
     Indemnified Party so long as (i) the Indemnifying Party notifies the
     Indemnified Party in writing within 15 days after the Indemnified Party
     has given notice of such Third Party Claim that the Indemnifying Party
     will indemnify the Indemnified Party from and against the entirety of any
     Adverse Consequences that the Indemnified Party may suffer resulting from,
     arising out of, relating to, or caused by, such Third Party Claim; (ii)
     such Third Party Claim involves only money damages and does not seek an
     injunction or other equitable relief; and (iii) 



                                     -31-
<PAGE>   32

     the Indemnifying Party conducts the defense of the Third Party Claim
     actively and diligently.

          (3)  So long as the Indemnifying Party is conducting the defense of
     any Third Party Claim in accordance with Section 7(d)(2), (i), unless such
     Third Party Claim involves Liabilities for litigation, workers'
     compensation, or general or automobile liability existing on the Closing
     Date, the Indemnified Party may retain separate co-counsel at its sole
     cost and expense and participate in the defense of the Third Party Claim,
     (ii) the Indemnified Party will not consent to the entry of any judgment
     or enter into any settlement with respect to such Third Party Claim
     without the prior written consent of the Indemnifying Party (which consent
     will not be withheld unreasonably); and (iii), unless such Third Party
     Claim involves Liabilities for litigation, workers' compensation, or
     general or automobile liability existing on the Closing Date, the
     Indemnifying Party will not consent to the entry of any judgment or enter
     into any settlement with respect to such Third Party Claim without the
     prior written consent of the Indemnified Party (which consent will not be
     withheld unreasonably).

          (4)  In the event that any of the conditions in Section 7(d)(2) is or
     becomes unsatisfied, (i) the Indemnified Party may defend against any
     Third Party Claim in any manner it reasonably may deem appropriate;
     provided, however, that the Indemnified Party shall not consent to the
     entry of any judgment or enter into any settlement or agreement to settle
     such Third Party Claim without the prior written consent of the
     Indemnifying Party (which consent shall not be unreasonably withheld);
     (ii) the Indemnifying Party will reimburse the Indemnified Party promptly
     and periodically for the costs of defending against such Third Party Claim
     (including reasonable attorneys' fees and expenses); and (iii) the
     Indemnifying Party will remain responsible for any Adverse Consequences
     that the Indemnified Party actually suffers resulting from, arising out
     of, relating to, or caused by, such Third Party Claim to the fullest
     extent provided in this Section 7.

          (5)  To the extent of any payment by the Indemnifying Party of any
     amount in accordance with the provisions of this Section 7, the
     Indemnifying Party shall be subrogated to all rights which the Indemnified
     Party shall have against third parties for the matter indemnified against,
     upon the full satisfaction by the Indemnifying Party of its indemnity and
     payment obligations with respect to such matter.

          (6)  The provision and procedures of this Section 7(d) (other than
     the notice requirement in Section 7(d)(1)) shall apply to any Third Party
     Claim existing on the Closing Date and relating to Liabilities for
     litigation, workers' compensation, or general or automobile liability, and
     Oxy hereby assumes, effective as of the Closing, all, and shall have sole,
     responsibility for the payment, administration and defense of, such Third
     Party Claims.



                                     -32-
<PAGE>   33

     (e)  REAL PROPERTY TITLE DEFECTS.  In the event that any Real Property
Title Defect with respect to any parcel of real property Owned by any of the
Companies at the Closing shall exist at the Closing, Oxy shall pay to Nabors,
not later than 30 days after demand therefor, an amount equal to the amount
determined by multiplying (i)  the number of acres contained in such parcel, by
(ii)  $1,000; provided, however, that no such demand shall be made more than
five years after the Closing Date.

     (f)  PROCEDURES WITH RESPECT TO REMEDIATION OF REAL PROPERTY.  The
following special procedures apply to any remediation or clean up obligation
with respect to Real Property covered by Section 7(b):

     (1)  If Nabors receives a notice of violation or a demand of any
Governmental Authority or is aware that remediation or cleanup is required to
achieve an enforceable standard under an Environmental, Health or Safety Law as
a consequence of a condition in existence on any Real Property on or before the
Closing Date, Nabors will provide written notice to Oxy with respect to such
circumstances.

     (2)  In such notice, Nabors shall:

     (A)  provide Oxy with the opportunity to perform such remediation or
cleanup at Oxy's own expense, subject only to the requirement that such
remediation or cleanup achieves the applicable enforceable standard established
under the applicable Environmental, Health and Safety Law or is accomplished to
the approval of the applicable Governmental Authorities with jurisdiction
within the time periods provided by such Governmental Authorities, and

     (B)  provide Oxy or its designee with the option of purchasing the property
subject to such Liability (or the interest of any of the Companies therein) at
a price equal to the sum of (I) $1,000 per acre, (II) the Fair Market Value of
any fixtures and other permanent improvements thereon, and (III) the actual
reasonable cost of moving any equipment and movable personal property located
thereon to another location, selected by Nabors, that is not more than 50 miles
from such property. In the event that Oxy elects to purchase any such property
(or the interest of any of the Companies therein), (y) Nabors will use all
reasonable commercial efforts to obtain any third-party consents that are
required for the consummation of such purchase, and (z), if Nabors receives the
requested consents, Nabors will execute and deliver to Oxy or its designee a
deed or other assignment document (in which Nabors will indemnify Oxy from and
against any Adverse Consequence incurred or suffered by Oxy or any of its
Affiliates and resulting from, or arising out of, any Liability of Oxy or any
such Affiliate under Environmental, Health and Safety Laws with respect to such
property to the extent that such Liability was created, incurred or arose as a
result of any activities of the Companies from and after the Closing Date
through the date of conveyance of such property), reasonably acceptable to Oxy
and Nabors, conveying title to such property (or such interest therein) free
and clear of any Lien (other than any Lien in existence on the Closing Date or
a Lien arising as a result of the condition giving rise to the applicable
remediation or clean up requirement).



                                     -33-
<PAGE>   34

     (3)  Oxy shall inform Nabors not later than the 30th calendar day after
receipt by Oxy of such notice (or such shorter period if required by any
Governmental Authority) of the action, if any, that Oxy intends to take
pursuant to clause (A) or (B) of this Section 7(f). If Oxy elects not to take
either of the actions described in clause (A) or (B) of this Section 7(f) or
fails to respond within the time period set forth herein, Nabors, without
waiving any of its rights under Section 7(b), shall be free to take such
actions as it deems to be appropriate in its sole discretion.

     (4)  Oxy's obligations under Section 7(b) and this Section 7(f) do not
require the removal of friable asbestos from any building, equipment or tank
(other than an underground storage tank) that as of the Closing Date was being
used by any of the Companies in the Ordinary Course of Business of such Company
and was not subject to any asbestos removal requirement to achieve an
enforceable standard established under any Environmental, Health and Safety
Law.

     (5)  Notwithstanding any remediation or purchase by Oxy or its designee of
any such Real Property as provided herein, Oxy's indemnity obligations under
Section 7(b) shall continue with respect to such Real Property to the extent
provided therein.

     (6)  This provision does not limit Oxy's obligations pursuant to the
provisions of Section 7(b) with respect to any Liability arising under any
Environmental, Health and Safety Law with respect to real property other than
Real Property.

     (g)  SOLE REMEDY FOR BREACHES OF THIS AGREEMENT.  Following the Closing,
the foregoing indemnification provisions will be the sole remedy of the Parties
for breaches of the representations, warranties, covenants or agreements
contained herein, and each Party hereby waives any other statutory, equitable
or common law remedy such Party would otherwise have for any breach of this
Agreement.

     (h)  SPECIFIC PERFORMANCE.  In the event of the satisfaction by any Party
of the conditions, set forth in Section 6(a) or 6(b) (including any such
satisfaction as a result of any agreement or waiver referred to in Section
6(a), 6(b) or 6(c)), to the purchase or sale of the Stock hereunder, the
obligation of such Party to consummate such purchase or sale shall be
specifically enforceable by the other Party, and, in such event, the first
Party waives any defense in any proceeding in equity that monetary damages
would be a sufficient remedy for any breach by such Party of such obligation.

     8.   TERMINATION.

     (a)  TERMINATION OF AGREEMENT.  Anything herein to the contrary
notwithstanding, this Agreement and the transactions contemplated hereby may be
terminated at any time before the Closing as provided below:



                                     -34-
<PAGE>   35

          (1)  Nabors and Oxy may terminate this Agreement by mutual written
     consent;

          (2)  Nabors may terminate this Agreement by giving written notice to
     Oxy if: (i) in the event that Oxy has breached any representation,
     warranty, covenant or agreement contained in this Agreement in any
     material respect, Nabors has notified Oxy of such breach, and such breach
     has continued without cure for a period of 30 days after such notice, or
     (ii) the Closing shall not have occurred on or before the Termination
     Date, by reason of the failure of any condition precedent under Section
     6(a); and

          (3)  Oxy may terminate this Agreement by giving written notice to
     Nabors if: (i) in the event that Nabors has breached any representation,
     warranty, covenant or agreement contained in this Agreement in any
     material respect, Oxy has notified Nabors of such breach, and such breach
     has continued without cure for a period of 30 days after such notice, or
     (ii) the Closing shall not have occurred on or before the Termination
     Date, by reason of the failure of any condition precedent under Section
     6(b).

     (b)  EFFECT OF TERMINATION.  If any Party terminates this Agreement
pursuant to Section 8(a), all rights and obligations of the Parties hereunder
shall terminate without any Liability of either Party to the other Party,
except that the provisions of Sections 9(a), 9(b), 9(c), 9(d), 9(e), 9(g),
9(h), 9(i), 9(j), 9(m)  and 9(n)  shall survive any such termination; provided,
however, that any termination pursuant to Section 8(a)(2)  or 8(a)(3)  shall not
relieve any Party of any Liability to the other Party for any willful or
intentional breach of this Agreement occurring prior to such termination, and
no such termination shall be deemed to be a waiver of any applicable remedy for
any such breach.

     9.   MISCELLANEOUS.

     (a)  CONFIDENTIALITY.  Nabors and its Affiliates shall, and shall cause
their respective employees, agents, accountants, legal counsel and other
representatives to, hold in strict confidence, and not utilize for any
commercial or other purpose whatsoever, information of any kind concerning Oxy,
the Companies or their respective businesses, in each case obtained from Oxy,
the Companies or any of their respective Affiliates, employees, agents,
accountants, legal counsel or other representatives (hereinafter such
information is referred to as the "Information"); provided, however,  that the
foregoing obligation of confidence shall not apply to (i)  any Information that
is or shall become generally available to the public other than as a result of
a disclosure by Nabors, any of its Affiliates or the respective employees,
agents, accountants, legal counsel or other representatives of Nabors or any
such Affiliate, (ii)  any Information that is or shall become available to
Nabors or its employees, agents, accountants, legal counsel or other
representatives prior to the Closing on a nonconfidential basis prior to its
disclosure by Nabors or its employees, agents, accountants, legal counsel or
other representatives, and (iii)  any Information that shall be required to be
disclosed by Nabors, any of its Affiliates or the respective employees, agents,
accountants, legal counsel or other representatives of Nabors or any such
Affiliate as a result of any offering of securities of Nabors



                                     -35-
<PAGE>   36

or of any such Affiliate or otherwise in each case under any Law or any rule or
regulation of any stock exchange. The obligations of Nabors under this Section
9(a) shall terminate on (1) the Closing Date, or (2) on March 31, 2001, if no
Closing shall occur.

     (b)  PRESS RELEASES AND PUBLIC ANNOUNCEMENTS.  Prior to the Closing, the
Parties shall not, and shall not permit any of their respective Affiliates to,
issue any press release or other public announcement relating to the subject
matter of this Agreement (other than presentations to security analysts and
financial institutions)  except (i)  with the prior approval of the other Party,
or (ii)  when, on the advice of legal counsel, such release or announcement is
required by the federal securities laws or the rules and regulations of any of
the national stock exchanges (in which case the disclosing Party shall consult
with the other Party prior to making the disclosure).

     (c)  NO THIRD-PARTY BENEFICIARIES.  NOTHING CONTAINED IN THIS AGREEMENT,
EXPRESS OR IMPLIED, IS INTENDED TO CONFER UPON ANY PERSON, OTHER THAN THE
PARTIES AND THEIR RESPECTIVE SUCCESSORS AND PERMITTED ASSIGNS, ANY RIGHTS,
REMEDIES OR OBLIGATIONS UNDER, OR BY REASON OF, THIS AGREEMENT.

     (d)  ENTIRE AGREEMENT.  This Agreement (including the documents referred to
herein)  constitutes the entire agreement between the Parties and supersedes all
prior understandings and agreements, including, but not limited to, the
Confidentiality Agreement, with respect to the subject matter hereof or
thereof.

     (e)  ASSIGNMENT.  This Agreement shall be binding upon, and inure to the
benefit of, the Parties and their respective successors and permitted assigns,
but neither this Agreement nor any of the rights, interests or obligations
hereunder shall be assigned, by operation of law or otherwise, by any Party
without the prior written consent of the other Party; provided, however, that
Nabors may assign this Agreement or its rights hereunder to any wholly owned
subsidiary provided that (i), prior to any such assignment, the Person to which
such assignment shall be made shall expressly assume by an instrument in
writing, executed and delivered to Oxy, the performance and observance of every
obligation, covenant and agreement in this Agreement on the part of Nabors to
be performed or observed, and (ii)  no such assignment shall have the effect of
releasing Nabors or any other Person (including, without limitation, any
additional party)  from its obligations, covenants or agreements under this
Agreement.

     (f)  COUNTERPARTS.  This Agreement may be executed in one or more
counterparts, each of which when so executed shall be deemed an original, but
all of which together shall constitute one and the same instrument.



                                     -36-
<PAGE>   37

     (g)  NOTICES.  All notices and other communications hereunder to a Party
shall be in writing and shall be sent by (i)  personal delivery (including
courier service), (ii)  telecopier during normal business hours to the number
indicated below, or (iii)  first class or registered or certified mail, postage
prepaid, and addressed as follows (any communication shall be deemed given upon
receipt):

     IF TO OXY AT:

     Occidental Oil and Gas Corporation
     1200 Discovery Drive
     Bakersfield, California 93309-7008
     Attention:  Executive Vice President and
                 Chief Financial Officer
     Telecopier:  (805)  322-7457

     WITH A COPY TO:

     Occidental Petroleum Corporation
     10889 Wilshire Boulevard
     Los Angeles, California 90024
     Attention:  Vice President - Operations
     Telecopier: (310)   443-6331

     IF TO NABORS AT:

     Nabors Industries, Inc.
     515 West Greens Road, Suite 1200
     Houston, Texas 77067
     Attention: Anthony G. Petrello, President
     Telecopier No.: (713)  872-5205

     WITH A COPY TO:

     Baker & McKenzie
     805 Third Avenue
     New York, New York 10022
     Attention: Howard M. Berkower
     Telecopier: (212)  759-9133.

     Any Party may change its telecopier number or its address to which notices
and other communications hereunder are to be delivered by giving the other
Party notice in the manner herein set forth.



                                     -37-
<PAGE>   38

     (h)  GOVERNING LAW.  This Agreement shall be governed by, and construed in
accordance with, the laws of the State of New York, without regard to
principles of conflicts of law.

     (i)  SERVICE OF PROCESS, CONSENT TO JURISDICTION, ETC.  Each Party hereby
irrevocably agrees that any legal action or proceeding against it arising out
of this Agreement may be brought in the courts of the State of New York, or of
the United States of America for the Southern District of New York, and does
hereby irrevocably (i) agree to designate, appoint and empower, prior to the
Closing Date, an agent to receive for and on behalf of it service of process in
the State of New York, and (ii) consent to service of process outside the
territorial jurisdiction of such courts in the manner permitted by law. In
addition, each Party irrevocably waives (a) any objection which such Party may
now or hereafter have to the laying of venue of any suit, action or proceeding
arising out of, or relating to, this Agreement brought in any such court, (b)
any claim that any such suit, action or proceeding brought in any such court
has been brought in an inconvenient forum, and (iii) the right to object, with
respect to any such claim, suit, action or proceeding brought in any such
court, that such court does not have jurisdiction over such Party or any other
Party. In addition, any such legal action or proceeding may be brought in any
court having jurisdiction pursuant to applicable law.

     (j)  AMENDMENTS AND WAIVERS.  No amendment of any provision of this
Agreement shall be valid unless the same shall be in writing and signed by each
Party hereto. No waiver by either Party of any default, misrepresentation,
breach of warranty or covenant hereunder, whether intentional or not, shall be
deemed to extend to any prior or subsequent default, misrepresentation, breach
of warranty or covenant hereunder or affect in any way any rights arising by
virtue of any prior or subsequent such occurrence.

     (k)  HEADINGS. The descriptive headings of the several Sections of this
Agreement are inserted for convenience only and do not constitute a part of
this Agreement.

     (l)  SEVERABILITY.  Any provision of this Agreement which is prohibited or
unenforceable in any jurisdiction shall, as to such jurisdiction, be
ineffective to the extent of such prohibition or unenforceability without
invalidating the remaining provisions hereof or affecting the validity or
enforceability of such provision in any other jurisdiction.

     (m)  EXPENSES.  Except as otherwise provided herein, each of the Parties
will bear all of its own costs and expenses (including, without limitation,
legal and accounting fees and expenses)  incurred in connection with this
Agreement and the transactions contemplated hereby.

     (n)  BROKERAGE INDEMNITIES. Regardless of whether the Closing shall occur,
(i) Oxy shall indemnify and hold harmless Nabors and its Affiliates from and
against any and all Liability for any brokers or finders fees arising with
respect to any brokers or finders retained or engaged by Oxy or any of its
Affiliates in respect of the transactions contemplated by this Agreement, and
(ii) Nabors shall indemnify and hold harmless Oxy and its Affiliates from and



                                     -38-
<PAGE>   39

against any and all Liability for any brokers or finders fees arising with
respect to any brokers or finders retained or engaged by Nabors or any of its
Affiliates in respect of the transactions contemplated by this Agreement.

     (o)  CONSTRUCTION.  The Parties have participated jointly in the
negotiation and drafting of this Agreement. In the event any ambiguity or
question of intent or interpretation arises, this Agreement shall be construed
as if drafted jointly by the Parties, and no presumption or burden of proof
shall arise favoring or disfavoring either Party by virtue of the authorship of
any of the provisions of this Agreement. Personal pronouns, when used in this
Agreement, whether in the masculine, feminine or neuter gender, shall include
all other genders, and the singular shall include the plural, and vice versa.
All references in this Agreement or in any Schedule attached hereto to (i)
Sections or subsections shall refer to the corresponding Section or subsection
of this Agreement, unless specific reference is made to a Section or subsection
of another document or instrument, and (ii) a Schedule or an Exhibit shall
refer to the corresponding Schedule or Exhibit to this Agreement, unless a
specific reference is made to a Schedule or an Exhibit to another document or
instrument. Any reference in this Agreement to any federal, state, local or
foreign statute or law shall be deemed also to refer to all rules and
regulations promulgated thereunder, unless the context requires otherwise. The
word "including" shall mean including without limitation.

     (p)  INCORPORATION OF EXHIBITS AND SCHEDULES.  The Exhibits and Schedules
identified in this Agreement are incorporated herein by reference and made a
part hereof.




     IN WITNESS WHEREOF, the Parties hereto have executed this Agreement as of
the date first above written.

                                        NABORS INDUSTRIES, INC.


                                        By:
                                           --------------------------------
                                            Name:
                                            Title:




                                        OCCIDENTAL OIL AND GAS CORPORATION


                                        By:
                                           --------------------------------
                                            Name:
                                            Title:


                                     -39-
<PAGE>   40
                                                                      EXHIBIT A


                                  Definitions


     "Adverse Consequences" means all actions, suits, proceedings,
investigations, charges, complaints, claims, demands, judgments, orders,
decrees, rulings, damages, fines, costs, amounts paid in settlement,
liabilities, losses and expenses, including court costs and reasonable
attorneys' fees and expenses, but excluding (i) any diminution in the value of
any Asset or the stock of any of the Companies, and (ii) (except to the extent
claimed by a third party in connection with a Third Party Claim) any loss of
profits, indirect, consequential or punitive damages.

     "Affiliate" means any Person that is an "affiliate" within the meaning of
the regulations promulgated under the Securities Act, as such regulations and
Act shall be amended and in effect on the date of the Agreement.  Each of the
Companies shall (i), with respect to all periods of time prior to, and
immediately before, the Closing, be an Affiliate of Oxy, and (ii), with respect
to all periods of time after, and commencing upon, the Closing, and so long as
owned by Nabors or any of its Affiliates, be an Affiliate of Nabors.

     "Affiliated Group" means any affiliated group within the meaning of Code
Sec. 1504.

     "Agreement" means the Agreement to which this Exhibit is attached.

     "Assets" means any and all properties and assets (real, personal or mixed,
tangible or intangible) of any of the Companies (other than Excluded Assets).

     "Average Closing Price" means the average closing price of the Nabors
Common Stock on the American Stock Exchange as reported by the Wall Street
Journal for the 10 trading days ending three trading days prior to the Closing
Date.

     "Bonus Plans" means (i) the Exeter Management Bonus Plans, and (ii) the
Gibson management bonus plan for administrative support.

     "Business Day" means any day, other than a Saturday, Sunday or a day on
which banking institutions in the City of New York, State of New York, are
required or authorized by law to close.

     "Cash Portion of the Purchase Price" means the Estimated Cash Portion of
the Purchase Price, after giving effect to the adjustments after the Closing
relating to Consolidated Working Capital and prorations described in Section
1(h).



                                     -40-
<PAGE>   41

     "Casualty Event" has the meaning set forth in Section 1(j).

     "Casualty Notice" has the meaning set forth in Section 1(j).

     "Closing" has the meaning set forth in Section 1(f).

     "Closing Date" has the meaning set forth in Section 1(f).

     "COBRA" means the Consolidated Omnibus Budget Reconciliation Act of 1985,
as amended.

     "Code" means the Internal Revenue Code of 1986, as amended.  All citations
to the Code, or to the Treasury Regulations promulgated thereunder, shall
include any amendments thereto or any substitute or successor provisions
thereof.

     "Commitment" means any undertaking, guarantee or other commitment,
including, without limitation, any insurance bond.

     "Companies" means Exeter, Gibson and International, and, after the
Closing, any successor to any thereof by merger, consolidation or otherwise.

     "Companies Employee Benefit Plans" has the meaning set forth in Section
2(j)(4).

     "Confidentiality Agreement" means the letter, dated May 14, 1993, between
OPC and Nabors.

     "Consideration" means the consideration for the Stock comprising of the
Cash Portion of the Purchase Price and the Warrant.

     "Consolidated Working Capital" means the consolidated working capital of
the Companies consisting of the sum of the following items at the Closing Date:

     (i)  cash,

     (ii) accounts receivable and notes receivable from, and advances to,
          Persons (other than Oxy or its Affiliates),

    (iii) insurance claims,

     (iv) prepaid expenses,

     (v)  deferred charges,



                                     -41-
<PAGE>   42

     (vi) $300,000, representing the agreed inventory value for purposes of
          this Agreement,

    (vii) the amount determined by multiplying (1) the number of feet of drill
          pipe (not exceeding 20,000 feet) purchased and paid for by any of the
          Companies prior to the Closing and described in the letter, dated
          March 5, 1996, from National Oilwell to Exeter, by (2) $21.31 per
          foot, and

   (viii) the total amount of capital expenditures made by any of the
          Companies from January 1, 1996 to the Closing Date to the extent that
          such amount exceeds the amount determined by multiplying $13,333 by
          the number of days which shall have occurred between January 1, 1996
          and the Closing Date; provided, however, that the amount determined
          pursuant to the provisions of this clause (f) shall not exceed the
          sum of the amounts referred to in clause (f) below;

less the sum of the following items at the Closing Date:

     (a)  reserves for uncollectible accounts and notes receivable maintained
          in accordance with GAAP; provided, however, that, for purposes of
          calculating the adjustment described in Section 1(h), all insurance
          claims, accounts and notes receivable or other receivables that are
          not collected on or before the date that is 120 calendar days
          following the Closing Date (or the next Business Day if such date is
          not a Business Day) shall be included in such reserves,

     (b)  accounts, notes and other obligations payable (to Persons other than
          Oxy or its Affiliates) due in one year or less,

     (c)  accrued expenses due in one year or less, including any such expense
          representing accrued vacation time for Employees,

     (d)  accrued but unpaid Taxes (other than Sales Taxes and Transfer Taxes
          referred to in Section 5(g)(2)) payable by any of the Companies due
          in one year or less,

     (e)  long-term obligations evidenced by invoices or notes payable that
          were rendered or signed, as the case may be, prior to the Closing,

     (f)  amounts which are received, or receivable, by any of the Companies
          after December 31, 1995 in violation of clause (g) of Section 4(c),
          and

     (g)  deferred credits;



                                     -42-
<PAGE>   43

provided, however, that the items referred to in clauses (a) through (g) above
shall not include any Liabilities that Oxy shall have assumed pursuant to the
provisions of clause (6) of Section 7(d).

     "Consolidated Subsidiary" of any Person means any Subsidiary of such
Person included in the financial statements of such Person and its Subsidiaries
prepared on a consolidated basis in accordance with GAAP.

     "Continuing Obligation" means any of the following:

     (i)  All of the Liabilities of any of the Companies incurred in the
operation of the business of such Company after the Closing pursuant to the
provisions of any (1) Commitment, (2) Contract, or (3) Permit, in each case to
which any of the Companies was a party or to which any of the Companies or any
of the Assets were subject prior to the Closing; and

     (ii)  All Liabilities associated with, or relating to, the Assets arising,
or to be performed, after the Closing, including, but not limited to, trade
payables arising after the Closing and any amounts to be paid after the Closing
relating to the period after the Closing;

provided, however, that in no event shall "Continuing Obligation" be deemed to
include any Liabilities of any of the Companies or any other Person (1)
associated with, or arising out of, any Excluded Asset, (2) of any nature
whatsoever which (A) relates to, or arises out of, events occurring, actions
taken or omitted to be taken, prior to the Closing, and (B) is required to be
performed prior to the Closing, (3) which arises under any claim, litigation or
other cause of action (whether threatened or pending) based on occurrences or
events that occurred prior to the Closing, (4) which relate to the borrowing of
money or the obtaining of advances or credit for money, including, but not
limited to, any lease agreement which is a capital lease, (5) which relate to
amounts payable in connection with transactions between or among any of the
Companies or its Affiliates, (6) in respect of any obligation of any of the
Companies (including any Special Matter) to the extent that such obligation (or
Special Matter) does not arise from the operation or ownership of the business
or the Assets of such Company following the Closing, (7) to the extent that any
such Liability is for the payment for products or services which shall be
received by any of the Companies prior to the Closing Date, or (8) to the
extent that any such Liability is expressly assumed by Oxy pursuant to the
provisions of this Agreement.

     "Contract" of any Person means any contract, agreement or instrument of
any type whatsoever (i) to which such Person is a party and by which such
Person either has made a binding undertaking to perform an obligation or is
entitled to any property or right, or (ii) by which any of the assets of such
Person is bound.



                                     -43-
<PAGE>   44

     "Employees" means all active employees (either salaried or hourly) of the
Companies, including employees who are, on the Closing Date, on short-term
disability, sick leave or other short-term leave of absence.

     "Employee Benefit Plan" means (i) any plan, program or arrangement which
is an Employee Pension Benefit Plan or an Employee Welfare Benefit Plan, or
(ii) any bonus, incentive compensation, profit sharing, group insurance, death
benefit, medical expense reimbursement or premium conversion, worker's
compensation, dependent care, stock option, stock purchase, stock appreciation
rights, savings, deferred compensation, consulting, severance pay or
termination pay, vacation pay, or other employee benefit or fringe benefit
plan, program or arrangement.

     "Employee Pension Benefit Plan" has the meaning set forth in ERISA Sec.
3(2).

     "Employee Welfare Benefit Plan" has the meaning set forth in ERISA Sec.
3(1).

     "Environmental, Health, and Safety Law" means the Comprehensive
Environmental Response, Compensation and Liability Act of 1980, the Resource
Conservation and Recovery Act of 1976, the Occupational Safety and Health Act
of 1970, the Outer Continental Shelf Lands Act, the Clean Water Act, the Oil
Pollution Act, the Clean Air Act, and the Hazardous Materials Transportation
Act, each as amended, together with all other laws (including rules,
regulations, codes, plans, injunctions, common law judgments, orders, decrees,
rulings and charges thereunder) of foreign, federal, state, and local
governments (and all agencies thereof) concerning pollution or protection of
the environment (including, without limitation, ambient air, surface water,
ground water, land surface or subsurface strata), public health and safety, or
employee health and safety, including laws relating to emissions, discharges,
releases or threatened releases of pollutants, contaminants, or chemical,
industrial, hazardous or toxic materials or wastes into ambient air, surface
water, ground water or lands, or otherwise relating to the manufacture,
processing, distribution, use, treatment, storage, disposal, transport or
handling of pollutants, contaminants, or chemical, industrial, hazardous or
toxic materials or wastes.

     "Equity Securities" of any Person means the capital or voting stock of
such Person and all other securities convertible into, or exchangeable or
exercisable for, any shares of such capital or voting stock, all rights to
subscribe for or to purchase, all options and warrants for the purchase of, and
all calls, commitments or claims of any character relating to, any shares of
such capital or voting stock, all equity equivalents, interests in the
ownership or earnings or other similar rights of, or with respect to, such
Person, and any securities convertible into or exchangeable or exercisable for
any of the foregoing.

     "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended.

     "ERISA Affiliate" means each person (as defined in Section 3(9) of ERISA)
that would be treated as a single employer under Section 4001(b) of ERISA or
that would be 



                                     -44-
<PAGE>   45

deemed to be a member of the same "controlled group" within the meaning of
Section 414(b), (c), (m) and (o) of the Code (provided, however, that, when the
subject of the provision is a multiemployer plan, only subsection (b) and (c)
and of Section 414 of the Code shall be taken into account).

     "Estimated Cash Portion of the Purchase Price" means the sum of (i)
$18,000,000, and (ii) the estimated amount of the Consolidated Working Capital,
calculated as provided in Section 1(d) of the Agreement, less any reductions in
the Purchase Price under Section 1(j).

     "Exchange Act" means the Securities and Exchange Act of 1934, as amended.

     "Excluded Assets" means (i) the leases identified on Schedule A-1, (ii)
all properties and assets (real, personal or mixed, tangible or intangible)
which are subject to any of such leases, (iii) all artwork, sculptures,
photographs and pictures located at the offices of Exeter in Denver, Colorado,
(iv) any Asset which Nabors, pursuant to the provisions of Section 1(j)(i),
shall have elected to treat as an Excluded Asset, (v) any amount received or
receivable by Exeter as a result of any judgment or settlement in the case
styled "Texakoma Oil & Gas Corporation v. Exeter Drilling Company", 193rd
Judicial District Court, Dallas County, Texas (Cause No. 94-07308), and (vi)
any furniture and the telephone system located at the offices of Exeter in
Denver, Colorado (other than any 10 office furniture sets selected by Nabors).

     "Exeter" means Exeter Drilling Company, a Nevada corporation.

     "Exeter Common Stock"  means the common stock, no par value, of Exeter.

     "Exeter Subsidiaries" means Gibson and International.

     "Fair Market Value" of any Asset means the value that would be obtained in
an arm's length transaction between an informed and willing buyer and an
informed and willing seller, determined by the agreement of Oxy and Nabors or
by appraisal as hereinafter provided.  If the Fair Market Value of any Asset
must be determined, Oxy shall submit to Nabors an estimate of the Fair Market
Value of such Asset, and Oxy and Nabors shall consult for the purpose of
determining the Fair Market Value of such Asset.  If, on or before the
fifteenth calendar day after Oxy shall have provided such an estimate, Oxy and
Nabors shall not have reached agreement on the Fair Market Value of such Asset,
Oxy shall designate, on or before the fifteenth calendar day after the
expiration of such 15-day period, five nationally recognized appraisal firms
with which Oxy has not conducted business within the three years previous
thereto.  Nabors shall select, on or before the tenth calendar day after such
designation, one of such appraisal firms to conduct an appraisal of such Asset,
and the Fair Market Value of such Asset shall be determined by such appraisal
firm as promptly as possible (and in any event on or before the thirtieth
calendar day thereafter).  The cost of such appraisal shall be paid in equal
proportions by Oxy and Nabors.  Oxy shall provide to Nabors 



                                     -45-
<PAGE>   46

and, if applicable, such appraisal firm, all information reasonably requested
by Nabors or such appraisal firm, as the case may be, to determine the Fair
Market Value of such Asset.

     "Financial Statements"  means the consolidated balance sheet of Exeter and
its Consolidated Subsidiaries as of December 31, 1995, and the related
consolidated statements of income and cash flows for the year then ended.

     "GAAP" means generally accepted accounting principles in the United States
of America.

     "Gibson" means J. W. Gibson Well Service Company, a Delaware corporation.

     "Governmental Authority" means (i) any federal, state, local, foreign or
other governmental, administrative, regulatory or self-regulating authority or
agency, (ii) any court, tribunal or administrative hearing body, or (iii) any
other similar dispute resolving panel or body (including any arbitrator or
mediator).

     "Hart-Scott-Rodino Act" means the Hart-Scott-Rodino Antitrust Improvements
Act of 1976, as amended.

     "Indemnified Party" has the meaning set forth in Section 7(d)(1).

     "Indemnifying Party" has the meaning set forth in Section 7(d)(1).

     "Information" has the meaning set forth in Section 9(a).

     "International" means Exeter International, Inc., a Delaware corporation.

     "International Contract" means (i) the Completion Rig Services Contract
No. 11920410, dated October 27, 1992, between CanadianOxy Offshore
International Ltd. and Exeter, as amended or extended, and (ii) the Onshore
Drilling Contract, dated June 29, 1995, between Benton Vinccler, C.A. and
International, as amended or extended.

     "Knowledge" means actual conscious awareness of factual information by an
individual listed on Schedule A-2.

     "Law" means any applicable constitution, statute, code, regulation, rule,
injunction, judgment, order, decree, ruling or law of any applicable
Governmental Authority.

     "Liability" means any liability or other obligation (whether known or
unknown, whether asserted or unasserted, whether absolute or contingent,
whether accrued or unaccrued, whether liquidated or unliquidated, and whether
due or to become due).



                                     -46-
<PAGE>   47

     "Lien" means any lien, charge, encumbrance, mortgage, conditional sale
agreement, title retention agreement, financing lease, pledge or security
interest of any kind or type and whether arising by Contract or under Law.

     "Material Adverse Effect" means, with respect to any Person or Persons,
any set of circumstances or events which is, or may reasonably be expected to
have, a material adverse effect upon the business, assets, condition (financial
or otherwise) or results of operations of such Person or Persons and its or
their Consolidated Subsidiaries, taken as a whole.

     "Nabors" means Nabors Industries, Inc., a Delaware corporation.

     "Nabors Class B Stock" means the Class B Stock, par value $.10 per share,
of Nabors.

     "Nabors Common Stock" means the Common  Stock, par value $.10 per share,
of Nabors.

     "Nabors Financial Statements" has the meaning set forth in Section 3(f).

     "Nabors Preferred Stock" means the Preferred Stock, par value $.10 per
share, of Nabors.

     "Nabors Reports" has the meaning set forth in Section 3(f).

     "OPC" means Occidental Petroleum Corporation, a Delaware corporation.

     "Ordinary Course of Business" means, with respect to any Person, the
ordinary course of business of such Person consistent with past custom and
practice (including with respect to quantity and frequency).

     "Owned" or "Owns" means, with respect to any of the Companies, those
assets, Contracts and Permits owned, leased, licensed or otherwise held by such
Company, but, with respect to assets, Contracts or Permits which shall be
jointly owned by such Company and a Person or Persons other than such Company,
then, in each case, only to the extent of the ownership interest of such
Company set forth in the Contracts relating thereto, and, with respect to
assets, Contracts or Permits which shall be licensed, leased or otherwise held
by such Company, then, in each case, only to the extent of the interest so
leased, licensed or otherwise held.

     "Oxy" means Occidental Oil and Gas Corporation, a California corporation.

     "Parent" means that corporation in the affiliated group of Oxy, which is
the common parent corporation for the filing of a consolidated U.S. tax return
for the affiliated group of companies, including Oxy and the Companies.



                                     -47-
<PAGE>   48

     "Parties" means Nabors and Oxy.

     "Permits" means any and all franchises, authorizations, licenses, permits,
approvals and orders (i) under any (a) federal, state, local or foreign
statute, ordinance or regulation, or (b) judgment of any court or other
administrative or governmental tribunal, or (ii) granted by any federal, state,
local or foreign administrative or governmental authority, bureau or agency.

     "Person" means any individual, corporation,  partnership, association,
joint stock company, trust, joint venture, unincorporated organization,
business or Governmental Authority, or other entity.

     "Profit Sharing Plans" means (i) the Exeter Drilling Company Amended and
Restated Profit Sharing Plan, and (ii) the J. W. Gibson Well Service Company
Profit Sharing Plan.

     "PUHCA" means the Public Utility Holding Company Act of 1940, as amended.

     "Purchase Price" has the meaning set forth in Section 1(b).

     "Real Property" means any real property (other than any Excluded Asset)
Owned by any of the Companies immediately prior to the Closing.

     "Real Property Title Defect" means, with respect to each parcel of real
property Owned by any of the Companies at the Closing, any defect in the real
estate title of such Company to such parcel such that the use by such Company
of such parcel after the Closing shall be materially impaired from the use
thereof by such Company at the Closing.

     "Reference Rate" means the rate of interest announced from time to time by
Bank of America National Trust and Savings Association, San Francisco,
California, as its reference rate, plus 1% per annum.

     "Salaried Employees" means all Employees who are paid on a basis other
than an hourly basis.

     "Sales Taxes" means all sales, use or similar taxes, including applicable
interest and penalties.

     "Securities Act" means the Securities Act of 1933, as amended.

     "Severance Program" means the Special Temporary Severance Program for
Certain Regular, Full-Time, Non-Union, Salaried Employees of Exeter Drilling
Company and Subsidiaries, as in effect on the date of this Agreement.



                                     -48-
<PAGE>   49

     "Special Matters" means (i) Liabilities for Taxes, (ii) Liabilities
arising under Environmental, Health and Safety Laws, and (iii) Liabilities
arising under Employee Benefit Plans, except, in each case, to the extent that
such Liabilities are expressly assumed by Nabors pursuant to this Agreement.

     "Statement of Consolidated Working Capital" has the meaning set forth in
Section 1(h).

     "Stock" has the meaning set forth in Section 2(d).

     "Subsidiary" means, with respect to any Person, any corporation,
association, partnership or other business entity, a majority (by number of
votes) of the Voting Securities of which is at the time owned by such Person or
by one or more of its Subsidiaries or by such Person and one or more of its
Subsidiaries.

     "Survival Period" means (i) five years after the Closing Date with respect
to any Special Matter which shall constitute (a) a Liability for Taxes, or (b)
a Liability arising under Employee Benefit Plans, (ii) seven years after the
Closing Date with respect to any Special Matter which shall constitute a
Liability arising under Environmental, Health and Safety Laws, (iii) five years
after the Closing Date with respect to the representations and warranties of
Oxy set forth in Section 2(d), 2(j) or 2(k), (iv) five years after the Closing
Date with respect to the representations and warranties of Nabors set forth in
Section 3(d), 3(f) and 3(k), (v) five years after the Closing Date with respect
to the covenants and agreements of Oxy and Nabors set forth in Section 5(e),
(vi) five years after the Closing Date with respect to all other Liabilities
referred to in clause (ii) or (iii) of Section 7(b), (vii) one year after the
Closing Date with respect to all of the other representations, warranties,
covenants and agreements of the Parties, and (viii) three years after the
Closing with respect to any Continuing Obligation.

     "Tax" means any federal, state, local, or foreign income, gross receipts,
license, payroll, employment, excise, severance, environmental (including taxes
under Code Sec. 59A), customs duties, capital stock, franchise, occupation,
business, profits, withholding, social security (or similar), employment,
unemployment, disability, real property, personal property, ad valorum, sales,
use, transfer, registration, alternative or add-on minimum, estimated, or other
tax, assessment, or governmental charge of any kind whatsoever, including any
interest, penalty or addition thereto, whether disputed or not.

     "Tax Return" means any return, declaration, report, claim for refund, or
information return or statement relating to Taxes, including any schedule or
attachment thereto, and including any amendment thereof.

     "Termination Date" means June 30, 1996.

     "Third Party Claim" has the meaning set forth in Section 7(d)(1).



                                     -49-
<PAGE>   50

     "Transfer Taxes" means all real estate transfer taxes, excise, documentary
and stamp taxes, and other similar impositions, including applicable interest
and penalties.

     "Vehicles" means all automobiles, trucks, rolling stock or other equipment
Owned by any of the Companies pursuant to the Wheels Lease.

     "Voting Securities" means stock or partnership interests of any class or
classes (however designated), the holders of which are at the time entitled, as
such holders, to vote for the election of a majority of the directors (or
persons performing similar functions) of the corporation, association,
partnership or other business entity in question, other than stock or
partnership interests having the right so to vote solely by reason of the
happening of a contingency.

     "Warrant" means the warrant, dated the Closing Date, of Nabors in the form
set forth in Exhibit B to the Agreement.

     "Warrant Exercise Price" means the Average Closing Price.

     "Warrant Expiration Date" means the fourth anniversary of the Closing
Date.

     "Warrant Shares" means 1,000,000 shares of the Nabors Common Stock, as
adjusted pursuant to the provisions of Section 1(e).

     "Wheels Lease" means the Lease, dated July 15, 1983, between Wheels, Inc.
and OPC.


                                     -50-
<PAGE>   51
                  AMENDMENT NO. 1 TO STOCK PURCHASE AGREEMENT


         This Amendment No. 1 to Stock Purchase Agreement, dated as of April
23, 1996, is by and between Nabors Industries, Inc., a Delaware corporation,
and Occidental Oil and Gas Corporation, a California corporation.

                                    RECITALS

         WHEREAS, Oxy (as such term and certain other terms used in this
Amendment with initial capital letters are defined in Section 1) and Nabors
have entered into the Stock Purchase Agreement providing, among other things,
for sale by Oxy to Nabors, and the purchase by Nabors from Oxy, of the Stock;
and

         WHEREAS, Nabors and Oxy are entering into this Amendment, pursuant to
the provisions of Section 4(p) of the Stock Purchase Agreement, in order to
provide for, among other things, the delivery by Nabors to Oxy, at the option
of Nabors and at the Closing, in lieu of the Warrant, of the Nabors Shares; and

         WHEREAS, the Parties desire to set forth certain representations,
warranties and covenants made by each to the other as an inducement to (i) the
entering into by the Parties of this Amendment, and (ii) the consummation of
the purchase by Nabors from Oxy, and the sale by Oxy to Nabors, of the Stock;

         NOW, THEREFORE, in consideration of the premises and of the mutual
promises herein set forth, the Parties agree as follows:

         1.      DEFINITIONS.  The definitions set forth or incorporated by
reference in Exhibit A to the Stock Purchase Agreement, as amended by this
Amendment, shall be applicable to this Amendment, including the recitals
hereto, as fully and to the same extent as if set forth herein, except as
otherwise expressly provided herein.  As used in this Amendment, the following
terms shall have the following meanings:

         "Amendment" means this Amendment No. 1 to Stock Purchase Agreement, as
the same may be amended pursuant to the provisions hereof.

         "Nabors" means Nabors Industries, Inc., a Delaware corporation.

         "Oxy" means Occidental Oil and Gas Corporation, a California
corporation.
<PAGE>   52
         "Stock Purchase Agreement" means the Stock Purchase Agreement, dated
as of March 8, 1996, between Nabors and Oxy.

         2.      AMENDMENTS TO THE STOCK PURCHASE AGREEMENT.

         (a)     SECTION 1(E).  The first sentence of Section 1(e) of the Stock
Purchase Agreement is hereby amended in its entirety to read as follows:

                 "(e)     WARRANT OR NABORS SHARES.  Nabors shall have the
         option to deliver to Oxy at the Closing, in lieu of the Warrant and as
         a part of the Consideration, a number of shares (rounded to the
         nearest whole share, with five-tenths of a share rounded upwards) of
         the Nabors Common Stock equal to the number obtained by dividing
         $4,000,000 by the Average Closing Price (the "Nabors Shares").  Such
         option may be exercised by Nabors by the delivery by Nabors to Oxy,
         not later than two Business Days prior to the Closing Date, of a
         notice to such effect specifying the number of the Nabors Shares to be
         so delivered.  At the Closing, in the event that Nabors shall have
         exercised the Nabors Option, Nabors will issue the Nabors Shares to
         Oxy.  At the Closing, unless Nabors shall have exercised the Nabors
         Option, Nabors will issue the Warrant, with the Warrant Exercise
         Price, the Warrant Expiration Date, and the Warrant Shares calculated
         or determined pursuant to the provisions of this Agreement duly
         inserted in the appropriate places thereon.".

         (b)     SECTION 1(G).  The last two lines of Section 1(g) of the Stock
Purchase Agreement are hereby amended in their entirety to read as follows:

          "powers, (iv), unless Nabors shall have exercised the Nabors Option,
         Nabors will deliver to Oxy the Warrant, duly executed by an authorized
         officer of Nabors, and (v), in the event that Nabors shall have
         exercised the Nabors Option, (A) Nabors will deliver to Oxy stock
         certificates representing the Nabors Shares, duly executed by
         authorized officers of Nabors and registered in the name of Oxy, and
         (B) Nabors will deliver to Oxy, and Oxy will deliver to Nabors, the
         Registration Rights Agreement, duly executed by an authorized officer
         of each such Party and with the number of the Nabors Shares calculated
         pursuant to the provisions of this Amendment duly inserted in the
         appropriate place thereon.".

         (c)     SECTION 2(N).  Section 2(n) of the Stock Purchase Agreement is
hereby amended in its entirety to read as follows:

                 "(n)     INVESTMENT INTENT.  Oxy understands and acknowledges
         that the Nabors Shares, the Warrant and the Nabors Common Stock into
         which the Warrant shall be exercisable have not been registered under
         the Securities Act or under the securities laws of any State.  Oxy (a)
         has such business experience that it is capable of evaluating the
         merits and risks of its investment in (1) the Nabors Shares, or (2)
         the Warrant and such Common Stock, and (b) is acquiring the Nabors
         Shares or the





                                      -2-
<PAGE>   53
         Warrant for its own account for the purpose of investment and not with
         a view to, or for sale or other disposition in connection with, any
         distribution thereof, except (a) in any offering covered by a
         registration statement under the Securities Act, or (b) pursuant to an
         applicable exemption under the Securities Act.".

         (d)     SECTION 2(P).  Section 2(p) of the Stock Purchase Agreement is
hereby amended in its entirety to read as follows:

                 "(p)     ACKNOWLEDGMENT CONCERNING NABORS REPRESENTATIONS AND
         WARRANTIES.  Oxy acknowledges and affirms that it has had the
         opportunity to complete its own independent investigation, analysis
         and evaluation of Nabors and the business, assets, liabilities and
         prospects of Nabors, that Oxy has been afforded the opportunity to
         inspect the assets of Nabors, that, in making its decision to acquire
         the Warrant or the Nabors Shares, Oxy has relied upon (i) its own
         independent investigation, analysis and evaluation of the businesses,
         assets, liabilities and prospects of Nabors, (ii) the representations
         and warranties of Nabors set forth in Section 3, and in Section 4 of
         the Amendment, and (iii) the covenants of Nabors set forth in Sections
         4 and 5, and in the Registration Rights Agreement, as a basis for such
         acquisition, and that Oxy has made all such reviews and inspections of
         the foregoing as it has deemed necessary or appropriate.".

         (e)     SECTION 2(Q).  Clause (1) of Section 2(q) of the Stock
Purchase Agreement is hereby amended in its entirety to read as follows:

                 "(1)     Except as and to the extent expressly set forth in
         this Section 2 or in Section 3 of the Amendment, included on any
         Schedule hereto or thereto or included in any writing delivered by Oxy
         to Nabors concurrently herewith or therewith or subsequent hereto or
         thereto expressly pursuant to this Agreement or the Amendment, Oxy
         makes no other representation or warranty and disclaims all liability
         and responsibility for any representation, warranty, statement or
         information (financial or otherwise) made or communicated (orally or
         in writing) to Nabors or any of its Affiliates, employees, agents,
         consultants or representatives (including, without limitation, any
         opinion, information, projection, financial statement or advice that
         may have been provided to Nabors by any officer, director, employee,
         agent, consultant or representative of Oxy or of any Affiliate
         thereof).".

         (f)     SECTION 3(D).  The last sentence of Section 3(d) of the Stock
Purchase Agreement is hereby amended in its entirety to read as follows:

         "Except (A) as contemplated by the Warrant or, in the event that
         Nabors shall have exercised the Nabors Option, the Registration Rights
         Agreement, or (B) as set forth on Schedule 3(d), there are no
         agreements or arrangements to which Nabors is a party pursuant to
         which Nabors is or could be required to register shares of the Nabors
         Common Stock under the Securities Act.".





                                      -3-
<PAGE>   54
         (g)     SECTION 3(J).  Section 3(j) of the Stock Purchase Agreement is
hereby amended in its entirety to read as follows:

                 "(j)     ABILITY TO PAY.  Nabors has available sufficient
         funds to pay the Cash Portion of the Purchase Price, together with all
         costs and expenses relevant thereto, and otherwise to perform its
         obligations under this Agreement, the Amendment, the Warrant and the
         Registration Rights Agreement.".

         (h)     SECTION 3(M).  Section 3(m) of the Stock Purchase Agreement is
hereby amended in its entirety to read as follows:

                 "(m)     ACKNOWLEDGMENT CONCERNING OXY REPRESENTATIONS AND
         WARRANTIES.  Nabors acknowledges and affirms that it has had the
         opportunity to complete its own independent investigation, analysis
         and evaluation of the Companies and the respective businesses, assets,
         liabilities and prospects of the Companies, that Nabors has been
         afforded the opportunity to inspect the assets of the Companies, that
         any prior financial information delivered by Oxy or any of its
         Affiliates to Nabors will be superseded by the Financial Statements,
         that, in making its decision to enter into this Agreement and the
         Amendment and to consummate the transactions contemplated hereby,
         Nabors has not relied upon such financial information or the Financial
         Statements but upon (i) its own independent investigation, analysis
         and evaluation of the businesses, assets, liabilities and prospects of
         the Companies, (ii) the representations and warranties of Oxy set
         forth in Section 2, and in Section 3 of the Amendment, and (iii) the
         covenants of Oxy set forth in Sections 4 and 5, and in the
         Registration Rights Agreement, as a basis for entering into this
         Agreement and the Amendment and the consummation of such transactions,
         and that Nabors has made all such reviews and inspections of the
         foregoing as it has deemed necessary or appropriate.".

         (i)     SECTION 3(N).  Clause (1) of Section 3(n) of the Stock
Purchase Agreement is hereby amended in its entirety to read as follows:

                 "(1)     Except as and to the extent expressly set forth in
         this Section 3 or in Section 4 of the Amendment, included on any
         Schedule hereto or thereto or included in any writing delivered by
         Nabors to Oxy concurrently herewith or therewith or subsequent hereto
         or thereto expressly pursuant to this Agreement or the Amendment,
         Nabors makes no other representation or warranty and disclaims all
         liability and responsibility for any representation, warranty,
         statement or information (financial or otherwise) made or communicated
         (orally or in writing) to Oxy or any of its Affiliates, employees,
         agents, consultants or representatives (including, without limitation,
         any opinion, information, projection, financial statement or advice
         that may have been provided to Oxy by any officer, director, employee,
         agent, consultant or representative of Nabors or of any Affiliate
         thereof).".





                                      -4-
<PAGE>   55
         (j)     SECTION 4(B).  The third sentence of Section 4(b) of the Stock
Purchase Agreement is hereby amended in its entirety to read as follows:

         "Each of the Parties will (and Oxy will cause each of the Companies
         to) give any notices to, make any filings with, and use all reasonable
         commercial efforts to obtain any authorizations, consents and
         approvals of Governmental Authorities in connection with the matters
         referred to in (i) Sections 2(b) and 3(b), and (ii) Sections 3(b) and
         4(b) of the Amendment.".

         (k)     SECTION 4(C).  Clause (g) of Section 4(c)(y) of the Stock
Purchase Agreement is hereby amended by adding the words "to any Person (other
than any of the Companies)" immediately after the word "assign" appearing in
such clause.

         (l)     SECTION 4(F).  Section 4(f) of the Stock Purchase Agreement is
hereby amended in its entirety to read as follows:

                 "(f)     NOTICE OF BREACH.  Each Party will give prompt
         written notice to the other Party of any event, fact or condition
         which constitutes a material breach by the first Party of any of its
         representations, warranties or agreements set forth in this Agreement
         or the Amendment.".

         (m)     SECTION 4(N).  Section 4(n) of the Stock Purchase Agreement is
hereby amended by adding the following clause immediately after the word
"transfer" appearing in the last line of such paragraph:

         "; and, provided, further, that, in lieu of any such assignment or
         transfer of either of the Office Leases listed as item 1 or 3 on
         Schedule A-1, Oxy may cause such Office Lease to terminate no later
         than the Closing Date".

         (n)      SECTION 4(P).  Section 4(p) of the Stock Purchase Agreement is
hereby deleted in its entirety.

         (o)      SECTION 6(A).

         (1)      Clauses (1) through (3) of Section 6(a) of the Stock Purchase
Agreement are hereby amended in their entirety to read as follows:

                 "(1)     Oxy shall have furnished Nabors at the Closing with
         certified copies of resolutions duly adopted by the Board of Directors
         of Oxy, which resolutions shall authorize the execution, delivery and
         performance by Oxy of this Agreement and the Amendment;





                                      -5-
<PAGE>   56
                 (2)      The representations and warranties of Oxy set forth
         in Section 2 (as amended by the Amendment), and in Section 3 of the
         Amendment, shall be true and correct in all material respects as of
         the Closing with the same effect as though such representations and
         warranties had been made as of the Closing (except (i) to the extent
         that such representations and warranties expressly relate to an
         earlier date, (ii) as contemplated by this Agreement or the Amendment,
         (iii) any such representation or warranty relating to the Warrant in
         the event that Nabors shall have exercised the Nabors Option, or (iv)
         any such representation or warranty relating to the Registration
         Rights Agreement and the Nabors Shares unless Nabors shall have
         exercised the Nabors Option);

                 (3)      Oxy shall have performed and complied with, in each
         case in all material respects, all of the covenants and agreements
         required of it by this Agreement and the Amendment as of the
         Closing;".

         (2)     Clause (6) of Section 6(a) of the Stock Purchase Agreement is
hereby amended in its entirety to read as follows:

                 "(6)     Oxy shall have delivered to Nabors (i) stock
         certificates representing the Stock, endorsed in blank or accompanied
         by duly executed stock powers, and (ii), in the event that Nabors
         shall have exercised the Nabors Option, the Registration Rights
         Agreement referred to in clause (v) of Section 1(g);".

         (3)     Clause (10) of Section 6(a) of the Stock Purchase Agreement is
hereby amended in its entirety to read as follows:

                 "(10)    Nabors shall have received from (i) Robert E. Sawyer,
         Esq., an Associate General Counsel of OPC and counsel to Oxy and its
         Affiliates in connection with this transaction, an opinion, dated the
         Closing Date, in form and substance as set forth in Schedule
         6(a)(10)(i), which opinion shall (A), unless Nabors shall have
         exercised the Nabors Option, not contain the language appearing in
         brackets in such Schedule 6(a)(10)(i), and (B), in the event that
         Nabors shall have exercised the Nabors Option, contain such language
         (without such brackets), and (ii) Woodburn and Wedge, special Nevada
         counsel to Oxy in connection with this transaction, an opinion, dated
         the Closing Date, in form and substance as set forth in Schedule
         6(a)(10)(ii); and".

         (p)     SECTION 6(B).

         (1)     Clauses (1) through (3) of Section 6(b) of the Stock Purchase
Agreement are hereby amended in their entirety to read as follows:

                 "(1)     Nabors shall have furnished Oxy at the Closing with
         certified copies of resolutions duly adopted by the Board of Directors
         of Nabors, which resolutions shall





                                      -6-
<PAGE>   57
         authorize the execution, delivery and performance by Nabors of this 
         Agreement and the Amendment;

                 "(2)     The representations and warranties of Nabors set
         forth in Section 3 (as amended by the Amendment), and in Section 4 of
         the Amendment, shall be true and correct in all material respects as
         of the Closing with the same effect as though such representations and
         warranties had been made as of the Closing (except (i) to the extent
         that such representations and warranties expressly relate to an
         earlier date, (ii) as contemplated by this Agreement or the Amendment,
         (iii) any such representation or warranty relating to the Warrant in
         the event that Nabors shall have exercised the Nabors Option, or (iv)
         any such representation or warranty relating to the Registration
         Rights Agreement and the Nabors Shares unless Nabors shall have
         exercised the Nabors Option);

                 "(3)     Nabors shall have performed and complied with, in
         each case in all material respects, all of the covenants and
         agreements required of it by this Agreement and the Amendment as of
         the Closing;".

         (2)     Clauses (5) and (6) of Section 6(b) of the Stock Purchase
Agreement are hereby amended in their entirety to read as follows:

                 "(5)     No action, suit or proceeding shall be pending before
         any court or quasi-judicial or administrative agency of any federal,
         state, local or foreign jurisdiction wherein an unfavorable
         injunction, judgment, order, decree, ruling or charge would (i)
         prevent consummation of any of the transactions contemplated by this
         Agreement, (ii) cause any of such transactions to be rescinded
         following consummation, or (iii) affect adversely the right of Oxy to
         own (A), unless Nabors shall have exercised the Nabors Option, the
         Warrant, or (B), in the event that Nabors shall have exercised the
         Nabors Option, the Nabors Shares (and no such injunction, judgment,
         order, decree, ruling or charge shall be in effect);

                  (6)     Nabors shall have delivered to Oxy at the Closing (i)
         the Estimated Cash Portion of the Purchase Price, (ii), unless Nabors
         shall have exercised the Nabors Option, the Warrant duly executed by
         an authorized officer of Nabors, and (iii), in the event that Nabors
         shall have exercised the Nabors Option, the documents referred to in
         clause (v) of Section 1(g);".

         (3)     Clause (10) of Section 6(b) of the Stock Purchase Agreement is
hereby amended in its entirety to read as follows:

                 "(10)    Oxy shall have received from Baker & McKenzie,
         counsel to Nabors, an opinion, dated the Closing Date, in form and
         substance as set forth in Schedule 6(b)(10), which opinion shall (i),
         unless Nabors shall have exercised the Nabors Option, not contain the
         language appearing in brackets in such Schedule 6(b)(10)





                                      -7-
<PAGE>   58
         (other than any references to the Warrants so appearing therein), and
         (ii), in the event that Nabors shall have exercised the Nabors Option,
         contain such language (without such brackets) (other than any such
         references to the Warrants); and".

         (q)     SECTION 6(C).  Section 6(c) of the Stock Purchase Agreement is
hereby amended in its entirety to read as follows:

                 "(c)     WAIVER OF BREACH.  In the event of any breach by any
         Party of any of the representations, warranties, covenants or
         agreements of such Party contained in this Agreement or the Amendment
         (whether notice of such breach shall be set forth in any certificate
         furnished pursuant to the provisions of Section 6(a)(7) or 6(b)(8) or
         otherwise), the other Party may elect to consummate the purchase and
         sale of the Stock hereunder, and, upon any such election, (i) the
         Parties may enter into a mutually acceptable amendment to this
         Agreement addressing such breach and any other matters related
         thereto, or (ii) such other Party shall unilaterally waive such
         breach; provided, however, that in no event shall the Party
         responsible for such breach be required to enter into any such
         amendment unless such amendment provides that such breach shall be
         deemed unconditionally waived by such other Party for all purposes of
         this Agreement and the Amendment.".

         (r)     SECTION 7(A).  Section 7(a) of the Stock Purchase Agreement is
hereby amended in its entirety to read as follows:

                 "(a)     SURVIVAL OF REPRESENTATIONS AND WARRANTIES.  Each of
         the representations and warranties of the Parties contained in
         Sections 2 and 3, and in Sections 3 and 4 of the Amendment (in each
         case as confirmed by the certificates delivered pursuant to the
         provisions of Sections 6(a)(7) and 6(b)(8)), and all of the covenants
         in Section 5(e), shall survive the Closing hereunder for the Survival
         Period, after which they shall terminate and be of no further force or
         effect, and each of the other covenants set forth in this Agreement
         and the Amendment shall survive the Closing hereunder.".

         (s)     SECTION 7(B).  Clause (i) of Section 7(b) of the Stock
Purchase Agreement is hereby amended in its entirety to read as follows:

                 "(i)     any breach or nonperformance, either partial or
         total, by Oxy of any representation, warranty, covenant or agreement
         of Oxy set forth in this Agreement or the Amendment, or in any
         certificate delivered by Oxy pursuant to the provisions of Section
         6(a)(7);".

         (t)     SECTION 7(C).  Clause (i) of Section 7(c) of the Stock
Purchase Agreement is hereby amended in its entirety to read as follows:





                                      -8-
<PAGE>   59
                 "(i)      any breach or non-performance, either partial or
         total, by Nabors of any representation, warranty, covenant or
         agreement of Nabors set forth in this Agreement or the Amendment, or
         in any certificate delivered by Nabors pursuant to the provisions of
         Section 6(b)(8); and".

         (u)     SECTION 7(G).  Section 7(g) of the Stock Purchase Agreement is
hereby amended in its entirety to read as follows:

                 "(g)     SOLE REMEDY FOR BREACHES.  Following the Closing, the
         foregoing indemnification provisions will be the sole remedy of the
         Parties for breaches of the representations, warranties, covenants or
         agreements contained herein or in the Amendment, and each Party hereby
         waives any other statutory, equitable or common law remedy which such
         Party would otherwise have for any such breach.".

         (v)     SECTION 8(A).

         (1)     Clause (i) of Section 8(a)(2) of the Stock Purchase Agreement
is hereby amended in its entirety to read as follows:

         "(i) in the event that Oxy has breached any representation, warranty,
         covenant or agreement contained in this Agreement or the Amendment in
         any material respect, Nabors has notified Oxy of such breach, and such
         breach has continued without cure for a period of 30 days after such
         notice, or".

         (2)     Clause (i) of Section 8(a)(3) of the Stock Purchase Agreement
is hereby amended in its entirety to read as follows:

         "(i) in the event that Nabors has breached any representation,
         warranty, covenant or agreement contained in this Agreement or the
         Amendment in any material respect, Oxy has notified Nabors of such
         breach, and such breach has continued without cure for a period of 30
         days after such notice, or".

         (w)     SECTION 8(B).    The proviso to Section 8(b) of the Stock
Purchase Agreement is hereby amended in its entirety to read as follows:

         "provided, however, that any termination pursuant to Section 8(a)(2)
         or 8(a)(3) shall not relieve any Party of any Liability to the other
         Party for any willful or intentional breach of this Agreement or the
         Amendment occurring prior to such termination, and no such termination
         shall be deemed to be a waiver of any applicable remedy for any such
         breach.".

         (x)     SECTION 9(I).  The eleventh line of Section 9(i) of the Stock
Purchase Agreement is hereby amended in its entirety to read as follows:





                                      -9-
<PAGE>   60
         "brought in an inconvenient forum, and (c) the right to object, with
         respect to any such claim,".

         (y)     REGISTRATION RIGHTS AGREEMENT.  The Stock Purchase Agreement
is hereby amended to add Attachment A attached hereto as Exhibit C to the Stock
Purchase Agreement.

         (z)     EXHIBIT A TO THE STOCK PURCHASE AGREEMENT.

         (1)     The definition of "Agreement" appearing in Exhibit A to the
Stock Purchase Agreement is hereby amended in its entirety to read as follows:

                 "'Agreement' means the Agreement to which this Exhibit is
         attached, as amended by the Amendment and as such Agreement may be
         further amended pursuant to the provisions thereof.".

         (2)     The following definition of "Amendment" is hereby added
between the definition of "Agreement" and the definition of "Assets" appearing
in Exhibit A to the Stock Purchase Agreement:

                 "'Amendment' means Amendment No. 1 to Stock Purchase
         Agreement, dated as of April 23, 1996, between Nabors and Oxy.".

         (3)     The definition of "Consideration" appearing in Exhibit A to
the Stock Purchase Agreement is hereby amended in its entirety to read as
follows:

                 "'Consideration' means the consideration for the Stock
         comprising the Cash Portion of the Purchase Price and (i), unless
         Nabors shall have exercised the Nabors Option, the Warrant, and (ii),
         in the event that Nabors shall have exercised the Nabors Option, the
         Nabors Shares.".

         (4)     The last two lines of the definition of "Excluded Assets"
appearing in Exhibit A to the Stock Purchase Agreement are hereby amended in
their entirety to read as follows:

         "offices of Exeter in Denver, Colorado (other than 8 office furniture
         sets, a conference table and 15 conference room side chairs selected
         by Nabors).".

         (5)     The following definition of "Nabors Option" is hereby added
between the definition of "Nabors Financial Statements" and the definition of
"Nabors Preferred Stock" appearing in Exhibit A to the Stock Purchase
Agreement:
  
                 "'Nabors Option' means the option of Nabors set forth in
         Section 1(e).".





                                      -10-
<PAGE>   61
         (6)     The following definition of "Nabors Shares" is hereby added
between the definition of "Nabors Reports" and the definition of "OPC"
appearing in Exhibit A to the Stock Purchase Agreement:

                 "'Nabors Shares' has the meaning set forth in Section 1(e).".

         (7)     The following definition of "Registration Rights Agreement" is
hereby added between the definition of "Reference Rate" and the definition of
"Salaried Employees" appearing in Exhibit A to the Stock Purchase Agreement:

                 "'Registration Rights Agreement' means the Registration Rights
         Agreement, dated the Closing Date, between Nabors and Oxy in the form
         set forth in Exhibit C to the Agreement.".

         (8)     The definition of "Survival Period" appearing in Exhibit A to
the Stock Purchase Agreement is hereby amended in its entirety to read as
follows:

                  "'Survival Period' means (i) five years after the Closing
         Date with respect to any Special Matter which shall constitute (a) a
         Liability for Taxes, or (b) a Liability arising under Employee Benefit
         Plans, (ii) seven years after the Closing Date with respect to any
         Special Matter which shall constitute a Liability arising under
         Environmental, Health and Safety Laws, (iii) five years after the
         Closing Date with respect to the representations and warranties of Oxy
         set forth in Section 2(d), 2(j) or 2(k), (iv) five years after the
         Closing Date with respect to the representations and warranties of
         Nabors set forth in (1) Section 3(d), 3(f) or 3(k), and (2) Section
         4(c) of the Amendment, (v) five years after the Closing Date with
         respect to the covenants and agreements of Oxy and Nabors set forth in
         Section 5(e), (vi) five years after the Closing Date with respect to
         all other Liabilities referred to in clause (ii) or (iii) of Section
         7(b), (vii) one year after the Closing Date with respect to all of the
         other representations and warranties of the Parties set forth in this
         Agreement or the Amendment, and (viii) three years after the Closing
         with respect to any Liability that is a Continuing Obligation.".

         (aa)    EXHIBIT B TO THE STOCK PURCHASE AGREEMENT.

         (1)     Section 1.1 of Exhibit B to the Stock Purchase Agreement is
hereby amended by capitalizing the initial letter of the words "person" and
"person's" in each place that such words appear in such Section 1.1.

         (2)     Section 1.4 of Exhibit B to the Stock Purchase Agreement is
hereby amended by capitalizing the initial letter of the word "person"
appearing in the fifth line of such Section 1.4.





                                      -11-
<PAGE>   62
         (3)     Section 1.5 of Exhibit B to the Stock Purchase Agreement is
hereby amended by capitalizing the initial letter of the word "persons"
appearing in the eleventh line of such Section 1.5 and the word "person"
appearing in the seventeenth line of such Section 1.5.

         (4)     Section 1.13 of Exhibit B to the Stock Purchase Agreement is
hereby amended by capitalizing the initial letter of the word "person" in each
place that it appears in such Section 1.13.

         (5)     Section 2.1(a) of Exhibit B to the Stock Purchase Agreement is
hereby amended by:

         (A)     deleting the word "Holders" appearing in the second line of
such Section 2.1(a) and adding the word "holders" in lieu thereof;

         (B)     deleting the words "from OXY" appearing in the sixth line of
such Section and adding the words "by such holders" in lieu thereof;

         (C)      capitalizing the initial letter of the word "person"
appearing in the eighth line of such Section 2.1(a);

         (D)     deleting the words "Section 1" appearing in the eighth line of
such Section 2.1(a) and adding the words "Section 2.1" in lieu thereof;

         (E)     deleting the comma appearing after the words "Section 2.1(a)"
in the penultimate sentence of such Section 2.1(a); and

         (F)     deleting the word "Shares" appearing in such penultimate
sentence and inserting the word "Securities" in lieu thereof.

         (6)     The first paragraph of Section 2.2 of Exhibit B to the Stock
Purchase Agreement is hereby amended by:

         (A)     adding a comma between the words "that" and "without"
appearing in the seventh line of such paragraph;

         (B)     capitalizing the initial letter of the word "persons"
appearing in the tenth line of such paragraph; and

         (C)     capitalizing the initial letter of the word "person" appearing
in the eleventh line of such paragraph.

         (7)     Section 2.2(b) of Exhibit B to the Stock Purchase Agreement is
hereby amended by:





                                      -12-
<PAGE>   63
         (A)     adding the words ", subject to Section 2.1(b)," immediately
after the word "Company" appearing in the second line of such Section 2.2(b);
and

         (B)     deleting the word "Shares" appearing in the sixth line of such
Section 2.2(b) and adding the word "Securities" in lieu thereof.

         (8)     Section 2.2 of Exhibit B to the Stock Purchase Agreement is
hereby amended by adding the following clause (c) immediately after clause (b)
of such Section 2.2:

                 "(c)  The procedures set forth in Section 2.3 (other than
         those set forth in Section 2.3(a), (b), (d) or (e)) shall apply to any
         registration that involves a Piggy-Back Shareholder pursuant to this
         Section 2.2.".

         (9)     Section 2.3 of Exhibit B to the Stock Purchase Agreement is
hereby amended by deleting the word "Sections" appearing in the sixth line of
such Section 2.3 and adding the word "Section" in lieu thereof.

         (10)    Section 2.3(b) of Exhibit B to the Stock Purchase Agreement is
hereby amended by deleting the number "90" appearing in the last line of such
Section 2.3(b) and adding the number "120" in lieu thereof.

         (11)    Section 2.3(c) of Exhibit B to the Stock Purchase Agreement is
hereby amended by:

         (A)     deleting the words "and (3)" appearing in the penultimate line
of such Section 2.3(c) and adding the words "(3) such number of copies of" in
lieu thereof; and

         (B)     adding the words "(4) such number of copies of" immediately
after the word "and" appearing in the last line of such Section 2.3(c).

         (12)    Section 2.3(d) of Exhibit B to the Stock Purchase Agreement is
hereby amended by deleting the word "to" appearing in the third line of such
Section 2.3(d);.

         (13)    The first line of Section 2.3(e) of Exhibit B to the Stock
Purchase Agreement is hereby amended by adding the words "to each seller of the
Registrable Securities and" immediately after the word "furnish" appearing in
such line.

         (14)    Section 2.3(g) of Exhibit B to the Stock Purchase Agreement is
hereby amended by:

         (A)     adding the words "and Rule 158" immediately after the words
"Section 11(a)" appearing in such Section 2.3(g); and





                                      -13-
<PAGE>   64
         (B)     deleting the word "of" appearing after the word "Act" in the
penultimate line of such Section 2.3(g) and adding the word "or" in lieu
thereof.

         (15)    Section 2.3(h) of Exhibit B to the Stock Purchase Agreement is
hereby amended by adding the word "and" at the end of such Section 2.3(h).

         (16)    Section 2.4(a) of Exhibit B to the Stock Purchase Agreement is
hereby amended by deleting the words "Section 2" appearing in the ninth line of
such Section and adding the words "Section 2.4(a)" in lieu thereof.

         (17)    Section 2.4(b) of Exhibit B to the Stock Purchase Agreement is
hereby amended by deleting the word "Holder" appearing in the first line of
such Section 2.4(b) and adding the words "Each holder of Registrable
Securities" in lieu thereof.

         (18)    Section 2.5 of Exhibit B to the Stock Purchase Agreement is
hereby amended by:

         (A)     deleting the word "Section" appearing in the second line of
such Section 2.5 and adding the word "Article" in lieu thereof; and

         (B)     deleting the words "Registering Shareholder" appearing in the
third line of such Section 2.5 and adding the words "to each seller of the
Registrable Securities" in lieu thereof.

         (19)    Section 2.6 of Exhibit B to the Stock Purchase Agreement is
hereby amended by deleting the words "Registering Shareholder" appearing in the
last line of such Section 2.6 and adding the words "seller of the Registrable
Securities" in lieu thereof.

         (20)    Section 2.7(a) of Exhibit B to the Stock Purchase Agreement is
hereby amended by:

         (A)      deleting the words "Registering Shareholder" in each place
that it appears in such Section 2.7(a) and adding the words "seller of the
Registrable Securities" in lieu thereof;

         (B)     deleting the comma after the word "fees" appearing in the
fifth line of such Section 2.7(a);

         (C)     adding the words "covering such Registrable Securities"
immediately after the word "thereto)" appearing in the ninth line of such
Section 2.7(a);

         (D)     deleting the words "arising out of or" appearing in the
thirteenth line of such Section 2.7(a) and adding the words "arise out of or
are" in lieu thereof; and





                                      -14-
<PAGE>   65
         (E)     deleting the word "Section" appearing in each of the sixteenth
and twenty-first lines of such Section 2.7(a) and adding the word "Article" in
lieu thereof.

         (21)    Section 2.7(b) of Exhibit B to the Stock Purchase Agreement is
hereby amended by:

         (A)     deleting the words "Registering Shareholder" appearing in the
first line of such Section 2.7(b) and adding the words "seller of the
Registrable Securities, severally and not jointly," in lieu thereof;

         (B)     deleting the comma after the word "fees" appearing in the
fourth line of such Section 2.7(b);

         (C)     deleting the word "the" before the word "registration"
appearing in the seventh line of such Section 2.7(b) and adding the word "such"
in lieu thereof;

         (D)     deleting the words "Registering Shareholder" appearing in the
tenth line of such Section 2.7(b) and adding the words "seller of the
Registrable Securities" in lieu thereof; and

         (E)     deleting the words "Registering Shareholder's" appearing in
the eleventh line of such Section 2.7(b) and adding the words "seller's" in
lieu thereof.

         (22)    Section 2.7(c) of Exhibit B to the Stock Purchase Agreement is
hereby amended by:

         (A)     deleting the word "party" in each place that it appears in
such Section 2.7(c) and adding the word "Person" in lieu thereof;

         (B)     deleting the word "party's" appearing in the third line of
such Section 2.7(c) and adding the word "Person's" in lieu thereof;

         (C)     deleting the word "parties" in each place that it appears in
such Section 2.7(c) and adding the word "Persons" in lieu thereof; and

         (D)     deleting the word "Section" appearing in the eleventh line of
such Section 2.7(c) and adding the word "Article" in lieu thereof.

         (23)    Section 2.7(d) of Exhibit B to the Stock Purchase Agreement is
hereby amended by:

         (A)     deleting the word "the Registering Shareholder" appearing in
the second line of such Section 2.7(d) and adding the words "any seller of the
Registrable Securities" in lieu thereof;





                                      -15-
<PAGE>   66
         (B)     deleting the word "party" in each place that it appears in
such Section 2.7(d) and adding the word "Person" in lieu thereof;

         (C)     capitalizing the initial letter of the words "person" and
"persons'" in each place that such words appear in such Section 2.7(d); and

         (D)     deleting the words "Section 2.8" appearing in the last line of
such Section 2.7(d) and adding the words "Section 2.7" in lieu thereof.

         (24)    Section 2.7(e) of Exhibit B to the Stock Purchase Agreement is
hereby amended by deleting the word "party" appearing in each of the first and
second lines of such Section 2.7(e) and adding the word "Person" in lieu
thereof.

         (25)    Section 2.9 of Exhibit B to the Stock Purchase Agreement is
hereby amended by deleting the word "corporation" appearing in the third line
of such Section 2.9 and adding the word "consolidation" in lieu thereof.

         (26)    Section 3.1 of Exhibit B to the Stock Purchase Agreement is
hereby amended by:

         (A)     deleting the word "Section" appearing in each of the first and
ninth lines of such Section 3.1 and adding the word "Article" in lieu thereof;
and

         (B)     deleting the words "for Common Stock issued upon the exercise
of this Warrant, and each certificate issued upon the transfer of any such
Common Stock" appearing in the ninth and tenth lines of such Section 3.1 and
adding the words "evidencing the Registrable Securities" in lieu thereof.

         (27)    Section 3.2 of Exhibit B to the Stock Purchase Agreement is
hereby amended by deleting the word "Section" appearing in the first line of
such Section 3.2 and adding the word "Article" in lieu thereof.

         (28)    Section 5 of Exhibit B to the Stock Purchase Agreement is
hereby amended by adding the following at the end of the second sentence
thereof:

         ", and all such shares of Common Stock will be listed on a national
         exchange and on each additional national securities exchange on which
         similar securities issued by the Company are then listed or the
         National Market System of the NASD, if the listing of such shares is
         then permitted under the rules of such exchange or the National Market
         System of the NASD.".

         (29)    Section 8 of Exhibit B to the Stock Purchase Agreement is
hereby amended in its entirety to read as follows:





                                      -16-
<PAGE>   67
                 "8.      Notices.  All notices and other communications
         hereunder shall be in writing and shall be sent by (i) personal
         delivery (including courier service), (ii) telecopier during normal
         business hours to the number indicated below, or (iii) first class or
         registered or certified mail, postage prepaid, and addressed as
         follows:

                 If to Oxy at:

                 Occidental Oil and Gas Corporation
                 1200 Discovery Drive
                 Bakersfield, California 93309-7008
                 Attention:  Executive Vice President and
                                Chief Financial Officer
                 Telecopier:  (805) 322-7457

                 With a copy to:

                 Occidental Petroleum Corporation
                 10889 Wilshire Boulevard
                 Los Angeles, California 90024
                 Attention:  Vice President - Operations
                 Telecopier: (310)  443-6331

                 If to Nabors at:

                 Nabors Industries, Inc.
                 515 West Greens Road, Suite 1200
                 Houston, Texas 77067
                 Attention: Anthony G. Petrello, President
                 Telecopier No.: (713) 872-5205

                 With a copy to:

                 Baker & McKenzie
                 805 Third Avenue
                 New York, New York 10022
                 Attention: Howard M. Berkower
                 Telecopier: (212) 759-9133.

                 Nabors or any Holder (or any holder of the registration rights
         set forth in Article 2) may change or add its address or telecopier
         number to which notices and other communications hereunder are to be
         delivered by giving Nabors or such Holder (or such holder), as the
         case may be, notice in the manner herein set forth. Each notice and
         other communication shall be effective (1) if given by telecopy, when
         the telecopy





                                      -17-
<PAGE>   68
         is transmitted to the proper address and the receipt of the
         transmission is confirmed, (2) if given by mail, 72 hours after the
         notice or other communication is deposited in the mail properly
         addressed with first class postage prepaid, or (3) if given by any
         other means, when delivered to the proper address and a written
         acknowledgment of delivery is received.".

         (30)    The first line of Section 9(a) of Exhibit B to the Stock
Purchase Agreement is hereby amended by deleting the word "to" appearing after
the word "failure" in such line and adding the word "or" in lieu thereof.

         (31)    Section 9(b) of Exhibit B to the Stock Purchase Agreement is
hereby amended in its entirety to read as follows:

                 "(b)     In view of the uniqueness of the Warrants and the
         registration rights set forth in Article 2, neither the Holder nor any
         holder of registration rights set forth in Article 2 would have an
         adequate remedy at law for money damages in the event that any of the
         obligations arising under the Warrants or such registration rights is
         not performed in accordance with its terms, and the Company therefore
         agrees that the Holder and any holder of registration rights set forth
         in Article 2 shall be entitled to specific enforcement of the terms of
         the Warrants and such registration rights in addition to any other
         remedy to which they may be entitled at law or in equity.".

         (32)    Section 10 of Exhibit B to the Stock Purchase Agreement is
hereby amended by:

         (A)     deleting the words "a" and "the" appearing in the second line
of such Section 10 and adding, in each case, the word "this" in lieu thereof;

         (B)     deleting the word "and" appearing after the word "Company" in
the third line of such Section 10 and adding a comma in lieu thereof;

         (C)     adding the words "and any holder of registration rights set
forth in Section 2" immediately after the word "Holder" appearing in the third
line of such Section 10; and

         (D)     adding the words "and any such holder" immediately after the
word "Holder" appearing in the fifth line of such Section 10.

         (33)    The definition of "Affiliate" appearing in Section 14 of
Exhibit B to the Stock Purchase Agreement is hereby amended in its entirety to
read as follows:

                 "Affiliate: Any Person that is an "affiliate" within the
         meaning of the regulations promulgated under the Securities Act, as
         such regulations and Act shall be amended and in effect on the date of
         this Warrant.".





                                      -18-
<PAGE>   69
         (34)    The definition of "Equity Securities" appearing in Section 14
of Exhibit B to the Stock Purchase Agreement is hereby amended in its entirety
to read as follows:

                 "Equity Securities: of any Person means the capital or voting
         stock of such Person and all other securities convertible into, or
         exchangeable or exercisable for, any shares of such capital or voting
         stock, all rights to subscribe for or to purchase, all options and
         warrants for the purchase of, and all calls, commitments or claims of
         any character relating to, any shares of such capital or voting stock,
         all equity equivalents, interests in the ownership or earnings or
         other similar rights of, or with respect to, such Person, and any
         securities convertible into or exchangeable or exercisable for any of
         the foregoing.".

         (35)    The definition of "Registrable Securities" appearing in
Section 14 of Exhibit B to the Stock Purchase Agreement is hereby amended by
deleting the words "or when such securities may be resold pursuant to Rule 144
(as amended from time to time) without compliance with the volume and manner of
sale restrictions set forth in such Rule," appearing in the sixth and seventh
lines of such definition.

         (36)    The definition of "Registration Expenses" appearing in Section
14 of Exhibit B to the Stock Purchase Agreement is hereby deleted in its
entirety.

         (37)    The following Section 15 is hereby added to Exhibit B to the
Stock Purchase Agreement immediately after Section 14 thereof:

                 "15.     Successors and Assigns.  The terms of this Warrant
         shall be binding upon and inure to the benefit of (i) Nabors and its
         successors and assigns, and (ii) Holder and any holder of the
         registration rights set forth in Article 2, and their respective
         successors and assigns.  NOTHING IN THIS WARRANT, EXPRESS OR IMPLIED,
         IS INTENDED TO CONFER UPON ANY PERSON, OTHER THAN NABORS, HOLDER AND
         ANY HOLDER OF THE REGISTRATION RIGHTS SET FORTH IN ARTICLE 2, AND
         THEIR RESPECTIVE SUCCESSORS AND ASSIGNS, ANY RIGHTS, REMEDIES OR
         OBLIGATIONS UNDER, OR BY REASON OF, THIS WARRANT.".

         (bb)    SCHEDULE 6(A)(10)(I).  Schedule 6(a)(10)(i) of the Stock
Purchase Agreement is hereby deleted in its entirety, and Schedule 6(a)(10)(i)
attached hereto is hereby substituted in lieu thereof.

         (cc)    SCHEDULE 6(A)(10)(II). The second and third lines of the first
paragraph appearing in Schedule 6(a)(10)(ii) of the Stock Purchase Agreement
are hereby amended in their entirety to read as follows:

         "California corporation (the "Seller"), in connection with the Stock
         Purchase Agreement, dated as of March 8, 1996, as amended by Amendment
         No. 1 to Stock





                                      -19-
<PAGE>   70
         Purchase Agreement, dated as of April 23, 1996 (the "Purchase
         Agreement"), by and between the Seller and Nabors".

         (dd)    SCHEDULE 6(B)(10).  Schedule 6(b)(10) of the Stock Purchase
Agreement is hereby deleted in its entirety, and Schedule 6(b)(10) attached
hereto is hereby substituted in lieu thereof.

         3.      REPRESENTATIONS AND WARRANTIES OF OXY.

         Oxy represents and warrants to Nabors that:

         (a)     AUTHORIZATION OF TRANSACTION BY OXY.  Oxy has all requisite
corporate power and authority to execute and to deliver this Amendment and the
Registration Rights Agreement, to perform its obligations hereunder and
thereunder and to consummate the transactions contemplated by the Registration
Rights Agreement and the Stock Purchase Agreement, as amended hereby.  The
execution and delivery by Oxy of this Amendment and the Registration Rights
Agreement and the consummation by Oxy of the transactions contemplated by the
Registration Rights Agreement and the Stock Purchase Agreement, as amended
hereby, have been duly authorized by all necessary corporate action on the part
of Oxy.  This Amendment has been duly executed and delivered by Oxy and
constitutes the legally valid and binding obligation of Oxy, enforceable
against Oxy in accordance with its terms, except as enforceability is limited
by applicable bankruptcy, insolvency, reorganization, moratorium or similar
laws affecting creditors' rights generally and equitable principles (whether
applied in a court of law or equity). The Registration Rights Agreement, when
executed and delivered by Oxy, will constitute the legally valid and binding
obligation of Oxy, enforceable against Oxy in accordance with its terms, except
as enforceability is limited by applicable bankruptcy, insolvency,
reorganization, moratorium or similar laws affecting creditors' rights
generally and equitable principles (whether applied in a court of law or
equity).  Oxy is not obligated to give any notice to, to make any filing or
registration with, or to obtain any authorization, consent, approval or order
of, any Governmental Authority in order to consummate the transactions
contemplated by the Registration Rights Agreement or the Stock Purchase
Agreement, as amended hereby, other than (i) compliance with the applicable
requirements of the Hart-Scott-Rodino Act, (ii) as set forth on Schedule 3(a),
(iii) filings with Governmental Authorities in the Ordinary Course of Business
of Oxy or the Companies that are not required to be made prior to the
consummation of the transactions contemplated by the Stock Purchase Agreement,
as amended hereby, or (iv) such authorizations, consents, approvals or orders
that, if not obtained, and such notices, filings or registrations that, if not
made, would not, individually or in the aggregate, have (A) a Material Adverse
Effect with respect to the Companies, or (B) any adverse effect on the ability
of Oxy to perform this Amendment, the Registration Rights Agreement or the
Stock Purchase Agreement, as amended hereby.

         (b)     LEGAL COMPLIANCE; NONCONTRAVENTION.  No action, suit,
proceeding, hearing, investigation, charge, complaint, claim, demand or notice
seeking to restrain, prohibit or





                                      -20-
<PAGE>   71
obtain damages or other relief in connection with this Amendment or the
transactions contemplated by the Stock Purchase Agreement, as amended hereby,
has been filed or commenced against the Companies, and, to the Knowledge of
Oxy, no such action, suit, proceeding, hearing, investigation, charge,
complaint, claim, demand or notice has been threatened to be so filed or so
commenced.  The execution and delivery of this Amendment and the Registration
Rights Agreement by Oxy does not, and the performance of this Amendment and the
Registration Rights Agreement by Oxy will not, (i) conflict with, or violate,
the articles of incorporation or bylaws of Oxy, (ii) conflict with, or violate,
any Law in effect as of the date of this Amendment and applicable to Oxy or by
which any of the properties of Oxy are bound or affected, or (iii) result in
any breach of, or constitute a default (or an event that with notice or lapse
of time or both would become a default) under, or give to any Person (other
than Oxy or the Companies) any right of termination, amendment, acceleration or
cancellation of, or require payment under, or result in the creation of any
Lien on any of the Assets of any of the Companies pursuant to, any
International Contract to which any of the Companies is a party, except, in the
case of clauses (ii) and (iii) above, for such conflicts, violations, breaches,
defaults, events, rights of termination, amendment, acceleration or
cancellation, payment obligations or Liens that would not, individually or in
the aggregate, have a Material Adverse Effect with respect to the Companies.

         4.      REPRESENTATIONS AND WARRANTIES OF NABORS.  Nabors represents
and warrants to Oxy that:

         (a)     AUTHORIZATION OF TRANSACTION BY NABORS.  Nabors has all
requisite corporate power and authority to execute and to deliver this
Amendment and the Registration Rights Agreement, to perform its obligations
hereunder and thereunder and to consummate the transactions contemplated by the
Registration Rights Agreement and the Stock Purchase Agreement, as amended
hereby.  The execution and delivery by Nabors of this Amendment and the
Registration Rights Agreement and the consummation by Nabors of the
transactions contemplated by the Registration Rights Agreement and the Stock
Purchase Agreement, as amended hereby, have been duly authorized by all
necessary corporate action on the part of Nabors.  This Amendment has been duly
executed and delivered by Nabors and constitutes the legally valid and binding
obligation of Nabors, enforceable against Nabors in accordance with its terms,
except as enforceability is limited by applicable bankruptcy, insolvency,
reorganization, moratorium or similar laws affecting creditors' rights
generally and equitable principles (whether applied in a court of law or
equity).  The Registration Rights Agreement, when executed and delivered by
Nabors, will constitute the legally valid and binding obligation of Nabors,
enforceable against Nabors in accordance with its terms, except as
enforceability is limited by applicable bankruptcy, insolvency, reorganization,
moratorium or similar laws affecting creditors' rights generally and equitable
principles (whether applied in a court of law or equity).  Nabors is not
obligated to give any notice to, to make any filing or registration with, or to
obtain any authorization, consent, approval or order of, any Governmental
Authority or any other Person in connection with the execution, delivery or
performance by Nabors of this Amendment or the Registration Rights Agreement or
the consummation by Nabors of the transactions contemplated by the Registration
Rights Agreement or the Stock





                                      -21-
<PAGE>   72
Purchase Agreement, as amended hereby, other than (i) compliance with the
applicable requirements of the Hart-Scott- Rodino Act, (ii) as set forth on
Schedule 4(a), (iii) filings with federal or state securities commissions in
connection with the transactions contemplated by the Registration Rights
Agreement, (iv) filings with Governmental Authorities in the Ordinary Course of
Business of Nabors that are not required to be made prior to the consummation
of the transactions contemplated by the Stock Purchase Agreement, as amended
hereby, and (v) such authorizations, consents, approvals or orders that, if not
obtained, and such notices, filings or registrations that, if not made, would
not, individually or in the aggregate, have (A) a Material Adverse Effect with
respect to Nabors, or (B) any adverse effect on the ability of Nabors to
perform this Amendment, the Registration Rights Agreement or the Stock Purchase
Agreement, as amended hereby.


         (b)     LEGAL COMPLIANCE; NONCONTRAVENTION.  No action, suit,
proceeding, hearing, investigation, charge, complaint, claim, demand or notice
seeking to restrain, prohibit or obtain damages or other relief in connection
with this Amendment or the transactions contemplated by the Stock Purchase
Agreement, as amended hereby, has been filed or commenced against Nabors, and,
to the knowledge of Nabors, no such action, suit, proceeding, hearing,
investigation, charge, complaint, claim, demand or notice has been threatened
to be so filed or so commenced.  The execution and delivery of this Amendment
and the Registration Rights Agreement by Nabors does not, and the performance
of this Amendment and the Registration Rights Agreement by Nabors will not, (i)
conflict with, or violate, the certificate of incorporation or bylaws of
Nabors, (ii) conflict with, or violate, any Law in effect as of the date of
this Agreement and applicable to Nabors or by which any of the properties of
Nabors are bound or affected, or (iii) result in any breach of, or constitute a
default (or an event that with notice or lapse of time or both would become a
default) under, or give to any Person (other than Nabors) any right of
termination, amendment, acceleration or cancellation of, or require payment
under, or result in the creation of any Lien on any of the properties or assets
of Nabors pursuant to, any note, bond, mortgage, indenture, Contract, lease,
license, Permit, franchise or other instrument or obligation to which Nabors is
a party or by which any of the properties of Nabors are bound or affected,
except, in the case of clauses (ii) and (iii) above, for such breaches,
defaults, events, rights of termination, amendment, acceleration or
cancellation, payment obligations or Liens that would not, individually or in
the aggregate, have a Material Adverse Effect with respect to Nabors.

         (c)     NABORS SHARES; REGISTRATION RIGHTS AGREEMENT.  As of the
Closing and in the event that Nabors shall have exercised the Nabors Option,
the Nabors Shares will have been duly authorized for issuance pursuant to the
provisions of the Stock Purchase Agreement, as amended by this Amendment, and,
when issued and delivered by Nabors in accordance with such provisions, will be
duly authorized, validly issued, fully paid and nonassessable.  The Nabors
Shares are listed on the American Stock Exchange and on each additional
national securities exchange upon which similar securities issued by Nabors are
now listed.  The Registration Rights Agreement, when executed and delivered by
Nabors, will not be subject to, nor executed in violation of, any preemptive
rights.





                                      -22-
<PAGE>   73
         5.      MISCELLANEOUS.

         (a)     THIS AMENDMENT PART OF THE STOCK PURCHASE AGREEMENT.  This
Amendment amends the Stock Purchase Agreement pursuant to the provisions of
Sections 4(p) and 9(j) thereof.  The terms and provisions of this Amendment
shall be a part of the terms and provisions of the Stock Purchase Agreement for
any and all purposes, and all of the terms and provisions of both shall be read
together as though they constitute one instrument.  All references in the Stock
Purchase Agreement to "this Agreement" shall mean the Stock Purchase Agreement,
as amended by this Amendment.

         (b)     CONFIRMATION OF STOCK PURCHASE AGREEMENT.  Except as the Stock
Purchase Agreement and the terms and provisions thereof have been amended by
this Amendment, the Stock Purchase Agreement is in all respects ratified and
confirmed, and each and every term of the Stock Purchase Agreement shall remain
in full force and effect.

         (c)     NO THIRD-PARTY BENEFICIARIES.  NOTHING CONTAINED IN THIS
AMENDMENT, EXPRESS OR IMPLIED, IS INTENDED TO CONFER UPON ANY PERSON, OTHER
THAN THE PARTIES AND THEIR RESPECTIVE SUCCESSORS AND PERMITTED ASSIGNS, ANY
RIGHTS, REMEDIES OR OBLIGATIONS UNDER, OR BY REASON OF, THIS AMENDMENT.

         (d)     ENTIRE AGREEMENT.  This Amendment and the Stock Purchase
Agreement (including the documents referred to herein and therein) constitute
the entire agreement between the Parties and supersedes all prior
understandings and agreements with respect to the subject matter hereof or
thereof.

         (e)     ASSIGNMENT.  This Amendment shall be binding upon, and inure
to the benefit of, the Parties and their respective successors and permitted
assigns, but neither this Amendment nor any of the rights, interests or
obligations hereunder shall be assigned, by operation of law or otherwise, by
any Party without the prior written consent of the other Party; provided,
however, that Nabors may assign this Amendment or its rights hereunder to any
wholly owned subsidiary of Nabors to which Nabors shall have assigned, in
accordance with the provisions of Section 9(e) of the Stock Purchase Agreement,
the Stock Purchase Agreement or its rights thereunder, provided that (i), prior
to any such assignment, the Person to which such assignment shall be made shall
expressly assume by an instrument in writing, executed and delivered to Oxy,
the performance and observance of every obligation, covenant and agreement in
this Amendment on the part of Nabors to be performed or observed, and (ii) no
such assignment shall have the effect of releasing Nabors or any other Person
(including, without limitation, any additional party) from its obligations,
covenants or agreements under this Amendment.

         (f)     COUNTERPARTS.  This Amendment may be executed in one or more
counterparts, each of which when so executed shall be deemed an original, but
all of which together shall constitute one and the same instrument.





                                      -23-
<PAGE>   74
         (g)     NOTICES.  All notices and other communications hereunder to a
Party shall be in writing and shall be sent by as set forth in Section 9(g) of
the Stock Purchase Agreement.

         (h)     GOVERNING LAW.  This Amendment shall be governed by, and
construed in accordance with, the laws of the State of New York, without regard
to principles of conflicts of law.

         (i)     SERVICE OF PROCESS, CONSENT TO JURISDICTION, ETC.  Each Party
hereby irrevocably agrees that any legal action or proceeding against it
arising out of this Amendment may be brought in the courts of the State of New
York, or of the United States of America for the Southern District of New York,
and does hereby irrevocably (i) agree to designate, appoint and empower, prior
to the Closing Date, an agent to receive for and on behalf of it service of
process in the State of New York, and (ii) consent to service of process
outside the territorial jurisdiction of such courts in the manner permitted by
law.  In addition, each Party irrevocably waives (a) any objection which such
Party may now or hereafter have to the laying of venue of any suit, action or
proceeding arising out of, or relating to, this Amendment brought in any such
court, (b) any claim that any such suit, action or proceeding brought in any
such court has been brought in an inconvenient forum, and (iii) the right to
object, with respect to any such claim, suit, action or proceeding brought in
any such court, that such court does not have jurisdiction over such Party or
any other Party.  In addition, any such legal action or proceeding may be
brought in any court having jurisdiction pursuant to applicable law.

         (j)     AMENDMENTS AND WAIVERS.  No amendment of any provision of this
Amendment shall be valid unless the same shall be in writing and signed by each
Party hereto.  No waiver by either Party of any default, misrepresentation,
breach of warranty or covenant hereunder, whether intentional or not, shall be
deemed to extend to any prior or subsequent default, misrepresentation, breach
of warranty or covenant hereunder or affect in any way any rights arising by
virtue of any prior or subsequent such occurrence.

         (k)     HEADINGS.        The descriptive headings of the several
Sections of this Amendment are inserted for convenience only and do not
constitute a part of this Amendment.

         (l)     SEVERABILITY.  Any provision of this Amendment which is
prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction,
be ineffective to the extent of such prohibition or unenforceability without
invalidating the remaining provisions hereof or affecting the validity or
enforceability of such provision in any other jurisdiction.

         (m)     EXPENSES.  Except as otherwise provided herein, each of the
Parties will bear all of its own costs and expenses (including, without
limitation, legal and accounting fees and expenses) incurred in connection with
this Amendment and the transactions contemplated hereby.





                                      -24-
<PAGE>   75
         (n)     CONSTRUCTION.  The Parties have participated jointly in the
negotiation and drafting of this Amendment.  In the event any ambiguity or
question of intent or interpretation arises, this Amendment shall be construed
as if drafted jointly by the Parties, and no presumption or burden of proof
shall arise favoring or disfavoring either Party by virtue of the authorship of
any of the provisions of this Amendment.  Personal pronouns, when used in this
Amendment, whether in the masculine, feminine or neuter gender, shall include
all other genders, and the singular shall include the plural, and vice versa.
All references in this Amendment or in any Schedule attached hereto to (i)
Sections or subsections shall refer to the corresponding Section or subsection
of this Amendment, unless specific reference is made to a Section or subsection
of another document or instrument, and (ii) a Schedule or an Attachment shall
refer to the corresponding Schedule or Attachment to this Amendment, unless a
specific reference is made to a Schedule or an Attachment to another document
or instrument.  Any reference in this Amendment to any federal, state, local or
foreign statute or law shall be deemed also to refer to all rules and
regulations promulgated thereunder, unless the context requires otherwise.  The
word "including" shall mean including without limitation.

         (o)     INCORPORATION OF ATTACHMENT A AND SCHEDULES.  Attachment A
attached to, and the Schedules identified in, this Amendment are incorporated
herein by reference and made a part hereof.

         IN WITNESS WHEREOF, the parties hereto have executed this Amendment as
of the date first above written.



                                        NABORS INDUSTRIES, INC.
                                        
                                        
                                        By:       RICHARD A. STRATTON  
                                           -----------------------------------
                                           Name:  Richard A. Stratton
                                           Title: Vice Chairman
                                        
                                        
                                        
                                        OCCIDENTAL OIL AND GAS CORPORATION
                                        
                                        
                                        By:       JOHN W. ALDEN            
                                           -----------------------------------
                                           Name:  John W. Alden
                                           Title: Vice President and Secretary





                                      -25-

<PAGE>   1
                                                                   EXHIBIT 10.15

                            SHARE PURCHASE AGREEMENT

Agreement entered into as of this 18th day of October 1996, by and
between (1) Abbot Group plc a public company formed and existing under the laws
of England with registered number 623285 ("Abbot"), (2) Nabors Industries, Inc
a company formed and existing under the laws of the State of Delaware, USA (the
"Seller") and (3) KCA Drilling Group Limited, a company formed and existing
under the laws of England with registered number 1059871 ("the Buyer").  Abbot,
the Seller and the Buyer are referred to collectively herein as the "Parties".

The Seller owns all of the issued shares of Nabors Europe, Ltd., a company
formed and existing under the laws of England with registered number 1189464
(the "Company").

This Agreement contemplates a transaction in which the Buyer will purchase from
the Seller, and the Seller will sell to the Buyer, all of the issued shares of
the Company in return for cash and the issue of warrants to subscribe for
shares in Abbot upon and subject to the terms of this Agreement.

Now, therefore, in consideration of the premises and the mutual promises herein
made, and in consideration of the representations, warranties, and covenants
herein contained, the Parties agree as follows.

1.     DEFINITIONS

1.1    In this Agreement the following words and expressions shall unless the
       context otherwise expressly requires have the meanings set out opposite
       them:-

       "Abbot"                     has the meaning set forth in the preface
                                   above.
<PAGE>   2
       "Abbot Circular"            the circular to be issued to the
                                   shareholders of Abbot on the date of this
                                   Agreement in the approved terms.

       "the Abbot Group"           means Abbot and all its subsidiaries and
                                   subsidiary undertakings from time to time.

       "Accounts Date"             means 30 September 1995.

       "Act"                       means the Companies Act 1985.

       "Affiliate"                 means in relation to any body corporate, any
                                   subsidiary of such body corporate, any
                                   holding company of such body corporate and
                                   any subsidiary of any such holding company
                                   as such terms are defined in the Act.

       "Ancillary Documents"       means the documents to be executed pursuant
                                   to or in connection with this Agreement.

       "Applicable Rate"           means the National Westminster Bank plc base
                                   rate from time to time.

       "Britannia Bonus"           means any of the following sums which may
                                   become payable by the Independent Operator
                                   to NDESL or any Relevant Party pursuant to
                                   certain provisions of the Britannia
                                   Contract, namely:





                                       2
<PAGE>   3
                                   (i)     pursuant to Form 12 (Drilling
                                           Facilities Capex Target and Profit)
                                           of Exhibit 4C to the Britannia
                                           Contract ("the Drilling Facilities
                                           Profit"); and

                                   (ii)    pursuant to Form 12(a) of Exhibit 4C
                                           to the Britannia Contract ("the
                                           Topsides Alliance Incentive").

       "Britannia Bonus Account    means the monthly sum of Pound Sterling 
       Payment"                    6338 payable by the Independent Operator
                                   to NDESL or any Relevant Party pursuant to
                                   paragraph 1.0 of Form 12 (Drilling
                                   Facilities Capex Target & Profit) of Exhibit
                                   4C to the Britannia Contract.
        
       "Britannia Contract"        means contract BRT1-XA1 for detail design of
                                   drilling facilities and drilling operations
                                   and maintenance for the Britannia platform
                                   between NDESL and Chevron U.K. Limited dated
                                   1st November 1994.

       "Buyer"                     means KCA Drilling Group Limited a company
                                   formed and existing under the laws of
                                   England with registered number 1059871.

       "Business Day"              means any day other than a Saturday or a
                                   Sunday on which clearing





                                       3
<PAGE>   4
                                   banks in the City of London are open for
                                   business.

       "Cash Portion of the        means the aggregate of (i) L.20,000,000
       Purchase Price"             (ii) US$2,270,000, (iii) Pound Sterling 
                                   294,815 and (iv) the amount in Sterling
                                   equal to the Consolidated Working Capital to
                                   be calculated as provided in Section 2.6 and
                                   (v) an amount in the currency in which it
                                   was paid equal to the Permitted Expenditure.
        
       "Closing"                   has the meaning set forth in Section 2.3
                                   below.

       "Closing Date"              has the meaning set forth in Section 2.3
                                   below.

       "Company"                   has the meaning set forth in the preface
                                   above further details of which are set out
                                   in Part I of Schedule 1.

       "Company Shares"            means all of the issued shares of the
                                   Company and "Company Share" means any one of
                                   them.

       "Conditions"                means the conditions set out in Section 7.

       "Confidential Information"  means any information concerning the
                                   businesses and affairs of the Target Group
                                   that is not already generally available to
                                   the public otherwise than as the result of a
                                   breach of an obligation of





                                       4
<PAGE>   5
                                   confidentiality owed to the Target Group,
                                   including, without limitation, information
                                   concerning: the operation of any process;
                                   trade secrets; the manufacture, design or
                                   development of any products; the marketing
                                   of any products or services (including
                                   customer lists, financial information, sales
                                   statistics, survey reports and market share
                                   data); the selection and purchase of any
                                   component part or equipment existing in
                                   whatever form including but not limited to
                                   engineering and chemical data
                                   specifications, formulae, drawings, manuals,
                                   component lists, instructions, designs and
                                   circuit diagrams.

       "Consolidated Working       means the adjusted current net assets of the
       Capital"                    Target Group as at the Closing Date
                                   determined in accordance with the accounting
                                   principles and practices described in
                                   Schedule 2, plus an amount equal to the
                                   Redundancy Adjustment.

       "Consolidated Working       means the statement of Consolidated Working
       Capital Statement"          Capital to be prepared pursuant to Section
                                   2.6 and in accordance with the accounting
                                   principles and practices described in
                                   Schedule 2.





                                       5
<PAGE>   6
       "Contracts"                 means those contracts to which the Company
                                   or any of the Subsidiaries is a party which
                                   are listed in (and as amended by the
                                   amendments referred to in) Schedule 3.

       "Disclosure Letter"         means the disclosure letter delivered by the
                                   Seller to the Buyer on the date hereof in
                                   the approved terms.

       "Drill Pipe"                means the drill pipe details of which are
                                   attached as Schedule 10, Part 1.

       "Encumbrance"               means any encumbrance or security interest
                                   of any kind whatsoever including (without
                                   limitation) any mortgage, pledge, lien,
                                   charge, hypothecation, right to acquire,
                                   right of pre-emption, option, conversion
                                   right, third party right or interest, right
                                   of set off or counterclaim, trust
                                   arrangement or retention of title agreement
                                   or similar arrangement.





                                       6
<PAGE>   7
       "Estimated Cash Portion     means the aggregate of (i) Pound Sterling 
       of the Purchase Price"      20,000,000, (ii) US $2,270,000, (iii) Pound
                                   Sterling 294,815 and (iv) the amount in
                                   Sterling equal to the estimated amount of
                                   the Consolidated Working Capital to be
                                   calculated as provided in Sections 2.2.2 and
                                   2.6 and (v) an amount in the currency in
                                   which it was paid equal to the amount of any
                                   Permitted Expenditure.
        
       "Estimated Bonus"           means the amount which the Seller estimates
                                   as at the date of this Agreement will be
                                   payable by way of bonus pursuant to the
                                   Britannia Contract being Pound Sterling
                                   985,566 by way of Drilling Facilities Profit
                                   and Pound Sterling 601,537 by way of 
                                   Topsides Alliance Incentive.
        
       "Excluded Assets"           means (i) all of the residential property
                                   owned by the Company or its Subsidiaries,
                                   and (ii) all of the right, title and
                                   interest of the Company and its Subsidiaries
                                   to the assets owned or leased by the branch
                                   of NDESL operating in the United States,
                                   (iii) those tenders and bids and (iv) the
                                   99,900 shares of Pound Sterling 1 each in 
                                   Paloak Limited all as identified in Schedule
                                   5 together with all liabilities of the
                                   Company and its Subsidiaries associated with
                                   items (i) to (v).
        




                                       7
<PAGE>   8
       "Financial Statements"      means the audited balance sheets of the
                                   Company and each Subsidiary and the audited
                                   consolidated balance sheets of the Target
                                   Group as at, and the audited profit and loss
                                   accounts and cash flow statement of the
                                   Company and each Subsidiary and the audited
                                   consolidated profit and loss accounts of the
                                   Target Group for the financial periods ended
                                   on, 30 September 1994 and the Accounts Date
                                   together with the notes and directors'
                                   report and auditors' report and all other
                                   documents or statements annexed thereto or
                                   incorporated therein.

       "GAAP"                      means United Kingdom generally accepted
                                   accounting principles as in effect from time
                                   to time.

       "ICTA"                      means the Income and Corporation Taxes Act
                                   1988.

       "Independent Operator"      means Chevron U.K. Limited of 2 Portman
                                   Street, London W1H OAH or any assignee or
                                   successor thereto as party to the Britannia
                                   Contract.

       "Instrumentation"           means the instrumentation details of which
                                   are attached as Schedule 10, Part 2.





                                       8
<PAGE>   9
       "Intellectual Property"     means all the intellectual property in any
                                   part of the world used, or required to be
                                   used by the Company or any Subsidiary in, or
                                   in connection with, its business including
                                   but not limited to trade marks, service
                                   marks, patents, utility models, registered
                                   design rights, applications for any of the
                                   foregoing, unregistered trade marks and
                                   service marks, trade and business names
                                   including rights in any get-up or trade
                                   dress, copyright (including rights in
                                   computer software), unregistered design
                                   rights and inventions.

       "Knowledge"                 means the actual knowledge of Mr R.
                                   Stratton, Mr L. Heidt, Mr E. Nelson, Mr G.
                                   Allan, Mr J. Bruce and Mr E. McLeod and any
                                   other matters of which they ought reasonably
                                   in the due performance of their respective
                                   duties in relation to the Target Group to be
                                   aware.

       "Liability for Taxation"    has the meaning set forth in the Tax
                                   Covenant.

       "Licence"                   means a licence, permit, certificate,
                                   consent, approval, registration or
                                   authorisation.


       "London Stock Exchange"     means the London Stock Exchange Limited.





                                       9
<PAGE>   10
       "Most Recent Financial      means the unaudited balance sheet of the
       Statements"                 Company and each Subsidiary and the
                                   unaudited consolidated balance sheet of the
                                   Target Group as at, and the unaudited profit
                                   and loss account of the Company and each
                                   Subsidiary and the unaudited consolidated
                                   profit and loss account of the Target Group
                                   for, the financial period ended on the Most
                                   Recent Month End.

       "Most Recent Month End"     means 31 August 1996.

       "NDESL"                     means Nabors Drilling and Energy Services UK
                                   Limited registered in Scotland with company
                                   number 125584 further details of which are
                                   set out in Part 2 of Schedule 1.

       "Notional Tax Rate"         the statutory rate of corporation tax
                                   applicable to the tax period in which the
                                   Britannia Bonus or any part of it is
                                   included in taxable income of NDESL or any
                                   Relevant Party.

       "Ordinary Course of         means the ordinary course of business
       Business"                   consistent with past custom and practice.





                                       10
<PAGE>   11
       "Parties"                   has the meaning set forth in the preface
                                   above and "Party" shall mean either one of
                                   them.

       "Permitted Expenditure"     means any capital expenditure made in
                                   accordance with the terms of Section 5.1.

       "Person"                    includes an individual, a partnership, body
                                   corporate, a trust, a joint venture, an
                                   unincorporated association or a governmental
                                   entity (or any department, agency, or
                                   political subdivision thereof) and includes
                                   a reference to that person's legal personal
                                   representatives and successors.

       "Properties"                means the properties details of which are
                                   set out in Schedule 6 and references to a
                                   "Property" include a reference to each of
                                   the individual Properties.

       "Purchase Price"            has the meaning set forth in Section 2.2
                                   below.

       "Redundancy Adjustment"     means a cash sum up to a maximum of
                                   Pound Sterling 150,000 equal to the
                                   aggregate amount paid by the Company or any
                                   of the Subsidiaries in the period from 24
                                   May 1996 until the date of this Agreement in
                                   connection with the termination of
                                   employment of the individuals listed in Part
                                   2 of Schedule 4 by reason of
        




                                       11
<PAGE>   12
                                   redundancy (including any legal costs and
                                   expenses associated with any claims made in
                                   connection with such termination of
                                   employment).

       "Registered Intellectual    means any trade marks, service marks or
       Property"                   patents which have been registered at a
                                   public registry.

       "Relevant Party"            means any person to whom any of NDESL's
                                   rights and/or obligations under Britannia
                                   Contract are assigned or any successor of
                                   NDESL as party thereto.

       "Relevant Services"         means the services referred to in Section
                                   11.1.1(ii).

       "Resolutions"               means the shareholders' resolutions in the
                                   approved terms set out in the notice of
                                   extraordinary meeting attached to the Abbot
                                   Circular.

       "Retained Group"            means the Seller and any subsidiary or
                                   subsidiary undertaking of the Seller from
                                   time to time other than any member of the
                                   Target Group.

       "RTPA"                      means the Restrictive Trade Practices Act
                                   1976 and 1977.

       "Seller"                    has the meaning set forth in the preface
                                   above.





                                       12
<PAGE>   13
       "Subsidiary"                means either of NDESL and TWSL and
                                   "Subsidiaries" means both of them.

       "subsidiary and             have the meanings given to them respectively
       subsidiary undertaking"     by sections 736 and 258 of the Act.

       "Target Group"              means the Company and each of the
                                   Subsidiaries.

       "Taxation"                  has the meaning given in the Tax Covenant.

       "Taxation Authority"        has the meaning given in the Tax Covenant.

       "Tax Covenant"              means the tax covenant contained in Schedule
                                   7.

       "Tax Refund"                means any tax refund (including any interest
                                   or repayment supplement thereon) to the
                                   extent that such refund relates to the
                                   period before the Closing Date and for the
                                   avoidance of doubt including any tax refund
                                   received in connection with the litigation
                                   referred to in Section 6.2.

       "TCGA"                      means the Taxation of Chargeable Gains Act
                                   1992.





                                       13
<PAGE>   14
       "TWSL"                      means Thistle Well Services Limited
                                   registered in Scotland with company number
                                   139344 further details of which are set out
                                   in Part 3 of Schedule 1.

       "VAT"                       means, in the United Kingdom, value added
                                   tax.

       "VATA"                      means the Value Added Tax Act 1994.

       "Warrant"                   means the warrant to be issued by Abbot to
                                   the Seller as of the Closing Date in the
                                   approved terms.

       "Warranties"                means the representations, warranties and
                                   undertakings contained in Sections 3.1 and 4
                                   and references to a "Warranty" shall be
                                   construed accordingly.

1.2    A document expressed to be "in the approved terms" shall mean any
       document which has been signed or initialled for the purposes of
       identification by or on behalf of the Seller and the Buyer.

1.3    In this Agreement, unless the context otherwise requires, reference to:

       1.3.1  a Section or Schedule is a reference to a Section of or Schedule
              to this Agreement;

       1.3.2  a statutory provision includes a reference to that provision as
              modified, replaced, amended and/or re-enacted from time to time
              (whether before or after the date of this Agreement) and any
              prior or subsequent subordinate legislation made under it;





                                       14
<PAGE>   15
       1.3.3  "holding company" and "body corporate" have the respective
              meanings attributed to them in sections 736 and 740 of the Act;

       1.3.4  a "company" has the meaning set out in section 735 of the Act;
              and

       1.3.5  a "connected person" is a reference to a person connected with
              another within the meaning of section 839 of ICTA.

1.4    The Schedules form part of this Agreement and shall be interpreted or
       construed as though they were set out in this Agreement.

1.5    The headings to the Sections, Schedules and paragraphs of the Schedules
       are for convenience only and shall not affect the interpretation of this
       Agreement.

2.     PURCHASE AND SALE OF COMPANY SHARES.

2.1    BASIC TRANSACTION. The Seller agrees to sell to the Buyer and the Buyer
       agrees to purchase the Company Shares free from any Encumbrances with
       full title guarantee (provided however that for the purposes of
       interpreting the words "full title guarantee" the provisions of sections
       6(1) and 6(2) of the Law of Property (Miscellaneous Provisions) Act 1994
       ("LPA") shall be deemed not to apply and, other than with regard to
       subsequent transfers of the Company Shares by the Buyer or an Affiliate
       of the Buyer to another Affiliate of the Buyer, the provisions of
       section 7 of the LPA shall also be deemed not to apply.

2.2    PURCHASE PRICE. In consideration of the transfer to the Buyer of the
       Company Shares, (a) the Buyer agrees to pay to the Seller (i) twenty
       million pounds sterling (Pound Sterling 20,000,000), (ii) two million
       two hundred and seventy thousand U.S. Dollars (US$2,270,000), (iii)
       Pound Sterling 294,815 and (iv) the amount in Sterling equal to the
       Consolidated Working Capital as of the
        




                                       15
<PAGE>   16
       Closing Date and (v) an amount in the currency in which it was paid
       equal to the amount of any Permitted Expenditure and (b) Abbot agrees at
       the Closing Date to issue to the Seller the Warrant (together the
       "Purchase Price").  The Purchase Price shall be satisfied as follows:

       2.2.1  At Closing, the Buyer shall pay to the Seller the Estimated Cash
              Portion of the Purchase Price by telegraphic transfer of the
              Sterling component and the US Dollar component of the Estimated
              Cash Portion of the Purchase Price in immediately available funds
              into the following account of the Seller: account name Hong Kong
              Bank NY Foreign Exchange; account number 35206696; at Midland
              Bank plc, Swift code MIDL GB22, sort code 40-53-88;

       2.2.2  At least ten calendar days prior to Closing, the Seller shall
              prepare and deliver to the Buyer a statement setting forth (i) an
              estimate of the amount of the Consolidated Working Capital and
              the amount of any Permitted Expenditure, and (ii) a calculation
              of the Estimated Cash Portion of the Purchase Price based upon
              such estimate.  In the event that the Buyer does not agree with
              the Seller's computation, the Buyer shall promptly notify the
              Seller of the same, the Seller shall promptly provide such
              additional information as the Buyer shall reasonably request to
              support such computation, and the Parties shall negotiate in good
              faith and attempt to agree, at least three Business Days prior to
              the Closing Date, upon an acceptable estimate of such amounts.
              Failing any such mutual agreement, the Estimated Cash Portion of
              the Purchase Price delivered at Closing shall be Pound Sterling 
              23,295,000 plus US$2,270,000.

       2.2.3  At Closing, Abbot will issue the Warrant.  Abbot undertakes that
              there shall be no issuance of any equity securities,
              subdivisions, consolidations, exchange of shares, rights issues,





                                       16
<PAGE>   17
              reductions of capital or the like of the issued share capital of
              Abbot after the date of this Agreement and on or before the
              Closing Date save for the placing and open offer described in the
              Abbot Circular.

       2.2.4  All stamp duty payable on the purchase of the Company Shares
              shall be borne by the Buyer.

2.3    THE CLOSING.  The closing of the transactions contemplated by this
       Agreement ("CLOSING") shall take place at the offices of Pinsent Curtis,
       69 Old Broad Street, London EC2, England 3 Business Days after the
       Conditions have been satisfied or waived (in accordance with Section 7)
       or such other date as the Parties may mutually determine (the "CLOSING
       DATE").

2.4    DELIVERIES AT THE CLOSING.  At Closing:

       2.4.1  the Seller will deliver to the Buyer:

              2.4.1.1   duly executed transfers of all of the Company Shares in
                        favour of the Buyer together with the relative share
                        certificates;

              2.4.1.2   duly executed transfers in favour of the Company of
                        such shares in the Subsidiaries as are registered in
                        the names of nominee holders, together with the
                        relative share certificates;

              2.4.1.3   a copy, certified to be a true copy by a director or
                        secretary of the Seller, of a resolution of the
                        Seller's board of directors (or an authorised committee
                        of that board) authorising the execution and completion
                        of this





                                       17
<PAGE>   18
                        Agreement and the execution of the Ancillary Documents
                        to which it is a party;

              2.4.1.4   duly executed power(s) of attorney in favour of the
                        Buyer, or the Company in relation to the Subsidiaries,
                        in the approved terms to enable the Buyer and the
                        Company pending registration as the holder of the
                        Company Shares or the shares in the Subsidiaries (as
                        the case may be) to exercise all voting and other
                        rights attaching to the Company Shares and the shares
                        in the Subsidiaries;

              2.4.1.5   the title deeds and documents relating to each of the
                        Properties as listed on Schedule 6 (which obligation
                        shall be deemed satisfied by making them available at
                        the offices of Paull & Williamsons at 6 Union Row,
                        Aberdeen, Aberdeenshire AB1 1SA);

              2.4.1.6   a document from Hancock Mutual Life Insurance Company
                        (and any Affiliates) ("Hancock") evidencing the release
                        and discharge of all charges over the shares and assets
                        of the Target Group and all guarantees given to Hancock
                        by the Target Group together with the appropriate form
                        under the Act evidencing the release and discharge of a
                        charge dated 26 August 1992 in favour of the Royal Bank
                        of Scotland plc over the assets of TWSL;

              2.4.1.7   a deed of acknowledgement from the Seller in the
                        approved terms that all inter-group indebtedness
                        between the Retained Group on the one hand and the
                        Target Group on the other has been discharged in full;





                                       18
<PAGE>   19
              2.4.1.8   a legal opinion from Baker & McKenzie, New York in
                        substantially the approved terms relating to the
                        Seller;

              2.4.1.9   the resignation of Coopers & Lybrand as the auditors of
                        each member of the Target Group, such resignation to
                        contain a statement in accordance with Section 394 of
                        the Act that there are no circumstances connected with
                        their ceasing to hold office which they consider should
                        be brought to the attention of the members or creditors
                        of the relevant member of the Target Group;

              2.4.1.10  all the statutory books (duly written up to date) of
                        the Company and the Subsidiaries and their respective
                        certificates of incorporation and on change of name (if
                        any) and common seals;

              2.4.1.11  letters of resignation in the approved terms from each
                        of the directors and the secretary of the Company and
                        the directors and secretary of each of the
                        Subsidiaries, such resignations to take effect from
                        close of the meeting of the board of directors of the
                        Company referred to in Section 2.4.4 and letters of
                        resignation in the approved terms from those of the
                        Excluded Employees who have accepted employment with
                        the Retained Group;

              2.4.1.12  the latest inspection reports in respect of the Drill
                        Pipe;

              2.4.1.13  the Buyer will deliver to the Seller the Estimated Cash
                        Portion of the Purchase Price in accordance with the
                        payment instructions specified in Section 2.2.1;





                                       19
<PAGE>   20
              2.4.1.14  the Buyer will deliver to the Seller a legal opinion
                        from a reputable firm of lawyers admitted in the
                        practice of the Isle of Man in substantially the
                        approved terms.

       2.4.2  Abbot will issue to the Seller the Warrant;

       2.4.3  the Seller shall cause the directors of the Company to hold a
              meeting of the board of directors of the Company at which they
              shall pass resolutions in the approved terms (inter alia) to:-

              2.4.3.1   approve the registration of the Buyer as a member of
                        the Company subject only to the production of duly
                        stamped transfers in respect of the Company Shares;

              2.4.3.2   accept the resignations referred to in Section 2.4.1.11
                        and appoint such persons as the Buyer may nominate as
                        directors and secretary of the Company;

              2.4.3.3   revoke all authorities to the bankers of the Company
                        relating to bank accounts and give authority to such
                        persons as the Buyer may nominate to operate the same.

       2.4.4  the Seller shall procure that a board meeting of each of the
              Subsidiaries is held at which the directors:

              2.4.4.1   approve the registration of the Company as a member of
                        its Subsidiaries in respect of, and subject only to the
                        production of duly stamped transfers of, the shares
                        referred to in Section 2.4.1.2;





                                       20
<PAGE>   21
              2.4.4.2   accept the resignations referred to in Section 2.4.1.12
                        in respect of the relevant Subsidiary and appoint the
                        persons nominated by the Buyer as directors and
                        secretary of the Subsidiary;

              2.4.4.3   revoke all existing authorities to bankers relating to
                        the operation of the Subsidiary's bank accounts and
                        give authority in favour of the person nominated by the
                        Buyer to operate such account.

2.5    If Closing does not proceed on the date set for Closing in Section 2.3
       (or on the date to which Closing is postponed pursuant to Section 2.5.2)
       because any Party fails to discharge fully any of its obligations under
       this Section 2 or under Sections 5.5 to 5.8, the Buyer in the case of
       failure by the Seller or the Seller in the case of failure by the Buyer
       or Abbot may, without prejudice to any other remedies available except
       as such remedies are limited in Section 5.4, by notice to the other
       elect to:

       2.5.1  proceed to Closing so far as practicable; or

       2.5.2  postpone Closing to such date as the non-defaulting Party
              specifies being not later than 21 November 1996 in which event
              the provisions of this Agreement apply as if that other date is
              the date set for Closing in Section 2.3; or

       2.5.3  terminate this Agreement in which event the provisions of Section
              9.2 shall apply.





                                       21
<PAGE>   22
2.6    POST-CLOSING ADJUSTMENT.

       2.6.1  On or before the date that is 125 calendar days following the
              Closing Date (or the next Business Day if such date is not a
              Business Day), the Buyer will prepare and deliver to the Seller a
              statement ("the Consolidated Working Capital Statement") showing
              the actual amount of the Consolidated Working Capital together
              with the amount of any Permitted Expenditure.  The Seller shall
              use all reasonable endeavours to procure that Coopers & Lybrand
              shall grant to the Buyer access to their working papers for the
              Seller and for the Retained Group to the extent reasonably
              required to enable the Buyer to prepare the Consolidated Working
              Capital Statement and the Seller shall promptly make available to
              the Buyer all information which is in the possession of the
              Retained Group which may reasonably be required to prepare the
              Consolidated Working Capital Statement.

       2.6.2  The Buyer shall make available to the Seller all information
              which shall be in the possession of the Buyer or any member of
              the Target Group and shall use all reasonable endeavours to
              procure that the accountants acting on behalf of the Buyer in
              connection with the preparation of the Working Capital Statement
              shall grant to the Seller access to their working papers in
              respect of the Working Capital Statement to the extent reasonably
              required by the Seller for the Seller to verify whether the
              Consolidated Working Capital Statement is correct.  Within 30
              calendar days following delivery of the Consolidated Working
              Capital Statement to the Seller, the Seller shall notify the
              Buyer whether it agrees with the Consolidated Working Capital
              Statement.  If the Seller disagrees with the Consolidated Working
              Capital Statement, the Seller shall provide the Buyer with a
              written notice specifying the basis for the Seller's





                                       22
<PAGE>   23
              disagreement, and the Seller and the Buyer shall work in good
              faith to reach agreement on the amount of the Consolidated
              Working Capital.  In the absence of a written notice from the
              Seller to the Buyer, specifying the basis for the Seller's
              disagreement, the Seller shall be deemed to have agreed the
              amount of the Consolidated Working Capital contained in the
              Consolidated Working Capital Statement delivered to it pursuant
              to Section 2.6.1.

       2.6.3  If the Buyer and the Seller fail to reach agreement on the amount
              of the Consolidated Working Capital within 30 calendar days
              following the date of written notice given in accordance with
              clause 2.6.2, either the Seller or the Buyer may cause the matter
              to be referred to one of the "Big Six" independent public
              accounting firms as the Seller and the Buyer may mutually agree.
              In default of agreement within 3 Business Days of one party
              nominating a firm, any Party shall be entitled to request the
              President of the Institute of Chartered Accountants in England
              and Wales to select such independent accounting firm (other than
              Coopers & Lybrand and Arthur Andersen).  The fees and
              disbursements of such accountants shall be borne equally by the
              Buyer and the Seller.  Such accountants shall examine the records
              of the Seller, the Target Group and the Buyer, and, no later than
              90 calendar days following the date upon which such matter shall
              be referred to such accountants, such accountants shall determine
              the amount of the Consolidated Working Capital and the amount of
              any Permitted Expenditure.  Any such determination (i) shall
              (except as to any manifest error) be final and binding on the
              Parties, and (ii) may be enforced by appropriate judicial or
              other proceedings.





                                       23
<PAGE>   24
       2.6.4  The Cash Portion of the Purchase Price shall reflect any such
              determination by such accountants.  If the Cash Portion of the
              Purchase Price (whether by agreement of the Parties or after
              giving effect to any such determination by such accountants)
              exceeds the Estimated Cash Portion of the Purchase Price paid at
              the Closing, the Buyer shall pay to the Seller the amount of such
              excess plus interest thereon from the Closing Date until paid at
              the Applicable Rate.  If the Cash Portion of the Purchase Price
              (whether by agreement of the Parties or after giving effect to
              any such determination by such accountants) is less than the
              Estimated Cash Portion of the Purchase Price paid at the Closing,
              the Seller shall pay to the Buyer the amount of such shortfall
              plus interest thereon from the Closing Date until paid at the
              Applicable Rate.  Such payment shall be made, in either case,
              within 15 calendar days following the agreement of the Parties or
              the final determination of the Cash Portion of the Purchase Price
              by such accountants.  All of such interest shall be computed on
              the basis of the actual number of days elapsed in a year of 365
              or 366 days, as the case may be.

3.     REPRESENTATIONS AND WARRANTIES CONCERNING THE TRANSACTION.

3.1    REPRESENTATIONS AND WARRANTIES OF THE SELLER. The Seller represents and
       warrants to the Buyer that the statements contained in this Section 3.1
       are  true and   accurate as of the date of this Agreement except as
       fairly set forth in  the Disclosure Letter.

       3.1.1  ORGANIZATION OF SELLER. The Seller is duly organized and validly
              existing under the laws of the jurisdiction of its incorporation.

       3.1.2  AUTHORISATION OF TRANSACTION. The Seller has full power and
              authority to execute and deliver this Agreement and each of the
              Ancillary Documents to which it is a party and to perform its





                                       24
<PAGE>   25
              obligations thereunder.  This Agreement and each of the Ancillary
              Documents to which it is a party constitute the valid and legally
              binding obligation of the Seller, enforceable in accordance with
              their respective terms and conditions.  The Seller need not give
              any notice to, make any filing with, or obtain any authorisation,
              consent, or approval of any government or governmental agency in
              order to consummate the transactions contemplated by this
              Agreement.

       3.1.3  NONCONTRAVENTION.  Neither the execution and the delivery of  the
              Agreement or the Ancillary Documents to which it is a party, nor
              the consummation of the transactions contemplated thereby, will
              (i) violate any constitution, statute, regulation, rule,
              injunction, judgment, order, decree, ruling, charge, or other
              restriction of any government, governmental agency, or court to
              which the Seller is subject or (ii) violate any provision of
              Seller's charter or bylaws or (iii) conflict with, result in a
              breach of, constitute a default under, result in the acceleration
              of, create in any party the right to accelerate, terminate,
              modify, or cancel, or require any notice under any agreement,
              contract, lease, license, instrument, or other arrangement to
              which the Seller is a party or by which it is bound or to which
              any of its assets is subject.

       3.1.4  BROKERS' FEES. The Seller has no liability or obligation to pay
              any fees or commissions to any broker, finder, or agent with
              respect to the transactions contemplated by this Agreement for
              which the Buyer could become liable or obligated.

3.2    REPRESENTATIONS AND WARRANTIES OF THE BUYER. The Buyer represents and
       warrants to the Seller that the statements contained in this Section 3.2
       are true and  accurate as of the date of this Agreement.





                                       25
<PAGE>   26
       3.2.1  ORGANIZATION OF THE BUYER.  The Buyer is a corporation duly
              incorporated under English law.

       3.2.2  AUTHORISATION OF TRANSACTION.  The Buyer has full power and
              authority to execute and deliver this Agreement and each of the
              Ancillary Documents to which it is a party and to perform its
              obligations thereunder.  This Agreement and each of the Ancillary
              Documents to which it is a party constitutes the valid and
              legally binding obligation of the Buyer, enforceable in
              accordance with its terms and conditions. The Buyer need not give
              any notice to, make any filing with, or obtain any authorisation,
              consent, or approval of any government or governmental agency in
              order to consummate the transactions contemplated by this
              Agreement.

       3.2.3  NONCONTRAVENTION.  Neither the execution and the delivery of this
              Agreement or the Ancillary Documents to which it is a party, nor
              the consummation of the transactions contemplated hereby, will
              (i) violate any constitution, statute, regulation, rule,
              injunction, judgment, order, decree, ruling, charge, or other
              restriction of any government, governmental agency, or court to
              which the Buyer is subject or (ii) violate any provision of its
              Memorandum or Articles of Association or (iii) conflict with,
              result in a breach of, constitute a default under, result in the
              acceleration of, create in any party the right to accelerate,
              terminate, modify, or cancel, or require any notice under any
              agreement, contract, lease, license, instrument, or other
              arrangement to which the Buyer is a party or by which it is bound
              or to which any of its assets is subject.

       3.2.4  BROKERS' FEES.  The Buyer has no liability or obligation to pay
              any fees or commissions to any broker, finder, or agent with





                                       26
<PAGE>   27
              respect to the transactions contemplated by this Agreement for
              which the Seller could become liable or obligated.

3.3    REPRESENTATIONS AND WARRANTIES OF ABBOT.  Abbot represents and warrants
       to the Seller that the statements contained in this Section 3.3 are true
       and accurate as of the date of this Agreement.

       3.3.1  ORGANIZATION OF ABBOT.  Abbot is a corporation duly incorporated
              under English law.

       3.3.2  AUTHORISATION OF TRANSACTION.  Abbot has full power and authority
              to execute and deliver this Agreement and to perform its
              obligations hereunder and, without limitation, to issue the
              Warrant to the Seller on the Closing Date and to comply with its
              obligations thereunder. This Agreement and each of the Ancillary
              Documents to which it is a party constitutes the valid and
              legally binding obligation of Abbot, enforceable in accordance
              with its terms and conditions. Abbot need not give any notice to,
              make any filing with, or obtain any authorisation, consent, or
              approval of any other person in order to consummate the
              transactions contemplated by this Agreement.

       3.3.3  NONCONTRAVENTION.  Neither the execution and the delivery of this
              Agreement or the Ancillary Documents to which it is a party, nor
              the consummation of the transactions contemplated hereby, will
              (i) violate any constitution, statute, regulation, rule,
              injunction, judgment, order, decree, ruling, charge, or other
              restriction of any government, governmental agency, or court to
              which Abbot is subject or (ii) violate any provision of its
              Memorandum or Articles of Association or (iii) conflict with,
              result in a breach of, constitute a default under, result in the
              acceleration of, create in any party the right to accelerate,
              terminate, modify, or cancel, or require any notice under any





                                       27
<PAGE>   28
              agreement, contract, lease, license, instrument, or other
              arrangement to which Abbot is a party or by which it is bound or
              to which any of its assets is subject.

       3.3.4  BROKERS' FEES.  Abbot has no liability or obligation to pay any
              fees or commissions to any broker, finder, or agent with respect
              to the transactions contemplated by this Agreement for which the
              Seller could become liable or obligated.

       3.3.5  CAPITALIZATION. The authorised share capital of Abbot is
              Pound Sterling 31,500,000 comprising 185,000,000 ordinary shares
              of 15 pence each and 3,750,000 convertible preference shares of
              Pound Sterling 1 each of which 108,064,471 ordinary shares and
              3,750,000 convertible preference shares are issued and are fully
              paid.  Upon the successful completion of the placing and open
              offer referred to in the Abbot Circular, Abbot's authorised share
              capital will be Pound Sterling 31,500,000, comprising 185,000,000
              ordinary shares of 15 pence each and 3,750,000 convertible
              preference shares of Pound Sterling 1 each of which 130,277,365
              ordinary shares and 3,750,000 convertible preference shares will
              be issued and fully paid.
        
3.4    The representations and warranties contained in Sections 3.2.2, 3.2.3,
       3.3.2 and 3.3.3 insofar as they relate to the performance of the
       obligations of Abbot and the Buyer in Sections 2.2, 2.4.2 and 2.4.3 are
       given subject to the satisfaction of the Conditions in Section 7.1.1 and
       7.1.2.





                                       28
<PAGE>   29
4.     REPRESENTATIONS AND WARRANTIES CONCERNING THE COMPANY AND ITS
       SUBSIDIARIES.

4.1    The Seller represents and warrants to the Buyer that the statements
       contained in  Schedule 8 are true and accurate as of the date of this
       Agreement and except as fairly set forth in the Disclosure Letter, or as
       set forth in this Agreement or any Schedule to this Agreement.

4.2    Save as provided in the Disclosure Letter and save for any information
       within the actual knowledge of any executive member of the Board of
       Directors of Abbot (which information shall be deemed to be known to the
       Buyer), no information of which Abbot or the Buyer has knowledge shall
       prejudice any claim being made by the Buyer under any of the Warranties,
       nor shall it affect the amount recoverable under any such claim and,
       subject thereto, neither the rights and remedies of the Buyer, nor the
       Seller's liability in respect of the Warranties shall be affected by any
       investigation made by or on behalf of the Buyer into the Target Group.

4.3    Each of the Warranties shall be interpreted as a separate and
       independent Warranty and shall not be deemed to be limited by reference
       to any other Warranty.

4.4    No information supplied by, or on behalf of, the Company or its
       Subsidiaries to the Seller or its advisers in connection with the
       business and affairs of the Target Group constitutes a representation,
       warranty or undertaking to the Seller as to its accuracy by the Company
       or its Subsidiaries and the Seller waives each and every claim which it
       may have against the Company, its Subsidiaries or their respective
       employees in respect of such information.





                                       29
<PAGE>   30
5.     PRE-CLOSING COVENANTS.

The Parties agree as follows with respect to the period between the execution
of this Agreement and the Closing.

5.1    OPERATION OF BUSINESS.  The Seller shall procure that the Company and
       its Subsidiaries shall, save to the extent required or permitted by this
       Agreement or to enable the Seller to perform its obligations under this
       Agreement including its obligations to procure the transfer of the
       Excluded Assets, the Drill Pipe and the Instrumentation and the
       discharge of all bank indebtedness and intercompany accounts pursuant to
       Sections 5.5 to 5.8, conduct its business only in the Ordinary Course of
       Business so as to maintain it as a going concern and shall not without
       the prior written consent of the Buyer;

       5.1.1  create, allot, issue, repay, redeem or grant any options over any
              share or loan capital of the Company or its Subsidiaries or agree
              to do any of those things;

       5.1.2  acquire or dispose of or agree to acquire or dispose of any share
              or other interest in any company, partnership or other venture;

       5.1.3  acquire or dispose of or agree to acquire or dispose of any
              individual fixed asset with a book value in excess of Pound
              Sterling 5,000 nor fixed assets with an aggregate book value 
              in excess of Pound Sterling 100,000;

       5.1.4  declare, make or pay any dividend or other distribution;

       5.1.5  pass a shareholders' resolution;





                                       30
<PAGE>   31
       5.1.6  create, or agree to create, an Encumbrance over any asset or
              redeem, or agree to redeem, an existing Encumbrance over any
              asset;

       5.1.7  acquire or dispose of any freehold or leasehold property or grant
              or terminate any lease or third party right (including Licences)
              in respect of any of the Properties nor agree to do any of those
              things or change the existing use of the Properties or change or
              agree to change the terms of any lease or third party rights in
              respect of the Properties or the rents or fees payable
              thereunder;

       5.1.8  make or agree to make any amendment to any of the Contracts which
              amendment has the effect of increasing costs to the Target Group
              or decreasing revenues to the Target Group in an aggregate value
              on an annualised basis in excess of Pound Sterling 50,000, or 
              terminate any of the Contracts;

       5.1.9  amend the terms of employment of any employee of the Target Group
              (including as to pension commitments and share options) or offer
              to engage any new employee or consultant at an annual salary or
              fee (on the basis of full time engagement) in excess of Pound 
              Sterling 25,000 or dismiss any Employee save for the hiring or
              dismissal of offshore employees where such action is reasonably
              required to enable the Target Group to comply with its
              obligations under any Contract or other drilling contract (if
              any);
        
       5.1.10 compromise, settle, release, discharge or compound any litigation
              or arbitration proceedings except where the costs of such
              litigation or arbitration proceedings are to be borne by the
              Seller pursuant to the terms of Section 6.2 of this Agreement in





                                       31
<PAGE>   32
              which case the Seller shall have absolute discretion in the
              handling of such proceedings;

       5.1.11 enter into any new contracts for the provision of labour services
              for drilling platforms or enter into any other contracts for the
              supply of goods or services with an annual revenue or cost in
              excess of Pound Sterling 50,000;

       provided that (i) where any capital expenditure is made by the Target
       Group which is not in breach of this Section 5.1 after the date of this
       Agreement and prior to Closing such sum shall be added to the Purchase
       Price as Permitted Expenditure payable by the Buyer, and (ii) this
       Section 5.1 shall not prevent the Seller making any ex-gratia payment
       to, or granting or permitting to be exercised any option over shares
       (other than shares in any company in the Target Group) by, any employee
       of the Target Group or from offering employment with the Retained Group
       to the employees listed in Schedule 4, Part 1.

5.2    OWNERSHIP OF SHARES.  In the period prior to Closing, the Seller will
       retain the entire legal and beneficial ownership of the Company Shares
       and of the entire issued share capital of the Subsidiaries (subject to
       legal title held by nominee shareholders as set out in Parts 2 and 3 of
       Schedule 1).

5.3    NOTIFICATION.  The Seller undertakes prior to Closing to notify
       immediately the Buyer in writing if it becomes aware that any of the
       circumstances set out in paragraphs (i), (ii) or (iv) of Section 5.4
       have arisen or will arise.

       5.3.1  REMEDIES FOR BREACH.  Notwithstanding any breach by the Seller of
              a provision of this Agreement including any breach of the
              Warranties, the Buyer shall proceed to Closing and shall not be
              entitled in any circumstances to rescind or terminate this
              Agreement, save in the case





                                       32
<PAGE>   33
              of (i) fraud by the Seller or (ii) the Seller not having
              disclosed to the Buyer prior to the date of this Agreement the
              fact that it had given or received notice of termination of any
              Contract or that any Contract had been terminated or (iii) the
              Seller not having complied with its obligations under Sections
              2.4.1, 2.4.4 and 2.4.5 or under Sections 5.5 to 5.8 at or prior
              to Closing or (iv) the Seller failing to deliver the Company
              Shares at Closing in accordance with the provisions of Section
              2.1 or failing to deliver the shares of the Subsidiaries in
              accordance with paragraph 5.1 of Schedule 8.

       5.3.2  If the Buyer decides to proceed to Closing and not to exercise
              its right of rescission this shall be without prejudice to any
              rights the Buyer may have to claim damages for breach of contract
              or to exercise any other right or remedy, whether under this
              Agreement or otherwise, resulting from a breach of this Agreement
              or the Warranties, but subject in each case to all other
              limitations on the Seller's liability contained in this
              Agreement.  The Buyer shall in no circumstances be entitled to
              rescind this Agreement after Closing.

5.4    BORROWED FUNDS.  Seller shall procure that, as of the Closing Date, no
       member of the Target Group shall have any indebtedness to any bank or
       other financial institution.

5.5    EXCLUDED ASSETS.  To the extent that such assignments or transfer have
       not occurred prior to the date hereof the Seller shall prior to Closing
       cause each member of the Target Group to assign or transfer to a member
       of the Retained Group all Excluded Assets (whether paid in cash or left
       outstanding as an intercompany debt, but subject always to compliance
       with Section 5.5) and any such assignment or transfer shall be permitted
       without the consent of the Buyer, provided however, that:-

       5.5.1  if any such assignment or transfer shall be prohibited without
              the consent of a third party and such consent shall not have





                                       33
<PAGE>   34
              been obtained prior to the Closing, then (i) such assignment or
              transfer shall not be completed prior to the Closing, (ii), from
              and after the Closing, the Buyer and the Seller will use all
              reasonable commercial efforts to obtain such third-party consent,
              (iii), if the Buyer obtains such third-party consent, the Buyer
              will cause the company which owns such Excluded Asset to transfer
              such Excluded Asset to the Seller or its designee for the
              consideration attributed to it in Schedule 5, pursuant to a deed
              or other assignment document reasonably acceptable to the Seller
              and the Buyer.  The Seller shall indemnify and keep indemnified
              the Buyer and its Affiliates from and against any claims,
              proceedings, costs and liability (other than any liability
              arising out of any action of the Buyer, any of its Affiliates or
              any member of the Target Group from and after the Closing)
              arising out of (A) the ownership of such Excluded Asset, and (B)
              any such transfer; and

       5.5.2  the Seller shall not be obliged to cause NDESL to transfer the
              99,900 shares of L.1,00 each in Paloak Limited, but shall be
              entitled to do so if it so desires.

5.6    ACCOUNTS WITH AFFILIATES.  Prior to Closing, the Seller shall procure
       that, as of the Closing Date, all intercompany loan accounts or
       indebtedness including any trading accounts between (i) the Retained
       Group and (ii) the Target Group are discharged in full.

5.7    DRILL PIPE AND INSTRUMENTATION.  The Seller shall procure that prior to
       Closing the Drill Pipe and the Instrumentation shall be transferred to
       NDESL free from any Encumbrance and with full title guarantee, but with
       the provisions of Sections 6(1) and 6(2) of the LPA disapplied and,
       other than with regard to subsequent transfers between NDESL and an
       Affiliate or between Affiliates of NDESL, with the provisions of Section
       7 of the LPA disapplied (subject, in the case of the Instrumentation, to
       a





                                       34
<PAGE>   35
       contract right in favour of Elf Caledonia Limited) for an aggregate cash
       price payable by NDESL (excluding any VAT, if applicable) of two million
       two hundred and seventy thousand US dollars (US$2,270,000) and two
       hundred and ninety-four thousand eight hundred and fifteen pounds
       (Pound Sterling 294,815).  The Seller shall also procure the assignment 
       to NDESL (to the extent such rights are capable of assignment) of all 
       such manufacturer's rights, warranties and guarantees as may be 
       available to the transferor in connection with the Instrumentation.

5.8    CHANGE OF CORPORATE NAMES.  The Buyer acknowledges that the Seller may
       cause the Company and the Subsidiaries at or prior to Closing to effect
       changes to their respective names to remove therefrom the name "Nabors".
       Abbot undertakes that no member of the Abbot Group shall at any time use
       such name or the names "Sundowner" or "Canrig" or any substantially or
       confusingly similar name, or any trademark, logo or symbol that includes
       or is otherwise associated with any such name, for any purpose,
       including without limitation in connection with the marketing of any
       products or services by the Target Group; and insofar as changes to such
       names have not been effected at or prior to Closing, the Buyer shall
       procure that all necessary steps are taken to complete such changes of
       names within 5 Business Days from Closing.  Notwithstanding the
       foregoing, the Buyer may, for a period not exceeding 90 days immediately
       following Closing, use machinery and equipment that has affixed thereto
       the name "Nabors" provided, however, that (i) the Buyer shall use all
       reasonable endeavours to erase, cover or remove such name as soon as
       possible after Closing and (ii) the Buyer shall indemnify and hold
       harmless the Seller and any member of the Retained Group from and
       against any loss, liability, damage or claim that the Seller or any
       member of the Retained Group may suffer as a result of such use by the
       Buyer of such names, trademarks, logos or symbols.





                                       35
<PAGE>   36
5.9    FULL ACCESS. The Seller will permit, and the Seller will cause each of
       the Company and its Subsidiaries to permit, representatives of the Buyer
       to have access at all reasonable times subject to reasonable notice, and
       in a manner so as not to interfere unnecessarily with the normal
       business operations of the Company and its Subsidiaries, to all
       premises, properties, personnel, books, records (including tax records),
       contracts, and documents of or pertaining to each of the Company and its
       Subsidiaries other than to the Excluded Assets.  The Buyer will treat as
       confidential and hold as such any Confidential Information it receives
       from the Seller, the Company, and its Subsidiaries in the course of the
       reviews contemplated by this Section 5.10, will not at any time
       hereafter use any of the Confidential Information or disclose or divulge
       any such Confidential Information except in connection with this
       Agreement or to meet the requirements of the London Stock Exchange or
       other governmental or regulatory authorities, and, if this Agreement is
       terminated for any reason whatsoever, will return to the Seller, the
       Company, and its Subsidiaries all tangible embodiments (and all copies)
       of the Confidential Information which are in its possession.

6.     POST-CLOSING COVENANTS.

The Parties agree as follows with respect to the period following the Closing.

6.1    GENERAL. In case at any time after the Closing any further action is
       necessary to carry out the purposes of this Agreement, each of the
       Parties will take such further action (including the execution and
       delivery of such further instruments and documents) as the other Party
       reasonably may request, all at the sole cost and expense of the
       requesting Party.

6.2    TAX LITIGATION. For the avoidance of doubt and, notwithstanding any of
       the terms of the agreement between Loffland Brothers North Sea, Inc.





                                       36
<PAGE>   37
       and NDESL dated 21 September 1990 providing for the transfer of the
       business and assets of Loffland Brothers North Sea, Inc. to NDESL,
       nothing in this Agreement shall limit or restrict the rights of the
       Seller or Loffland Brothers North Sea, Inc. to conduct, compromise,
       settle or resist the High Court litigation (number CH 1996 G4108) and
       any related litigation in whatsoever manner it sees fit and without any
       need to refer to, consult or seek or obtain any consent or approval of
       the Buyer, NDESL, or their respective successors or assigns in relation
       thereto.  The Buyer shall procure that neither it nor NDESL nor any of
       their respective successors or assigns shall in any way so limit or
       restrict the rights of or impose any obligations upon the Seller or
       Loffland Brothers North Sea Inc in relation to such litigation.  The
       Buyer shall further procure that neither it nor NDESL nor any of their
       respective successors or assigns shall demand payment from the Inland
       Revenue or assert any right to receive payment from the Inland Revenue
       in relation thereto without having obtained the prior consent in writing
       of Loffland Brothers North Sea, Inc.  The Seller shall indemnify and
       keep indemnified the Buyer and the Target Group from and against any
       claims, proceedings, liability, damages, costs and expenses which the
       Buyer or the Target Group may incur or suffer in relation to the
       litigation referred to in this Section 6.2 whatsoever.

6.3    TAX RETURNS. 

       6.3.1  The Seller or its duly authorised agent shall prepare the tax
              returns of the Company and its Subsidiaries for the accounting
              periods ended on or prior to 30 September 1996.

       6.3.2  The Buyer shall procure that the Company and its Subsidiaries
              shall cause the returns mentioned in Section 6.3.1 to be
              authorised, signed and submitted to the appropriate authority
              without amendment or with such amendments as the Seller shall
              agree provided that the Buyer shall not be obliged to procure
              that the Company and its Subsidiaries take any such action as is
              mentioned in this Section 6.3.2 in relation to any tax return
              that is not true and accurate in all material respects.





                                       37
<PAGE>   38
       6.3.2  Subject to Section 6.3.4 the Seller or its duly authorised agent
              shall prepare all documentation and deal with all matters
              (including correspondence) relating to the tax returns of the
              Company and its Subsidiaries for all accounting periods ended on
              or prior to 30 September 1996 and the Buyer shall procure that
              the Company and its Subsidiaries shall afford such access at all
              reasonable times subject to reasonable notice and in a manner so
              as not to interfere unnecessarily with the normal business
              operations of the Company and its Subsidiaries to such books,
              accounts and records as the Seller may require to enable the
              Seller or its duly authorised agent to prepare those returns and
              conduct matters relating thereto in accordance with the Seller's
              rights under this Section.

       6.3.3  The Seller shall keep the Buyer fully informed as to any action
              taken or proposed to be taken in conjunction with Section 6.3.3.

       6.3.4  The Buyer shall afford the Seller the opportunity to make such
              amendments as the Seller reasonably believes are necessary to the
              tax return or tax returns that relate to the period from 1
              October 1996 to Closing provided that the Buyer shall not be
              obliged to procure that the Company and its subsidiaries take any
              such action in relation to any tax return that is not true and
              accurate in all material respects.

       6.3.5  The Buyer shall keep the Seller informed as to any action taken
              or proposed to be taken in conjunction with Section 6.3.5 and
              shall not submit any documentation or correspondence to the
              relevant Taxation Authority until the Seller has approved them,
              such approval not to be unreasonably withheld or delayed.





                                       38
<PAGE>   39
6.4    RELEASE OF GUARANTEES. Abbot shall and shall procure that the Abbot
       Group and the Target Group shall use their respective reasonable
       endeavours to procure that as soon as practicable after Closing the
       Seller and all members of the Retained Group shall be released from any
       guarantee or surety (whether or not listed in Part 1 of Schedule 9 and
       where not so listed as soon as practicable after Abbot or any member of
       Abbot's Group becoming aware of the existence of such guarantee or
       surety) given by any of them to any third party in respect of the
       performance of the obligations of any member of the Target Group under
       the terms of any agreements entered into by any of them which endeavours
       shall include the offering by Abbot of a guarantee in identical terms in
       substitution for the guarantee of the relevant member of the Retained
       Group and pending such release shall indemnify and keep indemnified the
       Seller for itself and as trustee for all members of the Retained Group
       against any and all liabilities, costs, claims, proceedings and damages
       which may arise in connection with any guarantee or surety given in
       respect of the performance of the obligations of any member of the
       Target Group (whether or not listed in Part 1 of Schedule 9) other than
       to the extent that they arise out of any default of the Seller or any
       member of the Retained Group or any member of the Target Group prior to
       Closing.

       6.4.1  On the Closing Date Abbot shall (i) pay to the Seller the sum of
              Pound Sterling 125,000 in the same manner as the Sterling 
              payment is made under Section 2.2.1 or in a manner otherwise
              agreed between Abbot and the Seller (ii) include (and during the
              following six months maintain the inclusion of) each member of
              the Retained Group which is listed as a guarantor in Part I of
              Schedule 9 as an additional insured on such insurance policies as
              are required to comply with the obligations of the Target Group
              under the relevant Contracts, and (iii) at Seller's request,
              supply copies of certificates evidencing the same.  Upon the
              expiry of six months from the Closing Date and on each
              anniversary of such date (or the first subsequent Business Day
              thereafter if such anniversary is
        




                                       39
<PAGE>   40
              not a Business Day) ("the Anniversary Date"), unless on that date
              all members of the Retained Group have been released from all
              guarantees referred to in Section 6.4.1, Abbot shall (i) pay to
              the Seller the sum of Pound Sterling 250,000 in the same manner
              as the Sterling payment is made under Section 2.2.1 or in a
              manner otherwise agreed between Abbot and the Seller and (ii)
              procure that each member of the Retained Group which is listed as
              guarantor in Part 1 of Schedule 9 continues until the following
              Anniversary Date to be included as an additional insured on such
              policies aforesaid and (iii) at the Seller's request supply
              copies of certificates evidencing the same.
        
       6.4.2  In the event that all of the guarantees referred to in Section
              6.4.1 have been released prior to the expiry of six months from
              the Closing Date or prior to the expiry of twelve months from any
              Anniversary Date upon which the last payment was made under
              Section 6.4.2, the Seller shall refund to Abbot such percentage
              of Pound Sterling 125,000 (in the case of the six months
              following the Closing Date) or such percentage of Pound Sterling
              250,000 (in the case of the twelve months between any two
              Anniversary Dates) as is equal to the percentage which the
              unexpired portion of such period represents of the whole of such
              period.
        
       6.4.3  The Seller shall use all reasonable endeavours to procure that as
              soon as practicable after Closing the Target Group shall be
              released from all guarantees and sureties given by any member of
              the Target Group to any third party in respect of the performance
              of the obligations of any member of the Retained Group under the
              terms of any agreements entered into by any of them, which
              includes without limitation those listed in Part 2 of Schedule 9,
              which endeavours shall include the offering by the Seller of a
              guarantee in identical terms in substitution for the guarantee of
              the relevant member of the Target Group and pending such release
              shall indemnify and keep indemnified the Buyer for itself and as
              trustee for all members of the Target Group against any and all
              liabilities, costs, claims, proceedings and damages





                                       40
<PAGE>   41
       which may arise in connection with any such guarantee or surety other
       than to the extent that they arise out of any default of the Abbot Group
       or any member of the Target Group after Closing.
        
6.5    BRITANNIA CONTRACT.  The Buyer shall procure that:

       6.5.1  NDESL and any Relevant Party shall with effect from Closing
              perform all its outstanding obligations under the Britannia
              Contract in the Ordinary Course of Business and so as to ensure
              that the amount of and the timing of payment of the Britannia
              Bonus shall not be adversely affected;

       6.5.2  NDESL and any Relevant Party shall not without the Seller's prior
              written consent assign the Britannia Contract (except for an
              assignment to another member of the Abbot Group if the assignment
              will not adversely affect the amount of or timing of payment of
              the Britannia Bonus) and shall not otherwise divest itself of any
              rights or obligations thereunder in either case during the period
              until the Buyer shall have complied with all of its obligations
              under Section 6.5.6 or until the Seller has been released from
              the guarantee of the Britannia Contract referred to in Part 1 of
              Schedule 9, whichever is later;

       6.5.3  no member of the Abbot Group shall initiate any action nor agree
              to any proposal whereby the terms of the Britannia Contract are
              amended or any other arrangements are entered into which is
              likely to adversely affect the amount of or the timing of payment
              of the Britannia Bonus save (i) with the Seller's written
              consent, which consent (or refusal to consent) shall not be
              unreasonably delayed or (ii) if the Seller has received at the
              date of any such action, amendment or other arrangement referred
              to in this Section 6.5.3, payment from the Buyer or from Abbot of
              a sum equal to the Estimated Bonus





                                       41
<PAGE>   42
              after deduction of a sum representing tax at the Notional Tax
              Rate and the Seller has at such date been released from the
              guarantee of the Britannia Contract referred to in Part 1 of
              Schedule 9;

       6.5.4  NDESL and any Relevant Party shall supply to the Seller
              immediately upon receipt a copy of the monthly cost reports
              prepared by the Independent Operator in connection with the
              Britannia Contract;

       6.5.5  NDESL and any Relevant Party shall use all reasonable endeavours
              to procure that payment of the Britannia Bonus is made by the
              Independent Operator strictly in accordance with the terms of the
              Britannia Contract as at the date hereof or as varied pursuant to
              Section 6.5.3 and in any event within 60 days of the due date
              therefor; and if there is any dispute with the Independent
              Operator as to the amount of the Britannia Bonus payable, neither
              NDESL or any Relevant Party nor any member of the Abbot Group
              shall seek to compromise or settle the amount of such bonus
              without the consent of the Seller; the Seller may at any time
              after the expiry of such 60 day period and shall, after it has
              refused to give its consent to any compromise or settlement, take
              over the conduct of such claim against the Independent Operator
              and the Buyer shall procure that NDESL or any Relevant Party
              shall take such action with respect to the conduct of such claim
              as the Seller shall reasonably request subject to the Seller
              indemnifying and keeping NDESL or any Relevant Party indemnified
              against all costs and expenses thereby incurred;

       6.5.6  not later than 7 days after receipt by NDESL or any Relevant
              Party or any member of the Abbot Group of the Britannia Bonus (or
              any part of it) the Buyer shall, subject to section 6.5.7, pay to





                                       42
<PAGE>   43
              the Seller the amount of such receipt in the currency received
              after deduction of a sum representing tax at the Notional Tax
              Rate.  Such payment shall be made by telegraphic transfer of
              immediately available funds into such bank account of the Seller
              as was specified pursuant to Section 2.2.1 or such other account
              as may previously have been notified in writing by the Seller to
              the Buyer;

       6.5.7  notwithstanding Section 6.5.6, the Buyer shall not be obliged to
              pay over any sums received by NDESL or any Relevant Party or any
              member of the Abbot Group or by any successor or assign of any of
              them by way of Britannia Bonus Account Payment until the date
              upon which such person receives payment of the Drilling
              Facilities Profit as finally determined at which time the Buyer
              shall pay over a sum equal to the Drilling Facilities Profit less
              the sum of all Britannia Bonus Account Payments received by NDESL
              or any Relevant Party prior to the Closing Date net of a sum
              representing tax at the Notional Tax Rate on the amount of such
              payment and such sums shall be treated for all purposes
              thereafter as if they were part of the Drilling Facilities Profit
              portion of the Britannia Bonus;

       6.5.8  interest shall be chargeable at the rate of 3% per annum over the
              base rate of National Westminster Bank plc compounded monthly on
              sums which are overdue under Section 6.5.6, from the due date for
              payment thereunder until the date of actual payment to the
              Seller.





                                       43
<PAGE>   44
6.6    CONTRACTS. The Seller agrees to indemnify the Buyer and keep the Buyer
       indemnified (for itself and as trustee for the benefit of each member of
       the Target Group) from and against all liabilities damages and costs
       arising out of or in connection with any claim or proceedings made
       (whether commenced before or after the date of this Agreement) against
       any member of the Target Group by any other party to any contract
       (including the Contracts) to which any member of the Target Group is or
       has at any time prior to the date of this Agreement been a party as a
       result of any breach prior to Closing by such member of the Target Group
       of any term of such contract (where such breach gives rise to a
       liability for a member of the Target Group in excess of L.50,000) and
       except to the extent that the Buyer has continued such breach after
       Closing, provided always that the liability of the Seller under this
       Section 6.6 shall be limited to the full amount of the claim made by the
       other party to such contract (including any damages awarded to such
       other party for lost profits or without limitation other consequential
       losses) and shall in no circumstances include any other damages, lost
       profits or, without limitation, other consequential losses of the Buyer
       or other member of the Target Group or the Abbot Group (other than the
       costs and expenses of the Buyer or other relevant member of the Target
       Group of defending such claim) resulting from the termination of such
       contract and provided further that the liability of the Seller shall be
       subject to the limitations referred to in Section 8 other than Section
       8.2.

7.     CONDITIONS TO OBLIGATION TO CLOSE.

7.1    CONDITIONS.  Closing shall be subject to the Buyer's rights under
       Section 5.4 and:

       7.1.1  the passing by Abbot's shareholders without amendment of the
              ordinary resolution and the special resolution set out in the





                                       44
<PAGE>   45
              notice of extraordinary general meeting attached to the Abbot
              Circular; and

       7.1.2  the admission to listing of the shares which are the subject of
              the placing and open offer described in the Abbot Circular on the
              London Stock Exchange becoming effective;

       7.1.3  the Seller having complied with its covenants hereunder to
              discharge intercompany and third party indebtedness, to procure
              transfer of the Excluded Assets out of the Target Group and to
              transfer the Drill Pipe and Equipment to NDESL all as more
              particularly detailed in Sections 5.5 to 5.8; and

7.2    The Buyer shall use all reasonable endeavours to procure fulfilment of
       the Condition set out in Sections 7.1.1 and 7.1.2 including without
       limitation making application to the London Stock Exchange not later
       than 14 November 1996 for the admission of the shares which are subject
       to the placing and open offer described in the Abbot Circular; and the
       Seller shall use all reasonable endeavours to procure fulfilment of the
       Condition set out in Section 7.1.3 in each case as soon as possible and
       shall notify the other immediately upon fulfilment of each such
       Condition.

7.3    If either the Buyer, Abbot or the Seller becomes aware of any matter,
       circumstance or thing that might prevent a Condition being satisfied it
       shall immediately notify the other.

7.4    The Buyer shall be entitled to waive the Condition (or any part of it)
       contained in Section 7.1.3 and the Seller shall be entitled to waive the
       Condition contained in Section 7.1.1 so far as it relates to the passing
       of the special resolution but not so far as it relates to the passing of
       the ordinary resolution.





                                       45
<PAGE>   46
8.     LIABILITY UNDER REPRESENTATIONS AND WARRANTIES. The provisions of this
       Section shall operate to limit the liability of the Seller in respect of
       any claim under or in connection with (i) the Warranties referred to in
       Section 4, (ii) Section 6.6 and (iii), except where expressly provided
       to the contrary, the Tax Covenant and references to "claim" and "claims"
       shall be construed accordingly.  The Parties agree as follows:

8.1    AGGREGATE LIABILITY. The maximum aggregate liability of the Seller in
       respect of all claims shall not exceed Pound Sterling 20,000,000;

8.2    SMALL CLAIMS. Except in relation to a claim in respect of Taxation,
       under the Tax Covenant or under Section 6.6 where no such limit applies,
       no liability shall attach to the Seller where the amount of any claim is
       less than Pound Sterling 20,000, such claims being ignored for the 
       purposes of calculating the liability of the Seller under this Agreement;

8.3    DEDUCTIBLE. Except in relation to a claim in respect of Taxation or
       under the Tax Covenant where no such limit applies, no liability shall
       attach to the Seller unless the aggregate amount of all claims for which
       it would, in the absence of this provision, be liable shall exceed
       Pound Sterling 500,000 and in such event the Seller shall only be 
       liable for the excess;

8.4    NOTIFICATION OF CLAIMS.  No claim shall be brought against the Seller
       unless:-

       8.4.1  written particulars thereof (stating in reasonable detail of
              which the Buyer is aware the specific matters in respect of which
              the claim is made) shall have been notified in writing to the
              Seller before in the case of a claim relating to Taxation or
              under the Tax Covenant 31 December 2003 or in relation to any
              other claim 31 March 1998; and





                                       46
<PAGE>   47
       8.4.2  in the case of a claim other than one relating to Taxation or
              under the Tax Covenant proceedings in respect of the claim shall
              have been commenced by being both issued and served within twelve
              months of the giving of such notice and in the case of a claim
              relating to Taxation or under the Tax Covenant proceedings in
              respect of the claim shall have been commenced by being both
              issued and served on or before 31 December 2004;

8.5    NOTIFICATION AS SOON AS PRACTICABLE.  No liability shall attach to the
       Seller in respect of any claim other than a claim relating to Taxation
       or under the Tax Covenant unless notice is given to the Seller of the
       relevant facts of that claim as soon as reasonably practicable and in
       any event no later than 90 days after the senior management of the Buyer
       or any member of Target Group becomes aware thereof provided that a
       failure to comply with this provision shall not prevent the Buyer
       recovering damages for any such claim to the extent it can show that the
       Seller has not been prejudiced by such failure;

8.6    THIRD PARTY CLAIMS.  In the event that a claim other than a claim under
       the Tax Covenant against the Seller arises as a result of or in
       connection with a liability to or a dispute with any third party, then,

       8.6.1  if the sum claimed is Pound Sterling 250,000 or more and if the 
              Seller notifies the Buyer in writing of its wish to have conduct
              of the liability or dispute with the third party, the Buyer shall
              (provided that it is indemnified and kept indemnified by the
              Seller against any costs and expenses which may be incurred by
              the Buyer in taking such action) take and shall procure that the
              relevant member of the Target Group shall take such action to
              avoid, dispute, resist, appeal, compromise or contest such
              liability or dispute as may be reasonably requested by the
              Seller;
        




                                       47
<PAGE>   48
       8.6.2  if the sum claimed is less than Pound Sterling 250,000, and/or 
              until the Seller has elected to have conduct of a given liability
              or dispute under Section 8.6.1, the Buyer shall be free to
              conduct such liability or dispute provided that no such liability
              or dispute shall be admitted, settled or discharged without the
              written consent of the Seller such consent (or refusal to
              consent) not to be unreasonably delayed;
        
       8.6.3  if the Seller shall have refused to give its consent to any
              admission, settlement or discharge, the Buyer may (i) elect to
              retain conduct of the liability or dispute in which event the
              Buyer shall be responsible for the whole amount of any subsequent
              settlement of or judgment in respect of such liability or dispute
              including any associated costs and expenses and shall not be
              entitled to recover all or any part thereof from the Seller or
              (ii) elect that the Seller take over exclusive conduct of the
              liability or dispute in which event the Seller shall be
              responsible for the whole amount of any subsequent settlement of
              or judgment in respect of such liability or dispute including any
              associated costs and expenses less any deductible which may be
              applicable pursuant to Section 8.4 for which the Buyer shall be
              responsible; and

       8.6.4  where the Seller has conduct of any liability or dispute in
              accordance with Sections 8.6.1 to 8.6.3, the Seller shall report
              to the Buyer at intervals of not less than once in a period of
              thirty days.

8.7    CLAIMS AGAINST THIRD PARTIES.  In the event that the Buyer or any member
       of the Target Group is entitled to recover any sum (whether by payment,
       discount, credit or otherwise) from any third party (including any
       Taxation Authority) in respect of any matter for which a claim other
       than a claim under the Tax Covenant could be made against the Seller,





                                       48
<PAGE>   49
       the Buyer shall provided that it is indemnified and kept indemnified by
       the Seller against any costs and expenses which may be incurred by the
       Buyer in relation to such recovery use, or procure that the relevant
       member of the Target Group shall use, all reasonable endeavours to
       recover such sum before making the claim against the Seller, and any sum
       recovered will reduce the amount of the claim (after deduction of all
       reasonable costs and expenses of recovery); and, in the event of the
       recovery being delayed until after the claim has been satisfied by the
       Seller, the Buyer shall account to the Seller in respect of any amount
       so recovered (after deduction of all reasonable costs and expenses of
       the recovery) up to the amount of the claim.  This Section 8.8 shall not
       apply to any entitlement to recover sums by way of Britannia Bonus from
       the Independent Operator, which shall be governed by Section 6.5.

8.8    GENERAL.  No liability shall attach to the Seller in respect of any
       claim other than a claim under the Tax Covenant:

       8.8.1  to the extent that provision or reserve in respect of the matter
              or thing giving rise to such claim has been provided for in the
              Financial Statements or that such matter or thing has been taken
              into account therein or in determining the amount of the
              Consolidated Working Capital;

       8.8.2  if such claim would not have arisen but for a change in the rate
              of Taxation or a change in legislation made after the date hereof
              with retrospective effect any extra statutory concession or
              practice previously made by any Taxation Authority (whether or
              not such change purports to be effective retrospectively in whole
              or in part) or if such claim would not have arisen but for any
              judgment delivered after the date hereof;

       8.8.3  to the extent that such claim would not have arisen but for a
              change in the treatment of assets and liabilities or of the





                                       49
<PAGE>   50
              Taxation attributable to timing differences (including capital
              allowances) in future accounts of the Target Group or but for any
              other change in the accounting bases upon which the Target Group
              prepares its future accounts except to the extent necessary to
              rectify any non compliance with GAAP as at the date of this
              Agreement;

       8.8.4  to the extent that such claim relates to any loss for which the
              Buyer or any member of the Target Group is indemnified by
              insurance;

       8.8.5  if and to the extent that such claim would not have arisen or
              would have been reduced or eliminated but for a failure on the
              part of any member of the Target Group to make any claim,
              election, surrender or disclaimer or give any notice or consent
              or do any other thing after Closing the making, giving or doing
              of which was taken into account in preparing the Financial
              Statements or determining the Consolidated Working Capital;

       8.8.6  to the extent that the claim or breach would not have arisen but
              for some act, omission, transaction or arrangement whatsoever
              carried out at the written request or with the written approval
              of the Buyer prior to Closing or which was expressly authorised
              by the Agreement.

8.9    USE OF RELIEFS.  Where and to the extent that there are available to the
       Target Group any reliefs, rights of repayment or other rights or claims
       of a similar nature to set against or otherwise mitigate any liability
       arising from any claim for Taxation giving rise to a claim under the
       Warranties or the Tax Covenant and such reliefs, rights of repayment or
       other rights or claims have not been taken into account in computing and
       so reducing or eliminating any provision for deferred Taxation or
       treated as an asset in the Consolidated Working Capital Statement





                                       50
<PAGE>   51
       wholly by reason of any act, omission or transaction of any member of
       the Target Group before the date of Closing, credit for any such
       reliefs, rights of repayment or other rights or claims shall be given to
       the Seller to the extent that they can be set off against the liability
       in question.

8.10   CESSER OF LIABILITY.  The liability of the Seller shall cease and any
       subsisting claim which relates to the business or assets of any member
       of the Target Group shall be withdrawn upon that member of the Target
       Group or its business or substantially all of its assets ceasing for any
       reason within the twelve months after the date of Closing to be directly
       or indirectly controlled by Abbot.

8.11   WARRANTIES EXCLUSIVE.  The Buyer, other than in relation to the
       representations and warranties contained in Sections 3.1 and 4, waives
       any remedies it may have under the Misrepresentation Act 1967 and any
       remedy it may have for breach of warranty in relation to any information
       (written or oral), statements or warranties or representations of any
       description made, supplied or given by the Seller or any member of the
       Retained Group or the Target Group or the officers, agents, employees or
       advisers of any of them in relation to the assets and liabilities of the
       Target Group, their value or amount, or the business or affairs of the
       Target Group.

8.12   WAIVER OF RESCISSION.  The Buyer shall not be entitled to rescind this
       Agreement in any circumstances other than as provided in Section 5.4.

8.13   REDUCTION OF CONSIDERATION.  If the Seller pays any sum to the Buyer
       pursuant to a claim, the Purchase Price shall be deemed to be reduced by
       the amount of such payment.





                                       51
<PAGE>   52
8.14   MITIGATION OF LOSS.  Nothing in this Section 8 shall limit or restrict
       the Buyer's general obligation at law to mitigate any loss or damage
       which it may incur in consequence of any matter giving rise to a
       potential claim under this Agreement.

8.15   BREACH OF THE CONTRACTS.  In addition to the other limitations set out
       in this Section 8, the liability of the Seller in respect of any claim
       by any member of the Abbot Group under or in connection with paragraphs
       8.1 and 8.3 of the Warranties in Schedule 8 shall be limited to the
       amount required to remedy the breach of the applicable law or to obtain
       the relevant Licence.

8.16   DOUBLE CLAIMS.  No claim shall be made under the Warranties in respect
       of any matter for which a claim has been made under Section 6.6 of this
       Agreement or under the Tax Covenant or vice versa.

9.     TERMINATION

9.1    TERMINATION OF AGREEMENT.  The Buyer and Seller may terminate this
       Agreement by mutual written consent at any time prior to the Closing.

9.2    EFFECT OF TERMINATION.  If any Party terminates this Agreement pursuant
       to Section 9.1, Section 2.5.3 and Section 5.4 all rights and obligations
       of the Parties hereunder shall terminate without any liability of any
       Party to any other Party; provided, however, that the confidentiality
       provisions contained in Section 12 and the provisions of Section 14
       (other than Sections 14.5, 14.9 and 14.13) shall survive termination and
       further provided that such termination shall be without prejudice to the
       rights of any Party to claim in respect of any breach of this Agreement
       by any other Party.





                                       52
<PAGE>   53
10.    TAX

10.1   In relation to Taxation the provisions of Schedule 7 shall apply.

10.2   Not later than 7 days after receipt by NDESL or any Relevant Party or
       any member of the Abbot Group of a Tax Refund received in connection
       with the litigation referred to in Section 6.2 the Buyer shall pay to
       the Seller a sum equal to the amount of the Tax Refund after deduction
       of any Liability for Taxation thereon of NDESL or any Relevant Party or
       any member of the Abbot Group related to such Tax Refund.  Such payment
       shall be made by telegraphic transfer of immediately available funds
       into such bank account of the Seller as was specified pursuant to
       Section 2.2.1 or such other account as may be nominated by the Seller.
       For the avoidance of doubt, if any Tax Refund is received by any member
       of the Retained Group, such member shall be entitled to retain the same
       and shall be entitled to set off the obligation of the Buyer pursuant to
       this Section 10.2 against any obligation of Loffland Brothers North Sea,
       Inc to make payment of any Tax Refund to NDESL pursuant to the agreement
       between Loffland Brothers North Sea, Inc and NDESL dated 21 September
       1990.

10.3   If after any payment is made pursuant to Section 10.2 and the receipt by
       NDESL or any Relevant Party or any member of the Abbot Group of the
       relevant Tax Refund gives rise to a Liability for Taxation of NDESL or
       any Relevant Party or any member of the Abbot Group then (if and to the
       extent that the amount of the Liability for Taxation was not deducted
       from the payment made by the Buyer pursuant to Section 10.2) the Seller
       shall pay to the Buyer (by way of refund of any amount paid pursuant to
       Section 10.2) an amount (which is after taking into account any Taxation
       payable on such amount) equal to such Liability for Taxation such
       payment to be made five days after the Buyer shall serve notice on the
       Seller demanding payment.





                                       53
<PAGE>   54
11.    PROTECTION OF GOODWILL.

11.1   The Seller undertakes to the Buyer that, without the written consent of
       the Buyer:-

       11.1.1 in respect of any and all fixed platforms located in the United
              Kingdom Continental Shelf, for a period of 3 years from Closing
              it will not and will procure that no other member of the Retained
              Group shall directly or indirectly and whether as principal,
              agent, shareholder or partner, enter into or offer to enter into
              any agreement for the provision of (i) labour only services of
              substantially the same type and for substantially the same
              purposes as those services presently provided by members of the
              Target Group pursuant to the Contracts or (ii) the services of
              managing platform drilling crews, maintaining platform drilling
              equipment and providing engineering services relating to drilling
              facilities; and

       11.1.2 it will not and will procure that no other member of the Retained
              Group will directly or indirectly and whether as principal,
              agent, shareholder or partner, for a period of 2 years from
              Closing offer employment to any person who is at the date of this
              Agreement and/or was at Closing an employee employed in a
              managerial, technical or sales capacity by any member of the
              Target Group nor do any act or thing intended to cause any such
              employee to terminate his employment with any member of the
              Target Group, whether or not such employee would thereby breach
              his contract of employment.

11.2   Nothing in Section 11.1 shall prevent the Seller or any member of the
       Retained Group from acquiring any company or business or acquiring an
       interest in such company or business whether as principal, agent,





                                       54
<PAGE>   55
       shareholder or partner where part of such business ("the Competing
       Part") comprises the provision of labour services or Relevant Services
       of the type and in the geographic area referred to in Section 11.1,
       provided:

              (i)       that such Competing Part does not comprise a majority
                        (calculated by reference to its profits on ordinary
                        activities before Taxation) of the business acquired;
                        and

              (ii)      that, to the extent the Seller or any member of the
                        Retained Group acquires operating control of the
                        Competing Part, it shall exercise its right of control
                        to procure that the Competing Part does not offer to
                        provide (for the period and in the geographic area
                        referred to in Section 11.1) labour services or
                        Relevant Services of the type referred to in Section
                        11.1 the result of which would be the loss of a
                        contract pursuant to which any member of the Abbot
                        Group is providing at the date of such acquisition
                        substantially the same services provided pursuant to
                        any other contracts to which any member of the Abbot
                        Group may at the date of such acquisition be party.

11.3   The Buyer hereby agrees with the Seller that for the period of 3 years
       from Closing neither the Buyer nor any member of the Abbot Group shall
       offer to provide (for the period and in the geographic area referred to
       in Section 11.1) labour services or Relevant Services of the type
       referred to in Section 11.1 the result of which would be the loss of a
       contract pursuant to which the Competing Part is providing at the date
       of such acquisition substantially the same services.

11.4   Nothing in Section 11.1.2 shall prevent the Seller or any member of the
       Retained Group from offering employment to any of the employees





                                       55
<PAGE>   56
       listed in Part 1 of Schedule 4 (i) at any time after the expiry of six
       months from Closing if they shall by that time have been or at any time
       thereafter are, made redundant or (ii) at any time prior to Closing.

11.5   Each of the undertakings contained in Section 11.1 is separate and
       severable and shall be construed on that basis.  If any of such
       undertakings is found to be void but would be valid if some part of it
       were deleted or if the period or extent of it were reduced such
       undertaking shall apply with such modification as may be necessary to
       make it valid and effective.

11.6   For the avoidance of doubt, the provisions of Section 11 shall not
       extend (i) to any activities carried out by the Seller or any other
       member of the Retained Group in respect of the Excluded Assets; nor (ii)
       to any supply or offer to supply labour services in connection with the
       sale, supply, leasing or other provision of any rig which uses the
       "Sundowner" technology.

11.7   If Closing of this transaction shall not occur on or before 21 November
       1996, Abbot shall not and shall procure that no member of the Abbot
       Group shall for a period of three years following the date of this
       Agreement provide services to those persons who are currently
       independent operators under the Contracts or wireline contracts of a
       type which are provided under the Contracts or wireline contracts as at
       the date of this Agreement in respect of the platforms to which those
       Contracts relate.  This Section 11.7 shall cease to apply upon the
       Seller ceasing to own a majority of the ordinary shares of NDESL or if,
       in respect of any given Contract, such Contract is terminated and NDESL
       is not permitted to tender for the renewal or extension of the Contract
       in question.





                                       56
<PAGE>   57
12.    CONFIDENTIAL INFORMATION

12.1   The Seller shall before and after Closing not make use of or disclose to
       any person Confidential Information belonging to the Target Group, take
       all reasonable steps to prevent the use or disclosure by any member of
       the Retained Group of Confidential Information belonging to and/or used
       by the Target Group and procure that each member of the Retained Group
       complies with the provisions of this Section 12.

12.2   Section 12.1 does not apply to use or disclosure of Confidential
       Information required to be used or disclosed by law, a court of
       competent jurisdiction or by the London Stock Exchange or any exchange
       on which the Seller's shares are traded or to the disclosure of
       Confidential Information to a director, officer or employee of the Buyer
       or to an employee of the Target Group whose function requires that he
       has possession of the Confidential Information or disclosure of
       Confidential Information to an adviser for the purposes of advising the
       Seller in connection with this Agreement or Confidential Information
       which becomes publicly known except as a result of the Seller's breach
       of Section 12.1.

12.3   Section 12.1 does not apply to the use or disclosure of Confidential
       Information belonging to and for use by the Target Group in respect of
       or in any way connected with the Excluded Assets or in any way connected
       with Sundowner or Canrig technology.

12.4   Abbot covenants not to make use of or disclose and to take all
       reasonable steps to prevent the use or disclosure by any member of the
       Abbot Group of any Sundowner or Canrig technology or information
       relating thereto which it may have in its possession.





                                       57
<PAGE>   58
13.    GUARANTEE

13.1   In consideration of the Seller entering into this Agreement, Abbot
       hereby unconditionally and irrevocably guarantees to the Seller the due
       and punctual performance and observance by the Buyer of its obligations,
       undertakings, warranties, indemnities and covenants under or pursuant to
       this Agreement and the Ancillary Documents and agrees to indemnify and
       keep indemnified the Seller against all losses, damages, costs and
       expenses (including legal costs and expenses) which the Seller may
       suffer through or arising from any breach by the Buyer of such
       obligations, warranties, undertakings, indemnities or covenants.  The
       liability of Abbot as aforesaid shall not be released or diminished by
       any arrangements or alterations of terms (whether of this Agreement or
       the Ancillary Documents or otherwise) or any forbearance, neglect or
       delay in seeking performance of the obligations hereby imposed or any
       granting of time for such performance.

13.2   If and whenever the Buyer defaults for any reason whatsoever in the
       performance of any obligation or liability undertaken or expressed to be
       undertaken by it under or pursuant to this Agreement or the Ancillary
       Documents, Abbot shall forthwith upon demand unconditionally perform (or
       procure performance of) and satisfy (or procure the satisfaction of) the
       obligation or liability in regard to which such default has been made in
       the manner prescribed by this Agreement or the Ancillary Documents (as
       the case may be) and so that the same benefits shall be conferred on the
       Seller or any member of the Retained Group as it would have received if
       such obligation or liability had been duly performed and satisfied by
       the Buyer.  Abbot hereby waives any rights which it may have to require
       the Seller to proceed first against or claim payment from the Buyer to
       the intent that as between the Seller and Abbot the latter shall be
       liable as principal debtor as if it had entered





                                       58
<PAGE>   59
       into all undertakings, agreements and other obligations jointly and
       severally with the Buyer.

13.3   This guarantee and indemnity is to be a continuing security to the
       Seller for all obligations, warranties, undertakings, indemnities and
       covenants on the part of the Buyer under or pursuant to this Agreement
       and the Ancillary Documents notwithstanding any settlement of account or
       other matter or thing whatsoever.

13.4   This guarantee and indemnity is in addition to and without prejudice to
       and not in substitution for any rights or security which the Seller may
       now or hereafter have or hold for the performance and observance of the
       obligations, undertakings, covenants, indemnities and warranties of the
       Buyer under or in connection with this Agreement or the Ancillary
       Documents.

13.5   In the event of Abbot having taken or taking any security from the Buyer
       in connection with this guarantee and indemnity, Abbot hereby undertakes
       to hold the same in trust for the Seller pending discharge in full of
       all Abbot's obligations under this Agreement and the Ancillary
       Documents.  Abbot shall not, after any claim has been made pursuant to
       this Section 13, claim from the Buyer any sums which may be owing to it
       from the Buyer or have the benefit of any set-off or counter-claim or
       proof against or dividend, composition or payment by the Buyer until all
       sums owing to the Seller in respect hereof shall have been paid in full.

13.6   As a separate and independent stipulation, Abbot agrees that any
       obligation expressed to be undertaken by the Buyer under this Agreement
       or the Ancillary Documents (including, without limitation, any moneys
       expressed to be payable under this Agreement) which may not be
       enforceable against or recoverable from the Buyer by reason of any legal
       limitation, disability or incapacity of any of them or any other fact or
       circumstance shall nevertheless be enforceable against or





                                       59
<PAGE>   60
       recoverable from Abbot as though the same had been incurred by Abbot and
       Abbot were sole or principal obligor in respect thereof and shall be
       performed or paid by Abbot on demand.

14.    MISCELLANEOUS

14.1   PRESS RELEASES AND PUBLIC ANNOUNCEMENTS.  No Party shall issue any press
       release or make any public announcement relating to the subject matter
       of this Agreement without the prior written approval of the others;
       provided, however, that any Party may make any public disclosure if
       required by applicable law, a court of competent jurisdiction, the
       London Stock Exchange, the Securities and Exchange Commission or any
       listing or trading agreement concerning its publicly-traded securities
       (in which case the disclosing Party will, where practicable, use its
       reasonable endeavours to advise and consult with the other Party as to
       the contents prior to making the disclosure.  This shall not apply to
       announcements made or sent by the Buyer after Closing advising
       customers, suppliers and others who have dealings with the Target Group
       of the change in control of the Target Group.

14.2   NO THIRD-PARTY BENEFICIARIES. This Agreement shall not confer any rights
       or remedies upon any Person other than the Parties and their respective
       successors and permitted assigns.

14.3   ENTIRE AGREEMENT.  This Agreement (including the Ancillary Documents)
       constitutes the entire agreement among the Parties and supersedes any
       prior understandings, agreements, or representations by or among the
       Parties, written or oral, to the extent they have related in any way to
       the subject matter hereof.

14.4   SUCCESSION AND ASSIGNMENT.  This Agreement shall be binding upon and
       inure to the benefit of the Parties named herein and their respective
       successors and permitted assigns.  No Party may assign either this





                                       60
<PAGE>   61
       Agreement or any of its rights, interests, or obligations hereunder
       without the prior written approval of the other Parties except, after
       Closing, to any wholly-owned subsidiary.  No such assignment shall
       relieve the assignor of any obligations under this Agreement.

14.5   COUNTERPARTS. This Agreement may be executed in one or more
       counterparts, each of which shall be deemed an original but all of which
       together will constitute one and the same instrument.

14.6   HEADINGS. The section headings contained in this Agreement are inserted
       for convenience only and shall not affect in any way the meaning or
       interpretation of this Agreement.

14.7   NOTICES. All notices, requests, demands, claims, and other
       communications hereunder ("notices") will be in writing. Any notice
       hereunder shall be deemed duly given if delivered personally at the
       address shown below or if it is sent by first class recorded delivery
       post or certified airmail, postage prepaid, and addressed to the
       intended recipient as set forth below:


       If to the Seller: Nabors Industries Inc.   Copy to: Baker & McKenzie
                         515 West Greens Road              100 New Bridge Street
                         Suite 1200                        London  EC4V 6JA
                         Houston
                         Attention: President              Attention: HS/SCH/APD

       If to the Buyer:  KCA Drilling Group       Copy to: Pinsent Curtis
                         Limited                           Dashwood House
                         Minto Drive, Altens               69 Old Broad Street
                         Aberdeen  AB12 3LW                London
                         Attention: Company Secretary      Attention: AF/CP





                                       61
<PAGE>   62

       If to Abbot:      Abbot Group Plc          Copy to: Pinsent Curtis
                         Minto Drive                       Dashwood House
                         Altens                            69 Old Broad Street
                         Aberdeen  AB12 3LW                London
                         Attention: Company Secretary      Attention: AF/CP


       A Party may change the address to which notices are to be delivered by
       giving the other Parties notice in the manner herein set forth.  Any
       notice delivered personally, shall be deemed served at the time of
       delivery, if delivered by recorded delivery other than airmail two days
       after posting and if sent by airmail five days after posting or if such
       day is not a Business Day then the next following Business Day.

14.8   GOVERNING LAW. This Agreement shall be governed by and construed in
       accordance with the laws of England without giving effect to any choice
       or conflict of law provision or rule whether of England or any other
       jurisdiction that would cause the application of the laws of any
       jurisdiction other than England and the Parties hereto submit to the
       non-exclusive jurisdiction of the English courts.  The Seller hereby
       agrees that service of any legal proceedings may be made on it by
       delivering them to the London office of its solicitors, Baker & McKenzie
       and the Buyer and Abbot each hereby agree that service of any legal
       proceedings may be made on it by delivering them to its solicitors,
       Pinsent Curtis.

14.9   AMENDMENTS.  No amendment of any provision of this Agreement shall be
       valid unless the same shall be in writing and signed by the Parties.

14.10  WAIVER.  The failure by any Party to exercise or delay in exercising any
       right or remedy under this Agreement shall not constitute a waiver of
       the right or remedy or a waiver of any other rights or remedies that
       Party may otherwise have and no single or partial exercise of any right





                                       62
<PAGE>   63
       or remedy under this Agreement shall prevent any further exercise of the
       right or remedy or the exercise of any other right or remedy.

14.11  SEVERABILITY.  Any term or provision of this Agreement that is invalid
       or unenforceable in any situation in any jurisdiction shall not affect
       the validity or enforceability of the remaining terms and provisions
       hereof or the validity or enforceability of the offending term or
       provision in any other situation or in any other jurisdiction.

       14.12    EXPENSES  

       14.12.1  Subject to the remainder of this Section 14, each of
                the Buyer, Abbot and the Seller will bear its own costs and
                expenses (including legal fees and expenses) incurred in
                connection with this Agreement and the transaction contemplated
                hereby.

       14.12.2  If Closing does not occur on or before 21 November 1996
                otherwise than as a result of the Buyer lawfully exercising its
                right to rescind this Agreement pursuant to Section 5.4.1, the
                Seller shall have the following remedies:

                14.12.2.1  Abbot shall forthwith upon the expiry of such period
                           pay to the Seller the sum of L.1,000,000 being a sum
                           agreed between the parties as representing
                           compensation for the costs, expenses and management
                           time that has been incurred by the Seller and its
                           Affiliates in relation to the proposed sale of the
                           Company Shares.  By way of security for the
                           liability of the Buyer under this Section 14.12.2.1,
                           the Buyer shall at the date of this Agreement pay
                           the sum of L.1,000,000 into a separately designated
                           interest-bearing deposit account with National
                           Westminster Bank Plc (the "Escrow Account") which
                           account shall be free from any lien,





                                       63
<PAGE>   64
                           charge, encumbrance, set-off or counterclaim and
                           which shall be operated as provided in Schedule 11.

                14.12.2.2  From the outset of the negotiations leading to this
                           Agreement, the parties have agreed that if this
                           Agreement could not be executed and the transaction
                           closed on essentially a simultaneous basis, then one
                           of the risks of the transaction's failure to close,
                           specifically the risk of loss of profit as a
                           consequence of any termination of a Contract,
                           regardless of the cause of such termination would be
                           borne by Abbot and the Buyer.

                           The parties understand that as a consequence of the
                           requirement for Abbot to obtain the approval of its
                           shareholders for such transaction pursuant to the
                           Listing Rules of the London Stock Exchange a
                           simultaneous execution and closing is not possible.
                           Accordingly, without prejudice to and in addition to
                           the Seller's rights under Section 14.12.2.1 and
                           14.12.2.3, if, after signing of this Agreement, a
                           Contract is terminated (otherwise than by a member
                           of the Target Group or its successors or assigns) or
                           a notice of termination of a Contract is sent to any
                           member of the Target Group or its successors or
                           assigns, then Abbot and the Buyer will be jointly
                           and severally liable for all losses, damages, costs
                           and expenses suffered by the Seller in connection
                           with such termination including without limitation,
                           lost profits for what would have been the remainder
                           of the principal term of the Contract had it not
                           been terminated.





                                       64
<PAGE>   65
                14.12.2.3  Without prejudice to, and in addition to the
                           Seller's rights under Sections 14.12.2.1 and
                           14.12.2.2, the Seller reserves its rights to claim
                           all losses, damage, costs and expenses suffered by
                           the Seller or any member of the Target Group
                           resulting from the inability to consummate the
                           execution and Closing of the sale of the Company
                           Shares on a simultaneous basis.

                14.12.2.4  The remedies specified in Sections 14.12.2.1 to
                           14.12.2.3 shall be without prejudice to any other
                           remedies the Seller may have resulting from a breach
                           by the Buyer or Abbot of this Agreement.

14.13  RTPA.  No party shall give effect to or enforce any restrictions
       contained in this Agreement or any agreement or arrangement of which
       this Agreement forms part and by virtue of which particulars of this
       Agreement (or the relevant agreement or arrangement) are required to be
       furnished under the RTPA until particulars have been duly furnished to
       the Director General of Fair Trading as required by the RTPA.





                                       65
<PAGE>   66
                                   SCHEDULE 1
                                COMPANY DETAILS

Part 1 - Nabors Europe Limited

Registered number:          1189464
Registered office:          Plumtree Court, London EC4A 4HT
Authorised share capital:   Pound Sterling 200 divided into 200 Ordinary 
                            Shares of Pound Sterling 1 each
Issued share capital:       Pound Sterling 102 divided into 102 Ordinary 
                            Shares of Pound Sterling 1 each
Shareholders:               Nabors Industries Inc - 101 Ordinary Shares of
                            Pound Sterling 1 each P&W Trustees (Aberdeen) 
                            Ltd - 1 Ordinary Share of Pound Sterling 1
Accounting Reference Date:  30 September
Directors:                  Garry Robert Allan
                            Larry Philip Heidt
                            Angus Petrie
Secretary:                  Garry Robert Allan

Part 2 Nabors Drilling and Energy Services (UK) Limited

Registered number:          SC125584
Registered office:          Kirkton Avenue
                            Pitmedden Road Industrial Estate
                            Aberdeen, Grampian AB2 0DP
Authorised share capital:   Pound Sterling 4,217,002 divided into 4,217,002 
                            Ordinary Shares of Pound Sterling 1 each
Issued share capital:       Pound Sterling 4,216,904 divided into 4,216,904 
                            Ordinary Shares of Pound Sterling 1 each
Shareholders:               Nabors Europe Limited - 4,216,903 Ordinary Shares
                            of Pound Sterling 1 each





                                       66
<PAGE>   67
                            P&W Trustees (Aberdeen) Limited - 1 Ordinary Share
                            of Pound Sterling 1
Accounting Reference Date:  30 September
Directors:                  Garry Robert Allan
                            Joseph Bruce
                            Larry Philip Heidt
                            Ewan Angus McLeod
                            Ernest Winston Simpson Nelson
                            Angus Petrie
Secretary:                  Garry Robert Allan

Part 3 - Thistle Well Services Limited

Registered number:          SC138344
Registered office:          Kirkton Avenue
                            Pitmedden Road Industrial Estate
                            Aberdeen, Grampian AB2 0DP7
Authorised share capital:   Pound Sterling 100,000 divided into 100,000 
                            Ordinary Shares of Pound Sterling 1 each
Issued share capital:       Pound Sterling 100,000 divided into 100,000 
                            Ordinary Shares of Pound Sterling 1 each
Shareholders:               Nabors Drilling and Energy Services (UK) Limited
                            99,999 Ordinary Shares of Pound Sterling 1 each 
                            P&W Trustees (Aberdeen) Limited - 1 Ordinary Share 
                            of Pound Sterling 1
Accounting Reference Date:  30 September
Directors:                  Garry Robert Allan
                            Larry Philip Heidt
                            Ewan Angus McLeod
                            Angus Petrie
Secretary:                  Garry Robert Allan





                                       67
<PAGE>   68
                                   SCHEDULE 2
         CONSOLIDATED WORKING CAPITAL STATEMENT - ACCOUNTING PRINCIPLES

The Working Capital Statement shall be prepared on the following basis:-

1.     GENERAL REQUIREMENTS

       (a)    as if the period from 30 September 1995 to the Closing Date were
              a financial period of the Target Group;

       (b)    in accordance with the requirements of all relevant statutes and
              generally accepted accounting principles and practices in the
              United Kingdom.

2.     SPECIFIC REQUIREMENTS

       (a)    TAX

              including full provision for Taxation (including deferred tax) up
              to and including the Closing Date and for the avoidance of doubt
              shall include corporation tax due, if any, as a result of (i) the
              transfer of Excluded Assets as detailed in Section 5.6 (ii) the
              repayment or discharge of indebtedness due to any bank or
              financial institution as detailed in Section 5.5 (iii) the
              cancellation or discharge or the intercompany loan account and
              all accounts due to HM Customs and Excise in respect of their
              enquiry into breaches of rules of the Company's IPR System, as
              detailed in the Disclosure Letter;





                                       68
<PAGE>   69
       (b)    PROVISION FOR EMPLOYEES

              including full provision to the extent required by GAAP for
              redundancy and all other employees costs engaged on the Elf and
              Oryx Contracts.

       (c)    STOCK

              Stocks are stated at the lower of cost and net realisable value.
              In general cost is calculated on an average cost basis.  Net
              realisable value is calculated by reference to the estimated
              selling prices less cost of realisation.

              Provision is made for obsolescent and slow moving stocks against
              specific stock items identified by management of the company,
              when the stock is considered to be of nil operational value.

       (d)    DEBTORS

              Sales regarding labour are recognised in accordance with terms of
              contracts.  Sales regarding equipment hire are recognised on a
              daily basis.

              Incentive well profit is recognised in the month in which the
              well is determined to have been completed.

              Foreign currency sales are translated at the average rate ruling
              in the month of the work being carried out.

              Trade debtors are stated at their invoice value after any
              provision for bad or doubtful debts.  A debtor is considered
              receivable on the earliest date on which payment is due, rather
              than on the earliest date on which payment is expected.





                                       69
<PAGE>   70
              Provision for bad debts is considered after a monthly review of
              the aged debt report.  Where customers have become insolvent or
              in liquidation provision is made in full.  When payment is
              overdue management adopt standard credit control procedures.
              When these procedures are exhausted full provision is made.

              Intercompany balances representing transactions with group
              companies are reconciled and agreed on a monthly basis.

              Prepayments are calculated on a time apportionment basis by
              amounts paid pre year end which relate to post year end.

              Accrued income includes work that has been carried out pre year
              end, but for which a sales invoice has not been raised by the
              year end.

       (e)    CASH AT BANK AND IN HAND

              Cash at bank and in hand includes cash in hand and deposits
              denominated in foreign currencies translated into sterling at the
              period end rate of exchange.  Deposits are included where they
              are repayable on demand with any bank.

       (f)    CREDITORS: AMOUNTS FALLING DUE WITHIN ONE YEAR

              Liabilities are recognised when the goods or services have been
              received.

              Trade creditors represent amounts owed to suppliers of goods and
              services which have been approved for payment and processed
              through the purchase ledger for payment.





                                       70
<PAGE>   71
              Loan creditor relates to the amount that is repayable within one
              year.

              Corporation tax creditor relates to the tax charge for the year,
              and any prior years that have not yet been paid.

              PAYE and social security creditor relates to the liability for
              the last month of the year to be paid the following month.  Also
              any other PAYE and National Insurance liabilities that have not
              been paid.

              Accruals represent the costs of goods received or services
              provided where these have not been processed through the purchase
              ledger.





                                       71
<PAGE>   72
                                   SCHEDULE 3
                                   CONTRACTS

(1)    Contract BRT1 - XA1 - Detail Design of Drilling Facilities and Drilling
       Operations and Maintenance.

       Parties:  Chevron U.K. Limited (1)
                 Nabors Drilling & Energy Services U.K. Limited (2)

       Date:     1 November 1994

       As amended by Amendment numbers 1 to 4 to Contract No. BRT1 XA1 dated 1
       November 1994, 1 April 1995, 1 September 1995 and 11 March 1996
       respectively.  (Refer to paragraph 11.1 of Schedule 8)

(2)    Contract ALB-1038 - Alba Field Development Northern Platform.

       Parties:  Chevron U.K. Limited (1)
                 Loffland Nabors U.K. Limited (now NDESL) (2)

       Date:     28 October 1991

       As amended by Amendment numbers 1 to 4 and 6 to 8 to Contract ALB - 1038
       dated 5 March 1992, 23 November 1992, 22 February 1993, September 1993,
       1 September 1994, 22 November 1994 and 1 October 1994 respectively.
       (Refer to paragraph 11.1 of Schedule 8)


(3)    Contract CNS-7174 - Integrated Drilling Services and Well Services -
       Ninian Field Operations.

       Parties:  Chevron U.K. Limited (1)
                 Nabors Drilling & Energy Services U.K. Limited (2)

       Date:     1 January 1994





                                       72
<PAGE>   73
       As amended by Amendment numbers 1 to 3 to Contract CNS - 7174 dated 22
       November 1994, 1 January 1995 and 1 July 1995 respectively.  (Refer to
       paragraph 11.1 of Schedule 8)

(4)    Contract W038 - Drilling, Well Intervention and Rig Maintenance Services
       on the Hutton and Murchison Platforms.

       Parties:  Oryx U.K. Energy Company (1)
                 Nabors Drilling & Energy Services U.K. Limited (2)

       Date:     23 February 1995

(5)    Contract C.A. 7400 - Provision of Platform Drilling Services.

       Parties:  Elf Enterprise Caledonia Ltd. (1)
                 Nabors Drilling & Energy Services U.K. Limited (2)

       Date:     15 July 1995

       As amended by Amendment number 1 to Contract CA. 7400 dated 24 April
       1996.  The letter referred to at Document 7.1/a/3/2 constitutes a de
       facto amendment to Contract CA. 7400. (Refer to paragraph 11.1 of
       Schedule 8)





                                       73
<PAGE>   74
                                   SCHEDULE 4
                          PART 1 - EXCLUDED EMPLOYEES

L. Heidt
E. Nelson
J. Bruce
C. Simpson
R. Morrison

              PART  2 - EMPLOYEES INCLUDED IN REDUNDANCY ADJUSTMENT

<TABLE>
<CAPTION>
NAME                                                                       TOTAL
<S>                                                                    <C>
Janet Ogg                                                              12,175,05
Shaun Huo                                                               4,781.50
Fiona Hay                                                               2,521.75
Else Salem                                                              1,927.22
Charlie Kidd                                                            5,090.67
Charlie Kidd                                                           11,000.00
Donna Cook                                                              1,507.57
Dan Wilton                                                              7,386.98
Calum Macdonald                                                         3,904.80
Laura Cameron                                                             752.56
Ian Penman                                                             10,968.26
Alistair Currie                                                         4,779.11
Stuart Souter                                                           1,428.56
Jimmy White                                                            20,000.00

TOTALS                                                                 88,224.03
</TABLE>





                                       74
<PAGE>   75
                                   SCHEDULE 5
                                EXCLUDED ASSETS

Part 1 - Residential Property:

a)     Dwellinghouse located at 5 Milltimber
       Brae East, Milltimber, Aberdeen

b)     Dwellinghouse located at 134 Deeside
       Gardens, Aberdeen

Part II - Assets assigned to US Branch:

The drilling rigs identified below together with pipe and all related assets
and supplies located and supplied in the USA including receivables and trade
payables:

(i)    Drilling Rig No. 518, a Gardner Denver
       1500.-E, located in the United States.

(ii)   Drilling Rig No. 90, a National 100-UE,
       located in the United States.

(iii)  Drilling Rig No. 93, a Gardner Denver
       1320-UE, located in the United States.

(iv)   Drilling Rig No. 273, a National 1320-
       UE, located in the United States.

Part III - Bids, tenders, proposals and information of a like nature relating
to:

(i)    The activities of Sundowner and its
       technology.





                                       75
<PAGE>   76
(ii)   The activities of Canrig and its
       technology.

(iii)  BHP Prirazlomnoye Project.

(iv)   Texaco Mariner Project.

(v)    All other bids, tenders and proposals
       and related working papers prepared by
       the Target Group, or any of them, which
       have not resulted in a contract being
       awarded to the Target Group, or any of
       them, and whose validity has expired by
       reason of the passing of time.


Part IV - Paloak Shares

99,900 shares of L.1 each in Paloak Limited

The Gleneagles Oilman's (AOGA) Sponsorship





                                       76
<PAGE>   77
                                   SCHEDULE 6
                                   PROPERTIES

1.     Lease of Main Building - sites 15 & 23 Kirkton Avenue Pitmedden Road
       Industrial Estate, Dyce, Aberdeen.

       Date:     21 October 1981 and 9 November 1981

       Parties:  Kabell (Management and Development) Limited (1)
                 Loffland Brothers North Sea Inc. (2)

2.     Lease of Site 19 Pitmedden Road Industrial Estate, Dyce, Aberdeen.

       Date:     10 January 1992 and 5 February 1992

       Parties:  The Grampian Regional Council (1)
                 Loffland Nabors U.K. Limited (2)

3.     Lease of sites 21 & 22 Pitmedden Road Industrial Estate, Dyce, Aberdeen

       Date:     25 November 1991 and 23 December 1991

       Parties:  The Grampian Regional Council (1)
                 Loffland Nabors U.K. Limited (2)

4.     Lease of Unit 6, International Base, Greenwell Road, East Tullos,
       Aberdeen.

       Date:     26 June 1992 and 6 July 1992

       Parties:  Citygate Court Property Limited (1)
                 Thistle Well Services Limited (2)





                                       77
<PAGE>   78
5.     Lease of Units 7 and 8 and Office Suites 1 and 4, International Base,
       Greenwell Road, East Tullos, Aberdeen.

       Date:     4 August 1989 and 19 August 1989

       Parties:  Scarborough and Aberdeen Property Company Limited (1)
                 Thistle Well Services Limited (2)

6.     Lease of Unit 2, International Base, Greenwell Road, East Tullos,
       Aberdeen.

       Date:     24 May 1981 and 14 June 1981
       Parties:  Citygate Court Property Company Limited (1)
                 Thistle Well Services Limited (2)

7.     Office Suite 6, International Base, Greenwell Road, East Tullos,
       Aberdeen

       Date:     26 June 1992 and 6 July 1992

       Parties:  Citygate Court Property Company Limited (1)
                 Thistle Well Services Limited (2)





                                       78
<PAGE>   79
       LIST OF DOCUMENTS RELATING TO THE PROPERTIES TO BE DELIVERED TO THE
       BUYER AT CLOSING

(a)    UNIT 2, INTERNATIONAL BASE, GREENWELL ROAD, EAST TULLOS INDUSTRIAL
       ESTATE, ABERDEEN

1.     Extract registered Lease between Citygate Court Property Co Ltd and
       Thistle Well Services Ltd registered 12th July 1991.

2.     Extract registered Assignation by Thistle Well Services Ltd in favour of
       Coldeal Ltd registered 18th February 1993.

3.     Copy Sub-Lease between Thistle Well Services Ltd and Nodeco Ltd dated
       28th May and 22nd August 1996.

4.     Letter of Consent dated 14th May 1996 from Landlord to the sub-lease
       between Thistle Well Services Ltd and Nodeco Ltd, with Thistle Well
       Services Ltd's acceptance.

5.     Correspondence relating to installation of crane and testing chamber
       comprising letter from City of Aberdeen Planning Department dated 8th
       November 1989 and letter from Ashley Property Consultants dated 14th
       November 1989.

6.     Copy planning permission dated 7th June 1995 relating to construction of
       unit loading canopy over door opening.

7.     Copy planning permission dated 27th September 1995 relating to proposed
       toilets and changing room.

8.     Copy building warrant B95/1448.

9.     Copy building warrant B95/1449.





                                       79
<PAGE>   80
10.    Copy executed an Assignation by Thistle Well Services Ltd in favour of
       Nabors Drilling and Energy Services (UK) Ltd with consent of Citygate
       Court Property Co Ltd dated 16 September 1996 and 8 October 1996.

(b)    UNIT 6, INTERNATIONAL BASE, GREENWELL ROAD, EAST TULLOS INDUSTRIAL
       ESTATE, ABERDEEN

1.     Extract registered Lease between Citygate Court Property Co Ltd and
       Thistle Well Services Ltd, registered 10th August 1992,

2.     Extract registered Assignation by Thistle Well Services Ltd in favour of
       Coldeal Ltd, registered 18th February 1993.

3.     Copy offer of sub-lease by Paull & Williamsons on behalf of Nabors
       Drilling and Energy Services (UK) Ltd to Oil Tech Trading Ltd.

4.     Copy executed an Assignation by Thistle Well Services Ltd in favour of
       Nabors Drilling and Energy Services (UK) Ltd with consent of Citygate
       Court Property Co Ltd dated 16 September 1996 and 8 October 1996.

(c)    UNITS 7 & 8 AND OFFICE SUITES 1 & 4, INTERNATIONAL BASE, GREENWELL ROAD,
       EAST TULLOS INDUSTRIAL ESTATE, ABERDEEN

1.     Extract registered Lease between Scarborough & Aberdeen Property Co Ltd
       and Thistle Well Services Ltd registered 5th September 1989.

2.     Extract registered Minute of Agreement recording a review of rent
       between Citygate Court Property Co Ltd and Thistle Well Services Ltd
       registered 2Oth September 1991.





                                       80
<PAGE>   81
3.     Extract registered Assignation by Thistle Well Services Ltd in favour of
       Coldeal Ltd registered 18th February 1993.

4.     Copy building warrant B92/1589 with copy completion certificate dated
       14th July 1992 relating thereto (alterations to office suites 1 & 4).

5.     Letter of Consent from Ashley Property Consultants dated 7th December
       1988 re connecting door between Units 7 & 8.

6.     Copy letter dated 16th June 1992 from Citygate Court Property Co Ltd re
       minor alterations to office suite 1 June/July 1991.

7.     Coloured copy lease plan.

8.     Photocopy Schedule of Condition in respect of Unit 7 prepared by F.G.
       Burnett (undated).

9.     Copy executed an Assignation by Thistle Well Services Ltd in favour of
       Nabors Drilling and Energy Services (UK) Ltd with consent of Citygate
       Court Property Co Ltd dated 16 September 1996 and 8 October 1996.

(d)    OFFICE SUITE 6, INTERNATIONAL BASE, GREENWELL ROAD, EAST TULLOS
       INDUSTRIAL ESTATE, ABERDEEN

1.     Photocopy draft Lease between Citygate Court Property Co Ltd and Thistle
       Well Services Ltd.

2.     Copy missives of lease (four letters) dated 16th March 1992 and
       subsequent dates.





                                       81
<PAGE>   82
3.     Extract registered Assignation by Thistle Well Services Ltd in favour of
       Coldeal Ltd registered 18th February 1993.

4.     Letter from Citygate Court Property Co Ltd dated 27th March 1992 re
       formation of new doorway between office suites 4 & 6.

5.     Copy executed an Assignation by Thistle Well Services Ltd in favour of
       Nabors Drilling and Energy Services (UK) Ltd with consent of Citygate
       Court Property Co Ltd dated 16 September 1996 and 8 October 1996.

(e)    INTERNATIONAL BASE- MISCELLANEOUS

1.     Photocopy completion certificate dated 14th May 1990 re building warrant
       B89/2709 dated 22nd December 1989.

2.     Interim Reports on Search against Thistle Well Services Ltd number 74490
       from date of incorporation to 7th July 1992.

3.     Interim Reports on Search against Thistle Well Services Ltd from 29th
       June 1987 to 8th July 1992.

(f)    SITES 15 AND 23 PITMEDDEN ROAD INDUSTRIAL ESTATE, DYCE, ABERDEEN

1.     Photocopy extract registered Lease between the Grampian Regional Council
       and Kabell (Management & Development) Ltd recorded DGRS (Aberdeen) 18th
       August 1981 (Site 15).

2.     Photocopy extract registered Lease between the Grampian Regional Council
       and Kabell (Management & Development) Ltd recorded said DGRS 18th August
       1981 (Site 23).





                                       82
<PAGE>   83
3.     Photocopy completed Lease between Kabell (Management and Development)
       Ltd and Loffland Brothers North Sea Inc dated 21st October and 9th
       November 1981 (various areas of ground generally comprising Units 15 and
       Units 23) (two copies).

4.     Photocopy extract registered Minute of Agreement between Kabell
       (Management & Development) Ltd and Loffland Brothers North Sea Inc
       registered 2nd October 1984.

5.     Photocopy extract registered Minute of Agreement between the Governor
       and Company of the Bank of Scotland and Loffland Brothers North Sea Inc
       registered 16th June 1989.

6.     Photocopy Sub-Lease between Loffland Brothers North Sea Inc and Loffland
       Nabors UK Ltd dated 21st September 1990.

7.     Extract registered Minute of Agreement incorporating Assignation and
       Variation of Lease between Loffland Brothers North Sea Inc and Nabors
       Drilling & Energy Services UK Ltd and Albany Life Assurance Co Ltd
       registered 12th January 1996 (two extracts - one with formal intimation
       attached).

8.     Quick copy Disposition by Commissioner for John Gordon and Another with
       consents to John Mcintosh and Another recorded in the Sasines Register
       for the County of Aberdeen on 18th May 1921.

9.     Quick copy Deed of Servitude by Commissioner for John Gordon and Another
       to the County Council of the County of Aberdeen recorded said Register
       of Sasines 26th September 1925.

10.    Quick copy Disposition by Trustees of James Mcintosh to Robert Lawson &
       Sons (Dyce) Ltd recorded DGRS {Aberdeen) 5th April 1967.





                                       83
<PAGE>   84
11.    Quick copy Deed of Servitude containing Disposition by Trustees of James
       McIntosh to Robert Lawson & Sons (Dyce) Ltd registered DGRS (Aberdeen)
       9th May 1967.

12.    Quick copy Disposition by Trustees of James McIntosh to Robert Lawson &
       Sons (Dyce) Ltd registered DGRS 5th April 1967.

13.    Quick copy Disposition by Trustees of James McIntosh to Dee & Don River
       Purification Board registered DGRS (Aberdeen) 9th July 1969.

14.    Property enquiry certificate issued by City of Aberdeen District Council
       dated 29th January 1991 re Units 21 and 22 Kirkton Avenue, Pitmedden
       Industrial Estate, Aberdeen.

(g)    SITE 19 PITMEDDEN ROAD INDUSTRIAL ESTATE, DYCE, ABERDEEN

1.     Extract registered Lease between the Grampian Regional Council and
       Loffland Nabors UK Ltd recorded DGRS (Aberdeen) 6th March 1992.

(h)    SITES 21 AND 22 PITMEDDEN ROAD INDUSTRIAL ESTATE, DYCE, ABERDEEN

1.     Extract registered Lease between the Grampian Regional Council and
       Loffland Nabors U.K. Ltd recorded DGRS (Aberdeen) 10th February 1992.

2.     Miscellaneous prior titles re Site 21 Pitmedden Road Industrial Estate,
       Dyce, Aberdeen.

3.     Miscellaneous prior titles re Site 22 Pitmedden Road Industrial Estate,
       Dyce, Aberdeen.





                                       84
<PAGE>   85
                                   SCHEDULE 7
                                  TAX COVENANT

1.     INTERPRETATION

1.1    In this Schedule unless the context otherwise requires:-

       "Buyer's Relief"     means:

                            (a)    any Relief which arises in respect of, by
                                   reference to or in consequence of any income
                                   profits or gains earned, accrued or received
                                   after Closing and any Event occurring after
                                   Closing;

                            (b)    any Relief which is taken into account in
                                   computing and so reducing or eliminating any
                                   provision for deferred Taxation which
                                   appears in the Consolidated Working Capital
                                   (or which, but for such Relief, would have
                                   appeared in the Consolidated Working
                                   Capital); and

                            (c)    any Relief which is treated as an asset in
                                   the Consolidated Working Capital;

       "Claim for Taxation" means any assessment, notice, demand, letter or
                            other document issued by or action taken by or on
                            behalf of any Taxation Authority or any
                            circumstances indicating that the Company or any of
                            its Subsidiaries is or may be placed or is





                                       85
<PAGE>   86
                            sought to be placed under a Liability for Taxation;

       "Event"              means any event, act, failure, omission (including
                            the failure to make sufficient distributions to
                            avoid an apportionment or deemed distribution of
                            income), transaction (including the sale of the
                            Shares pursuant to this Agreement), or change in
                            residence, whether or not the Company or any of its
                            Subsidiaries was a party thereto;

       "Liability for
       Taxation"            means:

                            (a)    any liability (including a liability which
                                   is a primary liability of some other person
                                   and whether or not there is a right of
                                   recovery against another person) to make an
                                   actual payment or increased payment of
                                   Taxation;

                            (b)    any liability (including a liability which
                                   is a primary liability of some other person
                                   and whether or not there is a right of
                                   recovery against another person) to make a
                                   payment or increased payment of Taxation
                                   which would have arisen but for being
                                   satisfied, avoided or reduced by any Buyer's
                                   Relief; and

                            (c)    the disallowance, loss, clawback, reduction,
                                   restriction or modification of





                                       86
<PAGE>   87
                                   any Buyer's Relief within paragraph (b) or
                                   (c) of the definition of Buyer's Relief;

       "Relief"             includes any relief, saving, allowance, deduction,
                            exemption or set-off relevant to the computation of
                            any Liability for Taxation, any credit against
                            Taxation or any right to a repayment of Taxation;

       "Taxation"           includes (without limitation):

                            (a)    within the United Kingdom advance
                                   corporation tax, capital gains tax,
                                   corporation tax, customs and excise duties,
                                   income tax (including PAYE), inheritance
                                   tax, insurance premium tax, national
                                   insurance contributions, petroleum revenue
                                   tax, rates and community charge, stamp duty,
                                   stamp duty reserve tax and VAT;

                            (b)    outside the United Kingdom (and in
                                   particular in the United States of America),
                                   all taxes on gross or net income, profits or
                                   gains and taxes on receipts, sales, use,
                                   occupation, franchise, value added and
                                   personal property;

                            (c)    all former taxes and all other levies,
                                   imposts, duties, charges or withholdings in
                                   the nature of taxes imposed by any Taxation
                                   Authority;





                                       87
<PAGE>   88
                            (d)    any payment which the Company or any of its
                                   Subsidiaries may be or become bound to make
                                   to any person in respect of any taxation or
                                   as a result of any enactment relating to any
                                   taxation and any obligation to repay any
                                   payment received for group relief,
                                   surrenders of advance corporation tax or
                                   refunds of taxation; and

                            (e)    all interest, penalties, fines and other
                                   charges arising out of the above or to a
                                   failure to make any return or supply any
                                   information in connection with any of the
                                   above;

       "Taxation Authority" means the Inland Revenue, HM Customs & Excise, the
                            Department of Social Security and any other body
                            having functions in relation to the administration
                            and collection of Taxation whether in the United
                            Kingdom or elsewhere.

1.2    In interpreting this Schedule:

       1.2.1  words and expressions defined elsewhere in this Agreement shall
              have the same meanings in this Schedule except where otherwise
              provided or expressly defined in this Schedule and, unless the
              context otherwise requires, Section 1.3 of this Agreement shall
              apply to the interpretation of this Schedule;

       1.2.2  any reference to income, profits or gains earned, accrued or
              received or an Event which has occurred includes income,





                                       88
<PAGE>   89
              profits or gains deemed to have been or treated as or regarded as
              earned, accrued or received or an Event deemed to have or treated
              as having or regarded as having occurred, as the case may be.

2.     COVENANT TO PAY

The Seller covenants with the Buyer to pay to the Buyer an amount equal to:

2.1    any Liability for Taxation of the Company or any of its Subsidiaries in
       respect of, by reference to or in consequence of:

       2.1.1  any income, profits or gains earned, accrued or received on or
              before Closing; or

       2.1.2  any Event which occurred on or before Closing;

2.2    any Liability for Taxation of the Company or any of its Subsidiaries
       under sections 190 and 191 TCGA, section 132 Finance Act 1988, section
       214 ICTA or section 96(8) Finance Act 1990 which would not have arisen
       but for any act or omission of any company (other than (i) any Company
       which at the time the Liability for Taxation arises is an Affiliate of
       the Buyer or (ii) the Company or any of its Subsidiaries) which was at
       any time before Closing a member of the same group of companies as the
       Company or any of its Subsidiaries for any Taxation purposes;

2.3    any Liability for Taxation of the Company or any of its Subsidiaries
       under section 767A ICTA by reason of corporation tax assessed on any
       company (other than (i) any Company which at the time the Liability for
       Taxation arises is an Affiliate of the Buyer or (ii) the Company or any
       of its Subsidiaries) and remaining unpaid where the company in question
       is or was under the control of any person who has at any time prior to





                                       89
<PAGE>   90
       Closing had control of the Company or any of its Subsidiaries (within
       the meaning in section 767B(4) ICTA);

2.4    any Liability for Taxation of the company or any of its Subsidiaries
       arising as a result of the transfer of the Excluded Assets prior to
       Closing pursuant to clause 5.6 of the Agreement;

2.5    any Liability for Taxation of the Company or any of its Subsidiaries
       arising in respect of any operations carried on in the United States of
       America prior to Closing;

2.6    any costs reasonably and properly incurred by the Company or any of its
       Subsidiaries in connection with any liability falling within 2.1 to 2.5
       above.

3.     EXCLUSIONS

The Covenant contained in paragraph 2 shall not apply and the Buyer shall have
no claim against the Seller under it to the extent that:

3.1    provision or reserve in respect of the liability in question is made in
       the Financial Statements or that payment or discharge of such liability
       has been taken into account therein or in determining the amount of the
       Consolidated Working Capital;

3.2    the Buyer has recovered damages from the Seller for breach of any of the
       Warranties in respect of the same liability or otherwise pursuant to the
       Agreement;

3.3    the liability in question arises as a result of a change in rates of
       Taxation or a change in legislation relating to Taxation or a change in
       any extra statutory concession or the published practice of any





                                       90
<PAGE>   91
       Taxation Authority, made, in each case, after Closing and with
       retrospective effect;

3.4    the claim would result in the maximum aggregate liability of the Seller
       set out in Clause 8.1 (Liability under Representatives and Warranties)
       of this Agreement being exceeded;

3.5    the claim is made outside the time limit contained in Clause 8.4 of this
       Agreement;

3.6    such claim would not have arisen but for a change in the treatment of
       assets and liabilities or of the Taxation attributable to timing
       differences (including capital allowances) in future accounts of the
       Target Group or but for any other change in the accounting bases upon
       which the Target Group prepares its future accounts except to the extent
       necessary to rectify any non-compliance with GAAP as at the date of this
       Agreement;

3.7    such claim would not have arisen but for an omission, act or transaction
       (other than an omission, act or transaction carried out pursuant to a
       legally binding obligation created on or before Closing) occurring after
       Closing otherwise than in the Ordinary Course of Business which the
       Buyer knew or ought reasonably to have known would give rise to the
       liability in question;

3.8    such claim would not have arisen or would have been reduced or
       eliminated but for a failure on the part of any member of the Target
       Group to make any claim, election, surrender or disclaimer or give any
       notice or consent or do any other thing after Closing the making, giving
       or doing of which was taken into account in preparing the Financial
       Statements or determining the Consolidated Working Capital and which was
       reasonably apparent from the face thereof;





                                       91
<PAGE>   92
3.9    to the extent that the claim or breach would not have arisen but for
       some act, omission, transaction or arrangement whatsoever carried out at
       the written request of the Buyer prior to Closing;

4.     AMOUNT OF LIABILITY FOR TAXATION

The amount of any Liability for Taxation shall be as follows:

4.1    to the extent that a Liability for Taxation involves a liability of the
       Company or any of its Subsidiaries to make an actual payment or
       increased payment of Taxation, the amount of such payment or increased
       payment;

4.2    to the extent that a Liability for Taxation involves a liability of the
       Company or any of its Subsidiaries to make a payment or increased
       payment of Taxation which would have arisen but for being satisfied,
       avoided or reduced by any Buyer's Relief, the amount of Taxation which
       the Buyer's Relief in fact saves;

4.3    to the extent that a Liability for Taxation involves the disallowance,
       loss, clawback, reduction, restriction or modification of any Buyer's
       Relief (other than a right to a repayment of Taxation) which has been
       taken into account in the Consolidated Working Capital, the amount by
       which the working capital of the Company or its Subsidiaries as shown in
       the Consolidated Working Capital Statement would have been reduced but
       for the presumed availability of the Buyer's Relief; and

4.4    to the extent that a Liability for Taxation involves the disallowance or
       reduction by any Taxation Authority of a right to a repayment of
       Taxation, the amount of the repayment so disallowed or lost.





                                       92
<PAGE>   93
5.     TIME FOR PAYMENT

5.1    Any amount which the Seller is obliged to pay to the Buyer under this
       Schedule shall be paid in cleared funds on or before the following dates
       (or, if later, the fifth Business Day after the Buyer notifies the
       Seller of the relevant Claim in accordance with paragraph 6.1):

       5.1.1  in the case of a Liability for Taxation which involves a
              liability of the Company or any of its Subsidiaries to make an
              actual payment or increased payment of Taxation, the fifth
              Business Day prior to the date on which the Taxation is due and
              payable to the relevant Taxation Authority;

       5.1.2  in the case of a Liability for Taxation which involves a
              liability of the Company or any of its Subsidiaries to make a
              payment or increased payment of Taxation which would have arisen
              but for being satisfied, avoided or reduced by the use by the
              Company or any of its Subsidiaries of any Buyer's Relief, the
              fifth Business Day prior to the date on which the Taxation would
              have been payable to the relevant Taxation Authority;

       5.1.3  in the case of a Liability for Taxation which involves the
              disallowance or reduction by any Taxation Authority of a right to
              repayment of Taxation, the fifth Business Day after the date on
              which such repayment of Taxation would otherwise have been due to
              be made by such Taxation Authority; and

       5.1.4  in any other case, the fifth Business Day after service by the
              Buyer to the Seller of a written demand for payment.

5.2    If any amount payable by the Seller to the Buyer under this Schedule is
       not paid on or before the due date for payment, that sum shall carry





                                       93
<PAGE>   94
       interest at the rate of 2 per cent above the base lending rate of
       National Westminster Bank plc from the due date until payment.

6.     CONDUCT OF CLAIMS

6.1    If the Buyer becomes aware of any Claim for Taxation which could give
       rise to a claim being made by the Buyer under this Schedule or the
       warranties contained in Clause 9 of Schedule 8 of the Agreement it shall
       notify the Seller as soon as reasonably practicable.

6.2    The Buyer agrees (if the Seller indemnifies and secures the Buyer and
       the Company or any of its Subsidiaries to the reasonable satisfaction of
       the Buyer against any loss, liability, costs or damages which may
       thereby be incurred including the Taxation the subject matter of the
       Claim) to take and procure that the Company or any of its Subsidiaries
       shall take such action and give such information and assistance as the
       Seller may reasonably request to resist, appeal or compromise any Claim
       for Taxation notified to the Seller in accordance with paragraph 6.1.

6.3    The action which the Seller may request under paragraph 6.2 shall
       include the Buyer or the Company or any of its Subsidiaries applying to
       postpone (so far as legally possible) the payment of any Taxation and
       allowing professional advisers nominated by the Seller (subject to
       approval by the Buyer, such approval not to be unreasonably withheld or
       delayed) to take over at the Seller's own expense the conduct of all
       negotiations and proceedings in connection with the Claim for Taxation.

6.4    The Seller shall keep the Buyer fully informed as to any action taken or
       postponed to be taken in conjunction with the conduct of all
       negotiations and proceedings of whatever nature arising in connection
       with the such dispute and all other relevant matters and shall supply to





                                       94
<PAGE>   95
       the Buyer in advance copies of all returns and communications proposed
       to be made to any Taxation Authority.

7.     RELIEFS

7.1    If the auditors for the time being of the Company or its Subsidiaries
       shall determine (at the request and expense of the Seller) that any
       Liability for Taxation which has resulted in a payment having been made
       by the Seller under this Schedule or the Warranties contained in Clause
       9 of Schedule 8 of the Agreement has given rise to a Relief for the
       Company, any of its Subsidiaries or the buyer which would not otherwise
       have arisen or subject to Clause 8.2 that the provision for Taxation in
       the Consolidated Working Capital Statement was an overprovision, then,
       as and when the liability of the Company, its Subsidiaries or the Buyer
       to make an actual payment of or in respect of Taxation is reduced by
       reason of that Relief or a payment is received in respect of a Relief
       (after taking account of the effect of all other Reliefs that are or
       become available to the Company, its Subsidiaries or the Buyer including
       any Relief derived from a subsequent accounting period) from the amount
       that that liability would have been but for the availability of that
       Relief, (or in the case of an overprovision forthwith upon the
       determination of the auditors) the amount by which that liability is so
       reduced or the amount of the payment or the amount of the overprovision
       shall be dealt with in accordance with paragraph 7.3.

7.2    The amount of the overprovision shall be calculated on the basis that no
       overprovision may arise or be increased by:-

       7.2.1  a retrospective change in the law of Taxation announced after
              Closing;

       7.2.2  any Relief arising after Closing; or





                                       95
<PAGE>   96
       7.2.3  any act of the Buyer or the Company carried out after Closing
              except if any of clause 3.7, clause 3.8, or clause 3.9 hereof are
              applicable.

7.4    Where it is provided under paragraph 8.1 that any amount (the "Relevant
       Amount") is to be dealt with in accordance with this paragraph:-

       7.4.1  the Relevant Amount shall first be set off against any payment
              then due from the Seller under this Schedule or under the
              Agreement in respect of the Warranties contained in clause 9 of
              Schedule 8 of the Agreement; and

       7.4.2  to the extent there is an excess of the Relevant Amount over any
              payment referred to in clause 7.4.1 hereof, a refund shall be
              made to the Seller of any previous payment or payments made by
              the Seller under this Schedule or under the Agreement in respect
              of the Warranties contained in clause 9 of Schedule 8 of the
              Agreement and not previously refunded under this paragraph up to
              the amount of such excess; and

       7.4.3  to the extent that the excess referred to in paragraph 7.4.2 is
              not exhausted under that paragraph, except in the case of an
              overprovision the remainder of that excess shall be carried
              forward and set off against any future payment or payments which
              become due from the Seller under this Schedule or under the
              Agreement in respect of the Warranties contained in clause 9 of
              Schedule 8 of the Agreement and in the case of an overprovision
              the amount of the excess shall be paid to the Seller forthwith.





                                       96
<PAGE>   97
7.4    The Buyer shall use its reasonable endeavours to procure that the
       auditors make a timely determination when requested to do so by the
       Seller for the purposes of paragraph 7.1 hereof.

7.5    For the avoidance of doubt, the amount of any overprovision shall
       include not only the amount of any provision for Taxation in the
       Consolidated Working Capital to the extent the same is determined to
       have been an overprovision, but also the amount of any Tax Refund of any
       Company arising as a result of any Event on or before Closing, to the
       extent the same was not reflected in the Consolidated Working Capital or
       exceeds the amount of any Tax Refund reflected in the Consolidated
       Working Capital other than any Tax Refund received in connection with
       the litigation referred to in Section 6.2 of the Agreement.  Where the
       auditors determine no Tax Refund has been received or that a Tax Refund
       has been received and in either case the amount is less than that
       provided in the Consolidated Working Capital, the amount of such
       shortfall shall be treated as reducing any overprovision for Taxation.





                                       97
<PAGE>   98
8.     CLAIMS AGAINST THIRD PARTIES

8.1    Where the Seller has made a payment under this Schedule or the
       Warranties contained in clause 9 of Schedule 8 of the Agreement and the
       Company or any of the Subsidiaries is entitled to recover from any third
       party (including a Taxation Authority but excluding the Buyer, the
       Company or any of the Subsidiaries) any sum in respect of the matter to
       which the payment made by the Seller relates (including recoveries by
       way of discount, credit or set-off), the Buyer shall or shall procure
       that the Company or any of its Subsidiaries shall (at the request and
       expense of the Seller and upon the Seller indemnifying and securing the
       Buyer, the Company and its Subsidiaries against all costs or expenses
       which may thereby be incurred) subject to paragraph 8.3, take such
       action as the Seller may reasonably request to enforce such recovery
       against the person in question.

8.2    The Buyer shall account to the Seller for any sums recovered in
       accordance with paragraph 8.1 (including any interest or repayment
       supplement paid by such a person) net of Taxation (if any) on such sum
       and after deduction of any costs or expenses reasonably incurred by the
       Buyer, the Company or any of its Subsidiaries in recovering such sum,
       provided that the amount paid by the Buyer under this paragraph
       (excluding interest or repayment supplement) shall not exceed the amount
       paid by the Seller in respect of the relevant claim under Warranties
       contained in clause 9 of Schedule 8 of the Agreement.





                                       98
<PAGE>   99
9.     TAXATION ON PAYMENTS BY SELLER

9.1    All payments by the Seller under this Schedule shall be made in full
       without any deduction or withholding (whether in respect of Taxation,
       set-off, counter claim or otherwise) unless the deduction or withholding
       is required by law, in which case the Seller shall forthwith pay to the
       Buyer such additional amount as will ensure that the Buyer receives a
       net amount equal to the full amount which it would have received but for
       such deduction or withholding.  The Buyer shall account to the Seller
       for the benefit of any credit obtained by the Buyer in respect of the
       deduction or withholding.

9.2    If any payment received by the Buyer under this Schedule is subject to
       Taxation, the Seller shall pay to the Buyer such additional amount
       (after taking into account any Taxation payable in respect of such
       additional amount) as will ensure that the Buyer receives a net amount
       equal to the full amount which it would have received had the payment
       not been subject to Taxation.

9.3    The provisions of paragraph 9 shall not apply to interest payable under
       paragraph 5.2





                                       99
<PAGE>   100
10.    ASSIGNMENT

The benefit of the provisions of this Schedule 10 shall not be assigned by the
Buyer.

11.    BUYER'S INDEMNITY

11.1   The Buyer agrees to indemnify the Seller against any liability which the
       Seller may incur under section 767A and section 767B ICTA as a result of
       a failure by the Company or any of the Subsidiaries to discharge any
       liability for Taxation for which provision has been made in the
       Consolidated Working Capital Statement (for itself and as agent for any
       company controlled by the Seller).

11.2   The Seller shall use any amount paid by the Buyer pursuant to clause
       11.1 to discharge the liability for Taxation which has given rise to the
       Claim.





                                      100
<PAGE>   101
                                   SCHEDULE 8
                                   WARRANTIES

1.     ORGANIZATION, QUALIFICATION, AND CORPORATE POWER

Each of the Company and its Subsidiaries is a company duly organized and
validly existing under the laws of the jurisdiction of its incorporation.  Each
of the Company and its Subsidiaries is duly authorised to conduct business in
the United Kingdom.  Each of the Company and its subsidiaries is duly
authorised under the laws of each jurisdiction where such qualification is
required, except where the lack of such qualification would not have a material
adverse effect on the financial condition of the Company and its Subsidiaries
taken as a whole. Each of the Company and its Subsidiaries has full corporate
power and authority to carry on the businesses in which it is engaged and to
own and use the properties owned and used by it.  Schedule 1 lists the
directors and secretary of each of the Company and its Subsidiaries.

2.     CAPITALIZATION

The Seller owns the entire legal and beneficial interest in the Company Shares
free and clear of Encumbrances. The Company Shares constitute the whole of the
Company's allotted and issued share capital and are fully paid or credited as
fully paid.  There are no outstanding or authorised options, warrants, purchase
rights, subscription rights, conversion rights, exchange rights, or other
contracts or commitments that could require the Company or any of the
Subsidiaries to issue, sell, or otherwise cause to become outstanding any of
its share capital.  There is no Encumbrance on, over or affecting any of the
Company Shares or any unissued shares, debentures or other securities of any
member of the Target Group and no person has, or has claimed, the right
(whether exercisable now or in the future and whether contingent or not) to
call for the issue or transfer of any shares, debentures or other securities of
any member of the Target Group.





                                      101
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3.     NONCONTRAVENTION

Neither the execution and the delivery of this Agreement, nor any of the
Ancillary Documents nor the consummation of the transactions contemplated
hereby, will (i) violate any constitution, statute, regulation, rule,
injunction, judgment, order, decree, ruling, charge, or other restriction of
any government, governmental agency, or court to which any of the Company and
its Subsidiaries is subject or (ii) violate any provision of the Memorandum or
Articles of Association of any of the Company and its Subsidiaries or (iii)
conflict with, result in a breach of, constitute a default under, result in the
acceleration of, create in any party the right to accelerate, terminate,
modify, or cancel, or require any notice under any agreement, contract, lease,
license, instrument, or other arrangement to which any of the Company and its
Subsidiaries is a party or by which it is bound or to which any of their
respective assets is subject (or result in the imposition of any Encumbrance
upon any of their respective assets) or (iv) of itself result in the creation
of an Encumbrance on any of the assets of the Target Group; or (v) of itself
result in any member of the Target Group losing the benefit of any Licence.
None of the Company and its Subsidiaries needs to give any notice to, make any
filing with, or obtain any authorisation, consent, or approval of any
government or governmental agency in order for the Parties to consummate the
transactions contemplated by this Agreement.

4.     BROKERS' FEES

None of the Company and its Subsidiaries has any liability or obligation to pay
any fees or commissions to any broker, finder, or agent with respect to the
transactions contemplated by this Agreement.





                                      102
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5.     ASSETS AND STOCK

5.1    All assets included in the Financial Statements or acquired by the
       Company or its Subsidiaries since the Accounts Date and all assets owned
       by the Company and each Subsidiary are:-

       (i)    legally and beneficially owned by the Target Group free from any
              Encumbrance;

       (ii)   in the possession or under the exclusive control of the Target
              Group; and

       (iii)  where subject to a requirement for a Licence, duly licensed or
              registered in the sole name of a member of the Target Group.

5.2    The Asset register marked "A" attached to the Disclosure Letter
       comprises a record which is true, complete and accurate as to the plant,
       machinery, equipment and vehicles owned by or leased to each member of
       the Target Group and actively used in the performance of its business.

5.3    All equipment (other than the Drill Pipe and Instrumentation, in respect
       of which no such warranty is given) owned by or leased to the Target
       Group or parties to the Contracts (other than the Target Group) which is
       located on the relevant platforms on which services are being provided
       pursuant to the Contracts at the date of this Agreement and which is
       required for the performance of such services has been maintained in
       accordance with good oilfield practice.

5.4    No member of the Target Group is a party to a lease or hire, agreement
       in respect of the assets listed in the asset register marked "A"
       attached to the Disclosure Letter, nor party to any such agreement in
       respect of any other assets under which there is an obligation to make
       an annual payment in excess of Pound Sterling 50,000 or a hire purchase,
       credit





                                      103
<PAGE>   104
       sale or conditional sale agreement, under which there is an outstanding
       obligation to make payments in excess of Pound Sterling 50,000.

5.5    No member of the Target Group has purchased any raw materials or
       finished products on terms that title thereto does not pass until full
       payment is made.

6.     SUBSIDIARIES

6.1    Schedule 1 sets forth for the Company and each Subsidiary as a true and
       complete record of (i) its name and registered office, (ii) its
       authorised and issued share capital of each class, and (iii) the names
       of the registered holders of the issued shares and the number of shares
       held by each such holder.  All of the shares of the Company and each
       Subsidiary have been duly authorised, validly issued and are fully paid.
       Neither the Company nor any Subsidiary currently holds or has at any
       time held any shares or any interest therein in any other company (save
       for the Company's holding of shares in the Subsidiaries).

6.2    TWSL is and has been since the Accounts Date dormant as defined in
       Section 250(3) of the Act.





                                      104
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7.     FINANCIAL STATEMENTS

7.1    Attached to the Disclosure Letter are the Financial Statements and the
       Most Recent Financial Statements.  The Financial Statements (including
       the notes thereto) and the Most Recent Financial Statements have been
       prepared in accordance with GAAP applied on a consistent basis
       throughout the period covered thereby and present a true and fair view
       of the financial condition of the Company and its Subsidiaries as of
       such dates and the results of the operation of the Company and its
       Subsidiaries for such periods PROVIDED, HOWEVER, that the Most Recent
       Financial Statements are subject to normal year-end adjustments and lack
       footnotes and other presentation items and do not include any income,
       expenditure or capital sum referable to the U.S. branch assets as
       described in Schedule 5.

7.2    The Financial Statements have been prepared on a basis and using
       accounting conventions, standards, principles and practices which are
       consistent in all material respects for the three financial years ended
       on the Accounts Date.

7.3    The Company's and its Subsidiaries' accounting reference date is as set
       out in Schedule 1 and has not at any time in the 3 years prior to the
       Accounts Date been any other date.

7.4    Since the Accounts Date:

       (i)    the business of Target Group has been carried on in the ordinary
              and usual course so as to maintain the business as a going
              concern;

       (ii)   no distributions within the meaning of Part VIII of the Act or of
              ICTA have been declared paid or made by any member of the Target
              Group except as provided in the Accounts;





                                      105
<PAGE>   106
       (iii)  no share or loan capital of any Target Group has been or agreed
              to be issued allotted redeemed purchased or repaid by any member
              of the Target Group;

       (iv)   no asset with a book value in excess of Pound Sterling 50,000 
              (nor assets with an aggregate book value in excess of Pound
              Sterling 500,000) have been acquired or disposed of by any member
              of the Target Group except for current assets in the ordinary and
              usual course of trading;
        
       (v)    no contract, arrangement or transaction has been entered into and
              no payment has been made by any member of the Target Group
              otherwise than in the Ordinary Course of Business and on entirely
              arm's length terms;

       (vi)   no single item of capital expenditure has been or agreed to be
              incurred and no single commitment of a capital nature has been or
              agreed to be entered into exceeding Pound Sterling 50,000 (nor 
              capital expenditure or commitments of a capital nature in an
              aggregate amount of Pound Sterling 500,000) in total by any
              member of the Target Group;
        
       (vii)  no resolution of the shareholders of any member of the Target
              Group has been passed;

       (viii) to the Knowledge of the Seller, there has not been any material
              adverse change in the financial condition of the Company and its
              Subsidiaries taken as a whole.

7.5    Each member of the Target Group's accounts, books, ledgers, financial
       and other records are in its possession or under its control, up





                                      106
<PAGE>   107
       to date and contain a record of all matters required to be entered  in
       them by the Act, GAAP and other relevant legislation.

8.     LEGAL COMPLIANCE

8.1    To the Knowledge of the Seller, each of the Company and its Subsidiaries
       has complied with all applicable laws (including rules, regulations,
       codes, plans, injunctions, judgments, orders, decrees, rulings, and
       charges thereunder).

8.2    Neither the Seller nor any member of the Target Group has received
       written notice of any current, pending or threatened governmental,
       regulatory or other investigation, enquiry or disciplinary action
       regarding any member of the Target Group.

8.3    To the Knowledge of the Seller, each member of the Target Group has all
       necessary Licences for the proper carrying on of its business in the
       United Kingdom and each Licence is valid, in force and unconditional or
       subject only to a condition that has been fulfilled and under which no
       further action is required.

8.4    All returns, particulars, resolutions and other documents required to be
       delivered to the Registrar of Companies by each member of the Target
       Group have been properly prepared and delivered.

8.5    The copy of the memorandum and articles of association of the Target
       Group attached to the Disclosure Letter is true, complete, accurate and
       up-to-date and includes copies of all resolutions or agreements required
       by law to be annexed to it and each register, minute book and other book
       required to be kept by the Act has been properly kept, is up-to-date and
       contains a true, accurate and complete record of the matters which
       should be dealt with in those books and no notice or





                                      107
<PAGE>   108
       allegation that any of them is incorrect or should be rectified has been
       received.

8.6    Due compliance has been made with the provisions of the Act and other
       legal requirements in connection with the formation of each member of
       the Target Group, the allotment and issue, purchase and redemption of
       shares, debentures or other securities of the Target Group, the payment
       of dividends, any reduction of share capital and no notice or allegation
       has been received that any of the foregoing is incorrect of should be
       rectified.

8.7    No member of the Target Group has received notice that any of the
       Licences necessary for the operation of their respective businesses has
       been or will be cancelled or not renewed.

9.     TAX MATTERS

9.1    Each of the Company and its Subsidiaries has filed all Tax returns that
       it was required to file, and has paid all Tax shown thereon as owing,
       except where the failure to file Tax returns or to pay Tax would not
       have a material adverse effect on the financial condition of the Company
       and its Subsidiaries taken as a whole.

9.2    The Disclosure Letter lists all Tax returns filed with respect to any of
       the Company and its Subsidiaries for taxable periods ended on or after
       31 December 1990, and indicates those Tax returns that have been subject
       to Inland Revenue enquiry and indicates those Tax returns that are
       currently subject to audit.

9.3    None of the Company and its Subsidiaries has waived any statute of
       limitations in respect of taxes or agreed to any extension of time with
       respect to an Tax assessment or deficiency except as noted in the
       Disclosure Letter.





                                      108
<PAGE>   109
9.4    None of the Company and its Subsidiaries is a party to any Tax
       allocation or sharing agreement.

10.    REAL PROPERTY

10.1   To the Seller's Knowledge all members of the Target Group have obtained
       planning permission in terms of the Planning Acts and all necessary
       consents and warrants required under the Buildings Regulations with
       respect to any development of an alteration or addition to the
       Properties carried out by such member.

10.2   With regard to any property held on lease by any member of the Target
       Group and forming part of the Properties true, accurate and complete
       copies of each relevant lease of any such property to any such member
       have been supplied to the Buyer each such lease is valid and subsisting
       and no member of the Target Group has received notice of any dispute or
       claim outstanding thereunder.

10.3   No member of the Target Group has contracted to purchase or lease any
       property for future settlement nor has any such member contracted or
       agreed to dispose of or in any way alienate any of the Properties.

10.4   The Properties are held subject to and with the benefit of the tenancies
       (which expression includes sub-tenancies and sub-under tenancies) as set
       out in Part 2 of the Schedule 6 and none others.

10.5   With respect to such tenancies referred to in paragraph 10.4:

       10.5.1 true, accurate and complete copies of each relevant tenancy of
              any such property by all members of the Target Group have been
              supplied to the Buyer such tenancy is valid and subsisting,





                                      109
<PAGE>   110
              no member of the Target Group has received notice of any dispute
              or claims outstanding thereunder;

       10.5.2 the relevant member of the Target Group has observed and
              performed the covenants on the part of the landlord thereunder.

10.6   No member of the Target Group has in relation to the Properties been
       served with any notices at the instance of the Local Authority as
       environmental health authority or other official regulatory body or
       authority in respect of any breach of legislation, regulations, codes of
       practice, circulars or guidance notes made thereunder relating to:
       waste; contaminated land; discharges to land, ground and surface water
       and sewers; emissions to air; noise; dangerous, hazardous or toxic
       substances of materials;  nuisance; health and safety.

11.    MATERIAL CONTRACTS

11.1   Attached to the Disclosure Letter are true, accurate and complete copies
       of the Contracts and any amendments thereto which comprise all of the
       contractual terms and material written arrangements and understandings
       (whether or not legally binding) between the parties to the Contracts.

11.2   There are no drilling contracts or other material written arrangements
       or understandings in relation to drilling (whether or not legally
       binding) to which any member of the Target Group is a party other than
       the Contracts.

11.3   No member of the Target Group is a party to, or subject to, any
       contract, or material written arrangement or understanding (whether or
       not legally binding) the performance or discharge of which could involve
       consideration or payment in excess of Pound Sterling 50,000 and which:-





                                      110
<PAGE>   111
       11.3.1 is long term (ie. not terminable on 90 days' notice or less
              without payment of compensation or damages);

       11.3.2 is not wholly on an arm's length basis in the Ordinary Course of
              Business;

       11.3.3 expressly restricts its freedom to carry on its business in any
              part of the world in such manner as it thinks fit;

       11.3.4 is an outstanding offer, tender, proposal, estimate or quotation
              which, if accepted or incorporated into a contract would
              constitute a contract which, if now in existence, would fall
              within any of paragraphs 11.2 or 11.3 and which would account for
              more than 5% of the turnover for 1996 as shown in the Most Recent
              Financial Statements;

       11.3.5 is a distributorship, agency or management agreement or
              arrangement;

       11.3.6 accounted for more than 5% of the Target Group's turnover in the
              period since the Accounts Date as shown by the Most Recent
              Financial Statements.

11.4   Save as disclosed in the Financial Statements, there is not outstanding
       any guarantee, indemnity or suretyship given by or for the benefit of
       any member of the Target Group.

11.5   To the Knowledge of the Seller no Contract has been terminated and no
       notice of termination or intention to terminate has been served by or on
       any member of the Target Group in respect of any of the Contracts.

11.6   There will at Closing be no outstanding obligations and no continuing
       contracts or arrangements between any member of the Retained Group





                                      111
<PAGE>   112
       and the Target Group except as contemplated by this Agreement or any of
       the Ancillary Documents.

12.    POWERS OF ATTORNEY

There are no outstanding powers of attorney executed on behalf of any of the
Company and its Subsidiaries.

13.    LITIGATION

The Disclosure Letter sets forth each instance in which any of the Company and
its Subsidiaries (i) is subject to any outstanding injunction, judgment, order,
decree, ruling, or charge or (ii) is a party to any action, suit, proceeding,
hearing, or investigation of, in, or before any court or quasi-judicial or
administrative agency of any local, or foreign jurisdiction and to the Seller's
Knowledge no such action, suit, proceeding, hearing or investigation is pending
by or against any member of the Target Group.

14.    JOINT VENTURE

No member of the Target Group is or has agreed to become a member of any
partnership or other unincorporated association, joint venture, European
Economic Interest Grouping or consortium (other than a recognised trade
association) or other profit or income sharing arrangement.

15.    BRANCH

No member of the Target Group has any branch, agency or place of business
outside the United Kingdom and does not use its letterhead, books or vehicles
or otherwise carry on its business under any name other than its corporate
name.





                                      112
<PAGE>   113
16.    ACCURACY OF SCHEDULES

The contents of Schedules 1, 3, 4, 5, 6 and 10 are true and accurate.

17.    COMPETITION AND FAIR TRADING

17.1   No member of the Target Group has given or been requested to give an
       undertaking or written assurance (legally binding or not) to any court
       or a governmental authority or an authority of the European Communities
       or European Economic Area under the RTPA, Fair Trading Act 1973,
       Competition Act 1980, Resale Prices Act 1976, Treaty of Rome, Agreement
       on the European Economic Area or other statute or legal instrument of
       the United Kingdom or other jurisdiction.  To the Seller's Knowledge, no
       member of the Target Group is affected by an order or regulation made
       under the Fair Trading Act 1973 or Competition Act 1980 or the
       competition law of another jurisdiction or by a decision of the
       Commission of the European Communities or EFTA Surveillance Authority or
       a competition authority of another jurisdiction.

17.2   To the Seller's Knowledge, no member of the Target Group has received a
       communication or request for information relating to any aspect of the
       Target Group's business from or by the Director General of Fair Trading,
       Monopolies and Mergers Commission, Secretary of State for Trade and
       Industry, Commission of the European Communities or EFTA Surveillance
       Authority or competition or governmental authority of another
       jurisdiction.  No agreement, arrangement or conduct (by omission or
       otherwise) of any member of the Target Group has been the subject of an
       investigation, report or decision by any of those persons or bodies.





                                      113
<PAGE>   114
17.3   No member of the Target Group has received any grant or subsidy which
       would be repayable as a result of the sale of the Company Shares to the
       Buyer.

18.    INSOLVENCY

18.1   In relation to each member of the Target Group:-

       18.1.1 no resolution has been passed (and no meeting has been convened,
              and no written resolution has been circulated with a view to any
              resolution), no petition has been presented and no order has been
              made for administration or winding up or for the appointment of a
              receiver or provisional liquidator;

       18.1.2 no procedure has been commenced, by the Registrar of Companies or
              any other person, with a view to striking off under section 652
              of the Act;

       18.1.3 no receiver has been appointed, no Encumbrance has been enforced,
              and no floating charge has crystallised on or over any of its
              assets, and no event has occurred or will occur by virtue of the
              execution and performance of this Agreement or the Ancillary
              Documents and the other agreements and documents referred to in
              it which would cause, or entitle any person to cause, any of
              these things to happen;

       18.1.4 it has not stopped paying its creditors, is not insolvent, and is
              not unable to pay its debts for the purposes of section 123 of
              the Insolvency Act 1986;

       18.1.5 there is no unsatisfied judgement or order of any court or
              tribunal, or award of any arbitrator, against it;





                                      114
<PAGE>   115
       18.1.6 no distress, execution or other process has been levied against
              any of its assets;

       18.1.7 no meeting of its creditors, or any class of them, has been held
              or summoned, no proposal has been made for a moratorium,
              composition or arrangement in relation to any of its debts, or
              for a voluntary arrangement under Part 1 of the Insolvency Act
              1986; and

       18.1.8 no event analogous to any of the above has occurred in any
              jurisdiction.

18.2   In relation to the Seller:-

       18.2.1 no resolution has been passed, no petition has been presented and
              no order has been made for administration or winding up or for
              the appointment of a receiver or provisional liquidator;

       18.2.2 no receiver has been appointed, no Encumbrance has been enforced,
              no floating charge has crystallised and no distress, execution or
              other process has been levied, on or over any of the Company
              Shares; and

       18.2.3 no event analogous to any of the above has occurred in any
              jurisdiction.

19.    INTELLECTUAL PROPERTY

19.1   No member of the Target Group is the registered proprietor of any
       Registered Intellectual Property and there are no applications for the
       registration of any Intellectual Property by any member of the Target
       Group pending.





                                      115
<PAGE>   116
19.2   All Intellectual Property currently used in or in connection with the
       business of the Target Group and which is material to the Target Group
       as a whole is legally and beneficially owned by a member of the Target
       Group and is used exclusively by it.

19.3   To the Knowledge of the Seller, the processes and methods employed, the
       services provided, the business conducted and the products manufactured
       used or dealt with by the Target Group do not infringe any Intellectual
       Property of any third party.

20.    INSURANCE

Attached to the Disclosure Letter is a true and complete copy of the insurances
maintained for the two years prior to the date of this Agreement in respect of
the Target Group's assets and Properties which are of an insurable nature.  All
premiums under such insurances have been paid up to date, and there have been
no claims made under such insurances during the twelve months prior to the date
hereof and there are no claims outstanding thereunder.

21.    PENSION SCHEMES

21.1   Other than the Legal and General Group Personal Pension Plan ("Pension
       Plan") there are no pension, retirement benefit or similar schemes or
       arrangements for the provision of "relevant benefits" within the meaning
       of Section 612 of the Taxes Act for or in respect of the employees or
       former employees of the Company or any of the Subsidiaries and neither,
       to the Knowledge of the Seller, the Company nor any of the Subsidiaries
       is there any legally binding obligation, other than those under the
       Pension Plan, to pay any pension or make any other payment after
       retirement or death or otherwise to provide "relevant benefits" as
       aforesaid to or in respect of any employee of the Target Group.





                                      116
<PAGE>   117
21.2   The level of contributions made by the Company or any of the
       Subsidiaries pursuant to, and the terms of, the Pension Plan are
       contained in the Disclosure Letter.

22.    EMPLOYMENT MATTERS

22.1   No member of the Target Group is a party (i) to any consultancy
       agreements or arrangements with any person nor to any contract for
       services to be provided to any member of the Target Group by any
       individual as a sub-contractor, outworker or otherwise where the
       consideration paid under the agreement or arrangement or contract for
       services exceeds L.25,000 nor (ii) to any written service agreements
       with any of its directors.

22.2   There are no contracts of service with employees (whether or not in
       writing) which cannot be terminated by a member of the Target Group by
       three months' notice or less without giving rise to any claim for
       damages or compensation (other than a statutory redundancy payment or
       statutory compensation for unfair dismissal) and no member of the Target
       Group has given or received notice of resignation from any of the
       employees.

22.3   Save as set out in the schedule of employees attached to the Disclosure
       Letter:

       22.3.1 no member of the Target Group has any employees with an annual
              salary in excess of L.25,000;

       22.3.2 there are no material terms and conditions of employment for any
              employee other than Target Group's written standard terms and
              conditions of employment as annexed to the Disclosure Letter;





                                      117
<PAGE>   118
       22.3.3 no employee receives or is entitled (contingently or otherwise)
              to receive any bonus, commission, variable remuneration,
              insurance, benefit in kind, motor vehicle for private use or
              other reward other than wages or salary at a fixed rate;

       and true, complete and accurate particulars of each employee's current
       remuneration, date of commencement of continuous employment (for the
       purposes of the Employment Protection (Consolidation) Act 1978) appear
       in that schedule together with such employee's age and sex as notified
       to the relevant company.

22.4   No member of the Target Group has offered or agreed to increase the
       remuneration of, or altered or sought to alter any of the terms and
       conditions of employment of, any employee compared to those shown in the
       schedule to the Disclosure Letter.

22.5   There are no trade unions or other bodies representing employees or any
       of them and no member of the Target Group recognises any trade union or
       other body representing employees or any of them.

22.6   There has been no strike or work to rule by any employee or collective
       withdrawal of labour by more than five employees for the purposes of
       industrial action within the 2 years prior to the date of this
       Agreement.

22.7   No member of the Target Group has within the period of 12 months
       preceding the date of this Agreement given notice of any redundancies to
       the Secretary of State or started consultations with any appropriate
       representative under the provisions of Part IV of the Trade Union and
       Labour Relations (Consolidation) Act 1992, nor has any member of the
       Target Group failed to comply with such obligation under that Part.





                                      118
<PAGE>   119
22.8   No member of the Target Group has within the period of 12 months
       preceding the date of this Agreement been a party to any relevant
       transfer as defined in the Transfer of Undertakings (Protection of
       Employment) Regulations 1981 nor has any member of the Target Group
       failed to comply with any duty to inform and consult any appropriate
       representative under the said Regulations.

22.9   Each member of the Target Group has in relation to each of its present
       employees complied with all terms of their contracts of employment and
       all statutes, statutory instruments, collective agreements, customs and
       practices which are binding upon it and no such member has any
       obligation to make any ex gratia payment to any such employee.

22.10  There is no share incentive scheme, share option scheme, profit sharing
       scheme or other bonus or incentive scheme for all or any employees nor
       has any proposal been announced to establish any such scheme.

22.11  No member of the Target Group has any liability as a former member,
       officer or shadow director of any person.

22.12  There are no outstanding claims or proceedings by or against any former
       employee of any member of the Target Group and the Seller has no
       knowledge of any such claim or proceedings pending or threatened.





                                      119
<PAGE>   120
                                   SCHEDULE 9
                            GUARANTEES AND SURETIES

                                     Part 1

(i)    CONTRACT DATED 1 NOVEMBER 1994 BETWEEN (1) CHEVRON UK LIMITED AND (2)
       NDESL IN RESPECT OF BRITANNIA FIELD (NO. BRT1-XA7)

       Guarantee dated 20 September 1994 between

       (1)    Chevron UK Limited and
       (2)    Nabors Industries, Inc. (guarantor)

(ii)   CONTRACT DATED 15 JULY 1995 BETWEEN (1) ELF ENTERPRISE CALEDONIAN LTD
       AND (2) NDESL (NO. CA-7400)

       Guarantee dated 20 July 1995 between

       (1)    Elf Enterprise Caledonian Ltd and
       (2)    Nabors Industries, Inc. (guarantor)

                                     Part 2

None





                                      120
<PAGE>   121
                                  SCHEDULE 10
                         DRILL PIPE AND INSTRUMENTATION


PART 1 - DRILL PIPE

                             SOVEREIGN DRILL STRING


<TABLE>
<CAPTION>
STRING                                                                 NUMBER OF
NO.                              DESCRIPTION                            JOINTS
- ------                           -----------                           ---------
<S>   <C>                                                                 <C>
1.    5 1/2" FH S 135 Drill Pipe Range 2, 2.90# per foot Armacor M        383
      hardbanding on box.  Internal coating TK34 Tool Joints 2"
      longer than standard Tool Unit OD 7 1/4" x 3 1/2"

2.    5" Drill Pipe S-135 Range 2, 19.5 lb/ft 4 1/2 IF Connection 6       466
      5/8" OD x 3 1/4" ID Tool Joints 2" longer than standard Armacor
      M hardbanding on box.  Internal coating PC200 c/w pressed steel
      protectors.

3.    5" Drill Pipe S-135 Range 2, 19.5 lb/ft 4 1/2 IF Connection 6       483
      5/8" OD x 3  1/4" ID Tool Joints 2" longer than standard
      Armacor M hardbanding on box.  Internal coating PC200 c/w
      pressed steel protectors.

4.    3 1/2 Grade S-135 Range 2, 13.3 lbs/ft, 3 1/2 IF Connections 4      326
      3/4" OD x 2 9/16 ID 2" longer than standard Armacor M
      hardbanding on box.  Internal coating PC200 c/w pressed steel
      protectors.

5.    3 1/2 Grade S-135 Range 2, 13.3 lbs/ft, 3 1/2 IF Connections 4      322
      3/4" OD x 2 9/16 ID 2" longer than standard Armacor M
      hardbanding on box.  Internal coating PC200 c/w pressed steel
      protectors.
</TABLE>





                                      121
<PAGE>   122
PART 2 - INSTRUMENTATION

               MARTIN DECKER TOTCO DATA ACQUISITION (DAQ) SYSTEM

The MD Totco TOTAL Data Acquisition (DAQ) System is configured with a
combination of the following "TOTAL" modules:

o      TOTAL Data Acquisition Module System 3* USX 000A
o      VISULOGGER XC Management Module
o      WITS Interface Module UY 200 B
o      SAFE Area Display Module UYX 021
o      M/D TOTCO Certification Module
o      M/D TOTCO Sensor Module

In addition, the GASWATCH - XC Gas Detection System has been installed.





- ---------------

     * To be upgraded  by MD  Totco to System  4 at no  cost (refer 2.10/1/d
       of Disclosure Bundle).

                                      122
<PAGE>   123
                                  SCHEDULE 11

                                 ESCROW ACCOUNT

1.     The Escrow Account shall be in the joint names of Baker & McKenzie of
       100 New Bridge St, London EC4 ("the Seller's Solicitors") and Pinsent
       Curtis of 69 Old Broad St, London EC2 ("the Buyer's Solicitors") and
       shall be designated "Nabors Europe Escrow Account" and the amount for
       the time being standing to its credit (including the amount of interest
       credited thereto) is hereinafter referred to as "the Deposit".

2.     Subject as ordered by a court of competent jurisdiction :-

       2.1    except as provided herein, no payment shall be made out of the
              Escrow Account;

       no payment shall be made out of the Escrow Account except in accordance
       with the bank mandate in relation to the Escrow Account which shall
       require the signature of one authorised signatory from each of the
       Seller's Solicitors and the Buyer's Solicitors;

       2.2    if Closing does not occur on or before 21 November 1996, the
              Deposit shall be paid to the Seller's Solicitors as agent for the
              Seller forthwith without further authority on the part of the
              Buyer; and

       2.3    if Closing shall occur at any time on or before 21 November 1996,
              then the Deposit shall be paid immediately following Closing to
              the Buyer's Solicitors as agent for the Buyer without further
              authority on the part of the Seller.





                                      123
<PAGE>   124
3.     The payment out to the Seller or to the Buyer of the Deposit pursuant to
       paragraph 2.3 or 2.4 above shall be without prejudice to the rights of
       the other to claim that it is lawfully entitled to all or some part of
       the Deposit pursuant to the terms of the Agreement.

IN WITNESS WHEREOF, the Parties hereto have executed this Agreement on the date
first above written.



SIGNED BY _____________     )
for and on behalf of        )
NABORS INDUSTRIES INC       )



SIGNED BY _____________     )
for and on behalf of        )
KCA DRILLING GROUP LIMITED  )



SIGNED BY _____________     )
for and on behalf of        )
ABBOT GROUP PLC             )





                                      124

<PAGE>   1
                                                                   EXHIBIT 10.16

================================================================================





                            ASSET PURCHASE AGREEMENT

                                 by and between

                          Noble Drilling Corporation,

                             Noble Properties, Inc.

                                      and

                          Noble Drilling (Canada) Ltd.

                                      and

                            Nabors Industries, Inc.





                               November 15, 1996
================================================================================
<PAGE>   2
                               TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                                            Page
<S>                                                                           <C>
PARTIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    1

RECITALS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .    1

ARTICLE I -- CERTAIN DEFINITIONS  . . . . . . . . . . . . . . . . . . . . .    1

ARTICLE II -- PURCHASE AND SALE OF ASSETS . . . . . . . . . . . . . . . . .    4
         2.1     Assets to be Purchased . . . . . . . . . . . . . . . . . .    4
         2.2     Excluded Assets  . . . . . . . . . . . . . . . . . . . . .    5
         2.3     Assumed Liabilities  . . . . . . . . . . . . . . . . . . .    6
         2.4     Limitation on Assignments  . . . . . . . . . . . . . . . .    6
         2.5     Delivery of Records  . . . . . . . . . . . . . . . . . . .    6

ARTICLE III -- PURCHASE PRICE . . . . . . . . . . . . . . . . . . . . . . .    7
         3.1     Consideration for the Purchased Assets . . . . . . . . . .    7
         3.2     Buyer's Default  . . . . . . . . . . . . . . . . . . . . .    7
         3.3     Return of Deposit  . . . . . . . . . . . . . . . . . . . .    8
         3.4     Allocation of Purchase Price . . . . . . . . . . . . . . .    8

ARTICLE IV -- THE CLOSING . . . . . . . . . . . . . . . . . . . . . . . . .    8
         4.1     Time and Place of Closing  . . . . . . . . . . . . . . . .    8
         4.2     Deliveries by Sellers  . . . . . . . . . . . . . . . . . .    8
         4.3     Deliveries by Buyer  . . . . . . . . . . . . . . . . . . .    9

ARTICLE V -- REPRESENTATIONS AND WARRANTIES OF SELLERS  . . . . . . . . . .    9
         5.1     Organization and Existence . . . . . . . . . . . . . . . .    9
         5.2     Authority; Etc . . . . . . . . . . . . . . . . . . . . . .    9
         5.3     No Violations  . . . . . . . . . . . . . . . . . . . . . .   10
         5.4     Ownership of   . . . . . . . . . . . . . . . . . . . . . .   10
         5.5     Inventory  . . . . . . . . . . . . . . . . . . . . . . . .   10
         5.6     Contracts  . . . . . . . . . . . . . . . . . . . . . . . .   11
         5.7     Litigation . . . . . . . . . . . . . . . . . . . . . . . .   11
         5.8     Governmental Approval  . . . . . . . . . . . . . . . . . .   11
         5.9     Compliance With Laws . . . . . . . . . . . . . . . . . . .   12
         5.10    Employees and Related Matters  . . . . . . . . . . . . . .   12
         5.11    Real Property  . . . . . . . . . . . . . . . . . . . . . .   12
         5.12    Environmental Matters  . . . . . . . . . . . . . . . . . .   12
         5.13    No Brokers . . . . . . . . . . . . . . . . . . . . . . . .   13
         5.14    Decrees, etc.  . . . . . . . . . . . . . . . . . . . . . .   13
         5.15    Performance Bonds; Letters of Credit . . . . . . . . . . .   13
</TABLE>





                                       i
<PAGE>   3
<TABLE>
<S>                                                                           <C>
ARTICLE VI -- REPRESENTATIONS AND WARRANTIES OF BUYER . . . . . . . . . . .   13
         6.1     Organization and Existence . . . . . . . . . . . . . . . .   13
         6.2     Authority; Etc . . . . . . . . . . . . . . . . . . . . . .   13
         6.3     No Violations  . . . . . . . . . . . . . . . . . . . . . .   14
         6.4     Governmental Approval  . . . . . . . . . . . . . . . . . .   14
         6.5     Litigation . . . . . . . . . . . . . . . . . . . . . . . .   15
         6.6     No Brokers . . . . . . . . . . . . . . . . . . . . . . . .   15
         6.7     Certain Knowledge Regarding Assignment of Contracts  . . .   15

ARTICLE VII -- CONDITIONS TO THE OBLIGATIONS OF SELLERS . . . . . . . . . .   15
         7.1     Accuracy of Representations and Warranties . . . . . . . .   15
         7.2     Covenants and Agreements Performed . . . . . . . . . . . .   15
         7.3     Officer's Certificate  . . . . . . . . . . . . . . . . . .   15
         7.4     Legal Opinion  . . . . . . . . . . . . . . . . . . . . . .   15
         7.5     HSR Act  . . . . . . . . . . . . . . . . . . . . . . . . .   15

ARTICLE VIII -- CONDITIONS TO THE OBLIGATIONS OF BUYER  . . . . . . . . . .   16
         8.1     Accuracy of Representations and Warranties . . . . . . . .   16
         8.2     Covenants and Agreements Performed . . . . . . . . . . . .   16
         8.3     Officer's Certificate  . . . . . . . . . . . . . . . . . .   16
         8.4     Legal Opinion  . . . . . . . . . . . . . . . . . . . . . .   16
         8.5     HSR Act  . . . . . . . . . . . . . . . . . . . . . . . . .   16

ARTICLE IX -- COVENANTS AND AGREEMENTS OF THE PARTIES BEFORE,
         RELATING TO AND SUBSEQUENT TO THE CLOSING  . . . . . . . . . . . .   16
         9.1     Expenses . . . . . . . . . . . . . . . . . . . . . . . . .   16
         9.2     HSR Act Compliance . . . . . . . . . . . . . . . . . . . .   16
         9.3     Access . . . . . . . . . . . . . . . . . . . . . . . . . .   17
         9.4     Conduct of Business and Preservation of Assets . . . . . .   17
         9.5     Transition of Business Operations  . . . . . . . . . . . .   17
         9.6     Litigation . . . . . . . . . . . . . . . . . . . . . . . .   17
         9.7     Certain Taxes  . . . . . . . . . . . . . . . . . . . . . .   18
         9.8     Actions with Respect to Closing  . . . . . . . . . . . . .   18
         9.9     Public Statements  . . . . . . . . . . . . . . . . . . . .   18
         9.10    Books and Records  . . . . . . . . . . . . . . . . . . . .   18
         9.11    Purchased Asset Loss . . . . . . . . . . . . . . . . . . .   19
         9.12    Use of Name  . . . . . . . . . . . . . . . . . . . . . . .   19
         9.13    Continued Effectiveness of Representations
                 and Warranties . . . . . . . . . . . . . . . . . . . . . .   19
         9.14    Performance Bonds; Import Duties . . . . . . . . . . . . .   19
         9.15    Post-Closing Collection, Payment and
                 Administrative Procedures  . . . . . . . . . . . . . . . .   20
         9.16    Removal of Certain Purchased Assets  . . . . . . . . . . .   20

ARTICLE X -- EMPLOYEES  . . . . . . . . . . . . . . . . . . . . . . . . . .   20
         10.1    Employees  . . . . . . . . . . . . . . . . . . . . . . . .   20
</TABLE>





                                       ii
<PAGE>   4
<TABLE>
<S>                                                                           <C>
ARTICLE XI -- TERMINATION . . . . . . . . . . . . . . . . . . . . . . . . .   21
         11.1    Termination  . . . . . . . . . . . . . . . . . . . . . . .   21
         11.2    Effect of Termination  . . . . . . . . . . . . . . . . . .   22

ARTICLE XII -- EXTENT AND SURVIVAL OF REPRESENTATIONS,
         WARRANTIES, COVENANTS AND AGREEMENTS . . . . . . . . . . . . . . .   22
         12.1    Scope of Representations of Sellers  . . . . . . . . . . .   22
         12.2    Indemnification by Parent  . . . . . . . . . . . . . . . .   23
         12.3    Indemnification by Buyer . . . . . . . . . . . . . . . . .   23
         12.4    Indemnification Procedure  . . . . . . . . . . . . . . . .   23
         12.5    Survival . . . . . . . . . . . . . . . . . . . . . . . . .   24
         12.6    Tax Benefits; Insurance Proceeds . . . . . . . . . . . . .   24
         12.7    Applicability of Indemnification Obligation  . . . . . . .   24

ARTICLE XIII -- MISCELLANEOUS . . . . . . . . . . . . . . . . . . . . . . .   25
         13.1    Notices  . . . . . . . . . . . . . . . . . . . . . . . . .   25
         13.2    Entire Agreement . . . . . . . . . . . . . . . . . . . . .   26
         13.3    Amendments and Waiver; Rights and Remedies . . . . . . . .   26
         13.4    Governing Law  . . . . . . . . . . . . . . . . . . . . . .   26
         13.5    Binding Effect; Assignment . . . . . . . . . . . . . . . .   26
         13.6    Counterparts . . . . . . . . . . . . . . . . . . . . . . .   27
         13.7    References . . . . . . . . . . . . . . . . . . . . . . . .   27
         13.8    Severability of Provisions . . . . . . . . . . . . . . . .   27
         13.9    Gender . . . . . . . . . . . . . . . . . . . . . . . . . .   27
         13.10   Descriptive Headings . . . . . . . . . . . . . . . . . . .   27
</TABLE>





                                      iii
<PAGE>   5
                            ASSET PURCHASE AGREEMENT

         This ASSET PURCHASE AGREEMENT (this "Agreement") is dated as of
November 15, 1996, by and between Nabors Industries, Inc., a Delaware
corporation ("Buyer"), and Noble Drilling Corporation, a Delaware corporation
("Parent"), Noble Properties, Inc., an Oklahoma corporation ("Noble-
Properties"), and Noble Drilling (Canada) Ltd., an Alberta, Canada corporation
("Noble-Canada" and, together with Parent and Noble-Properties, sometimes
referred to herein, collectively, as "Sellers" and, individually, as a
"Seller");

                              W I T N E S S E T H:

         WHEREAS, Buyer desires to purchase the Purchased Assets (as
hereinafter defined) from Sellers; and

         WHEREAS, Sellers desire to sell the Purchased Assets to Buyer in
exchange for the payment by Buyer of the Purchase Price (as hereinafter
defined) and the assumption by Buyer of the Assumed Liabilities (as hereinafter
defined);

         NOW, THEREFORE, in consideration of the premises and the mutual terms,
covenants and conditions herein contained, and intending to be legally bound
hereby, the parties hereto hereby agree as follows:

                                   ARTICLE I

                              CERTAIN DEFINITIONS

         As used in this Agreement, the following terms have the following
respective meanings:

         "Affiliate" means, as to the person specified, any person controlling,
controlled by or under common control with such person, with the concept of
control in such context meaning the possession, directly or indirectly, of the
power to direct or cause the direction of the management and policies of
another, whether through the ownership of voting securities, by contract or
otherwise.

         "Agreement" has the meaning specified in the preamble.

         "Applicable Environmental Laws" has the meaning specified in Section
5.12(b).

         "Applicable Laws" has the meaning specified in Section 5.9.

         "Assumed Liabilities" has the meaning specified in Section 2.3.





                                       1
<PAGE>   6
         "Best Efforts" means a party's best efforts in accordance with
reasonable commercial practice and without the incurrence of unreasonable
expense.

         "Business Day" means a day on which national banks are generally open
for the transaction of business in Houston, Texas.

         "Buyer" has the meaning specified in the preamble.

         "Buyer Basket" has the meaning specified in Section 12.2.

         "Buyer Designee" has the meaning specified in Section 13.5(b)(ii).

         "Claims" has the meaning specified in Section 12.2.

         "Closing" means the consummation of the transactions contemplated by
Article II of this Agreement in accordance with the terms and upon the
conditions set forth in Article II.

         "Closing Date" has the meaning specified in Section 4.1.

         "Code" means the Internal Revenue Code of 1986, as amended.

         "Consent Required Contract" has the meaning specified in Section 2.4.

         "Deeds" has the meaning specified in Section 4.2(b).

         "Deposit" has the meaning specified in Section 3.1(a).

         "Drilling Contract" has the meaning specified in Section 2.1(f)(i).

         "Employees" has the meaning specified in Section 10.1(a).

         "Encumbrances" means liens, charges, pledges, options, mortgages,
security interests, claims, easements, rights-of-way, servitudes, title defects
and other encumbrances of every type and description, whether imposed by law,
agreement, understanding or otherwise.

         "Environmental Claims" has the meaning specified in Section 12.3.

         "ERISA" means the Employee Retirement Income Security Act of 1974, as
amended.

         "ERISA Affiliate" has the meaning specified in Section 5.10.





                                       2
<PAGE>   7
         "Escrow Agent" has the meaning specified in Section 3.1(a).

         "Escrow Agreement" has the meaning specified in Section 3.1(a).

         "Excluded Assets" has the meaning specified in Section 2.2.

         "General Assignment" has the meaning specified in Section 4.2(a).

         "Governmental Entity" means any court or tribunal in any jurisdiction
(domestic or foreign) or any public, governmental or regulatory body, agency,
department, commission, board, bureau or other authority or instrumentality
(domestic or foreign).

         "hazardous material" has the meaning specified in Section 5.12(b).

         "HSR Act" means the Hart-Scott-Rodino Antitrust Improvements Act of
1976, as amended, and the rules and regulations promulgated thereunder.

         "Indemnified Party" has the meaning specified in Section 12.4.

         "Indemnifying Party" has the meaning specified in Section 12.4.

         "Inventory" has the meaning specified in Section 2.1(c).

         "Leases" has the meaning specified in Section 2.1(d).

         "Marketed Rigs" has the meaning specified in Section 2.1(a).

         "Noble-Canada" has the meaning specified in the preamble.

         "Noble-Properties" has the meaning specified in the preamble.

         "Nonassigned Contract" has the meaning specified in Section 2.4.

         "Other Contract" has the meaning specified in Section 2.1(f)(ii).

         "Parent" has the meaning specified in the preamble.

         "Permits" has the meaning specified in Section 2.1(e)(ii).

         "Permitted Encumbrances" means (i) Encumbrances for taxes, assessments
and governmental charges not yet due and payable or the validity of which are
being contested in good faith by appropriate proceedings; (ii) statutory liens
arising in the ordinary course of business relating to obligations as to which
there is no default on the part of Sellers, excluding any mortgage; (iii) the
Drilling Contracts, Other Contracts and





                                       3
<PAGE>   8
Leases; and (iv) any other Encumbrances which in the aggregate do not exceed
$50,000; provided, however, that at the Closing "Permitted Encumbrances" shall
not include any Encumbrances for taxes, assessments or governmental charges
filed of record against the Purchased Assets, or statutory liens filed of
record against the Purchased Assets, unless any such Encumbrances are being
diligently contested in good faith by appropriate proceedings.

         "Permitted Real Property Encumbrances" means (i) Encumbrances for
taxes, assessments and governmental charges not yet due and payable or the
validity of which are being contested in good faith by appropriate proceedings;
(ii) statutory liens arising in the ordinary course of business relating to
obligations as to which there is no default on the part of Sellers, excluding
any mortgage; (iii) zoning laws and ordinances and similar governmental
regulations; (iv) rights reserved to any municipality or governmental,
statutory or public authority to regulate such property; (v) Encumbrances
arising from or relating to Environmental Claims; (vi) the Other Contracts; and
(vii) any other Encumbrances which in the aggregate do not exceed $50,000;
provided, however, that at the Closing "Permitted Real Property Encumbrances"
shall not include any Encumbrance for taxes, assessments or governmental
charges filed of record against the Real Estate Assets, or statutory liens
filed of record against the Real Estate Assets, unless any such Encumbrances
are being diligently contested in good faith by appropriate proceedings.

         "Proceedings" means all proceedings, actions, claims, suits,
investigations and inquiries by or before any arbitrator or Governmental
Entity.

         "Purchased Assets" has the meaning specified in Section 2.1.

         "Purchase Price" shall mean $60,000,000.

         "Real Estate Assets" has the meaning specified in Section 2.1(d).

         "Real Property" has the meaning specified in Section 2.1(d).

         "Rigs" has the meaning specified in Section 2.1(b).

         "Seller Basket" has the meaning specified in Section 12.3.

         "Seller Designee" has the meaning specified in Section 13.5(b)(i).

         "Sellers" has the meaning specified in the preamble.

         "Stacked Rigs" has the meaning specified in Section 2.1(b).

         "Taxes" has the meaning specified in Section 9.7.





                                       4
<PAGE>   9
                                   ARTICLE II

                          PURCHASE AND SALE OF ASSETS

         2.1     Assets to be Purchased.  Upon the terms and subject to the
conditions set forth in this Agreement, at the Closing, Sellers agree to sell,
assign, transfer, deliver and convey to Buyer, and Buyer agrees to purchase,
the following (collectively, the "Purchased Assets"):

         (a)     the 19 land drilling rigs currently marketed by Sellers
described on Schedule 2.1(a) (collectively, the "Marketed Rigs");

         (b)     the equipment described on Schedule 2.1(b), which collectively
constitutes the Sellers' 28 stacked land drilling rigs (collectively, the
"Stacked Rigs," and, together with the Marketed Rigs, the "Rigs");

         (c)     the stocks owned by Sellers or any of their Affiliates
described on Schedule 2.1(c) (collectively, "Inventory"), as such Inventory may
be reduced through consumption thereof, or increased through replacement
thereof or addition thereto, in the ordinary course of the maintenance and
operation of the Rigs through the Closing Date;

         (d)     the leasehold interests in real property (the "Leases")
described on Schedule 2.1(d)(i) and real property fee ownership described on
Schedule 2.1(d)(ii) (the "Real Property"), together with all buildings,
fixtures and other improvements upon the Real Property (except, in the case of
Leases, buildings, fixtures and other improvements owned by persons or entities
other than Sellers or their Affiliates) and all rights, easements, rights-of-
way and other interests incidental thereto that are used or held for use by
Seller in connection with the ownership, maintenance or operation of the
Purchased Assets (the "Real Estate Assets");

         (e)     the following tangible and intangible assets used or held for
use in connection with the ownership, maintenance and operation of the Rigs or
the Real Estate Assets, to the extent assignable by law and Sellers or their
Affiliates have the right to assign and transfer such assets:

                 (i)      all records to be delivered to Buyer pursuant to
         Section 2.5; and

                 (ii)     the certificates, licenses, permits, consents,
         operating authorities, orders, exemptions, franchises, approvals,
         registrations and other authorizations and applications therefor
         specifically associated with the maintenance and operation of a Rig
         and listed on Schedule 2.1(e)(ii) hereto ("Permits"); and

         (f)     the benefit and burden subsequent to the Closing Date of:





                                       5
<PAGE>   10
                 (i)      all drilling contracts and any amendments thereto for
         the employment of the Rigs existing on the Closing Date (the "Drilling
         Contracts"), including without limitation the Drilling Contracts
         identified on Schedule 2.1(f)(i) hereto existing on the Closing Date;
         and

                 (ii)     all other contracts to which Sellers or any of their
         Affiliates is a party relating to the ownership, maintenance and
         operation of the Rigs or the Real Estate Assets existing on the
         Closing Date and described on Schedule 2.1(f)(ii) (the "Other
         Contracts").

         2.2     Excluded Assets.  The Purchased Assets to be transferred by
Sellers to Buyer hereunder shall include only those described or referred to in
Section 2.1, and no other assets or properties of Sellers shall be transferred
to Buyer hereunder.  Without limiting the generality of the preceding sentence,
the Purchased Assets shall not include (i) Seller's subsidiaries, (ii) any top
drive unit, (iii) any contractual rights or other assets relating to the
participation of any Affiliate of Parent in the "Hibernia Project" relating to
the operation and maintenance of platform rigs off the coast of Newfoundland,
(iv) any contractual rights or other assets of Sellers relating to Sellers' or
their Affiliates' business or operations in any country other than the United
States and Canada (including without limitation Russia or any of the countries
that formerly constituted the U.S.S.R.), (v) cash, accounts receivable, prepaid
expenses and deposits or (vi) claims and rights under contracts not assigned to
and assumed by Buyer hereunder and, in the case of contracts that are assigned
to and assumed by Buyer, claims and rights thereunder to the extent, but only
to the extent, that such claims and rights relate to the ownership or operation
of the Purchased Assets prior to the Closing, including, without limitation,
claims for reimbursements, day, footage or turnkey rates, lost equipment,
indemnity or escalation of fees that relate to periods prior to the Closing
Date, whether or not billed on the Closing Date (collectively, the "Excluded
Assets").

         2.3     Assumed Liabilities.  As of the Closing Date, Buyer shall not
assume or otherwise be obligated for any obligations of Sellers or their
Affiliates except for all obligations under the Drilling Contracts, Other
Contracts and Leases being assumed by Buyer to the extent, but only to the
extent, that such obligations relate to the conduct of the ownership or
operation of the Purchased Assets after the Closing, but, excluding accounts
payable and accrued liabilities for property received by Seller or for services
performed, on or prior to the Closing (collectively, the "Assumed
Liabilities"), which Drilling Contracts, Other Contracts and Leases Buyer shall
assume and thereafter perform.

         2.4     Limitation on Assignments.  Notwithstanding any other
provision hereof, this Agreement shall not constitute nor require an assignment
to Buyer of any Drilling Contract, Other Contract, Lease, Permit, license or
other right if an attempted assignment of the same without the consent of any
party would constitute a breach thereof or a violation of any law or any
judgment, decree, order, writ, injunction, rule or regulation of





                                       6
<PAGE>   11
any Governmental Entity unless and until such consent shall have been obtained.
In the case of any such Drilling Contract, Other Contract, Lease, Permit,
license or other right that cannot be effectively transferred to Buyer without
such consent (a "Consent Required Contract"), Sellers agree that between the
date hereof and the Closing Date they will use their Best Efforts to obtain or
cause to be obtained the necessary consents to the transfer of any Consent
Required Contract.  Buyer agrees to cooperate and to cause any Buyer Designee
to cooperate with Sellers in obtaining such consents and to enter into such
arrangement of assumption as may be reasonably requested by Sellers or the
other contracting party under a Consent Required Contract.  In the event that
Sellers shall have failed prior to the Closing Date to obtain consents to the
transfer of any Consent Required Contract, the terms of this Section 2.4 shall
govern the transfer of the benefits of each such contract.  Sellers and Buyer
shall use their Best Efforts after the Closing Date to obtain any required
consent to the assignment to, and assumption by, Buyer of each Consent Required
Contract that is not transferred to Buyer at the Closing (a "Nonassigned
Contract").  Sellers, or a Seller Designee, and Buyer, or a Buyer Designee,
shall enter into an agreement substantially in the form of that attached hereto
as Exhibit 2.4 on the Closing Date with respect to each Nonassigned Contract
providing that until the rights and obligations of Sellers thereunder are
transferred to or assumed by Buyer, or, if earlier, until termination of such
Nonassigned Contract, Sellers shall continue to perform their obligations
thereunder and Buyer shall provide such assistance, at the sole expense of
Buyer, as Sellers may reasonably request for such purpose, including, without
limitation, the use of personnel and assets (by lease or otherwise) of Buyer
and its Affiliates of the type and quantity that Sellers would have used to
perform such Nonassigned Contract had the transactions contemplated by this
Agreement not been consummated.  Such agreement shall also provide that in
consideration of the provision of such assistance, Sellers shall, promptly
after payment of any amounts to Sellers by the other party to a Nonassigned
Contract, pay such amounts to Buyer after subtracting therefrom the costs and
expenses incurred by Sellers as a result of its performance of the Nonassigned
Contract.

         2.5     Delivery of Records.

         (a)     Buyer shall be entitled to the records physically located on
the Rigs or at the location thereof on the Closing Date and relevant to the
Rigs.

         (b)     As promptly following the Closing as practicable, Sellers
shall deliver or cause to be delivered to Buyer at the offices where such
records are located or such other location as mutually agreed, a copy of the
technical records described on Schedule 2.5(b) in the possession of Sellers or
their Affiliates related to the Rigs or the Inventory, and that are not
physically located on the Rigs or at the location thereof.

         (c)     Sellers shall be entitled to retain all originals of its
corporate, financial, accounting, legal, tax and audit records.





                                       7
<PAGE>   12
                                  ARTICLE III

                                 PURCHASE PRICE

         3.1     Consideration for the Purchased Assets.

         (a)     Concurrently with the execution and delivery of this
Agreement, Buyer, Parent and Southwest Bank of Texas, N.A. (the "Escrow Agent")
have executed and delivered the escrow agreement dated of even date herewith
among Buyer, Parent and the Escrow Agent (the "Escrow Agreement"), a copy of
which is attached as Exhibit 3.1(a), and Buyer has delivered to the Escrow
Agent an amount in cash equal to $10,000,000 (the "Deposit").  Buyer and
Sellers agree that the Escrow Agent shall hold and deliver the Deposit in
accordance with the terms and conditions set forth in the Escrow Agreement.

         (b)     At the Closing, Buyer shall pay to Sellers the Purchase Price
by (i) delivering to Sellers the amount of $50,000,000 in immediately available
funds by confirmed wire transfer to a bank account to be designated by Parent
(such designation to occur no later than the second business day prior to the
Closing Date), and (ii) causing the Escrow Agent to deliver by wire transfer to
such bank account of the Sellers the Deposit, in accordance with the Escrow
Agreement.

         (c)     As additional consideration for the Purchased Assets, the
Buyer shall assume at Closing and shall thereafter perform the Assumed
Liabilities.

         3.2     Buyer's Default.  Sellers shall be entitled to receive the
Deposit, as liquidated damages and not as a penalty, without right on the part
of Buyer to a return thereof if the Closing

                 (i)      does not occur on the Closing Date by reason of
         Buyer's default under the terms of this Agreement; or

                 (ii)     does not occur by January 31, 1997 and Sellers have
         performed their covenants set forth in Section 9.4, unless Buyers have
         performed their covenants set forth in Section 9.4 and the sole reason
         the Closing has not occurred by such date is that the conditions in
         Sections 7.5 and 8.5 have not been satisfied;

provided, however, that in the case of clause (i) and clause (ii), Sellers must
show themselves then able and willing to satisfy the conditions set forth in
Section 8.1, 8.2, 8.3 and 8.4.

         Buyer shall be deemed in default for the purpose of this Section 3.2
if Buyer (i) shall have been unable to satisfy any of the conditions set forth
in Sections 7.1, 7.2, 7.3 or 7.4, or (ii) shall have failed to perform any of
Buyer's material covenants of this Agreement or have been in material and
willful breach of this Agreement, including by not delivering or





                                       8
<PAGE>   13
having insufficient funds to deliver the Purchase Price.  Notwithstanding
anything to the contrary contained in this Agreement, if the Closing does not
occur on the Closing Date or there is no Closing by January 31, 1997 by reason
of Buyer's default under the terms of the immediately preceding sentence,
Sellers' sole and exclusive remedy against Buyer and its Affiliates shall be to
receive the Deposit, which the parties stipulate shall be liquidated damages
and not a penalty.

         3.3     Return of Deposit.  In the event the Closing shall not occur
and Sellers are not entitled to receive the Deposit pursuant to Section 3.2,
the Deposit shall be returned to Buyer in the manner specified in the Escrow
Agreement.

         3.4     Allocation of Purchase Price.  The Purchase Price shall be
allocated among the Purchased Assets in the manner set forth on Schedule 3.4.
After the Closing, Parent and Buyer shall cooperate with each other in the
preparation, execution and filing of (i) all information returns and
supplements thereto required to be filed with the Internal Revenue Service by
the parties under Section 1060 of the Code and the Treasury Regulations
promulgated thereunder relating to the allocation of the Purchase Price and
(ii) all similar filings required to be filed with respect to the transactions
contemplated by this Agreement with the Internal Revenue Service and other
appropriate taxing authorities.

                                   ARTICLE IV

                                  THE CLOSING

         4.1     Time and Place of Closing.  The Closing shall take place at
the offices of Thompson & Knight, P.C., 1700 Texas Commerce Tower, 600 Travis
Street, Houston, Texas 77002, at 9:00 a.m., local time, on the third Business
Day after the satisfaction of the conditions to the obligations of the parties
set forth in Sections 7.5 and 8.5, or at such other place, date or time as the
parties may agree in writing.  The date on which the Closing is required to
take place is herein referred to as the "Closing Date."

         4.2     Deliveries by Sellers.  At the Closing, Sellers shall deliver
the following to Buyer:

         (a)     a duly executed General Conveyance, Assignment and Bill of
Sale and Transfer and Assumption of Liabilities (the "General Assignment") in
the form of Exhibit 4.2(a), together with such other bills of sale, assignments
and other instruments of transfer, assignment and conveyance as Buyer shall
reasonably request to vest in Buyer or a Buyer Designee good and marketable
title to the Purchased Assets other than the Real Property;

         (b)     special warranty deeds in the form of Exhibit 4.2(b), with
such modifications as are necessary to comply with applicable local law in the
jurisdictions in





                                       9
<PAGE>   14
which the Real Property is located (the "Deeds"), sufficient to transfer to
Buyer good and defensible title to the Real Property, free and clear of all
Encumbrances except for Permitted Real Property Encumbrances.

         (c)     instructions in accordance with the Escrow Agreement;

         (d)     copies of any consents obtained as contemplated by Section
2.4;

         (e)     the certificate and opinion of counsel contemplated by
Sections 8.3 and 8.4, respectively; and

         (f)     an updated version of Schedule 10.1(a).

         4.3     Deliveries by Buyer.  At the Closing, Buyer shall deliver the
following to Sellers:

         (a)     the Purchase Price;

         (b)     a duly executed General Assignment and such other instruments
of transfer and assumption as Seller shall reasonably request in order to cause
an effective assignment to and assumption by Buyer of the Drilling Contracts,
Other Contracts and Leases;

         (c)     instructions in accordance with the Escrow Agreement; and

         (d)     the certificate and opinion of counsel contemplated by
Sections 7.3 and 7.4, respectively.

                                   ARTICLE V

                   REPRESENTATIONS AND WARRANTIES OF SELLERS

         Except as discussed in this Agreement or in the schedules attached to
this Agreement, each Seller hereby represents and warrants, with respect to
itself and the Purchased Assets owned by it, to Buyer as follows:

         5.1     Organization and Existence.  Seller is a corporation duly
incorporated, validly existing and in good standing under the laws of the state
of its incorporation, with all necessary corporate power and authority to own
and lease the Purchased Assets and to carry on its business as such business is
currently conducted.  Seller is duly qualified or licensed to transact business
as a foreign corporation and is in good standing in all jurisdictions in which
the character of the Purchased Assets or the nature of the business currently
conducted by it requires it so to be qualified or licensed unless the failure
so to qualify or be licensed would not reasonably be expected to have a
material adverse effect





                                       10
<PAGE>   15
on Sellers' business taken as a whole or create an Encumbrance on any of the
Purchased Assets except for a Permitted Encumbrance or Permitted Real Property
Encumbrance.

         5.2     Authority; Etc.  Seller has all necessary corporate power and
authority to execute and deliver this Agreement and all agreements, instruments
and documents to be executed and delivered hereunder by Seller, to consummate
the transactions contemplated hereby and to perform all terms and conditions
hereof to be performed by it.  The execution and delivery of this Agreement by
Seller and all agreements, instruments and documents to be executed and
delivered by Seller hereunder, the performance by Seller of all the terms and
conditions hereof to be performed by it and the consummation of the
transactions contemplated hereby have been duly authorized and approved by the
board of directors of Seller, and no other corporate proceedings of Seller are
necessary with respect thereto, except for stockholder approval in the case of
Noble-Properties and Noble-Canada, which will be obtained prior to the Closing
Date.  All persons who have executed and delivered this Agreement, and all
persons who will execute and deliver the other agreements, documents and
instruments to be executed and delivered by Seller hereunder, have been duly
authorized to do so by all necessary actions on the part of Seller.  This
Agreement constitutes, and each other agreement or instrument to be executed by
Seller hereunder, when executed and delivered by Seller, will constitute, the
legal, valid and binding obligation of Seller, enforceable against it in
accordance with its terms, except to the extent the enforceability hereof and
thereof may be limited by bankruptcy, insolvency, moratorium, reorganization or
other laws relating to or affecting creditors' rights generally or by general
principles of equity (regardless of whether such enforceability is considered
in a proceeding in equity or at law).

         5.3     No Violations.  The execution and delivery of this Agreement
by Seller, the fulfillment of and compliance by it with the terms and
conditions hereof and the consummation by it of the transactions contemplated
hereby will not:

         (a)     violate any of the terms of the certificate of incorporation
or bylaws (or the equivalent) of Seller;

         (b)     (i)      except for the consents to assignment referred to in
Section 2.4, result in a breach of or constitute a default under (whether with
notice or the lapse of time or both) any note, bond, mortgage, loan agreement,
indenture or other instrument evidencing borrowed money to which Seller is a
party or by which Seller is bound or to which any of the Purchased Assets is
subject which breach or default would reasonably be expected to have a material
adverse effect on the ownership or operation of the Purchased Assets, or (ii)
result in the creation of any Encumbrance on any of the Purchased Assets, or
otherwise give any person the right to terminate any Drilling Contract, Permit,
Other Contract or Lease assumed by Buyer; or

         (c)     to Seller's knowledge, violate any provision of any law,
statute, rule or administrative regulation or any judgment, order, injunction
or decree of any





                                       11
<PAGE>   16
Governmental Entity applicable to or binding upon Seller, or its assets, except
that no representation is made as to the application of any United States
antitrust law or regulation to the transactions contemplated by this Agreement,
which violation with respect to the matters specified in clauses (b) and (c) of
this Section 5.3 would reasonably be expected to have a material adverse effect
on the ownership or operation of the Purchased Assets taken as a whole.

         5.4     Ownership of Rigs.  Seller owns and, upon Seller's execution
and delivery of the General Assignment, Buyer will own, good and marketable
title to the Rigs, free and clear of all Encumbrances except for Permitted
Encumbrances.

         5.5     Inventory.  Seller owns, and upon Seller's execution and
delivery of the General Assignment, Buyer will own, good and marketable title
to the Inventory reflected on Schedule 2.1(c), as such Inventory may be reduced
through the consumption thereof, or increased through replacement thereof or
additions thereto, in the ordinary course of the maintenance and operation of
the Rigs through the Closing Date, free and clear of all Encumbrances except
for Permitted Encumbrances and Encumbrances, if any, created or permitted to be
imposed by Buyer or a Buyer Designee.

         5.6     Contracts.  Seller has made available to Buyer for review
complete and correct copies of all the Drilling Contracts, Other Contracts and
Leases.  Except as separately identified on Schedule 2.1(f)(i) or 2.1(f)(ii),
each of the Drilling Contracts, Other Contracts and Leases may be transferred
to Buyer without the consent of any person.  All the Drilling Contracts, Other
Contracts and Leases are valid, binding and in full force and effect against
Seller or its Affiliates, as the case may be, and, to Seller's knowledge, are
valid, binding and in full force and effect against the other parties thereto.
Except as set forth on Schedule 5.6, neither Seller nor any of its Affiliates
is in default in any material respect, and no notice of alleged default has
been received by Seller or any of its Affiliates, under any of the Drilling
Contracts, Other Contracts and Leases, no other party thereto is, to the
knowledge of Seller or its Affiliates, in default thereunder in any material
respect, and, to the knowledge of Seller or its Affiliates, there exists no
condition or event which, with or without notice or lapse of time or both,
would constitute a material default under any of the Drilling Contracts, Other
Contracts and Leases by Seller, any of its Affiliates or any other party
thereto.





                                       12
<PAGE>   17
         5.7     Litigation.

         (a)     Except for litigation adequately covered by insurance or
otherwise described on Schedule 5.7(a), there is no litigation and there are no
Proceedings, suits or investigations pending, instituted or, to the knowledge
of Seller, overtly threatened against any of the Purchased Assets or against
Seller or any of its Affiliates and relating to the ownership and operation of
the Purchased Assets before any Governmental Entity applicable to or binding
upon Seller or any of the Purchased Assets that (i) seeks permanent injunctive
relief, (ii) if adversely determined would delay or prevent the consummation of
the transactions contemplated by this Agreement or (iii) would reasonably be
expected to have a material adverse effect on the ownership, maintenance or
operation of the Purchased Assets taken as a whole.

         (b)     Except for matters described on Schedule 5.7(b), neither
Seller nor any of its properties or assets is subject to any judicial or
administrative judgment, order, decree or restraint currently affecting the
ownership, maintenance and operation of the Purchased Assets in a manner that
is material and adverse to the ownership, maintenance and operation of the
Purchased Assets taken as a whole.  Except as referred to on Schedule 5.7(b),
Seller has not received any notifications or charges in writing from any
Governmental Entity involving alleged violations of or alleged obligations to
remediate under occupational safety and health or water quality or other
environmental matters that materially and adversely affect the conduct by
Seller of the ownership, maintenance and operation of the Purchased Assets
taken as a whole or that have not been finally dismissed or otherwise disposed
of.

         5.8     Governmental Approval.  Except for required filings under the
HSR Act and as set forth on Schedule 5.8, no consent, approval, waiver, order
or authorization of, or registration, declaration or filing with, any
Governmental Entity is required to be obtained or made in connection with the
execution and delivery of this Agreement by Seller or the consummation by
Seller of the transactions contemplated hereby, the failure of which to obtain
would have a material adverse effect on the ownership, maintenance and
operation of the Purchased Assets taken as a whole.

         5.9     Compliance With Laws.  Except as set forth on Schedule 5.9,
Seller is not to its knowledge in violation of or in default under any
applicable law, rule, regulation, code, governmental determination, order,
governmental certification requirement or other public limitation that is not
an Applicable Environmental Law (collectively, "Applicable Laws") relating to
the ownership, maintenance or operation of the Purchased Assets, which
violation or default materially and adversely affects Seller's ownership,
maintenance or operation (as presently conducted) of the Purchased Assets, and
no claim is pending or, to Seller's knowledge, overtly threatened with respect
to any such matters which if determined adversely to Seller would have such
effect.





                                       13
<PAGE>   18
         5.10    Employees and Related Matters.  To Seller's knowledge, all of
the employee benefit plans (as defined in Section 3(3) of ERISA) which are or
have been maintained or contributed to by Seller or any incorporated or
unincorporated trade or business (an "ERISA Affiliate") which together with
Seller would be treated as a single employer under Section 414 of the Code have
been maintained and contributed to in compliance with the requirements of
ERISA, the Code and other applicable law; and to Seller's knowledge, Seller and
its ERISA Affiliates have paid and discharged when due all obligations and
liabilities arising under such plans, ERISA, the Code and other Applicable Law
of a character which, if not paid or discharged, are likely to result in the
imposition of an Encumbrance or the assertion of a liability enforceable
against the Purchased Assets.  There are no labor agreements between Seller or
any Affiliate of Seller and any collective bargaining representative who
represents employees employed by Seller or any of its Affiliates which relate
to or affect the ownership, maintenance or operation of the Purchased Assets.

         5.11    Real Property.  Seller owns, and upon execution and delivery
by Seller of the Deeds, Buyer will own, good and defensible title to the Real
Property described on Schedule 2.1(d)(ii), free and clear of all Encumbrances
except Permitted Real Property Encumbrances.

         5.12    Environmental Matters.

         (a)     Seller has received no written notice of any investigation or
inquiry by any Governmental Entity under any Applicable Environmental Laws (as
defined below) relating to the ownership or operation of the Purchased Assets.
To the actual current knowledge of Seller, Seller has not disposed of any
hazardous material (as defined below) on any of the Purchased Assets and no
condition exists on any of the Purchased Assets which would subject Seller or
the Purchased Assets to any remedial obligations under any Applicable
Environmental Laws.

         (b)     For purposes of this Agreement, "Applicable Environmental
Laws" means any and all Applicable Laws pertaining to health, safety, or the
environment in effect in any and all jurisdictions in which the Purchased
Assets are located or in which Seller has conducted operations using any of the
Purchase Assets, including, without limitation, the Clear Air Act, as amended,
the Comprehensive Environmental Response, Compensation and Liability Act of
1980, as amended, the Rivers and Harbors Act of 1899, as amended, the Federal
Water Pollution Control Act, as amended, the Occupational Safety and Health Act
of 1970, as amended, the Resource Conservation and Recovery Act of 1976, as
amended, the Safe Drinking Water Act, as amended, the Toxic Substances Control
Act, as amended, the Superfund Amendments and Reauthorization Act of 1986, as
amended, the Hazardous Materials Transportation Act, as amended, the Texas
Water Code, the Texas Solid Waste Disposal Act, and other environmental
conservation or protection laws.  For purposes of this Agreement, the term
"hazardous material" means (i) any substance which is listed or defined as a
hazardous substance, hazardous constituent, or solid waste





                                       14
<PAGE>   19
pursuant to any Applicable Environmental Laws and (ii) petroleum (including
crude oil and any fraction thereof), natural gas and natural gas liquids.

         5.13    No Brokers.  Except for Simmons & Company International (whose
fee in respect of the transactions contemplated hereby shall be paid solely by
Parent), Seller has not employed or authorized anyone to represent it as a
broker or finder in connection with the transactions contemplated by this
Agreement, and no broker or other person is entitled to any commission or
finder's fee from Seller in connection with such transactions.  Seller agrees
to indemnify and hold harmless Buyer from and against any and all losses,
claims, demands, damages, costs and expenses, including, without limitation,
reasonable attorneys' fees and expenses, Buyer may sustain or incur as a result
of any claim for a commission or fee by a broker or finder acting on behalf of
Seller.

         5.14    Decrees, etc.  Except as set forth on Schedule 5.14, no order,
writ, injunction, decree, judgment, award or determination of any court or
Governmental Entity has been issued or entered against Seller or any of its
Affiliates which continues to be in effect and affects the ownership or
operation of the Purchased Assets.

         5.15    Performance Bonds; Letters of Credit.  Set forth on Schedule
5.15 is a listing of all performance and similar bonds and letters of credit
currently posted by Seller or any of its Affiliates for the purpose of
operating the Rigs.

                                   ARTICLE VI

                    REPRESENTATIONS AND WARRANTIES OF BUYER

         Except as disclosed in this Agreement or in the schedules attached to
this Agreement, Buyer hereby represents and warrants to each of the Sellers as
follows:

         6.1     Organization and Existence.  Buyer is a corporation duly
incorporated, validly existing and in good standing under the laws of the state
of its incorporation, with all necessary corporate power and authority to own
and lease the assets it currently owns and leases and to carry on its business
as such business is currently conducted.  Buyer is duly qualified or licensed
to transact business as a foreign corporation and is in good standing in all
jurisdictions in which the character of the assets currently owned or leased by
it or the nature of the business currently conducted by it requires it so to be
qualified or licensed unless the failure so to qualify or be licensed would not
reasonably be expected to have a material adverse effect on the business or
financial condition of Buyer and its subsidiaries taken as a whole.

         6.2     Authority; Etc.  Buyer has all necessary corporate power and
authority to execute and deliver this Agreement and all agreements, instruments
and documents to be executed and delivered hereunder by Buyer, to consummate
the transactions contemplated hereby and to perform all terms and conditions
hereof to be performed by





                                       15
<PAGE>   20
it.  The execution and delivery of this Agreement by Buyer and all agreements,
instruments and documents to be executed and delivered by Buyer hereunder, the
performance by Buyer of all the terms and conditions hereof to be performed by
it and the consummation of the transactions contemplated hereby have been duly
authorized and approved by the board of directors of Buyer, and no other
corporate proceedings of Buyer are necessary with respect thereto.  All persons
who have executed and delivered this Agreement, and all persons who will
execute and deliver the other agreements, documents and instruments to be
executed and delivered by Buyer hereunder, have been duly authorized to do so
by all necessary actions on the part of Buyer.  This Agreement constitutes, and
each other agreement or instrument to be executed by Buyer hereunder, when
executed and delivered by Buyer, will constitute, the legal, valid and binding
obligation of Buyer, enforceable against it in accordance with its terms,
except to the extent the enforceability hereof and thereof may be limited by
bankruptcy, insolvency, moratorium, reorganization or other laws relating to or
affecting creditors' rights generally or by general principles of equity
(regardless of whether such enforceability is considered in a proceeding in
equity or at law).

         6.3     No Violations.  The execution and delivery of this Agreement
by Buyer, the fulfillment of and compliance by it with the terms and conditions
hereof and the consummation by it of the transactions contemplated hereby will
not:

         (a)     violate any of the terms of the certificate of incorporation
or bylaws of Buyer;

         (b)     result in a breach of or constitute a default under (whether
with notice or the lapse of time or both) any note, bond, mortgage, loan
agreement, indenture or other instrument evidencing borrowed money to which
Buyer is a party or by which Buyer is bound or to which any of its assets is
subject or result in the creation of any Encumbrance on any of its assets,
which breach or default would reasonably be expected to have a material adverse
effect on its ability to perform its obligations hereunder; or

         (c)     to Buyer's knowledge, violate any provision of any law,
statute, rule or administrative regulation or any judgment, order, injunction
or decree of any Governmental Entity applicable to or binding upon Buyer or any
of its subsidiaries, except that no representation is made as to the
application of any United States antitrust law or regulation to the
transactions contemplated by this Agreement, which violation with respect to
the matters specified in clauses (b) and (c) of this Section 6.3 would
reasonably be expected to have a material adverse effect on its ability to
perform its obligations hereunder.

         6.4     Governmental Approval.  Except for required filings under the
HSR Act and as contemplated by Section 9.2 or set forth on Schedule 6.4, no
consent, approval, waiver, order or authorization of, or registration,
declaration or filing with, any Governmental Entity is required to be obtained
or made in connection with the execution





                                       16
<PAGE>   21
and delivery of this Agreement by Buyer or the consummation by Buyer of the
transactions contemplated hereby, the failure of which to obtain would delay or
prevent the consummation of the transactions contemplated by this Agreement.

         6.5     Litigation.  There is no litigation and there are no
Proceedings, suits or investigations pending, instituted or, to the knowledge
of Buyer overtly threatened against Buyer or its subsidiaries that could
reasonably be expected to delay or prevent the consummation of the transactions
contemplated by this Agreement.

         6.6     No Brokers.  Buyer has not employed or authorized anyone to
represent it as a broker or finder in connection with the transactions
contemplated by this Agreement, and no broker or other person is entitled to
any commission or finder's fee from Buyer in connection with such transactions.
Buyer will indemnify and hold harmless Seller from and against any and all
losses, claims, demands, damages, costs and expenses, including, without
limitation, reasonable attorneys' fees and expenses, Seller may sustain or
incur as a result of any claim for a commission or fee by a broker or finder
acting on behalf of Buyer.

         6.7     Certain Knowledge Regarding Assignment of Contracts.  To the
knowledge of Buyer, no condition or circumstance exists that would prevent the
obtainment of any necessary consents to the effective assignment to and
assumption by Buyer of the Drilling Contracts, Other Contracts or Leases.

                                  ARTICLE VII

                    CONDITIONS TO THE OBLIGATIONS OF SELLERS

         The obligations of Sellers to proceed with the Closing contemplated by
this Agreement are subject to the satisfaction, on or before the Closing Date,
of all the following conditions, any one or more of which may be waived, in
whole or in part, by Parent:

         7.1     Accuracy of Representations and Warranties.  Each
representation and warranty of Buyer contained in this Agreement shall be true
and correct in all material respects as of the Closing Date with the same
effect as though made on the Closing Date, except as otherwise specifically
contemplated by this Agreement.

         7.2     Covenants and Agreements Performed.  Buyer shall have complied
on or before the Closing Date in all material respects with each of its
covenants or agreements contained in this Agreement to be performed on or
before the Closing Date.

         7.3     Officer's Certificate.  Seller shall have received a
certificate in the form of Exhibit 7.3 hereto, dated as of the Closing Date, of
the President or a Vice President of Buyer certifying as to the matters
specified in Sections 7.1 and 7.2.





                                       17
<PAGE>   22
         7.4     Legal Opinion.  Seller shall have received from Michael Dundy,
general counsel of Buyer, an opinion dated the Closing Date, substantially in
the form of Exhibit 7.4 hereto.

         7.5     HSR Act.  All required filings under the HSR Act shall have
been made as required and the waiting period (and any extension thereof) under
the HSR Act relating to the transactions contemplated hereby shall have expired
or been terminated without governmental objection thereto.

                                  ARTICLE VIII

                     CONDITIONS TO THE OBLIGATIONS OF BUYER

         The obligations of Buyer to proceed with the Closing contemplated by
this Agreement are subject to the satisfaction, on or before the Closing Date,
of all the following conditions, any one or more of which may be waived, in
whole or in part, by Buyer:

         8.1     Accuracy of Representations and Warranties.  Each
representation and warranty of Sellers contained in this Agreement shall be
true and correct in all material respects as of the Closing Date with the same
effect as though made on the Closing Date, except as otherwise specifically
contemplated by this Agreement.

         8.2     Covenants and Agreements Performed.  Sellers shall have
complied on or before the Closing Date in all material respects with each of
the covenants or agreements of Sellers contained in this Agreement to be
performed on or before the Closing Date.

         8.3     Officer's Certificate.  Buyer shall have received a
certificate in the form of Exhibit 8.3 hereto, dated as of the Closing Date, of
the President or a Vice President of Parent certifying as to the matters
specified in Sections 8.1 and 8.2.

         8.4     Legal Opinion.  Buyer shall have received from Thompson &
Knight, P.C., counsel for Sellers, an opinion dated the Closing Date,
substantially in the form of Exhibit 8.4 hereto.

         8.5     HSR Act.  All required filings under the HSR Act shall have
been made as required and the waiting period (and any extension thereof) under
the HSR Act relating to the transactions contemplated hereby shall have expired
or been terminated without governmental objection thereto.





                                       18
<PAGE>   23
                                   ARTICLE IX

                COVENANTS AND AGREEMENTS OF THE PARTIES BEFORE,
                   RELATING TO AND SUBSEQUENT TO THE CLOSING

         Sellers and Buyer hereby covenant and agree as follows:

         9.1     Expenses.  Except as otherwise expressly provided in this
Agreement, each of the parties hereto shall assume and bear all expenses, costs
and fees incurred or assumed by such party in the preparation and execution of
this Agreement and in compliance with and performance of the agreements and
covenants contained in this Agreement, regardless of whether the transactions
contemplated hereby are consummated.

         9.2     HSR Act Compliance.  The parties shall comply with all
provisions of the HSR Act.  Sellers and Buyer agree to cooperate with each
other and furnish all information to the other party that is necessary in
connection with the HSR Act filings required to be made by the parties hereto.
Buyer and Parent each agree to request early termination of any applicable
waiting period under the HSR Act.

         9.3     Access.  Until the Closing, Sellers shall give the officers,
employees and attorneys of Buyer reasonable access, subject to Applicable Laws,
during normal business hours upon Buyer's reasonable prior notice to Parent, to
the Purchased Assets and the records of Sellers specifically relating thereto.
Sellers will cooperate fully with such representatives of Buyer in connection
with such review.  Buyer will hold in strict confidence and not use for
purposes other than those contemplated by this Agreement any documents or
information furnished concerning Sellers or the Purchased Assets.  Such
confidence shall be maintained for at least two years after the date of this
Agreement.  If the transactions contemplated by this Agreement shall not be
consummated, all such documents and all copies thereof shall immediately
thereafter be returned to Parent, and all documents prepared by Buyer or any of
its Affiliates or their representatives shall be destroyed.  The
confidentiality obligations set forth in the preceding sentence shall not apply
to information (i) in the public domain, (ii) obtained by Buyer from a third
party source with the right to disclose such information or (iii) with respect
to which disclosure is required by law in the opinion of counsel to Buyer
reasonably acceptable to Parent.

         9.4     Conduct of Business and Preservation of Assets.  Until the
Closing, Buyer and Sellers agree to cooperate with each other to effect an
orderly transition of the ongoing operation of the Purchased Assets and Sellers
shall use their respective Best Efforts to preserve, maintain and protect the
Purchased Assets.  From and after the date of this Agreement and until the
Closing Date, without the prior express written consent of Buyer, which consent
shall not be unreasonably withheld or delayed, Sellers will not, and Parent
will not permit any of its Affiliates to, (i) make any material change in the
conduct





                                       19
<PAGE>   24
of the ongoing operation of the Rigs taken as a whole, (ii) enter into any new
drilling contracts with respect to the Rigs or any other contracts or
agreements with respect to the Rigs other than in the ordinary course of
business and only if such contracts are not expected to extend beyond 90 days,
or amend, in any respect adverse to Sellers or Buyer, any Drilling Contract,
Other Contract or Lease, (iii) enter into any footage or turnkey drilling
contracts or (iv) commit itself to do any of the foregoing.

         9.5     Transition of Business Operations.  Buyer will use its Best
Efforts to obtain and to cause any Buyer Designee to obtain prior to the
Closing Date all requisite qualifications or licenses to transact business as a
foreign corporation in each jurisdiction in which the consummation of the
transactions contemplated hereby or the nature of the business to be conducted
by it after the Closing requires it so to be qualified or licensed.  If Buyer
or any Buyer Designee is not so duly qualified or licensed on the Closing Date,
then (i) Buyer agrees to use its Best Efforts to become or to cause each Buyer
Designee to become so qualified or licensed at the earliest practicable date
and (ii) Sellers agree to cooperate with Buyer to effect the consummation of
the transactions contemplated by this Agreement, provided same can be effected
without violation of law in the jurisdiction involved and any additional
expense associated with same is borne by Buyer.

         9.6     Litigation.  Until the Closing, Parent will promptly notify
Buyer of any action, suit, proceeding, claim or investigation which is overtly
threatened or commenced against a Seller which is not fully insured against
(except standard deductible or self-retention amounts) and which relates to or
affects the Purchased Assets or this Agreement or the transactions contemplated
hereby, and Buyer will promptly notify Parent of any action, suit, proceeding,
claim or investigation which is overtly threatened or commenced against Buyer
which is not fully insured against (except standard deductible or self-
retention amounts) and which relates to and materially and adversely affects
Buyer or its business or affects this Agreement or the transactions
contemplated hereby.

         9.7     Certain Taxes.  Buyer shall be liable for and shall pay all
applicable sales, use, transfer, stamp, recording, value added or similar taxes
and assessments resulting from the consummation of the transactions
contemplated hereby, and Buyer and Sellers agree to cooperate to obtain all
available exemptions from such taxes.  All ad valorem taxes, utility and other
service charges and other taxes, fees and expenses relating to the Purchased
Assets (collectively, "Taxes"), for all periods up to and including the Closing
Date shall be the obligations of Sellers and for all periods following the
Closing Date shall be the obligation of Buyer.  All Taxes relating to periods
prior to the Closing that have been assessed prior to Closing and that are not
then being diligently contested in good faith by appropriate proceedings shall
be paid by a Seller prior to the Closing.  Each Seller shall promptly pay from
time to time such Seller's prorated share of all Taxes to Buyer upon Buyer's
request accompanied by appropriate documentation that such Taxes are due and
payable.  Buyer agrees to pay such amounts on behalf of such Seller and to
indemnify such Seller with respect to any Claims (as defined in Section 12.2)
for such Taxes if a Seller shall have paid to Buyer such Seller's pro rata
share thereof, if any.  Sellers





                                       20
<PAGE>   25
and Buyer agree to cooperate with each other in order to reduce the amount of
taxes or other assessments imposed on or charged to any Seller or Buyer as a
result of the consummation of the transactions contemplated by this Agreement;
provided, that neither any Seller nor Buyer shall be obligated to take any
action that it determines in its sole discretion may subject it to additional
taxes, liabilities or expenses.

         9.8     Actions with Respect to Closing.  Each Seller will use its
Best Efforts to obtain and to cause each Seller Designee to obtain the
satisfaction of the conditions to Closing applicable to such Seller set forth
in Article VIII as soon as practicable.  Buyer will use its Best Efforts to
obtain and to cause each Buyer Designee to obtain the satisfaction of the
conditions to Closing applicable to Buyer set forth in Article VII as soon as
practicable.

         9.9     Public Statements.  Prior to making any news release or other
announcement concerning the transactions contemplated hereby, Buyer and Parent
shall consult with each other regarding the proposed contents thereof (but no
approval thereof shall be required).

         9.10    Books and Records.  Sellers shall have the right, at their own
expense, at any time or from time to time within five years after the Closing
Date during reasonable business hours upon reasonable notice to Buyer to
inspect, and make copies of or extracts from, any of the records delivered to
Buyer at the Closing that are in the possession of Buyer or its Affiliates.
None of the records in the possession of Buyer shall be destroyed prior to
December 31, 2001 or five years after generated, whichever is earlier, without
the consent of Parent, unless first reproduced by microfilm or any other
similar process.  In the event that Buyer shall wish to destroy any of such
records at any time or from time to time after the Closing Date, Buyer shall
give not less than 60 days' notice to Parent and Parent shall have the right,
at its own expense, during reasonable business hours to remove such records and
to keep possession of the same.

         9.11    Purchased Asset Loss.  Notwithstanding any other provision of
this Agreement:

         (a)     If any Purchased Asset shall become an actual or constructive
total loss (as determined by Parent's insurance underwriter) prior to the
Closing Date: (i) Buyer shall not be required to purchase such Purchased Asset,
(ii) the Purchase Price shall be reduced by the amount allocated to such
Purchased Asset pursuant to Schedule 3.4, (iii) the term "Purchased Assets"
shall be deemed not to include such Purchased Asset and (iv) the other
provisions of this Agreement shall continue to be in effect and the Closing
shall take place in the manner contemplated herein.

         (b)     Without limiting any Seller's obligations under Section 9.4,
if a Purchased Asset sustains damage not amounting to an actual or constructive
total loss prior to the Closing Date, either (i) the Seller shall repair or
cause to be repaired the damage to the Purchased Asset at such Seller's own
expense or (ii) in the case of damage to a Purchased





                                       21
<PAGE>   26
Asset in respect of which insurance proceeds are available, Buyer, at its
option, may require such Seller to assign to Buyer at the Closing the rights
such Seller has to receive insurance proceeds in respect of such loss or damage
and pay to Buyer the amount by which any such insurance proceeds otherwise
payable to Buyer are reduced by any deductible or deductibles under the terms
of the relevant policy or policies (offset by any amounts paid through the
Closing Date by Seller for such repair), and, in the case of either (i) or (ii)
above, Buyer shall remain obligated to purchase the Purchased Assets on the
Closing Date and the Purchase Price shall not be reduced.  If, pursuant to this
subsection (b), Buyer is to conduct or cause to be conducted repairs to a
damaged Purchased Asset subsequent to Closing, then Parent and Buyer shall
agree on a plan for the manner of conduct and the scope of such repairs, and no
Seller shall be obligated to pay costs resulting from any deviation from such
plan.

         9.12    Use of Name.  Buyer agrees that (i) it will not use the name
"Noble" or "Noble Drilling" or any derivative thereof, and (ii) it will within
five days from the Closing Date, remove from the Purchased Assets or paint over
such name and any logos, symbols or trademarks relating thereto.

         9.13    Continued Effectiveness of Representations and Warranties.
Each Seller and Buyer shall use its Best Efforts to cause the representations
and warranties made by it herein to continue to be true and correct on and as
of the Closing Date as if made on and as of the Closing Date.  Nothing
contained in this Section 9.13 shall be construed as being inconsistent with or
in derogation of Sections 12.1 or 12.5.

         9.14    Performance Bonds; Import Duties.  If a Seller has posted a
performance or other similar bond or letter of credit in connection with such
Seller's ownership or operation of the Rigs or its performance under a Drilling
Contract, Buyer and such Seller shall cooperate with each other in order (i)
for such Seller to obtain the release of any such bond and (ii) to the extent
required, for Buyer to obtain a substitute bond or letter of credit or to
assume such Seller's existing bond.  Sellers and Buyer agree to cooperate with
each other in order to reduce import duties assessed against any Seller or
Buyer as a result of the consummation of the transactions contemplated by this
Agreement, if any, including by postponing the date of transfer of legal title
to any Rig operating in a foreign country until completion of the Drilling
Contract under which such a Rig is operating on the Closing Date; provided,
that neither any Seller nor Buyer shall be obligated to take any action that it
determines in its sole discretion may subject it to additional import duties,
liabilities or expenses.  Buyer shall reimburse a Seller for all costs incurred
by such Seller as a result of such Seller's leaving a performance or similar
bond or letter of credit in place after the Closing Date in order to permit
Buyer to operate the Purchased Assets after the Closing Date.





                                       22
<PAGE>   27
         9.15    Post-Closing Collection, Payment and Administrative
Procedures.  Subsequent to Closing, (i) Buyer agrees to deliver to Parent,
within three Business Days of Buyer's receipt of same, any and all (A) monies
paid to or received by Buyer in respect of amounts due Sellers or their
Affiliates, including, but not limited to, payment of receivables, refunds,
rebates, release of performance or similar bonds or letters of credit, and (B)
inquiries, correspondence or documents received by Buyer related to such
amounts; and (ii) Sellers agree to deliver to Buyer, within three Business Days
of Sellers' receipt of same, any and all (A) monies paid to or received by
Sellers in respect of amounts due Buyer or any of Buyer's Affiliates,
including, but not limited to, payment of receivables, refunds, rebates,
release of performance or similar bonds or letters of credit, and (B)
inquiries, correspondence or documents received by Sellers related to such
amounts.

         9.16    Removal of Certain Purchased Assets.  Certain items of
Inventory are currently stored at the Triton Tool and Supply, Inc. facility
located at 11917 FM 529 in Houston, Texas, which items are noted on Schedule
2.1(c).  As soon as practicable, and in any event within 120 days following the
Closing Date, Buyer will move such items of Inventory off the premises at
Buyer's expense.  Sellers agree to cooperate with Buyer in scheduling such
removal.

                                   ARTICLE X

                                   EMPLOYEES

         10.1    Employees.

         (a)     For the purposes of this Agreement, "Employees" shall mean the
employees of Sellers or any of their Affiliates listed on Schedule 10.1(a).
Schedule 10.1(a) sets forth a list of the names, positions and salaries or
hourly rates, as applicable, of the Employees as of the date hereof.  At the
Closing, Seller shall deliver to Buyer a revised Schedule 10.1(a) updating such
information as of the Closing Date.

         (b)     Immediately following the Closing Date, Buyer shall offer
employment to all Employees at salaries or hourly rates at least equal to the
salaries or hourly rates payable to Buyer's employees in similar jobs and
locations.  Employees who are hired by Buyer or an Affiliate of Buyer will have
the same rights to retaining their jobs in a layoff and rights of recall from
layoff as exist for Buyer's other employees of like job status and service.





                                       23
<PAGE>   28
         (c)     Immediately following the Closing Date, Buyer shall provide
all Employees hired by Buyer or its Affiliates with employee benefits under
employee benefit plans which are no less favorable than the employee benefits
provided for Buyer's or its subsidiaries' employees and former employees as of
the date hereof.  Under such benefit plans, programs and arrangements, (i)
service with Sellers and any of their Affiliates shall be counted for purposes
of determining (A) any period of eligibility to participate or to vest in
benefits, including vacation rights, and (B) the amount or accrual of benefits
under such plans, programs and arrangements, and (ii) any amounts previously
expended by the Employees for purposes of satisfying deductibles under any
medical or dental plans of Sellers or any of their Affiliates for the
applicable current plan year shall be credited for purposes of satisfying any
deductibles under Buyer's or its subsidiaries' plans and any prior years of
service for preexisting condition limitations shall be credited to the
Employees upon admittance into any health benefits plan, program or arrangement
maintained by Buyer or its subsidiaries.  Employees shall be eligible for 1996
vacations based on Buyer's general policies with no waiting period (offset by
any vacations taken in 1996 prior to the Closing Date).

                                   ARTICLE XI

                                  TERMINATION

         11.1    Termination.  This Agreement may be terminated and the
transactions contemplated hereby may be abandoned at any time prior to the
Closing:

         (a)     by mutual written consent of Buyer and Parent;

         (b)     by either Buyer or Parent, if there shall be any statute, rule
or regulation that makes consummation of the transactions contemplated hereby
illegal or otherwise prohibited or a Governmental Entity shall have issued an
order, decree or ruling or taken any other action permanently restraining,
enjoining or otherwise prohibiting the consummation of the transactions
contemplated hereby, and such order, decree, ruling or other action shall have
become final and nonappealable;

         (c)     by Buyer, if

                 (i)      the Closing shall not have occurred by January 31,
         1997 (provided that the right to terminate this Agreement under this
         clause (i) shall not be available to Buyer if Buyer's failure to
         fulfill any of its obligations under this Agreement or its
         misrepresentation or breach of warranty hereunder has been the sole
         cause thereof); or

                 (ii)     there has been a material breach by any Seller of any
         covenant or agreement, or a material inaccuracy of any representation
         or warranty of any Seller, contained in this Agreement which has
         rendered the satisfaction of any





                                       24
<PAGE>   29
         condition to the obligations of Buyer impossible and such breach or
         inaccuracy has not been cured by any Seller within five Business Days
         after Parent's receipt of notice thereof from Buyer, or waived by
         Buyer; or

         (d)     by Parent, if

                 (i)      the Closing shall not have occurred by January 31,
         1997 (provided that the right to terminate this Agreement under this
         clause (i) shall not be available to Parent if Sellers' failure to
         fulfill any of their obligations under this Agreement or their
         misrepresentation or breach of warranty hereunder has been the sole
         cause thereof); or

                 (ii)     there has been a material breach by Buyer of any
         covenant or agreement, or a material inaccuracy of any representation
         or warranty of Buyer, contained in this Agreement which has rendered
         the satisfaction of any condition to the obligations of Sellers
         impossible and such breach or inaccuracy has not been cured by Buyer
         within five Business Days after Buyer's receipt of notice thereof from
         any Seller, or waived by Parent.

         11.2    Effect of Termination.  In the event of the termination of
this Agreement pursuant to Section 11.1 by Buyer or Parent, written notice
thereof shall forthwith be given to the other party specifying the provision
hereof pursuant to which such termination is made, and this Agreement shall
become void and have no effect, and, other than as set forth in Section 3.2
with regard to Sellers' right to receive the Deposit as liquidated damages,
there shall be no liability hereunder on the part of Buyer or Seller or any of
their respective directors, officers, employees, stockholders or
representatives, except that the agreements contained in this Section 11.2 and
in Article XII and Sections 5.13, 6.6, 9.1 and 9.3 shall survive the
termination hereof.  Nothing contained in this Section 11.2 shall relieve any
party from liability for damages actually incurred (excluding consequential
damages) for breach of any covenant or agreement, or for the inaccuracy of any
representation or warranty, contained herein.





                                       25
<PAGE>   30
                                  ARTICLE XII

                    EXTENT AND SURVIVAL OF REPRESENTATIONS,
                      WARRANTIES, COVENANTS AND AGREEMENTS

         12.1    Scope of Representations of Sellers.  Except as and to the
extent set forth in Article V, Sellers make no other representations or
warranties, and disclaim all liability and responsibility for any
representation, warranty, statement or information made or communicated (orally
or in writing) to Buyer (including, but not limited to, any opinion,
information, projection or advice that may have been provided to Buyer by any
officer, director, employee, agent, consultant or representative of Sellers, or
any Affiliate thereof, including without limitation, Simmons & Company
International or Sellers' counsel).  WITHOUT LIMITING THE GENERALITY OF THE
FOREGOING, SELLERS MAKE NO REPRESENTATION OR WARRANTY, EITHER EXPRESS OR
IMPLIED, AS TO (A) THE CONTENTS OF THE DESCRIPTIVE MEMORANDUM DATED AUGUST
1996, RELATING TO "THE LAND DRILLING DIVISION OF NOBLE DRILLING CORPORATION",
(B) THE MAINTENANCE, REPAIR, CONDITION, DESIGN, WORKMANSHIP, SUITABILITY,
UTILITY OR MARKETABILITY OF THE RIGS OR OTHER PURCHASED ASSETS OR ANY PORTION
THEREOF OR PROPERTY THEREON OR THE ABSENCE OF ANY DEFECTS THEREIN, WHETHER
LATENT OR PATENT, OR (C) ANY OTHER MATERIALS OR INFORMATION THAT MAY HAVE BEEN
MADE AVAILABLE OR COMMUNICATED TO BUYER OR ITS AGENTS, CONSULTANTS OR
REPRESENTATIVES IN CONNECTION WITH THE TRANSACTIONS CONTEMPLATED BY THIS
AGREEMENT OR ANY DISCUSSION OR PRESENTATION RELATING THERETO, INCLUDING,
WITHOUT LIMITATION, ANY IMPLIED OR EXPRESS WARRANTY OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE, IT BEING THE EXPRESS AGREEMENT OF BUYER AND
SELLERS THAT EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, BUYER WILL OBTAIN
RIGHTS IN THE PURCHASED ASSETS IN THEIR PRESENT CONDITION AND STATE OF REPAIR,
"AS IS" AND "WHERE IS" AND "WITH ALL FAULTS."  Buyer acknowledges and affirms
that it will have had the opportunity to complete its own independent
investigation, analysis and evaluation of the Purchased Assets, that it has
been afforded the opportunity to inspect the Purchased Assets, that in making
its decision to enter into this Agreement and to consummate the transactions
contemplated hereby it has relied solely on its own independent investigation,
analysis and evaluation of the Purchased Assets and on the express
representations and warranties by Sellers made in Article V hereof as a basis
for entering into this Agreement, and that it has made all such reviews and
inspections of the foregoing as it has deemed necessary or appropriate.

         12.2    Indemnification by Parent.  With respect only to the
representations, warranties, covenants and agreements made herein that,
pursuant to Section 12.5, shall survive after the Closing Date, Parent agrees
to reimburse Buyer for, and indemnify and hold Buyer harmless from, any losses,
liabilities, claims, demands, damages (excluding





                                       26
<PAGE>   31
consequential damages), costs or expenses (including reasonable attorneys'
fees) of every kind, nature and description (collectively, "Claims") sustained
by Buyer arising out of or resulting from any inaccuracy in or breach of any of
the representations, warranties, covenants or agreements made by Sellers
herein; provided, however, that Parent shall have no liability pursuant to this
Section 12.2 for the first $100,000 of aggregate Claims incurred by Buyer (the
"Buyer Basket") and Parent shall be responsible only for such amounts or such
Claims as exceed the Buyer Basket; and provided further, however, that the
aggregate of all Claims for which Buyer is entitled to reimbursement hereunder
shall not exceed the Purchase Price.

         12.3    Indemnification by Buyer.  Subject to Section 12.5, Buyer
hereby agrees to reimburse Sellers for, and indemnify and hold Sellers harmless
from, any Claims sustained by Sellers arising out of or resulting from (i) any
inaccuracy in or breach of any of the representations, warranties, covenants or
agreements made by Buyer herein or (ii) except to the extent Buyer is entitled
to indemnification from Parent in respect of any Sellers' breach of the
representations and warranties of Sellers set forth in Section 5.12, damage to
the environment, environmental cleanup, remediation or compliance, or for any
other relief, arising directly or indirectly from or incident to, the use,
occupation, operation, maintenance or condition (whether latent or patent) of
any of the Purchased Assets, including without limitation, contamination of the
property or premises with Naturally Occurring Radioactive Materials (NORM),
whether or not any such Claims result from conditions, actions or inactions
present or existing on or before the Closing (collectively, "Environmental
Claims"); provided, however, that Buyer shall have no liability pursuant to
this Section 12.3 for the first $100,000 of aggregate Claims incurred by
Sellers (the "Seller Basket") and Buyer shall be responsible only for such
amounts of such Claims as exceed the Seller Basket; and provided further,
however, that the aggregate of all Claims for which Sellers are entitled to
reimbursement hereunder shall not exceed the Purchase Price.

         12.4    Indemnification Procedure.  Any party seeking information or
reimbursement for Claims hereunder (the "Indemnified Party") shall notify the
party from which such indemnification is sought (the "Indemnifying Party")
within 45 Business Days of the assertion of any Claim or discovery of any fact
(which fact has been brought to the attention of a responsible executive
officer of the Indemnified Party) upon which the Indemnified Party intends to
base a claim for indemnification or reimbursement hereunder.  The failure of
the Indemnified Party so to notify the Indemnifying Party shall relieve the
Indemnifying Party from any liability under this Agreement to the Indemnifying
Party with respect to such claim for indemnification or reimbursement.  In the
event of any claims for indemnification or reimbursement, the Indemnifying
Party, at its option, may assume (with legal counsel reasonably acceptable to
the Indemnified Party) the defense of any claim, demand, lawsuit or other
proceeding brought against the Indemnified Party, which claim, demand, lawsuit
or other proceeding may give rise to the indemnity or reimbursement obligation
of the Indemnifying Party hereunder, and may assert any defense of any party;
provided, however, that the Indemnified Party shall have





                                       27
<PAGE>   32
the right at its own expense to participate jointly with the Indemnifying Party
in the defense of any claim, demand, lawsuit or other proceeding in connection
with which the Indemnified Party claims indemnification or reimbursement
hereunder.  Notwithstanding the right of the Indemnified Party so to
participate, the Indemnifying Party shall have the sole right to settle or
otherwise dispose of such claim, demand, lawsuit or other proceeding on such
terms as the Indemnifying Party, in its sole discretion, shall deem appropriate
with respect to any issue involved in such claim, demand, lawsuit or other
proceeding as to which (i) the Indemnifying Party shall have acknowledged the
obligation to indemnify the Indemnified Party hereunder, or (ii) the
Indemnified Party shall have declined so to participate; provided, however,
that no such Claim shall be settled by the Indemnifying Party in any manner
that could reasonably be expected to have a material adverse effect on the
business of the Indemnified Party and its subsidiaries, taken as a whole,
without the prior written consent of the Indemnifying Party.

         12.5    Survival.  The representations, warranties, covenants and
agreements set forth in this Agreement and in any certificate or instrument
delivered in connection herewith shall terminate upon Closing, following which
no party may bring any action or present any claim for the inaccuracy or breach
of such representations, warranties, covenants and agreements, except that the
representations, warranties, covenants and agreements set forth in Sections
3.2, 3.4, 5.1, 5.2, 5.12, 5.13, 6.1, 6.2, 6.6, 9.1, 9.3, 9.5, 9.7, 9.9, 9.10,
9.11, 9.12, 9.14, 9.15, 9.16 and 11.2 and Articles II, VII, VIII, X and XIII
and in the General Assignment and the Deeds shall survive the Closing Date.

         12.6    Tax Benefits; Insurance Proceeds.  In determining the amount
of any Claim, for which any party is entitled to reimbursement under Article
XII of this Agreement, the gross amount thereof will be reduced by any
correlative net tax benefit or insurance proceeds realized or to be realized by
such party and such correlative insurance benefit shall be net of any insurance
premium that becomes due as a result of such claim.

         12.7    Applicability of Indemnification Obligation.  EACH OF THE
AGREEMENTS TO INDEMNIFY, DEFEND OR HOLD HARMLESS CONTAINED IN SECTION 12.2 OR
12.3 SHALL APPLY IRRESPECTIVE OF WHETHER THE SUBJECT CLAIM IS BASED IN WHOLE OR
IN PART UPON THE SOLE OR CONTRIBUTORY NEGLIGENCE (WHETHER ACTIVE, PASSIVE OR
GROSS), BREACH OF WARRANTY, OR BREACH OR VIOLATION OF ANY DUTY IMPOSED BY ANY
LAW OR REGULATION, ON THE PART OF THE BENEFICIARY OF THE AGREEMENT, EXCEPT AS
OTHERWISE EXPRESSLY PROVIDED IN THIS AGREEMENT.





                                       28
<PAGE>   33
                                  ARTICLE XIII

                                 MISCELLANEOUS

         13.1    Notices.  All notices and other communications required or
permitted to be given or made hereunder by either party hereto shall be in
writing and shall be deemed to have been duly given if delivered personally or
transmitted by first class registered or certified mail, postage prepaid,
return receipt requested, or sent by prepaid overnight delivery service, or
sent by cable, telegram, telefax or telex, to the parties at the following
addresses (or at such other addresses as shall be specified by the parties by
like notice):

                 If to Buyer:

                          Nabors Industries, Inc.
                          515 West Greens Road
                          Suite 1200
                          Houston, Texas  77067-4525
                          Attention:  Richard A. Stratton
                                      Vice Chairman
                          Telephone:  (713) 775-8033
                          Facsimile:  (713) 775-8002

                 If to Sellers:

                          Noble Drilling Corporation
                          10370 Richmond Avenue
                          Suite 400
                          Houston, Texas  77042
                          Attention:  James C. Day, Chairman, President and
                                      Chief Executive Officer
                          Telephone:  (713) 974-3131
                          Facsimile:  (713) 953-1126
                                      
                 with a copy to:

                          Thompson & Knight, P.C.
                          1700 Pacific Avenue
                          Suite 3300
                          Dallas, Texas  75201
                          Attention:  Robert D. Campbell
                          Telephone:  (214) 969-1353
                          Facsimile:  (214) 969-1751





                                       29
<PAGE>   34
         Such notices, demands and other communications shall be effective (i)
if delivered personally or sent by courier service, upon actual receipt by the
intended receipt, (ii) if mailed, upon the earlier of five days after deposit
in the mail or the date of delivery as shown by the return receipt therefor, or
(iii) if sent by telecopy or facsimile transmission, when confirmation of
receipt is received.

         13.2    Entire Agreement.  This Agreement, including the Schedules,
Exhibits, Annexes and other writings referred to herein or delivered pursuant
hereto, constitutes the entire agreement between the parties hereto with
respect to the subject matter hereof and supersedes all prior agreements and
understandings, both written and oral, between the parties with respect to the
subject matter hereof.

         13.3    Amendments and Waiver; Rights and Remedies.  This Agreement
may be amended, superseded, cancelled, renewed or extended, and the terms
hereof may be waived, only by a written instrument signed by the parties or, in
the case of a waiver, by the party waiving compliance.  No delay on the part of
either party in exercising any right, power or privilege hereunder shall
operate as a waiver thereof, nor shall any waiver on the part of either party
of any such right, power or privilege, or any single or partial exercise of any
such right, power or privilege, preclude any further exercise thereof or the
exercise of any other such right, power or privilege.  The rights and remedies
herein provided are cumulative and are not exclusive of any rights or remedies
that any party may otherwise have at law or in equity.  The rights and remedies
of either party based upon, arising out of or otherwise in respect of any
inaccuracy in or breach of any representation, warranty, covenant or agreement
contained in this Agreement shall in no way be limited by the fact that the
act, omission, occurrence or other state of facts upon which any claim of any
such inaccuracy or breach is based may also be the subject matter of any other
representation, warranty, covenant or agreement contained in this Agreement (or
in any other agreement between the parties) as to which there is no inaccuracy
or breach.

         13.4    Governing Law.  This Agreement shall be governed by, and
construed and enforced in accordance with, the laws of the State of Texas,
without regard to the principles of conflicts of laws thereof.

         13.5    Binding Effect; Assignment.

         (a)     This Agreement and all the provisions hereof shall be binding
upon and inure to the benefit of the parties and their respective successors
and permitted assigns, and all future conveyances of all or any portion of the
Real Property shall expressly recognize and perpetuate the rights and
obligations set out in this Agreement; provided, however, that neither this
Agreement nor any of the rights, interests or obligations hereunder shall be
assigned by either of the parties hereto (by operation of law or otherwise)
without the prior written consent of the other party, except as provided in
subsection (b) below.





                                       30
<PAGE>   35
         (b)     (i)      Sellers may upon notice to Buyer cause one or more of
         Parent's wholly owned subsidiaries (direct or indirect) (a "Seller
         Designee") to purchase any or all of the Purchased Assets from a
         Seller in order to allow such Seller Designee to become a transferor
         of such Purchased Assets hereunder; provided, however, that (y) each
         Seller Designee shall be made a party to this Agreement at or prior to
         the Closing and (z) no such designation shall relieve any Seller of
         any of its duties, liabilities or obligations hereunder.

                 (ii)     Buyer may upon notice to Sellers direct that title to
         all or part of the Purchased Assets be taken in one or more of Buyer's
         wholly owned subsidiaries (direct or indirect) (a "Buyer Designee");
         provided, however, that (y) each Buyer Designee shall be made a party
         to this Agreement at or prior to the Closing and (z) no such
         designation shall relieve Buyer of any of its duties, liabilities or
         obligations hereunder.

         13.6    Counterparts.  This Agreement may be executed simultaneously
in two or more counterparts, each of which shall be deemed an original, but all
of which together shall constitute one and the same agreement.

         13.7    References.  All references in this Agreement to Articles,
Sections and other subdivisions refer to the Articles, Sections and other
subdivisions of this Agreement unless expressly provided otherwise.  The words
"this Agreement," "herein," "hereof," "hereby," "hereunder" and words of
similar import refer to this Agreement as a whole and not to any particular
subdivision unless expressly so limited.

         13.8    Severability of Provisions.  If any provision of this
Agreement is held to be unenforceable, this Agreement shall be considered
divisible and such provision shall be deemed inoperative to the extent it is
deemed unenforceable, and in all other respects this Agreement shall remain in
full force and effect; provided, however, that if any such provision may be
made enforceable by limitation thereof, then such provision shall be deemed to
be so limited and shall be enforceable to the maximum extent permitted by
applicable law.

         13.9    Gender.  Pronouns in masculine, feminine and neuter genders
shall be construed to include any other gender, and words in the singular form
shall be construed to include the plural and vice versa, unless the context
otherwise requires.

         13.10   Descriptive Headings.  The descriptive headings herein are
inserted for convenience of reference only, do not constitute a part of this
Agreement, and shall not affect in any manner the meaning or interpretation of
this Agreement.





                                       31
<PAGE>   36
         IN WITNESS WHEREOF, the parties have caused this Agreement to be
executed by their respective officers hereunto duly authorized as of the date
first above written.


                                      NABORS INDUSTRIES, INC.



                                      By:                                       
                                         ---------------------------------------
                                         Eugene M. Isenberg, Chairman and
                                         Chief Executive Officer



                                      NOBLE DRILLING CORPORATION



                                      By:                                       
                                         ---------------------------------------
                                         James C. Day, Chairman, President and
                                         Chief Executive Officer



                                      NOBLE PROPERTIES, INC.



                                      By:                                       
                                         ---------------------------------------
                                         Byron L. Welliver, President



                                      NOBLE DRILLING (CANADA) LTD.



                                      By:                                       
                                         ---------------------------------------
                                         James C. Day, President





                                       32
<PAGE>   37
                        INDEX TO SCHEDULES AND EXHIBITS

<TABLE>
<CAPTION>
Schedule
Number                            Description                                   
- ------                    ------------------------------------------------------
<S>                       <C>
2.1(a)                    Marketed Rigs
2.1(b)                    Stacked Rigs
2.1(c)                    Inventory
2.1(d)(i)                 Leases
2.1(d)(ii)                Real Property
2.1(e)(ii)                Permits
2.1(f)(i)                 Drilling Contracts
2.1(f)(ii)                Other Contracts
2.5(b)                    Engineering Drawings, etc.
3.4                       Allocation of Purchase Price
5.6                       Seller's Defaults
5.7(a)                    Seller's Litigation
5.7(b)                    Seller's Governmental Notifications
5.8                       Seller's Governmental Approvals
5.9                       Seller's Compliance With Laws
5.14                      Seller's Decrees, etc.
5.15                      Seller's Performance Bonds; Letters of Credit
6.4                       Buyer's Governmental Approvals
10.1(a)                   Employees

Exhibit
Number
- ------

2.4                       Form of Agreement Regarding Nonassigned Contracts
3.1(a)                    Form of Escrow Agreement
4.2(a)                    Form of General Assignment
4.2(d)                    Form of Deed
7.3                       Form of Buyer's Officer's Certificate
7.4                       Buyer's Opinion of Counsel
8.3                       Form of Sellers' Officer's Certificate
8.4                       Sellers' Opinion of Counsel
</TABLE>





                                       33
<PAGE>   38
                                                              SCHEDULE 2.1(D)(I)


                                     LEASES


1.*      Lease Agreement dated March 1, 1992 between Jaygee Brothers and Noble
         Drilling (U.S.) Inc. relating to yard in Evanstan, Wyoming.

2.*      Lease Agreement dated February 20, 1996 between Blackhills Trucking
         and Noble Drilling (U.S.) Inc. relating to yard in Williston, North
         Dakota.

3.       Lease Amendment Agreement dated May 17, 1994 between Pensionfund
         Properties Limited and Noble Drilling (Canada) Ltd. relating to office
         in Calgary, Alberta.





- ---------------

*        This lease is currently held by Noble Drilling (U.S.) Inc., an
         Affiliate of Parent.  Before Closing, either this lease will be
         assigned to a Seller or Noble Drilling (U.S.) Inc. will become a party
         to the Agreement.
<PAGE>   39
                                                             SCHEDULE 2.1(D)(II)


                                 REAL PROPERTY

Breen Road facility:      14.9965 acres of land (called 15.0000 acres) being
                          part of a called 37.725 acre tract in a called 450
                          acre tract, lying in the James Clarkson Survey,
                          Abstract No. 188, Harris County, Texas, as recorded
                          in Volume 971, Page 374 of the Deed Records of Harris
                          County, Texas, said 14.9965 acres.


Shreveport yard:          Block 35, Manchester Subdivision, a subdivision in
                          Caddo Parish, Louisiana, as per plat recorded in
                          Block 150, pages 376 and 377 of the Conveyance
                          Records of Caddo Parish, Louisiana, together with all
                          of Overdyke Avenue, lying to the East of Block 35,
                          Manchester Subdivision and together with KCS Railway
                          right-of-way running across the herein-described
                          property as abandoned in the records of Caddo Parish,
                          Louisiana (also described as Northeast Corner of
                          Pullerton and McClelland).

Oklahoma City facility:   A part of the Northeast Quarter (NE/4) of Section 35,
                          Township 12 North, Range 5 West of the Indian
                          Meridian, Canadian County, Oklahoma, subject to that
                          certain Reciprocal Easement Agreement dated April 14,
                          1992 by and between Noble Drilling Corporation and C
                          K Investment Corp.

Nisku facility:           Plan 862 2163; Block (A); Containing 15.204 hectares
                          (37.57 Acres) more or less; (N.W. 19-50-24-W4);
                          Excepting thereout all mines and minerals.
<PAGE>   40
                                                                    SCHEDULE 5.6


                               SELLER'S DEFAULTS




None.
<PAGE>   41
                                                                 SCHEDULE 5.7(A)


                              SELLER'S LITIGATION




None.
<PAGE>   42
                                                                 SCHEDULE 5.7(B)


                      SELLER'S GOVERNMENTAL NOTIFICATIONS




None.
<PAGE>   43
                                                                    SCHEDULE 5.8


                        SELLER'S GOVERNMENTAL APPROVALS




None.
<PAGE>   44
                                                                    SCHEDULE 5.9


                         SELLER'S COMPLIANCE WITH LAWS




None.
<PAGE>   45
                                                                   SCHEDULE 5.14


                             SELLER'S DECREES, ETC.




None.
<PAGE>   46
                                                                   SCHEDULE 5.15


                 SELLER'S PERFORMANCE BONDS; LETTERS OF CREDIT




None.
<PAGE>   47
                                                                 SCHEDULE 5.7(B)


                      SELLER'S GOVERNMENTAL NOTIFICATIONS




None.
<PAGE>   48
                                                                    SCHEDULE 6.4


                         BUYER'S GOVERNMENTAL APPROVALS




None.

<PAGE>   1
                                                                     EXHIBIT 13


                                                              NABORS INDUSTRIES

                                                             1996 ANNUAL REPORT

                                    [PHOTO]
<PAGE>   2
                                    [PHOTO]

<PAGE>   3
                                    [PHOTO]




REVENUES


<PAGE>   4

                                    [CHART]

REVENUES
<PAGE>   5
                                    [PHOTO]



OPERATING INCOME (LOSS)

<PAGE>   6

                                    [CHART]

OPERATING INCOME (LOSS)
<PAGE>   7
                                    [PHOTO]



STOCKHOLDERS' EQUITY (DEFICIT)
<PAGE>   8

                                    [CHART]


STOCKHOLDERS' EQUITY (DEFICIT)
<PAGE>   9
FINANCIAL HIGHLIGHTS                    NABORS INDUSTRIES, INC. AND SUBSIDIARIES
(In thousands, except per share amounts)

<TABLE>
<CAPTION>
                                                                    Year Ended September 30,
OPERATING DATA            1996       1995       1994       1993       1992       1991       1990       1989       1988       1987
                        --------   --------   --------   --------   --------   --------   --------   --------   --------   --------
<S>                     <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>     
Revenues                $719,743   $572,788   $484,268   $419,406   $312,407   $264,239   $153,920   $ 85,600   $ 63,060   $ 33,126
Depreciation and
  amortization            46,117     31,042     26,241     22,434     16,526     10,119      5,232      3,884      3,502      5,855
Operating income (loss)   77,099     58,555      9,299     38,257     34,705     30,324     14,383      5,346        403    (72,790)
Net income (loss)         70,500     51,104      1,350     38,558     33,740     29,724     16,401      7,165     23,522    (84,953)
Net income (loss)
  per share - primary   $    .76   $    .58   $    .02   $    .50   $    .46   $    .42   $    .27   $    .14   $    .85   $  (5.90)
Weighted average
  number of shares        93,162     88,018     85,620     77,806     74,037     70,395     61,143     51,644     27,671     14,403
                        --------   --------   --------   --------   --------   --------   --------   --------   --------   --------
</TABLE>

<TABLE>
<CAPTION>
                                                                      As of September 30,
BALANCE SHEET DATA        1996       1995       1994       1993       1992       1991       1990       1989       1988       1987
                        --------   --------   --------   --------   --------   --------   --------   --------   --------   --------
<S>                     <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>     
Cash and short-term
  marketable securities $104,027   $ 15,334   $ 45,232   $ 70,458   $ 14,783   $ 15,139   $ 29,332   $  6,484   $ 13,354   $  6,509
Working capital          172,091     33,892     77,248    113,653     33,831     15,650     40,956      7,784      8,678      4,433
Property, plant and
  equipment, net         511,203    393,464    283,141    270,865    220,761    185,543    109,928     42,728     28,357     36,435
Total assets             871,274    593,272    490,273    493,927    339,930    285,615    226,846     75,519     61,123     54,086
Long-term obligations    229,504     51,478     61,879     73,109     49,294     37,489     37,729      7,760      4,254     65,864
Stockholders' equity
  (deficit)              457,822    368,750    317,424    307,583    201,058    157,302    117,335     47,215     36,101    (26,787)
Capital expenditures
  and acquisitions       174,483    144,560     62,907     84,752     61,124     88,104     73,943     19,751      7,414      3,248
                        --------   --------   --------   --------   --------   --------   --------   --------   --------   --------
</TABLE>

<TABLE>
<CAPTION>
                                                                    Year Ended September 30,
GEOGRAPHIC DISTRIBUTION   1996       1995       1994       1993       1992       1991       1990       1989       1988       1987
                        --------   --------   --------   --------   --------   --------   --------   --------   --------   --------
<S>                     <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>     
Revenues
  North America         $532,638   $416,475   $323,149   $235,716   $147,506   $165,438   $101,335   $ 67,888   $ 63,060   $ 33,126
  International          187,105    156,313    161,119    183,690    164,901     98,801     52,585     17,712       --         --
                        --------   --------   --------   --------   --------   --------   --------   --------   --------   --------
                        $719,743   $572,788   $484,268   $419,406   $312,407   $264,239   $153,920   $ 85,600   $ 63,060   $ 33,126
                        --------   --------   --------   --------   --------   --------   --------   --------   --------   --------
Operating income (loss)
  North America         $ 61,611   $ 47,989   $ 35,246   $ 26,092   $ 12,618   $ 15,119   $  9,422   $  9,116   $  4,390   $(70,311)
  International           27,848     20,293    (14,663)    23,091     35,111     27,527     13,640        609       --         --
  Corporate              (12,360)    (9,727)   (11,284)   (10,926)   (13,024)   (12,322)    (8,679)    (4,379)    (3,987)    (2,479)
                        --------   --------   --------   --------   --------   --------   --------   --------   --------   --------
                        $ 77,099   $ 58,555   $  9,299   $ 38,257   $ 34,705   $ 30,324   $ 14,383   $  5,346   $    403   $(72,790)
                        --------   --------   --------   --------   --------   --------   --------   --------   --------   --------
</TABLE>

                                      1
<PAGE>   10
TO OUR SHAREHOLDERS

     Fiscal 1996 was a year of financial and operational achievements that
established a framework for an even brighter future. Many important measures of
financial performance demonstrated solid growth. Revenues, operating income,
net income and cash flow from operations all showed good improvement and our
return on equity exceeded 17 percent.

     These improvements in our results came from a combination of capital
investments, continuing cost control and a market environment that improved as
the year progressed. Initial yields from recent investments in new offshore
platform rigs in our Sundowner subsidiary and acquisitions in Alaska and the US
Lower 48 constituted the largest component. The additional sales of top drives
made possible by our expanded CANRIG manufacturing capacity also contributed
significantly. Higher utilization and better pricing of our platform drilling
and workover jackup rigs became increasingly apparent in our results as the
year progressed. A significant increase came from our US Lower 48 operations
through the incremental effects of alliances and lower costs.

     In many ways fiscal 1996 further validated the philosophy that has
governed our approach during the past ten years. The principal elements of that
philosophy are:

     ESTABLISH AND MAINTAIN A CONSERVATIVE AND FLEXIBLE FINANCIAL POSTURE.
Financial strength and flexibility have been vital to our success. Our
financial posture has been consistently strong and conservative and we are
committed to further enhancing our standing with the credit markets. That
became even more evident in 1996 when we achieved the distinction of being the
first drilling company since the early 1980s to obtain an investment grade
credit rating. This rating and our positive outlook combined to generate
significant appeal to debt investors enabling us to complete a very successful
$172.5 million convertible debt offering during the third fiscal quarter. The
proceeds together with our internal cash generation and short-term borrowing
capacity place us in an even more favorable position to capitalize on
opportunities as they arise.

     BUILD A DIVERSE PORTFOLIO OF MARKET POSITIONS TO MITIGATE RISK AND CREATE
POTENTIAL FOR GROWTH. Nabors has evolved from a relatively obscure Canadian and
Alaskan contractor into a global leader in land drilling and offshore platform
drilling and workover operations. Geographic and market segment diversity have
allowed the Company to achieve steady growth in spite of occasional adverse
market developments in one or more areas. We strive to develop leading market
positions in long-term markets where we can achieve 

                                      2
<PAGE>   11

                                    [PHOTO]
<PAGE>   12

sustainable competitive advantages. Achieving these positions requires
recognizing opportunities and capitalizing upon them as they arise. Our growth
in the US Lower 48 market is a good example. Here we were able to make
acquisitions that gave us a strong position in the market, then obtain
profitability through economies of scale at a time when most people thought it
was impossible to do so.

     The addition of Sundowner two years ago is a different example of this
diversification and expansion strategy. It has since provided not only a new
market segment, but also a number of new investment and growth opportunities
that are only partially reflected in this year's results. Similarly, the
expansion of our top drive manufacturing subsidiary, CANRIG and the recent
acquisition of EPOCH Well Logging, Inc. have enhanced the Company's drilling
technology capability. Conversely, due to the lack of significant upside
potential, we divested our UK North Sea operations so as to employ the capital
and management talent in that unit more productively in other core areas.

     FORGE LONG-TERM RELATIONSHIPS WITH CUSTOMERS. Nabors strives to build
long-term and mutually beneficial relationships with our customers in each of
the markets in which we operate. In the process many of these relationships
have evolved into alliances both formal and informal. These range from
traditional day-work with and without performance incentives to sole-source
supplier arrangements to comprehensive planning and execution of the drilling
of a customer's well.

     BUILD A CADRE OF TALENTED AND EXPERIENCED PEOPLE. Nabors has always
possessed a group of capable people with extensive experience. As we have
acquired companies, we have inherited many different organizational styles and
cultures. Successfully integrating these various cultures into one homogenous
group with high standards of quality and productivity has been a challenge and
a key element in our success. Developing and retaining talented and experienced
people at all levels of our organization has been and continues to be a
priority.

     GROW AND REMAIN PROFITABLE IN ANY MARKET ENVIRONMENT. Nabors has been able
to achieve substantial growth and profitability in a very difficult market
environment. In fact, most of our investments during the last decade were made
at a time when few others were willing to invest in the land drilling business.
This period was characterized by a steady decline in the US land drilling rig
count. During calendar year 1995, 

                                      3
<PAGE>   13

which included our first fiscal quarter of 1996, it reached its lowest yearly
average since World War II. Against this backdrop, Nabors not only saw its
results improve, but was able to continue to invest in acquisitions, new rigs
and the expansion of CANRIG, thus fostering our growth in 1996 and beyond.

     Position the business for the future. In all of our actions we strive to
position ourselves for the future by maintaining maximum flexibility. The
investments made in people and physical assets over the last few years have
brought us to a position that should create an even broader range of
opportunities.

     This year has seen an upturn in the external market environment that I
believe will be lasting, but not without volatility. While commodity prices may
not be sustainable at the higher year-end levels, the fundamentals of this
business appear to be better than at any time during my association with
Nabors. The outlook is likely to remain positive because our customers have
been able to maintain a good level of profitability and capital spending even
at significantly lower commodity prices. This situation along with advances in
seismic and drilling technology have reinvigorated existing markets and created
whole new prospects, leading to increased rig demand, particularly for our
deeper diesel electric SCR rigs which are in tight supply. These trends appear
to be continuing and your Company is focused on meeting the customers'
challenge of holding the line on unit costs in the face of increasing rig
rates. We expect to accomplish this through higher productivity and efficiency,
by continuing to implement improvements in technology and by adopting the
industry's best practices. We are constantly striving to achieve higher
standards of quality and safety, while broadening the breadth of services we
offer our customers.

     The balance of this year's report presents our view of the external market
environment and the potential created by our enhanced market position. With
only 60 percent worldwide utilization of our fleet and an increasingly
favorable rig supply/ demand outlook, we believe that we are on the verge of
realizing the operating leverage that exists in our Company.

     Thank you for your support and, as always, I assure you of our diligence
in striving to enhance the value of your holding in Nabors.

Sincerely,

/s/ EUGENE M. ISENBERG
Eugene M. Isenberg
Chairman and Chief Executive Officer

                                      4
<PAGE>   14
                                    [PHOTO]
<PAGE>   15
THE MARKET

     The oil and gas market took an apparent turn that holds great promise for
Nabors Industries in 1997 and beyond. This optimism can be attributed to
several factors.

     First, we are seeing some exciting trends in exploration and production.
Worldwide exploration spending is rising. Rig demand in Latin and South America
is experiencing significant growth, particularly in Venezuela and in the Andean
Mountain region of Colombia. The Middle East is experiencing renewed activity,
particularly in Saudi Arabia. Alaska is also developing several new fields that
were not economically feasible only a few years ago. Offshore activity
worldwide has increased substantially, particular in the US Gulf of Mexico, and
offshore rig supply and demand has approached balance, causing a rapid rise in
dayrates for offshore rigs. Even more important to Nabors is the resurgence of
the US land market as a result of a tightened gas supply/demand situation and
new prospects identified by 3-D seismic. This is having a positive effect on
rig supply/demand balance and correspondingly, is beginning to affect the
pricing environment in certain sizes of rigs in active markets.

     This activity is being fueled largely by a worldwide increase in demand
for oil and gas and by technological achievements like 3-D seismic and
horizontal drilling. Advances in technology have played a particularly
important role. They have reduced exploration risks by allowing operators to
not only identify new drilling prospects with greater certainty, but also to
hit these targets with a higher degree of accuracy, and to obtain an
accelerated production rate and greater yield from each reservoir. This reduces
the operators' unit finding costs significantly, a factor in expanded drilling
programs. When combined with internal restructuring and cost cutting, the
operator can be profitable at lower oil and gas prices, and thus reduce the
fluctuations in their exploration and production spending that usually
accompany swings in the price of petroleum on the open market.

     While technology is improving operators' success rates, it also leads to
deeper, more complex wells. These generally take longer to drill and require
larger, more sophisticated rigs, demand for which is now pressing supply. This
is beginning to be manifested in higher rig values and increasing dayrates.
Because Nabors has a large number of these rigs, even a slight increase in
price can have a significant impact on our profitability, one of many reasons
why we are enthusiastic about the future.

                                      5
<PAGE>   16


THE CUSTOMER

     Customers today want continuous improvement in safety and quality in every
product and service. They also want to lower their unit finding costs through
constant improvements in productivity and technology.

     While technological breakthroughs are helping to achieve these goals, they
also require a higher level of competency and sophistication on the part of the
contractor in the new world of underbalanced, extended reach and horizontal
drilling. Nabors can excel here by consistently striving for higher levels of
quality in both our equipment and our people.

     To focus these resources more effectively, Nabors has increased the number
and style of our commercial arrangements. The majority of our work is still on
a traditional dayrate basis, but we have also responded to our customers'
requests for an expanded relationship. This may take the form of an alliance,
which begins with common goals and a division of the work in alignment with
each party's core competencies. More of the customer's expertise can now be
focused on optimizing the location and type of wellbore in the reservoir so as
to maximize the rate and degree of recovery. Other areas, like planning,
construction, logistics and actually drilling the well fall to Nabors. These
relationships have been successful when there is the right allocation of
control and the right balance of risk and reward.

     Nabors is also focusing on providing a more comprehensive package of
services for our customers at the wellhead. This is being accomplished by
providing additional services through our own fleet and by acquiring companies
with proprietary technology like CANRIG, our top drive manufacturer, and EPOCH,
our well logging and drilling instrumentation subsidiary. Having these
additional service capabilities allows the Company to be more of a one stop
shop for the convenience of our customers. They also increase our content at
the wellhead while simultaneously providing cost savings opportunities for both
Nabors and our customers.

THE POSITION

     Every year Nabors continues to refine and improve our position in the
drilling sector of the oil service business, expanding our assets, our market
penetration and our scope of services. As a result, the Company is well
positioned to withstand the effects of a market downturn and poised for
accelerated growth in what promises to be a dynamic marketplace.

                                      6
<PAGE>   17


                                    [PHOTO]

<PAGE>   18



     Our ability to endure fluctuations in markets and commodity prices stems
from the balance and diversity of our revenue streams. For instance,
approximately 60 percent of the Company's business globally is oil and 40
percent is gas. In North America it's just the opposite, approximately 40
percent oil and 60 percent gas. Land drilling accounts for nearly 70 percent of
our gross revenues with the remainder coming from offshore operations. North
American operations generate approximately 70 percent of our total revenues
while 30 percent come from International operations.

     Our potential for growth in this very fragmented market is largely the
result of the quantity, quality and diversity of our rigs. At present we have
240 actively marketed rigs in the continental United States land drilling
market with a large portion of the more highly sought diesel electric SCR rigs.
We also have a good share of the drilling market in Alaska and an equal amount
of the oilfield construction and logistics business. This leaves us well
positioned to better serve our customer's needs through multi-regional
alliances because we have the right rigs in the right places, and a lower cost
structure through economics of scale.

     Nabors has a significant position in the international land segment, as
well. The Company is an active participant in South America, particularly
Venezuela and Colombia, and in the Middle East. Offshore, Nabors' Sundowner
subsidiary is a leader in offshore platform workover operations and is emerging
as a leader in offshore platform drilling with its innovative MASE(TM) rigs,
patterned after the highly successful Sundowner workover rig design.

     The strength of our market position and the quality of our operating
assets will also allow us to continue to participate in synergistic or
contiguous business opportunities that provide equipment or services that bring
value to ourselves and our customers. This combination of both horizontal and
vertical integration has the potential to provide increased wellsite content
while generating cost economies for Nabors and our customers.

     What this means is that the Company is now well positioned to take
advantage of favorable trends wherever and whenever they occur, and diversified
enough so that unfavorable trends in any one area will have minimal impact.
This bodes well for our customers, our employees and our investors.

                                      7
<PAGE>   19



     How did Nabors get to this position? Primarily by being willing to
implement our strategy of recognizing opportunities, reinvesting our cash flow
in rigs and rig companies, achieving economies of scale and diversifying our
holdings at a time when many companies continued to scale back. This strategic
positioning of the Company combined with a conservative balance sheet and a
focus on sustainable markets have brought the Company to the point where it has
a greatly expanded horizon of opportunities to grow revenues and control costs.

THE RESOURCES

     Since its inception Nabors has been assembling the human, financial and
physical resources necessary to be solidly profitable whatever the market
conditions, and to further increase earnings when the market is strong. These
resources are now in place and give great potential to 1997 and the succeeding
years.

     One of the primary assets of any company is its human talent pool. Nabors
will continue to place a high priority on recruiting and retaining quality
people at every level of the organization. Special emphasis is placed on rig
crew and field supervisors where our customers see the biggest impact. Nabors
has developed a personnel base with experience in virtually every significant
oil, gas and geothermal drilling area worldwide. This talent is translatable
with Nabors moving people and equipment from one area to another thereby taking
advantage of our expertise, experience and knowledge of the best practices in
any given situation. Nabors has also assembled an engineering department with
similar levels of experience. During the last five years they have designed,
built or modified a significant number of rigs, many with proprietary designs
and innovative technology. Developing this cadre of employees was very
important for Nabors because finding competent and qualified people has and
will continue to be a critical issue in the industry.

     Another primary resource the Company has is good financial strength and
stability. This has not only provided a competitive advantage during
acquisitions, but allowed the Company to upgrade and maintain its existing
assets. It also allowed the Company to obtain an investment grade credit rating
and thus obtain favorable terms for its recently issued subordinated
convertible debentures, which were well received and are still selling at a
substantial premium. Proceeds from this offering combined with existing credit
lines and our continually improving cash flow from operations now give Nabors
the size and flexibility to take advantage of a broadened scope of
opportunities.

                                      8
<PAGE>   20


                                    [PHOTO]

<PAGE>   21



     The Company has assembled a diverse and strategically located rig fleet
with rigs of every depth range located in most of the major oil and gas areas
of the world. The Nabors fleet includes the industries largest quantity of deep
capacity diesel electric rigs. These rigs command higher margins and are in
strong demand for deeper, more sophisticated wells. We also have a good share
of the highly mobile, shallow and medium depth rigs. The Company's Sundowner
subsidiary has the most modular, most mobile offshore platform workover rigs in
the industry, and its MASE platform drilling rigs are continuing Sundowner's
legacy of enhancing customer economics. Recent acquisitions have also provided
the Company with additional high quality rigs, people and component parts,
which insure the Company's continuing ability to meet demand.

     Finally, Nabors has worked hard to make technology one of its most
valuable resources. In addition to the innovative MASE platform drilling rig,
the Company also offers a sophisticated top drive system through its CANRIG
subsidiary. Our recently acquired EPOCH subsidiary allows the Company to offer
mud logging services and drilling instrumentation systems which provide a
significant cost benefit to Nabors while increasing the scope of services we
can offer to our customers.

THE STRATEGY

     To take advantage of the opportunities that are sure to arise in the
coming years will require a clearly defined strategy. At Nabors, that strategy
is already in place. It's the same one we have used to build the Company into
the largest land drilling contractor in the world.

     Our strategy includes maintaining our numerous competitive advantages. We
are in a strong financial position from which to make appropriate internal and
external investments, we have great geographical diversity, we have a very low
cost structure and we are constantly expanding the services we offer our
customers.

     We will continue to focus on our customers' ever evolving needs and how to
meet them. In the process we will attempt to build expanded relationships with
good customers in long-term, sustainable markets.

     We will continue to improve our financial performance through increased
yields on existing assets. This will entail a constant focus on cost control
while finding additional wellsite content and new ways to improve utilization
and margins with

                                      9
<PAGE>   22



minimal capital. We have already taken important steps to reduce cost, and
supply and demand balance for rigs is paving the way for better yields.

     We will continue to invest in upgrading existing assets when the return
justifies it. We are doing this in several ways. For instance, we are adding
top drives to many of our rigs in response to increased customer demand. We
also expect to soon unstack, upgrade and put into service some of the inactive
rigs acquired in recent acquisitions.

     We will look to invest in new assets where we have a competitive
advantage. Our Sundowner MASE rig is a good example of a product with a
significant competitive advantage and we expect to build more of these in the
future.

     We will continue to seek attractive acquisitions. This might include
additional land rig capacity when the assets have strategic appeal and there is
potential for synergy with what we already own, as was the case with the Noble
and Exeter acquisitions. It would also include acquisitions where an infusion
of capital would allow us to exploit a technological advantage, as was the case
when we acquired Sundowner. We're also looking for technologically advanced
products or services which we can integrate with our current operations and
which offer the potential for increasing our profitability at the wellhead. The
CANRIG and EPOCH acquisitions are good examples.

THE CHALLENGE

     There is clearly great optimism surrounding the recently re-energized oil
service industry and equal enthusiasm at Nabors with regard to our ability to
participate in it. There will be seen and unforeseen challenges, however, and
our task will be to anticipate, prepare for and meet these challenges.

     Among the foreseen challenges will be finding qualified people as growth
and attrition require. The economic state of the industry over the last 15
years curtailed the hiring of much new talent and this has created a shortage
of people from that generation. That's why we have implemented a program of
hiring undergraduate engineers and technically experienced MBAs who can be
rapidly trained to fill our operational and managerial needs at these levels.
We've also implemented a training program to upgrade skills at the

                                      10
<PAGE>   23


                                    [PHOTO]

<PAGE>   24

field level, and to develop and train field supervisory personnel. When
combined with our active recruiting program it shows great potential to
successfully address what is sure to be an industry-wide manpower need.

     The next foreseen challenge will be keeping up with market demand for rigs
without sacrificing quality and safety. Since we are only at 60 percent
capacity, we clearly have the rigs and components to meet a significant amount
of increased demand. We also have the financial resources to obtain more of the
rigs that are in tight supply by investing in new capacity, reactivations and
upgrades.

     Finding ways to lower our customers' costs is another foreseen challenge.
We are committed to this process and have had great success with the
establishment of alliances which have paid dividends for all parties involved.
We will continue to investigate the application of emerging technologies and
will remain a clearinghouse for the best practices and procedures
industry-wide. This effort has played a roll in keeping our customers' costs
down and we expect it to play a bigger role in the future.

     Risks, be they financial, contractual liability, operational, market or
political are often unforeseen challenges. We are always taking steps to
mitigate our risks and have employed successful strategies in the past. The
changing nature of the world and our industry will require us to come up with
new and innovative approaches to both new and age old problems.

     There is clearly no shortage of challenges as we move into an exciting
time in the oil and gas industry. We feel the greatest security we can offer
our customers, employees and investors is to anticipate these challenges and
set in motion a flexible and dynamic plan to address them.

                                      11
<PAGE>   25
RIG FLEET

<TABLE>
<CAPTION>
                                                                    Greater
                               Less than   10,000      15,000         than
LAND RIG FLEET - 329 RIGS        10,000   to 14,999   to 19,999      20,000      Total
- --------------------------------------------------------------------------------------
<S>                               <C>         <C>        <C>          <C>        <C>
ALASKA
  North Slope                                  3           1           5           9
  Kenai/Cook Inlet                             1           2                       3
                               -------------------------------------------------------
INTERNATIONAL
  Middle East                      4           7           4           4          19
  South and Central America        1           8           2           7          18
  CIS                              1           3           1                       5
  Africa                                       1           1                       2
  Far East                                     1           2           1           4
                               -------------------------------------------------------
US LOWER 48                       34          69          93          45         241
                               -------------------------------------------------------
CANADA                             9           5           6           8          28
                               -------------------------------------------------------
TOTAL                             49          98         112          70         329
                               -------------------------------------------------------
</TABLE>

<TABLE>
<CAPTION>
                                      Sundowner 
                                 Offshore Platforms
                                 ------------------
                                  MASE     Sundowner    Platform
Offshore Rig Fleet - 34 Rigs    Drilling    Workover    Drilling      Jackup      Barge      Total
- --------------------------------------------------------------------------------------------------
<S>                                 <C>        <C>          <C>         <C>         <C>        <C>
ALASKA                                                      1                                   1
                                ------------------------------------------------------------------
INTERNATIONAL
  Middle East                                                           1                       1
  South and Central America         1                                                           1
  CIS                                           1                                               1
  Europe and Africa                             2                                               2
                                ------------------------------------------------------------------
Gulf of Mexico                      2          11           5           5*          5**        28
                                ------------------------------------------------------------------
TOTAL                               3          14           6           6           5          34
                                ------------------------------------------------------------------
</TABLE>

*  Includes one charter.
** Includes three plug and abandonment barges.

<TABLE>
<CAPTION>
                                      Less than       10,000 to         15,000 to       20,000 and
                                        10,000          14,999            19,999          Greater 
                                    -------------    -------------     -------------    ------------
US Lower 48 Rig Fleet - 241 Rigs    Mech      SCR    Mech      SCR     Mech      SCR    Mech     SCR   Total
- ------------------------------------------------------------------------------------------------------------
<S>                                   <C>       <C>    <C>       <C>     <C>      <C>      <C>    <C>    <C>
SOUTHERN DIVISION
  East Texas District                                   7*       1        7*      17*              5*     37
  South Texas District                                  7        1        4       13       2       9      36
  Arkoma District                      6                7        1        8        1               7      30
                                    ------------------------------------------------------------------------
GULF COAST DIVISION
  Gulf Coast District                                            1        3                4       7      15
  Gulf of Mexico District                                                 1                        1       2
                                    ------------------------------------------------------------------------
WESTERN DIVISION
  California District                  1                1        1                 3               4      10
  Costa Rica District                                                              2                       2
  Northeast District                   6                                                                   6
  North Dakota District                                 7                 9        2                      18
  West Texas District                 10               17                 6        2       2       1      38
  Rockies District                     9        2      17        1       12        3               3      47
                                    ------------------------------------------------------------------------
Total                                 32        2      63        6       50       43       8      37     241
                                    ------------------------------------------------------------------------
</TABLE>

* Number includes Noble rigs acquired as of December 31, 1996.

                                      12
<PAGE>   26
                                    [PHOTO]


                              AREAS OF OPERATION
<PAGE>   27
DIRECTORS

EUGENE M. ISENBERG 
Chairman and Chief Executive Officer 
Nabors Industries, Inc. 

ANTHONY G. PETRELLO 
President and Chief Operating Officer 
Nabors Industries, Inc. 

RICHARD A. STRATTON
Vice Chairman 
Nabors Industries, Inc. 

GARY T. HURFORD 
President 
Hunt Oil Company 

HANS W. SCHMIDT 
Formerly President 
Deutag Drilling

MYRON M. SHEINFELD 
Attorney 
Sheinfeld, Maley & Kay

JACK WEXLER 
International Business Consultant

MARTIN J. WHITMAN
Managing Director 
Whitman Heffernan Rhein & Co., Inc.
Chairman
Danielson Holding Corporation


OFFICERS

EUGENE M. ISENBERG 
Chairman and Chief Executive Officer

ANTHONY G. PETRELLO 
President and Chief Operating Officer

RICHARD A. STRATTON
Vice Chairman

MICHAEL W. DUNDY 
Vice President and General Counsel

DANIEL MCLACHLIN 
Vice President and Corporate Secretary

BRUCE P. KOCH 
Vice President of Finance

                                      14
<PAGE>   28

                                    [PHOTO]
<PAGE>   29
FINANCIAL REVIEW


16 Selected Financial Data

17 Management's Discussion and Analysis of Financial Condition and Results 
   of Operations

23 Report of Independent Accountants

24 Consolidated Balance Sheets

25 Consolidated Statements of Income

26 Consolidated Statements of Changes in Stockholders' Equity

27 Consolidated Statements of Cash Flows

28 Notes to Consolidated Financial Statements

                                      15
<PAGE>   30
SELECTED FINANCIAL DATA                 NABORS INDUSTRIES, INC. AND SUBSIDIARIES

(In thousands, except per share amounts)

<TABLE>
<CAPTION>
                                                                   Year Ended September 30,
OPERATING DATA(1)              1996      1995      1994         1993      1992      1991     1990    1989    1988         1987
                             --------  --------  --------     --------  --------  -------- -------- ------- -------     --------
<S>                          <C>       <C>       <C>          <C>       <C>       <C>      <C>      <C>     <C>         <C>      
Revenues                     $719,743  $572,788  $484,268     $419,406  $312,407  $264,239 $153,920 $85,600 $63,060     $ 33,126
Operating expenses:
  Direct costs                539,665   434,097   369,677      313,458   215,939   187,873  111,405  64,285  50,682       29,831
  General and
    administrative expenses    56,862    49,094    49,365       45,257    45,237    35,923   22,900  12,085   8,473        6,230
  Depreciation and
    amortization               46,117    31,042    26,241       22,434    16,526    10,119    5,232   3,884   3,502        5,855
  Provision for reduction in
    carrying value of assets     --        --      29,686(2)      --        --        --       --      --      --         64,000(3)
                             --------  --------  --------     --------  --------  -------- -------- ------- -------     --------
Operating income (loss)        77,099    58,555     9,299       38,257    34,705    30,324   14,383   5,346     403      (72,790)
Interest income
  (expense), net               (9,189)   (5,917)   (5,778)      (7,733)   (4,349)      551    1,153      48  (8,422)(4)  (18,747)(4)
Other income (expense), net    13,690     5,990     2,718       11,593     5,559     2,395    3,341   1,790   4,012         (562)
                             --------  --------  --------     --------  --------  -------- -------- ------- -------     --------
Income (loss) before
  income taxes (benefits)      81,600    58,628     6,239       42,117    35,915    33,270   18,877   7,184  (4,007)     (92,099)
Income taxes (benefits)        11,100     7,524     4,889        3,559     2,175     3,546    2,476      19    (780)      (7,146)
                             --------  --------  --------     --------  --------  -------- -------- ------- -------     --------
Income (loss) before
  extraordinary gain           70,500    51,104     1,350       38,558    33,740    29,724   16,401   7,165  (3,227)     (84,953)
Extraordinary gain               --        --        --           --        --        --       --      --    26,749(5)      --
                             --------  --------  --------     --------  --------  -------- -------- ------- -------     --------
Net income (loss)            $ 70,500  $ 51,104  $  1,350     $ 38,558  $ 33,740  $ 29,724 $ 16,401 $ 7,165 $23,522     $(84,953)
                             --------  --------  --------     --------  --------  -------- -------- ------- -------     --------
Primary earnings (loss)
  per share:
    Income (loss) before
      extraordinary gain     $    .76  $    .58  $    .02     $    .50  $    .46  $    .42 $    .27 $   .14 $  (.12)    $  (5.90)
    Extraordinary gain           --        --        --           --        --        --       --      --       .97(5)      --
                             --------  --------  --------     --------  --------  -------- -------- ------- -------     --------
  Net income (loss)          $    .76  $    .58  $    .02     $    .50  $    .46  $    .42 $    .27 $   .14 $   .85     $  (5.90)
                             --------  --------  --------     --------  --------  -------- -------- ------- -------     --------
Weighted average number
  of shares outstanding        93,162    88,018    85,620       77,806    74,037    70,395   61,143  51,644  27,671       14,403
                             --------  --------  --------     --------  --------  -------- -------- ------- -------     --------
</TABLE>

<TABLE>
<CAPTION>
                                                                        As of September 30,
BALANCE SHEET DATA(1)          1996      1995      1994         1993      1992      1991     1990    1989    1988         1987
                             --------  --------  --------     --------  --------  -------- -------- ------- -------     --------
<S>                          <C>       <C>       <C>          <C>       <C>       <C>      <C>      <C>     <C>         <C>      
Cash and short-term
  marketable securities      $104,027  $ 15,334  $ 45,232     $ 70,458  $ 14,783  $ 15,139 $ 29,332 $ 6,484 $ 13,354     $  6,509
Working capital               172,091    33,892    77,248      113,653    33,831    15,650   40,956   7,784    8,678        4,433
Property, plant and
  equipment, net              511,203   393,464   283,141      270,865   220,761   185,543  109,928  42,728   28,357       36,435
Long-term marketable
  securities                   11,839     9,645    20,266         --        --        --       --      --       --           --
Total assets                  871,274   593,272   490,273      493,927   339,930   285,615  226,846  75,519   61,123       54,086
Long-term obligations         229,504    51,478    61,879       73,109    49,294    37,489   37,729   7,760    4,254       65,864
Stockholders' equity
  (deficit)                   457,822   368,750   317,424      307,583   201,058   157,302  117,335  47,215   36,101      (26,787)
Capital expenditures
  and acquisitions            174,483   144,560    62,907       84,752    61,124    88,104   73,943  19,751    7,414        3,248
                             --------  --------  --------     --------  --------  -------- -------- ------- --------     --------
</TABLE>

(1)  The results of operations and financial position for all years prior to
     1995 have been retroactively restated to include the results of operations
     and financial position of Sundowner Offshore Services, Inc., which was
     merged with the Company during October 1995. Other acquisitions' results
     of operations and financial position have been included beginning on the
     respective dates of acquisition, and include Exeter Drilling Company and
     its subsidiary, JW Gibson Well Services Company (April 1996), Delta
     Drilling Company (January 1995), Grace Drilling Company (June 1993),
     Henley Drilling Company (November 1990), Loffland Brothers Company (March
     1990) and the Westburne Group of Companies (November 1988).

(2)  Represents reduction in carrying value of the Company's Yemen logistical
     assets and inventory as well as facility closure costs in certain
     international areas, including Yemen, totaling $.35 per share.

(3)  Represents reduction in carrying value of the Company's rig assets in
     Alaska, US Lower 48 and Canada totaling $4.44 per share.

(4)  Includes interest expense and discount amortization totaling $7.8 million
     and $18.8 million during 1988 and 1987, respectively, relating to secured
     income notes.

(5)  Represents gain recognized in connection with the Company's
     reorganization.

                                      16
<PAGE>   31
MANAGEMENT'S DISCUSSION AND ANALYSIS 
OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

RESULTS OF OPERATIONS

FISCAL YEAR 1996 COMPARED TO FISCAL YEAR 1995

     Company revenues for fiscal year 1996 ("1996") totaled $719.7 million,
representing a $147.0 million, or 26% increase, compared to fiscal year 1995
("1995"). Operating income during 1996 totaled $77.1 million, compared to $58.6
million during 1995. Net income totaled $70.5 million ($.75 per share) during
1996, compared to $51.1 million ($.57 per share) during the prior year. The
significant improvement in operating results during 1996 is attributable to
the Company's operations in Alaska, the US Lower 48, the Gulf of Mexico and
South America.

     The following tables set forth information with respect to the Company and
its subsidiaries on a consolidated basis by geographical area:

<TABLE>
<CAPTION>
                                                                                            Increase (Decrease)
                                                                             ------------------------------------------
(In thousands, except percentages)         1996        1995        1994         1996 to 1995           1995 to 1994
                                         --------    --------    --------    -------------------    -------------------
<S>                                      <C>         <C>         <C>         <C>             <C>    <C>            <C> 
Revenues:
  North America                          $532,638    $416,475    $323,149    $116,163        28%    $ 93,326        29%
                                         --------    --------    --------    --------      ----     --------      ---- 
  International:
    Middle East, CIS, Africa and other     64,682      58,932      76,156       5,750        10%     (17,224)      (23%)
    South and Central America              69,232      49,453      32,991      19,779        40%      16,462        50%
    UK North Sea                           53,191      47,928      51,972       5,263        11%      (4,044)       (8%)
                                         --------    --------    --------    --------      ----     --------      ---- 
      Total International                 187,105     156,313     161,119      30,792        20%      (4,806)       (3%)
                                         --------    --------    --------    --------      ----     --------      ---- 
                                         $719,743    $572,788    $484,268    $146,955        26%    $ 88,520        18%
                                         --------    --------    --------    --------      ----     --------      ---- 

Operating income (loss):
  North America                          $ 61,611    $ 47,989    $ 35,246    $ 13,622        28%    $ 12,743        36%
                                         --------    --------    --------    --------      ----     --------      ---- 
  International:
    Middle East, CIS, Africa and other      6,742       8,346     (26,091)     (1,604)      (19%)     34,437       132%
    South and Central America              14,531       8,031       5,781       6,500        81%       2,250        39%
    UK North Sea                            6,575       3,916       5,647       2,659        68%      (1,731)      (31%)
                                         --------    --------    --------    --------      ----     --------      ---- 
      Total International                  27,848      20,293     (14,663)      7,555        37%      34,956       238%
                                         --------    --------    --------    --------      ----     --------      ---- 
  Corporate                               (12,360)     (9,727)    (11,284)     (2,633)      (27%)      1,557        14%
                                         --------    --------    --------    --------      ----     --------      ---- 
                                         $ 77,099    $ 58,555    $  9,299    $ 18,544        32%    $ 49,256       530%
                                         --------    --------    --------    --------      ----     --------      ---- 
</TABLE>

<TABLE>
<CAPTION>
                                                   1996                    1995                    1994
                                            --------------------    --------------------    --------------------
                                             Rig         Rig         Rig         Rig         Rig         Rig
                                            Years    Utilization    Years    Utilization    Years    Utilization
                                            -----    -----------    -----    -----------    -----    -----------
<S>                                         <C>            <C>      <C>            <C>      <C>            <C>
Rig activity(1):
  North America                             152.6          58%      131.4          54%      100.8          46%
                                            -----         ---       -----         ---       -----         --- 
  International:
    Middle East, CIS, Africa and other       12.2          49%       12.5          44%       16.2          51%
    South and Central America                16.3          73%       13.4          89%        8.6          98%
    UK North Sea                              N/A         N/A         N/A         N/A          .8         100%
                                            -----         ---       -----         ---       -----         --- 
      Total International                    28.5          61%       25.9          60%       25.6          62%
                                            -----         ---       -----         ---       -----         --- 
                                            181.1          58%      157.3          56%      126.4          49%
                                            -----         ---       -----         ---       -----         --- 
</TABLE>

(1)  Excludes labor contracts and Gibson workover and well servicing rigs.

<TABLE>
<CAPTION>
                                                              1996       1995       1994
                                                            --------   --------   --------
<S>                                                         <C>        <C>        <C>     
Average West Texas intermediate crude oil spot ($/bbl)(1)   $  20.50   $  18.30   $  16.88
Average US natural gas spot ($/mcf)(1)                      $   2.11   $   1.45   $   1.90
Average US land rig count(2)                                     759        736        786
Average International land rig count(2)                          553        542        531
                                                            --------   --------   --------
</TABLE>

(1)  Source: Bloomberg
(2)  Source: Baker Hughes

                                      17
<PAGE>   32

     North American revenues (including Canada) totaled $532.6 million during
1996, representing a 28% increase over 1995. The increase was primarily
attributable to more equivalent rig years in the US Lower 48, where revenues
increased by 30% due to the addition of the Exeter Drilling Company rigs
acquired in April 1996 and the Delta Drilling Company rigs acquired in January
1995. Revenues for the Gulf of Mexico operations increased by 28% during the
current year as compared to the prior year. This was the result of increased
equivalent rig years and higher dayrates for the Company's platform drilling
rigs, platform workover rigs and jackup workover rigs. Platform drilling rig
equivalent rig years increased in part as a result of the purchase of rig 85.
This rig was purchased during 1995, but did not commence operations until the
first quarter of 1996. Additionally, the newly constructed MASE rig 802 and rig
269, an adapted land rig, began working in June 1996. Platform workover rig
equivalent rig years increased due to the addition of the newly constructed
Super Sundowner XVI rig, which commenced operations in September 1995, and
Sundowner XII, which was redeployed from Australia to the Gulf of Mexico in May
1995. Alaskan operation revenues increased by 26% as a result of increased
equivalent rig years and the October 1995 acquisition of Alaska Interstate
Construction by Peak Oilfield Services, the Company's Alaskan construction and
logistics joint venture. Equivalent rig years for North America during 1996
totaled 152.6 years, compared to 131.4 years during 1995.

     International revenues totaled $187.1 million during 1996, representing a
20% increase compared to 1995. Equivalent international rig years, excluding
labor contracts, increased to 28.5 years during 1996 compared to 25.9 years
during 1995.

     Middle Eastern, CIS and African revenues totaled $64.7 million during
1996, representing a 10% increase from 1995. The increase was primarily
attributable to new contracts in Saudi Arabia for three rigs which commenced
operations in the third quarter of 1996, partially offset by lower rig activity
in Africa. Middle Eastern, CIS and African equivalent rig years during 1996
totaled 12.2 rig years as compared to 12.5 years during 1995.

     South and Central American revenues totaled $69.2 million, representing a
40% increase over 1995. The increase was primarily attributable to the newly
constructed MASE rig 801, which began operations in Trinidad during January
1996, and a one rig drilling contract in Colombia, which commenced during
November 1995. Additionally, increased revenues resulted from increased
activity and higher day rates in Venezuela, where equivalent rig years during
1996 totaled 13.9 years as compared to 11.5 during 1995. Venezuela represented
approximately 74% and 85% of total South and Central American revenues and
equivalent rig years, respectively, during 1996. South and Central American rig
years totaled 16.3 years during 1996, compared to 13.4 years during 1995.

     UK North Sea revenues totaled $53.2 million during 1996, representing an
increase of 11% compared to 1995. The increase in UK North Sea revenues
resulted from additional labor contracts during 1996. Total equivalent rig
years, consisting of labor contracts, totaled 10.0 during 1996 as compared to
8.4 years during 1995. Subsequent to year-end, during November 1996, the
Company completed the sale of its UK North Sea operation. The transaction will
result in a gain which will be reflected in the Company's financial statements
in the first quarter of 1997.

     The following table sets forth selected consolidated financial information
of the Company expressed as a percentage of total operating revenues:

<TABLE>
<CAPTION>
                                          1996      1995      1994
                                         -----     -----     ----- 
<S>                                      <C>       <C>       <C>   
Revenues                                 100.0%    100.0%    100.0%
                                         -----     -----     ----- 
Operating expenses:
  Direct costs                            75.0%     75.8%     76.4%
  General and administrative
    expenses                               7.9%      8.6%     10.2%
  Depreciation and amortization            6.4%      5.4%      5.4%
  Provision for reduction in carrying
    value of assets                        --        --        6.1%
                                         -----     -----     ----- 
      Operating expenses                  89.3%     89.8%     98.1%
                                         -----     -----     ----- 
Operating income                          10.7%     10.2%      1.9%
Other income (expense)                      .6%       .0%      (.6%)
                                         -----     -----     ----- 
Income before income taxes                11.3%     10.2%      1.3%
Income taxes                               1.5%      1.3%      1.0%
                                         -----     -----     ----- 
Net income                                 9.8%      8.9%       .3%
                                         -----     -----     ----- 
</TABLE>

Direct costs as a percentage of revenues totaled 75% during 1996 as compared to
76% during 1995. The increase in operating margins during 1996 is largely due
to improved margins for the Company's South American operations, including
Venezuela and Colombia, and the contribution of the newly constructed MASE rig
801. Improved margins for the Company's Gulf of Mexico operations also
contributed. These improvements in operating margins were partially offset,
however, by a decline in the margins earned for the Company's Middle Eastern
operations, resulting primarily from higher than expected costs related to the
deployment of three rigs to Saudi Arabia during the third quarter of 1996.

                                      18
<PAGE>   33

Steps are being taken by the Company to restore the expected level of
profitability of these rigs and to recover some of the unexpected costs
incurred to date. Additionally, a decrease in operating margins resulted
because an increased percentage of the Company's total revenues during 1996
were generated by the Company's US Lower 48 operations. These contracts are
usually at a lower gross margin percentage than the Gulf of Mexico, Alaskan and
International contracts.

     General and administrative expenses as a percentage of revenues decreased
during 1996 due to an expanding revenue base in the US Lower 48 and Gulf of
Mexico.

     Depreciation and amortization expense as a percentage of revenues totaled
6% during 1996 as compared to 5% during 1995. The increase in depreciation and
amortization is the result of capital expenditures for new rig construction,
enhancements and acquisitions made during 1995 and 1996. The Company's capital
expenditures are classified as follows:

<TABLE>
<CAPTION>
(In thousands)                            1996            1995            1994
                                        --------        --------        --------
<S>                                     <C>             <C>             <C>     
New construction                        $ 39,191        $ 21,577        $  9,480
Enhancement                               45,334          40,695          13,256
Acquisition                               53,208          57,463          25,234
Sustaining                                36,750          24,825          14,937
                                        --------        --------        --------
                                        $174,483        $144,560        $ 62,907
                                        --------        --------        --------
</TABLE>

     Interest expense increased during 1996, primarily as a result of the
interest associated with the $172.5 million, 5% Subordinated Notes issued on
May 28, 1996 (the "5% Notes"), as well as short-term, high interest borrowings
in Venezuela for foreign currency hedging purposes. Interest income increased
during 1996 due to higher average cash and cash equivalent balances that
resulted from remaining proceeds from the 5% Notes.

     Other income during 1996 included $4.9 million in realized and unrealized
gains from equity security transactions and $.5 million in dividend income.
Also included were insurance gains on damaged equipment totaling $4.7 million.
Foreign currency gains totaled $.5 million during 1996, relating primarily to
Venezuela. In December 1995, the Venezuelan bolivar devalued by approximately
71%, from an official fixed exchange rate of 170 bolivars per US dollar, to 290
per US dollar. As a result of the devaluation, the Company recognized a
translation gain of $.3 million during 1996, because the Company had a bolivar
denominated net monetary liability position. In April 1996, the Venezuelan
government, as part of moving toward a free market economy, eliminated exchange
rate control policies that had been established in June 1994. As a result, the
bolivar was allowed to float, and devalued by an additional 55% -- 70% as the
exchange rate ranged from 450 -- 500 bolivars to the US dollar. The Company
recognized an insignificant translation gain during the third quarter of 1996
as a result of this devaluation. During 1996, the Company reduced its net
monetary position by borrowing in the local currency. The Company increased its
foreign currency exposure in Saudi Arabia during 1996 as a result of increased
activity there resulting from a number of new drilling contracts. The Company,
through the use of forward exchange contracts, has offset a portion of its
foreign exchange exposure in Saudi Arabia. The Company will continue to monitor
its foreign currency exposures.

     Other income during 1995 included $2.6 million in realized and unrealized
gains from equity security transactions and $.3 million in dividend income.
Insurance gains on damaged equipment totaled $4.7 million, including a $4.1
million gain recorded for a rig damaged in Venezuela. Foreign currency loss
totaled $3.2 million during 1995. The 1995 losses include $2.5 million in the
UK North Sea relating to foreign currency losses that were deferred and
recognized as part of the specific transactions hedged.

     The current and deferred income tax provisions for 1996 and 1995 relate
primarily to foreign operations, including Canada, as substantially all of the
US taxable income is offset by available net operating loss carryforwards ("US
NOL"). As a result of the Company's available US NOL, the Company does not
expect to pay any regular US federal income taxes until the Company's US NOL
has been fully utilized, or expires. A valuation allowance is provided to
reduce deferred tax assets, which includes net operating loss carryforwards, to
a level which, more likely than not, will be realized. Primary factors
considered by management to determine the size of the allowance include the
competitive and cyclical nature of the Company's primary markets, and the
expiration timing of the net operating loss carryforwards (Note 8). For
accounting purposes, the Company expects to begin, during the first quarter of
1997, recording non-cash US federal deferred income taxes based on the
relationship between the amount of the Company's unused US NOL and the
temporary differences between the book basis and tax basis in the Company's
assets. The temporary differences primarily arise from having accelerated
depreciation for tax return purposes as compared to a lower depreciation amount
recorded for financial statement purposes. As a result, the Company's effective
tax rate for financial statement purposes during 1997 and thereafter should be
in the 35% to 38% range. Non-cash deferred taxes should represent the majority
of this amount until that point in time when the US NOL has been fully utilized
or expires.

                                      19
<PAGE>   34

FISCAL YEAR 1995 COMPARED TO FISCAL YEAR 1994

     During 1995, Nabors and Sundowner Offshore Services, Inc. ("Sundowner")
completed a tax-free merger. Under the merger agreement, Sundowner stockholders
received 2.8 shares of the Company's common stock for each of their shares of
Sundowner, or approximately 13.1 million common shares. The exchange resulted
in former Sundowner stockholders owning approximately 15% of the common stock
of Nabors outstanding after the merger.

     The merger has been accounted for as a pooling-of-interests. Accordingly,
the accompanying consolidated financial statements have been retroactively
restated to include the results of operations, financial position and cash
flows of Sundowner for all periods prior to the consummation of the merger.

     Company revenues for 1995 totaled $572.8 million, representing an $88.5
million, or 18% increase, compared to 1994. Operating income during 1995
totaled $58.6 million, compared to $9.3 million during 1994. Net income totaled
$51.1 million ($.57 per share) during 1995, compared to $1.4 million ($.02 per
share) during the prior year. The operating income and net income amounts
during 1994 include a $29.7 million charge ($.35 per share), representing a
provision for reduction in carrying value of assets. The significant
improvement in operating results during 1995 is primarily attributable to the
Company's operations in the US Lower 48, the Gulf of Mexico and Venezuela.

     North American revenues (including Canada) totaled $416.5 million during
1995, representing a 29% increase over 1994. The increase was primarily
attributable to more equivalent rig years in the US Lower 48, where revenues
increased by 38% due to the addition of the Delta Drilling Company rigs
acquired in January 1995, and the Mitchell Energy Development Corp. rigs
acquired in April 1994. The Company's increasing market share, resulting from
incremental activity under various customer alliance relationships as well as a
broadening customer base, further contributed to this increase. Revenues for
the Gulf of Mexico operations increased by 16% during the current year due to
higher dayrates for the Company's platform drilling rigs, the addition of one
inland barge drilling rig, and an increase in equivalent rig years for the
Company's platform workover rigs, including the newly constructed Super
Sundowner XIV and XV rigs, which commenced operations during July 1994 and
February 1995, respectively. This increase in activity in the US Lower 48 and
the Gulf of Mexico occurred despite lower natural gas prices in the US during
1995, and an overall decline in the Baker Hughes US land rig count. Alaskan and
Canadian revenues also increased during 1995, by 18% and 39%, respectively, due
to more equivalent rig years. Equivalent rig years for North America during
1995 totaled 131.4 years, compared to 100.8 years during 1994.

     International revenues totaled $156.3 million during 1995, representing a
3% decrease compared to 1994. Equivalent international rig years, excluding
labor contracts, totaled 25.9 years during 1995 compared to 25.6 years during
1994.

     Middle Eastern, CIS and African revenues totaled $58.9 mil-lion during
1995, representing a 23% decrease from 1994. The decrease was primarily
attributable to decreased logistical and drilling activity in Yemen due to
reduced exploration and development activity. The Company operated 12.5 rig
years during 1995 in the Middle East, CIS and Africa, down from 16.2 years in
1994. Yemen had operating losses during 1994 due to reduced drilling and
logistical activity, as well as the provision for reduction in carrying value
of assets.

     Revenues in the Company's South and Central American operations totaled
$49.5 million, a 50% increase over 1994. The increase was attributable to
increased activity in Venezuela. Venezuela represented approximately 89% and
85% of total South and Central American revenues and equivalent rig years,
respectively, during 1995. South and Central American rig years totaled 13.4
years during 1995, compared to 8.6 years in 1994.

     UK North Sea revenues totaled $47.9 million during 1995, representing a
decrease of 8% compared to 1994. Total equivalent rig years consisting of labor
contracts totaled 8.4 and 7.0 years during 1995 and 1994, respectively. The
decrease in revenues resulted from reduced incentive contracts, partially
offset by an increase in equivalent rig years resulting from the award of three
new labor contracts -- two during March 1995 and one during July 1995.

     Direct costs as a percentage of revenues totaled 76% during 1995 and 1994.
General and administrative expenses as a percentage of revenues decreased
during 1995 due to the effect of prior year cost-reduction measures for the
Company's international operations, primarily in the Middle East, and as a
result of the increase in revenues for the US Lower 48 operations, since these
expenses were spread over a larger revenue base. Depreciation and amortization
as a percentage of revenues totaled 5% during 1995 and 1994. The Company
recorded a $29.7 million provision for reduction in carrying value of assets
during the third quarter of 1994.

     Interest expense decreased during 1995, primarily due to the $6.0 million
of scheduled principal payments made on the $30.0 million 10.25% Senior Secured
Notes. Interest income decreased during 1995 due to lower average cash and
investment balances as these amounts were used to fund capital expenditures and
the acquisition of Delta.

     Other income during 1995 included $2.6 million in realized and unrealized
gains from equity security transactions and $.3 million in dividend income.
Insurance gains on damaged equipment totaled $4.7 million, including a $4.1
million gain recorded for a rig damaged in Venezuela.

                                      20
<PAGE>   35

Other income during 1994 included a $.9 million gain from the sale of an
investment in equity securities and $.6 million in dividend income. Foreign
currency losses totaled $3.2 million during 1995, compared to $1.5 million
during 1994. The 1995 losses primarily consisted of $2.5 million in the UK
North Sea relating to foreign currency losses that had previously been deferred
and recognized as part of the specific transactions being hedged. During 1994,
the Venezuela bolivar devalued by approximately 75%, as compared to the US
dollar. During June 1994, the Venezuelan government imposed exchange rate
control policies and an official fixed exchange rate of 170 bolivars to the US
dollar. As a result of the devaluation, the Company recorded translation losses
totaling $1.0 million during 1994. Subsequent to the June 1994 establishment of
the official fixed exchange rate, the Company reduced its bolivar net monetary
asset exposure. However, if the Venezuelan government allows the bolivar to
"float" relative to the US dollar or revises the official fixed exchange rate,
the Company could incur additional translation losses. The Company also
recorded amortization of deferred currency losses in the UK North Sea during
1994.

     The income tax provisions for 1995 and 1994 relate to foreign operations,
including Canada. Substantially all of the US taxable income is offset by
available net operating loss carryforwards. A valuation allowance is provided
to reduce the deferred tax assets, which includes net operating loss
carryforwards, to a level which, more likely than not, will be realized.
Primary factors considered by management to determine the size of the allowance
include the competitive and cyclical nature of the Company's primary markets
and the expiration timing of the net operating loss carryforwards.

LIQUIDITY AND CAPITAL RESOURCES

     In April 1996, the Company filed a shelf registration statement on Form
S-3 with the Securities and Exchange Commission to allow for offerings from
time to time of up to $250 million in debt securities, preferred stock, common
stock, depository shares or warrants. On May 28, 1996 the Company issued $172.5
million of 5% Convertible Notes with a scheduled maturity in 2006. The 5% Notes
are convertible into common shares of the Company at a conversion price of
$18.125 per share (Note 7). Approximately $60.0 million of the proceeds from
the 5% Notes were used to pay down long-term and short-term debt, with the
remainder of the proceeds to be used for general corporate purposes, including
working capital. The Company had working capital of $172.1 million as of
September 30, 1996, representing a $138.2 million increase over the prior year.
The ratio of long-term debt to long-term debt plus shareholder's equity,
commonly referred to as debt to capital ratio, was 0.35:1 and 0.20:1 as of
September 30, 1996 and 1995, respectively. The increase in the Company's
working capital and debt to capital ratio during 1996 are primarily
attributable to the issuance of the 5% Notes.

     Cash and cash equivalents increased by $83.8 million during 1996, compared
to a decrease of $10.5 million during 1995.

     Net cash provided by operating activities totaled $84.1 mil-lion during
1996, compared to $73.8 million during 1995. During 1996 and 1995, net income
as adjusted for non-cash items, such as depreciation, was partially offset by
the negative impact on cash that resulted from changes in the Company's working
capital accounts.

     Net cash used for investing activities totaled $160.4 million during 1996,
compared to $87.4 million during 1995. Capital expenditures, cash paid for the
acquisition of Exeter, and purchases of marketable securities represented the
primary uses of cash during 1996. This was partially offset by sales and
maturities of marketable securities, as well as proceeds from sales of fixed
assets and insurance claims. During 1995, capital expenditures and cash paid
for the acquisition of Delta represented the primary uses of cash. This was
partially offset by maturities and sales of marketable securities.

     Financing activities provided cash totaling $160.1 million during 1996,
compared to $3.1 million during the previous year. Cash provided during 1996
resulted from long-term borrowings, primarily the $172.5 million Convertible
Subordinated Notes, and common stock transactions, partially offset by a
reduction in short-term borrowings and princi-pal payments on long-term
obligations. In the prior year, cash provided by short-term and long-term
borrowings was partially offset by scheduled principal payments on long-term
obligations.

     The Company's cash and cash equivalents and short-term investments in
marketable securities totaled $104.0 million as of September 30, 1996. In
addition, the Company had long-term investments in marketable securities of
$11.8 million. The Company currently has credit facility arrangements with a
number of banks totaling $66.1 million. These credit facilities are limited at
any given time to receivables of certain of the Company's subsidiaries. As of
September 30, 1996, remaining availability, after borrowings on the facilities
and outstanding letters of credit, totaled approximately $44.2 million.

     As of September 30, 1996, the Company had capital expen-diture commitments
totaling approximately $17.5 million.

     During November 1996, the Company completed the sale of its wholly owned
UK North Sea subsidiary. The Company received approximately $36.0 million plus
the value of working capital in cash, as well as 10.8 million four year
warrants to purchase stock in Abbot Group plc at 83 pence per share (Note 15).

                                      21
<PAGE>   36

     During December 1996, the Company purchased 47 land drilling rigs from
Noble Drilling Corporation for $60.0 million in cash (Note 15).

     During December 1996, the Company's Board of Directors rescinded the
Company's stock repurchase plan due to uncertainties regarding the Securities
and Exchange Commission's Staff Accounting Bulletin No. 96. Rescinding the plan
allows the Company to avoid potential issues when it uses the
pooling-of-interests method of accounting for mergers. The Company has not
repurchased any shares under the stock repurchase plan since its original
authorization during December 1995.

     During December 1996, the Company executed a definitive agreement to merge
with Adcor-Nicklos Drilling Company ("Adcor") in a stock-for-stock exchange.
All of the stock of Adcor will be exchanged for approximately 3.4 million
shares of Nabors common stock. The transaction, which has already received
government approval, is expected to close in January 1997 (Note 15).

     The current cash and cash equivalents, short-term investments, credit
facility position, projected cash flow generated from current operations and
cash provided by the sale of the Company's UK subsidiary is expected to
adequately finance the Company's non-discretionary capital and debt service
requirements for the next twelve months as well as the purchase of the rigs
from Noble Drilling Corporation.

OTHER MATTERS

     The Company's financial condition and results of operations depend on the
level of spending by oil and gas companies for exploration, development and
production activities. There-fore, a sustained increase or decrease in the
price of oil or natural gas, which could have a material impact on exploration,
development and production activities, could materially affect the Company's
financial condition and results of operations.

     In March 1995, the Financial Accounting Standards Board issued Statement
of Financial Accounting Standards No. 121 ("SFAS 121"), Accounting for the
Impairment of Long-Lived Assets and for Long-Lived Assets to Be Disposed Of.
SFAS 121 is effective for fiscal years beginning after December 15, 1995. The
Company will adopt SFAS 121 at the beginning of fiscal year 1997. It is
anticipated that the impact of adopting this statement will not have a material
effect on the financial statements.

     In October 1995, the Financial Accounting Standards Board issued Statement
of Financial Accounting Standards No. 123 ("SFAS 123"), Accounting for
Stock-Based Compensation. SFAS 123 is effective for fiscal years beginning
after December 15, 1995. The Company will adopt the pro forma disclosure
provisions of SFAS 123 in fiscal year 1997.

                                      22
<PAGE>   37
REPORT OF INDEPENDENT ACCOUNTANTS       NABORS INDUSTRIES, INC. AND SUBSIDIARIES

TO THE STOCKHOLDERS AND BOARD OF DIRECTORS 
OF NABORS INDUSTRIES, INC.

     We have audited the accompanying consolidated balance sheets of Nabors
Industries, Inc. and Subsidiaries as of September 30, 1996 and 1995, and the
related consolidated statements of income, changes in stockholders' equity, and
cash flows for each of the three years in the period ended September 30, 1996.
These financial statements are the responsibility of the Company's management.
Our responsibility is to express an opinion on these financial statements based
on our audits.

     We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of
material misstatement. An audit includes examining, on a test basis, evidence
supporting the amounts and disclosures in the financial statements. An audit
also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.

     In our opinion, the financial statements referred to above present fairly,
in all material respects, the consolidated financial position of Nabors
Industries, Inc. and Subsidiaries as of September 30, 1996 and 1995, and the
consolidated results of their operations and their cash flows for each of the
three years in the period ended September 30, 1996, in conformity with
generally accepted accounting principles.




Coopers & Lybrand L.L.P.



Houston, Texas
November 25, 1996, except as to certain information presented 
in Notes 9 and 15, for which date is December 20, 1996

                                      23
<PAGE>   38
CONSOLIDATED BALANCE SHEETS             NABORS INDUSTRIES, INC. AND SUBSIDIARIES
(In thousands, except per share amounts)

<TABLE>
<CAPTION>
                                                                                 September 30,
ASSETS                                                                         1996        1995 
- ------                                                                       --------    --------
<S>                                                                          <C>         <C>     
Current assets:
  Cash and cash equivalents                                                  $ 95,867    $ 12,038
  Marketable securities                                                         8,160       3,296
  Accounts receivable, net                                                    172,720     132,482
  Inventory and supplies                                                       18,528      14,079
  Prepaid expenses and other current assets                                    33,259      21,550
                                                                             --------    --------
    TOTAL CURRENT ASSETS                                                      328,534     183,445
Property, plant and equipment, net                                            511,203     393,464
Marketable securities                                                          11,839       9,645
Other long-term assets                                                         19,698       6,718
                                                                             --------    --------
    TOTAL ASSETS                                                             $871,274    $593,272
                                                                             --------    --------

LIABILITIES AND STOCKHOLDERS' EQUITY
- ------------------------------------
Current liabilities:
  Current portion of long-term obligations                                   $  7,738    $ 11,158
  Short-term borrowings                                                        10,235      30,684
  Trade accounts payable                                                       64,955      53,891
  Accrued liabilities                                                          64,063      48,944
  Income taxes payable                                                          9,452       4,876
                                                                             --------    --------
    TOTAL CURRENT LIABILITIES                                                 156,443     149,553
Long-term obligations                                                         229,504      51,478
Other long-term liabilities                                                     9,139       7,643
Deferred income taxes                                                          18,366      15,848
                                                                             --------    --------
    TOTAL LIABILITIES                                                         413,452     224,522
                                                                             --------    --------

Commitments and contingencies

Stockholders' equity:
  Preferred stock, par value $.10 per share:
    Authorized 10,000 shares; none issued or outstanding                         --          --
  Capital stock, par value $.10 per share:
    Authorized common shares 200,000 in 1996 and 1995;
      issued 87,470 in 1996 and 85,017 in 1995                                  8,747       8,502
    Authorized Class B shares 8,000; none issued or outstanding                  --          --
  Capital in excess of par value                                              250,995     229,267
  Cumulative translation adjustment                                            (2,692)     (2,670)
  Net unrealized gain on marketable securities                                  3,728         354
  Retained earnings since May 1, 1988                                         200,208     138,091
  Less treasury stock, at cost, 489 and 755 common shares in 1996 and 1995     (3,164)     (4,794)
                                                                             --------    --------
    TOTAL STOCKHOLDERS' EQUITY                                                457,822     368,750
                                                                             --------    --------
    TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY                               $871,274    $593,272
                                                                             --------    --------
</TABLE>

                The accompanying notes are an integral part of
                   these consolidated financial statements.

                                      24
<PAGE>   39

CONSOLIDATED STATEMENTS OF INCOME       NABORS INDUSTRIES, INC. AND SUBSIDIARIES

(In thousands, except per share amounts)

<TABLE>
<CAPTION>
                                                             Year Ended September 30,
                                                          1996        1995        1994
                                                        --------    --------    --------
<S>                                                     <C>         <C>         <C>     
Revenues                                                $719,743    $572,788    $484,268
                                                        --------    --------    --------
Operating expenses:
  Direct costs                                           539,665     434,097     369,677
  General and administrative expenses                     56,862      49,094      49,365
  Depreciation and amortization                           46,117      31,042      26,241
  Provision for reduction in carrying value of assets       --          --        29,686
                                                        --------    --------    --------
    Operating expenses                                   642,644     514,233     474,969
                                                        --------    --------    --------
Operating income                                          77,099      58,555       9,299
                                                        --------    --------    --------
Other income (expense):
  Interest expense                                       (11,884)     (7,611)     (8,237)
  Interest income                                          2,695       1,694       2,459
  Gain on sales of long-term assets                        2,462       1,404       2,010
  Other income, net                                       11,228       4,586         708
                                                        --------    --------    --------
    Other income (expense)                                 4,501          73      (3,060)
                                                        --------    --------    --------
Income before income taxes                                81,600      58,628       6,239
                                                        --------    --------    --------
Income taxes:
  Current                                                  8,488       4,913       4,139
  Deferred                                                 2,612       2,611         750
                                                        --------    --------    --------
    Total income taxes                                    11,100       7,524       4,889
                                                        --------    --------    --------
Net income                                              $ 70,500    $ 51,104    $  1,350
                                                        --------    --------    --------
Earnings per share:
  Primary                                               $    .76    $    .58    $    .02
                                                        --------    --------    --------
  Fully diluted                                         $    .75    $    .57    $    .02
                                                        --------    --------    --------
Weighted average number of shares outstanding:
  Primary                                                 93,162      88,018      85,620
                                                        --------    --------    --------
  Fully diluted                                           93,917      90,237      85,743
                                                        --------    --------    --------
</TABLE>

                The accompanying notes are an integral part of
                   these consolidated financial statements.

                                      25
<PAGE>   40
                                        NABORS INDUSTRIES, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY

(In thousands)

<TABLE>
<CAPTION>
                                                                                           Net
                                                                  Capital               Unrealized
                                                  Common Stock   in Excess  Cumulative   Gain on                           Total
                                               ------------------  of Par  Translation  Marketable  Retained Treasury  Stockholders'
                                               Shares   Par Value   Value   Adjustment  Securities  Earnings   Stock      Equity
                                               ------   -------- ---------  ----------  ----------  -------- --------  ------------
<S>                                            <C>      <C>       <C>        <C>         <C>        <C>      <C>         <C>     
BALANCES, SEPTEMBER 30, 1993                   83,376   $ 8,338   $211,985   $ (3,660)   $   --     $ 94,211 $ (3,283)   $307,591
Adjustment to conform Sundowner                                                                              
  to Nabors' fiscal year-end                                                                            (396)                (396) 
Net income                                                                                             1,350                1,350  
Translation adjustment                                                            912                                         912  
Net unrealized gain on marketable securities                                                1,345                           1,345  
Issuance of common shares and treasury stock                                                                 
  for stock options exercised and employee                                                                   
  benefit plans                                   168        16      1,021                                        188       1,225
Issuance of common shares for stock awards        110        11        627                                                    638
Issuance of common shares in connection                                                                      
  with acquisition of mutual fund assets          729        73      4,686                                                  4,759
                                               ------   -------   --------   --------    --------   -------- --------    --------
BALANCES, SEPTEMBER 30, 1994                   84,383     8,438    218,319     (2,748)      1,345     95,165   (3,095)    317,424
Net income                                                                                            51,104               51,104
Translation adjustment                                                             78                                          78
Reclassification of pre-quasi-reorganization                                                                 
  tax benefit                                                        8,178                            (8,178)                --
Net unrealized loss on marketable securities                                                 (991)                           (991) 
Issuance of common shares for stock                                                                          
  options exercised                               505        51      2,012                                                  2,063
Issuance of common shares for stock awards        129        13        758                                                    771
Repurchase of common shares                                                                                    (1,699)     (1,699) 
                                               ------   -------   --------   --------    --------   -------- --------    --------
BALANCES, SEPTEMBER 30, 1995                   85,017     8,502    229,267     (2,670)        354    138,091   (4,794)    368,750
Net income                                                                                            70,500               70,500
Translation adjustment                                                            (22)                                        (22) 
Reclassification of pre-quasi-reorganization                                                                 
  tax benefit                                                        8,383                            (8,383)                --
Net unrealized gain on marketable securities                                                3,374                           3,374
Issuance of common shares for stock                                                                          
  options exercised                             2,422       242     11,769                                                 12,011
Issuance of common shares for stock awards         31         3        214                                                    217
Issuance of treasury stock in connection with                                                                
  acquisition of assets                                              2,370                                      1,630       4,000
Repurchase of Company warrants                                      (1,008)                                                (1,008)
                                               ------   -------   --------   --------    --------   -------- --------    --------
BALANCES, SEPTEMBER 30, 1996                   87,470   $ 8,747   $250,995   $ (2,692)   $  3,728   $200,208 $ (3,164)   $457,822
                                               ------   -------   --------   --------    --------   -------- --------    --------
</TABLE>

                The accompanying notes are an integral part of
                   these consolidated financial statements.

                                      26
<PAGE>   41
                                        NABORS INDUSTRIES, INC. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

<TABLE>
<CAPTION>
                                                                    Year Ended September 30,
                                                                  1996        1995        1994
                                                                --------    --------    --------
<S>                                                             <C>         <C>         <C>     
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income                                                      $ 70,500    $ 51,104    $  1,350
Adjustments to net income:
  Depreciation and amortization                                   46,117      31,042      26,241
  Provision for reduction in carrying value of assets               --          --        29,686
  Deferred taxes                                                   2,612       2,611         750
  Gain on sales of long-term assets                               (2,462)     (1,404)     (2,010)
  Gain on insurance claims                                        (4,693)     (4,649)       (484)
  Gain on marketable securities                                   (4,871)     (2,406)       (908)
  Foreign currency transaction and translation (gains) losses       (510)      3,160       1,502
  Non-cash compensation element of stock awards and options          152         476       1,051
  Equity in earnings of affiliate                                   (139)       --          --
  Other                                                              201        (207)       (137)
(Decrease) increase, net of effects from acquisitions,
 from changes in:
  Accounts receivable                                            (21,089)    (13,715)        160
  Inventory and supplies                                          (4,149)        962        (811)
  Prepaid expenses and other current assets                       (7,968)     (2,723)      1,274
  Other long-term assets                                          (7,699)       (792)      1,721
  Accounts payable and accrued liabilities                        12,005      12,895      (8,486)
  Income taxes payable                                             4,576       2,497        (295)
  Other long-term liabilities                                      1,541      (5,085)       (395)
                                                                --------    --------    --------
NET CASH PROVIDED BY OPERATING ACTIVITIES                         84,124      73,766      50,209
                                                                --------    --------    --------
CASH FLOWS FROM INVESTING ACTIVITIES:
  Purchases of marketable securities, held-to-maturity              --        (5,121)    (39,762)
  Maturities of marketable securities, held-to-maturity            2,000      21,254      10,000
  Sales of marketable securities, held-to-maturity                  --        12,416        --
  Purchases of marketable securities, available-for-sale            --        (2,273)    (12,617)
  Sales of marketable securities, available-for-sale               1,698       5,189       2,597
  Purchases of marketable securities, trading                    (11,280)       --          --
  Sales of marketable securities, trading                          8,766        --          --
  Payments received on investment in sales-type
    leases and notes receivable                                     --          --         1,541
  Cash paid for acquisitions, net                                (28,317)    (19,572)       --
  Capital expenditures                                          (146,440)   (109,321)    (62,907)
  Proceeds from sales of assets and insurance claims              15,726      10,039       5,315
  Investment in affiliates                                        (2,548)       --          --
                                                                --------    --------    --------
NET CASH USED FOR INVESTING ACTIVITIES                          (160,395)    (87,389)    (95,833)
                                                                --------    --------    --------
Cash flows from financing activities:
  Decrease (increase) in restricted cash                             861        (795)        (44)
  Long-term borrowings                                           183,295       4,538       6,537
  Reduction of long-term obligations                             (14,633)    (20,317)    (26,762)
  (Decrease) increase in short-term borrowings                   (20,449)     19,522         453
  Common stock and treasury stock transactions                    11,026         150      24,951
                                                                --------    --------    --------
NET CASH PROVIDED BY FINANCING ACTIVITIES                        160,100       3,098       5,135
                                                                --------    --------    --------
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS              83,829     (10,525)    (40,489)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR                      12,038      22,563      63,052
                                                                --------    --------    --------
CASH AND CASH EQUIVALENTS, END OF YEAR                          $ 95,867    $ 12,038    $ 22,563
                                                                --------    --------    --------
</TABLE>

                The accompanying notes are an integral part of
                   these consolidated financial statements.
                                      27
<PAGE>   42
                                        NABORS INDUSTRIES, INC. AND SUBSIDIARIES
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1 SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

NATURE OF OPERATIONS

     Nabors Industries, Inc. (collectively with its subsidiaries, "Nabors" or
the "Company") is the largest land drilling contractor in the world. The
Company, which was incorporated in Delaware in 1978, has principally been
engaged, through its subsidiaries, in oil, gas and geothermal land drilling
operations in Alaska, the US Lower 48 states and Canada, and internationally in
the Middle East, the Far East, the CIS, North and West Africa and South and
Central America. The Company also provides offshore drilling, well servicing
and workover services in the Gulf of Mexico, Alaska's Cook Inlet and several
international markets. The Company's CANRIG subsidiary manufactures top drives
for a broad range of drilling rig applications. The Company also provides
oilfield management, engineering, transportation, construction, maintenance,
well logging and other support services in selected domestic and international
markets.

PRINCIPLES OF CONSOLIDATION

     The consolidated financial statements of the Company include the accounts
of the Company and all subsidiaries. All significant intercompany accounts and
transactions are eliminated in consolidation. The Company has an investment
representing a 33 1/3% ownership interest in a company which is accounted for
using the equity method.

     The Company's investments in several joint ventures are accounted for
under the proportionate consolidation method. The Company's proportionate share
of the joint ventures' net assets and net income was as follows:

<TABLE>
<CAPTION>
                                                      September 30,
(In thousands)                             1996            1995            1994
                                         -------         -------         -------
<S>                                      <C>             <C>             <C>    
Net assets                               $27,895         $22,755         $17,580
Net income                                 6,464           4,868           4,386
                                         -------         -------         -------
</TABLE>

CASH AND CASH EQUIVALENTS

     Cash and cash equivalents include commercial paper and various other
short-term investments with an original maturity of three months or less at the
time of purchase.

MARKETABLE SECURITIES

     The Company's marketable securities consist of debt securities, including
United States Government securities, and equity securities. Marketable debt
securities that are classified as held-to-maturity are stated at amortized
cost, which approximates market, and marketable securities that are classified
as available-for-sale or trading are stated at fair value. Unrealized holding
gains and losses for available-for-sale securities are excluded from earnings
and, until realized, are reported as a net amount in a separate component of
stockholders' equity. Unrealized gains and losses on securities classified as
trading are reported in earnings currently.

     In computing realized gains and losses on the sale of equity securities,
the cost of the equity securities sold is determined using the specific cost of
the security when originally purchased.

INVENTORY AND SUPPLIES

     Inventory and supplies are composed of replacement parts and supplies held
for use in the operations of the Company, and top drives that are manufactured
by a Company subsidiary for resale. Inventory and supplies are valued at the
lower of weighted average cost or market.

PROPERTY, PLANT AND EQUIPMENT

     Property, plant and equipment are stated at cost. The Company provides for
depreciation of drilling rigs on the unit-of-production method over a 3,800-day
period after provision for salvage value. To provide for any deterioration that
may occur while the rigs are not operating for an extended period of time, a
minimum depreciation charge is provided for using the straight-line method over
an assumed depreciable life of 20 years. Depreciation on buildings, oilfield
hauling and mobile equipment and other machinery and equipment is computed
using the straight-line method over the estimated useful lives of the assets
after provision for salvage value (buildings -- 10 to 30 years; oilfield
haul-ing and mobile equipment and other machinery and equipment -- 3 to 10
years). Maintenance and repairs are charged to expense when incurred; renewals
and betterments are capitalized. Amortization of capitalized leases is included
in depreciation and amortization expense. Interest applicable to the
construction of drilling and other equipment is capitalized. Provisions for
permanent asset impairment are charged to income when it is considered probable
that the carrying values of equipment may not be recovered over their remaining
service lives, based on estimates of future net cash flows on an undiscounted
basis. Upon retirement or other disposal of fixed assets, the cost and related
accumulated depreciation are removed from the respective accounts, and any
gains or losses are included in results of operations.

     In March 1995, the Financial Accounting Standards Board ("FASB") issued
Statement of Financial Accounting Standards No. 121 ("SFAS 121"), Accounting
for the Impairment of Long-Lived Assets and for Long-Lived Assets to Be
Disposed Of. SFAS 121, which is effective for fiscal years beginning 

                                      28
<PAGE>   43

after December 15, 1995, requires that long-lived assets and certain
identifiable intangibles held and used by an entity be reviewed for impairment
whenever events or changes in circumstances indicate that the carrying amount
of an asset may not be recoverable. The Company will adopt SFAS 121 at the
beginning of 1997. It is anticipated that the impact of adopting this statement
will not have a material effect on the financial statements.

INCOME TAXES

     The Company utilizes the asset and liability method in accounting for
income taxes that requires the recognition of deferred tax assets and
liabilities for the expected future tax consequences of events that have been
recognized in the Company's financial statements or tax returns.

     United States deferred income taxes have not been provided on unremitted
earnings of subsidiaries located outside the United States, as such earnings
are considered permanently reinvested.

REVENUE RECOGNITION

     Revenues and costs on daywork contracts are recognized daily
(percentage-of-completion method); revenues and costs applicable to footage and
turnkey contracts are recognized on completion of the well (completed contract
method) and revenues and related costs for the manufacturing operation are
recognized when products are shipped or services are rendered to the customer.

FOREIGN CURRENCY TRANSLATION

     For certain foreign subsidiaries, such as those in the United Kingdom,
Canada and Saudi Arabia, the local currency is the functional currency. Assets
and liabilities are translated at year-end exchange rates, and income and
expenses are translated at the average exchange rates prevailing during the
year. Translation gains or losses are accumulated in a separate section of
stockholders' equity and transaction gains and losses are included in net
income. For subsidiaries operating in highly inflationary countries, such as
Venezuela, and for certain other subsidiaries, the US dollar is the functional
currency and translation gains and losses are included in determining net
income.

     The Company utilizes forward exchange contracts and local currency
borrowings to hedge its exposure to exchange rate fluctuations in connection
with monetary assets and liabilities held in foreign currencies. The carrying
amounts of the forward exchange contracts equal their fair value and are
adjusted at each balance sheet date for changes in exchange rates. Realized and
unrealized gains and losses on the forward contracts are deferred and
recognized as foreign currency gains or losses over the life of the contract.
The Company does not hold or issue foreign exchange contracts or other
derivative financial instruments for speculative purposes. To hedge its foreign
currency exposure in Saudi Arabia, the Company holds forward exchange contracts
maturing at various dates through June 30, 1999 with a face value of
approximately $39.7 million at September 30, 1996. Unrealized losses associated
with these forward contracts amount to $.3 million at September 30, 1996.

     Foreign currency transaction and translation gains (losses) for 1996, 1995
and 1994 totaled $.5 million, ($3.2) million and ($1.5) million, respectively,
and are included in the caption "Other income, net" in the accompanying
consolidated statements of income. In December 1995, the Venezuelan bolivar
devalued by approximately 71%, from an official fixed exchange rate of 170
bolivars to 290 bolivars to the US dollar. As a result of the devaluation, the
Company recognized a translation gain of $.3 million during 1996, as the
Company had a bolivar denominated net monetary liability position. In April
1996, the Venezuelan government, as part of moving toward a free market
economy, eliminated exchange rate control policies that had been established in
June 1994. As a result, the bolivar was allowed to float, and devalued by an
additional 55% to 70% as the exchange rate ranged from 450 to 500 bolivars to
the US dollar. The Company recognized an insignificant translation gain during
the third quarter of 1996 as a result of the devaluation. During 1996, the
Company reduced its net monetary position by borrowing in the local currency.
The Company increased its exposure to foreign currency devaluation in Saudi
Arabia during 1996 as a result of increased activity there resulting from a
number of new drilling contracts. The Company, through the use of forward
exchange contracts has offset a portion of the foreign exchange exposure in
Saudi Arabia. The Company will continue to monitor its foreign currency
exposures.

     The 1995 losses include $2.5 million in the UK North Sea relating to
foreign currency losses that were deferred and recognized as part of the
specific transactions hedged. During 1994, the Venezuelan bolivar devalued by
approximately 75%, as compared to the US dollar. During June 1994, the
Venezuelan government imposed exchange rate control policies and an official
fixed rate of 170 bolivars to the US dollar. As a result of the devaluation,
the Company recorded translation losses totaling $1.0 million during 1994. The
Company also recorded amortization of deferred currency losses in the UK North
Sea during 1994.

EARNINGS PER SHARE

     The Company's earnings per share are based upon the weighted average
number of common shares ("Shares") outstanding during the year, excluding
Shares held in treasury. Shares reserved for issuance against stock options
outstanding under the Company's stock option plans and stock warrants issued
are considered common stock equivalents if dilutive.

                                      29
<PAGE>   44

CASH FLOW INFORMATION

     Cash paid for income taxes and interest during 1996, 1995 and 1994 was as
follows:

<TABLE>
<CAPTION>
(In thousands)                                 1996          1995          1994
                                              ------        ------        ------
<S>                                           <C>           <C>           <C>   
Income taxes                                  $3,160        $5,045        $2,765
Interest, net of
  capitalized interest                         9,309         7,064         7,818
                                              ------        ------        ------
</TABLE>

     A summary of the Company's non-cash activities during 1996, 1995 and 1994
is as follows:

<TABLE>
<CAPTION>
(In thousands)                                1996           1995         1994
                                            --------       --------       ------
<S>                                         <C>            <C>            <C> 
Acquisition of businesses:
  Fair value of assets acquired
    less negative goodwill                  $ 50,400       $ 39,385       $ --
  Goodwill                                     3,825           --           --
  Consideration paid:
    Cash                                     (29,051)       (20,000)        --
    Treasury shares issued                    (4,000)          --           --
                                            --------       --------       ------
    Liabilities assumed
      or created                              21,174         19,385         --
Common stock issued to a
  mutual fund in exchange
  for the Company's shares                      --             --         83,135
                                            --------       --------       ------
</TABLE>

CONCENTRATIONS OF CREDIT RISK

     Financial instruments that potentially subject the Company to
concentrations of credit risk consist primarily of investments in commercial
paper with maturities of less than three months, and other temporary cash
investments that the Company has with a variety of companies and financial
institutions with strong credit ratings. The Company believes that, due to the
foregoing, the credit risk in such instruments is minimal. In addition, the
Company's trade receivables are with a variety of international and national
oil companies. Management considers this credit risk to be limited due to these
companies' financial resources.

FAIR VALUE OF FINANCIAL INSTRUMENTS

     The following methods and assumptions were used to estimate the fair value
of each class of financial instrument:

o CASH AND CASH EQUIVALENTS The carrying amount approximates fair value due to
the relatively short period to maturity of these instruments.

o MARKETABLE SECURITIES The carrying amount of marketable securities are
adjusted to fair value based on quoted market prices.

o SHORT-TERM BORROWINGS The carrying amount approximates fair value due to the
relatively short period to maturity of these instruments.

o FORWARD EXCHANGE CONTRACTS The carrying amount of forward exchange contracts
are adjusted to fair value based on quoted exchange rates.

o LONG-TERM DEBT The fair value of the Company's long-term debt is estimated
based on quoted market prices, where applicable, or based on the present value
of expected cash flows relating to existing borrowings discounted at rates
currently available to the Company for long-term borrowings with similar terms
and maturities. The fair value of the Company's long-term debt as of September
30, 1996 and 1995 amounted to $243.2 million and $66.8 million, respectively.

USE OF ESTIMATES

     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions. These estimates and assumptions affect the reported amounts of
assets and liabilities and the disclosure of contingent assets and liabilities
at the date of the financial statements and the reported amounts of revenues
and expenses during the reporting period. Actual results could differ from
those estimates.

RECLASSIFICATION

     Certain prior year amounts were reclassified to conform to the
presentation in the current year.

2 ACQUISITIONS

     During April 1996, the Company acquired Exeter Drilling Company ("Exeter")
and its subsidiary, JW Gibson Well Service Company ("Gibson") from Occidental
Oil and Gas Corporation. The consideration paid consisted of $18.0 million in
cash, $4.0 million of Nabors common stock (266,223 shares) and $10.6 million
paid in cash for Exeter's and Gibson's working capital. Exeter's land drilling
rig fleet consisted of 47 actively marketed rigs in the United States, and two
located internationally. Gibson operated 78 workover and well servicing land
rigs located in the United States. The acquisition was accounted for under the
purchase method of accounting; accordingly, the total purchase price was
allocated to net assets based on estimated fair values. The results of Exeter's
and Gibson's operations have been included in the consolidated financial
statements of the Company commencing on the effective date of the acquisition.

                                      30
<PAGE>   45

     During January 1995, the Company acquired Delta Drilling Company
("Delta"), a company engaged in the business of contract land drilling in the
United States. The purchase price of Delta was approximately $20.0 million in
cash plus liabilities assumed. Delta owned 30 rigs as well as yard and office
facilities. The acquisition was accounted for under the purchase method of
accounting. The results of Delta's operations have been included in the
consolidated financial statements commencing on the effective date of the
acquisition.

     During October 1994, the Company consummated its merger with Sundowner, a
company that provides contract well servicing and workover services in the Gulf
of Mexico and various international offshore markets and utilizes
self-contained, modular platform rigs and jackup workover rigs. Under the
merger agreement, Sundowner stockholders received 2.8 shares of the Company's
common stock for each of their shares of Sundowner. As a result, the Company
issued 13,081,600 common shares to Sundowner stockholders.

     The merger was accounted for as a pooling-of-interests. Accordingly, the
accompanying consolidated financial statements were retroactively restated to
include the results of operations, financial position and cash flows of
Sundowner for all periods prior to consummation of the merger. In addition to
combining the companies' historical operations, the accompanying consolidated
financial statements include adjustments to Sundowner's deferred income tax
expense to reflect the combined companies' use of the Company's operating loss
carryforwards for US federal income tax purposes. Such adjustments resulted in
a reduction in US federal deferred income tax expense in the combined
companies' statement of operations. Earnings per common share for each period
are based on the combined weighted average number of common shares outstanding
after adjusting Sundowner's historical amounts for the conversion into 2.8
shares of the Company's common stock.

     Operating results for the separate companies for the period prior to the
merger are as follows:

<TABLE>
<CAPTION>
                                                           September 30, 1994
(In thousands)                                         Revenues        Net Income
                                                       --------        ----------
<S>                                                    <C>              <C>     
Nabors                                                 $422,551         $    650
Sundowner                                                61,717              148
Deferred income tax adjustment                                               552
                                                       --------         --------
                                                       $484,268         $  1,350
                                                       --------         --------
</TABLE>

3 MARKETABLE SECURITIES

     Marketable securities classified as current and long-term assets are as
follows:

<TABLE>
<CAPTION>
                                                                September 30,
(In thousands)                                                 1996       1995
                                                             --------   --------
<S>                                                          <C>        <C>     
Current assets:
  Debt securities, classified as held-to-
    maturity, at amortized cost, which
    approximates fair value:
      US Government securities                               $    --    $  2,002
  Equity securities, classified as trading,
    at fair value                                               8,160      1,294
                                                             --------   --------
                                                                8,160      3,296
                                                             --------   --------
Long-term assets:
Equity securities, classified as
  available-for-sale, at fair value                          $ 11,839   $  9,645
                                                             --------   --------
</TABLE>

     The fair value of equity securities that were classified as
available-for-sale exceeded the cost by approximately $3.7 million and $.4
million as of September 30, 1996 and 1995, respectively. During 1996, the
Company received $1.7 million of proceeds and realized gains of $.5 million,
and received $8.8 million of proceeds and realized gains of $1.9 million
resulting from the sale of certain investments in equity securities that had
been classified as available-for-sale and trading, respectively. During 1996,
the Company recorded unrealized holding gains totaling $2.5 million on equity
securities classified as trading.

     During 1995, the Company sold debt securities with an amortized cost of
$12.6 million and recorded a loss of $.2 million. The debt securities
previously had been classified as held-to-maturity and were sold to fund the
acquisition of Delta. During 1995, the Company recorded a gain totaling $2.4
million and received $6.3 million of proceeds in a combination of shares,
warrants and cash in settlement of the tender offer for the Company's
investment in certain equity securities and from other sales of equity
securities classified as available-for-sale. During 1995, the Company recorded
unrealized holding gains totaling $.2 million on equity securities classified
as trading.

     During 1994, the Company received $2.6 million of proceeds and realized a
gain of $.9 million resulting from the sale of certain investments in equity
securities that had been classified as available-for-sale.

                                      31
<PAGE>   46

4 Property, Plant and Equipment

The major components of property, plant and equipment are as follows:

<TABLE>
<CAPTION>
                                                              September 30,
(In thousands)                                              1996         1995
                                                          --------     --------
<S>                                                       <C>          <C>     
Land                                                      $  3,986     $  3,828
Buildings                                                   14,891       13,735
Contract drilling and related equipment                    680,050      525,423
Oilfield hauling and mobile equipment                       43,077       42,834
Other machinery and equipment                               20,070       19,994
                                                          --------     --------
                                                           762,074      605,814
Less: accumulated depreciation
  and amortization(1)                                     (250,871)    (212,350)
                                                          --------     --------
                                                          $511,203     $393,464
                                                          --------     --------
</TABLE>

(1)  Includes, as of September 30, 1996 and 1995, reserves of $54.8 million and
     $56.3 million, respectively, resulting from the permanent impairment of
     certain asset values.

     Repair and maintenance expense included in direct costs in the statements
of income amounted to $81.4 million, $63.2 million and $49.2 million for the
years ended September 30, 1996, 1995 and 1994, respectively.

     Interest expense of $1.0 million, $.7 million and $.4 million was
capitalized during 1996, 1995 and 1994, respectively.

5 PROVISION FOR REDUCTION IN CARRYING VALUE OF ASSETS

     During the third quarter of 1994, the Company recorded a provision for
reduction in carrying value of assets totaling $29.7 million. The assets
primarily affected were the Company's Yemen logistical assets and inventory.
The provision also included estimates of facility closure costs and other costs
in certain international areas, including Yemen. The determining factor
resulting in the provision for reduction in carrying value of assets was the
general reduction of activity in Yemen, further exacerbated by the civil war
there.

6 SHORT-TERM BORROWINGS AND LETTERS OF CREDIT

     The Company has available lines of credit with a number of banks that
permit borrowing at interest rates generally not to exceed, at the option of
the Company, each bank's prime rate or LIBOR plus .75%. The weighted average
interest rate on short-term borrowings outstanding as of September 30, 1996 and
1995, excluding short-term borrowings in the local currency for hedging
purposes in Venezuela, equaled 5.65% and 6.76%, respectively. The weighted
average interest rate inclusive of the Venezuela borrowings outstanding as of
September 30, 1996, equaled 13.35%.

     Availability and borrowings under these lines of credit are as follows:

<TABLE>
<CAPTION>
                                                                September 30,
(In thousands)                                               1996         1995
                                                           --------     --------
<S>                                                        <C>          <C>     
Lines of credit available                                  $ 66,120     $ 53,391
Short-term borrowings outstanding                            10,235       28,440
Letters of credit outstanding                                11,657        9,853
                                                           --------     --------
</TABLE>

7 LONG-TERM OBLIGATIONS

Long-term obligations consist of the following:


<TABLE>
<CAPTION>
                                                              September 30,
(In thousands)                                             1996          1995
                                                         --------      --------
<S>                                                      <C>           <C>     
5.00% Convertible Subordinated Notes
  payable in their entirety May 2006                     $172,500      $   --
9.18% Senior Secured Notes payable
  in semiannual installments of
  $4,000 commencing January 2002                           40,000        40,000
10.25% Senior Secured Notes payable
  in semiannual installments of
  $3,000 commencing July 1992, net                          5,936         8,782
$12,995 loans payable in varying
  amounts in August 1998, November
  1998, January 1999 and April 1999                        12,995         2,200
$5,000 loan payable in monthly
  installments of $76 commencing
  December 1995                                             4,242          --
$8,284 loan payable in quarterly
  installments of $295 commencing
  July 1990                                                  --           2,071
$5,100 loan payable in quarterly
  installments of $182 commencing
  July 1991                                                  --           2,003
$4,851 loan payable in quarterly
  installments of $173 commencing
  July 1993                                                  --           3,118
Medium-term notes payable, maturing
  from 1995 to 2001, from 6.0%
  to 8.75%(1)                                               1,567         4,068
Capital leases(1)                                               2           394
                                                         --------      --------
                                                          237,242        62,636
Less: current portion                                      (7,738)      (11,158)
                                                         --------      --------
                                                         $229,504      $ 51,478
                                                         --------      --------
</TABLE>

(1)  Certain of these obligations are collateralized by specific assets
     financed with the related proceeds. The aggregate net book value of such
     assets approximated $8.7 million and $12.5 million as of September 30,
     1996 and 1995, respectively.

                                      32
<PAGE>   47

     On May 28, 1996, the Company issued $172.5 million of 5% Convertible
Subordinated Notes with a scheduled maturity on May 15, 2006 (the "5% Notes").
Interest on the 5% Notes is payable semi-annually on May 15 and November 15 of
each year commencing November 15, 1996. The 5% Notes are convertible into
common shares of the Company at any time, at a conversion price of $18.125 per
share, subject to an adjustment in certain events. The 5% Notes are redeemable
at the option of the Company, in whole or in part, at any time on or after May
15, 1999, initially at 103.5% and at decreasing prices thereafter to 100% at
maturity, in each case together with accrued and unpaid interest. The 5% Notes
also may be repaid at the option of the holder at 101%, together with accrued
and unpaid interest, any time prior to May 15, 2006 if there is a change in
control, as defined in the subordinated indenture. The proceeds from the 5%
Notes were used to repay several term loans and reduce outstanding borrowings
on the Company's credit facilities. The remaining proceeds will be used for
general corporate purposes, including working capital.

     The Company issued 9.18% Senior Secured Notes due July 31, 2006 in the
principal amount of $40.0 million (the "9.18% Senior Secured Notes") to the
John Hancock Mutual Life Insurance Company ("John Hancock"), pursuant to an
Amended and Restated Note Purchase Agreement dated October 1, 1992.

     The Company substantially financed the 1990 acquisition of Loffland
Brothers Company through certain of its subsidiaries issuing $30.0 million of
10.25% Senior Secured Notes due January 31, 1997 (the "10.25% Senior Secured
Notes") to John Hancock. The Company also issued warrants to the same financial
institution to purchase 1,500,000 shares of the Company's common stock at $5.50
per share, exercisable until January 31, 1997 (the "Warrants"). A value of $1.1
million was assigned to the Warrants.

     The 9.18% Senior Secured Notes and the 10.25% Senior Secured Notes
(collectively "Senior Secured Notes") impose certain restrictions on the
Company, including restrictions on the payments of dividends and certain
business combinations. The Company may pay dividends to the extent the
Company's cumulative dividends, plus certain other payments since March 31,
1989, do not exceed 50% of the Company's cumulative net income since March 31,
1989, plus the proceeds of any offering of equity securities of the Company
that are not redeemable at the option of the holder of the securities. As of
September 30, 1996, retained earnings available for dividend totaled
approximately $178 million. Also, proceeds from the sale of certain assets must
be used to prepay the Senior Secured Notes to the extent that an amount equal
to such proceeds is not invested by the Company during a two-year period. The
Senior Secured Notes also require that certain financial tests be met on a
consolidated Company basis, the most restrictive of which requires working
capital to be in excess of $5.0 million. The Senior Secured Notes are
guaranteed by the Company and one of its subsidiaries and are collateralized by
the pledge of all the shares and assets of the Company's subsidiaries operating
in the UK North Sea, and of all the shares of one of the Company's subsidiaries
operating in the Gulf of Mexico. The aggregate book value of such net assets
approximated $27.9 and $29.7 million as of September 30, 1996 and 1995,
respectively. Interest on the Senior Secured Notes is payable semi-annually on
July 31 and January 31 of each year.

     During 1995, a subsidiary of the Company entered into a revolving loan
agreement with a financial institution whereby it can borrow up to $20.0
million for the construction of certain drilling equipment that is exported
from Canada by one of the Company's subsidiaries. The loan proceeds can be
drawn quarterly based on the amount of qualifying drilling equipment exported
from Canada during the immediately preceding three-month period and are due for
repayment three years after the date the individual advances are made. The
Company received its first advance totaling $2.2 million during August 1995,
and subsequent advances of $2.9 million, $3.7 million and $4.2 million in
November 1995, January 1996 and April 1996, respectively. The loans bear
interest at 90-day LIBOR plus .50% (6.19% at September 30, 1996). The loans are
collateralized by several drilling rigs located in the US with an aggregate net
book value of approximately $29.2 million and $27.4 million as of September 30,
1996 and 1995, respectively. The loans are guaranteed by the Company and
require the Company, on a consolidated basis, to maintain various financial
ratios, the most restrictive of which requires working capital to be in excess
of $5.0 million.

     As of September 30, 1996, the maturities of long-term obligations for the
five years after 1996 are as follows:

<TABLE>
<CAPTION>
                (In thousands)
                <S>                                <C>     
                1997                               $  7,738
                1998                                  3,531
                1999                                 12,205
                2000                                  1,226
                2001                                    106
                Thereafter                          212,436
                                                   --------
                                                   $237,242
                                                   ========
</TABLE>

                                      33
<PAGE>   48

8 INCOME TAXES

     The Company's income tax, reconciled to the United States federal income
tax using the federal statutory rate, and an analysis of the income tax
provision is as follows:

<TABLE>
<CAPTION>
                                                    Year Ended September 30,
(In thousands)                                    1996        1995        1994
                                                --------    --------    --------
<S>                                             <C>         <C>         <C>     
Total pretax income(1)                          $ 81,600    $ 58,628    $  6,239
                                                --------    --------    --------
Expected federal income
  tax using the 35%
  statutory rate                                  28,560      20,520       2,184
Recognition of net loss
  carryforwards and valuation allowance          (20,801)    (18,949)       --
Alternative Minimum Tax                              543         574          76
State income taxes                                   469         672         115
Foreign taxes and other                            2,329       4,707       2,514
                                                --------    --------    --------
    Total income tax                            $ 11,100    $  7,524    $  4,889
                                                --------    --------    --------
Analysis of the income
  tax provision:
    Current:
      US federal                                $    543    $    574    $     76
      State and local                                 15          72         115
      Foreign                                      7,930       4,267       3,948
                                                --------    --------    --------
                                                   8,488       4,913       4,139
                                                --------    --------    --------
    Deferred:
      State and local                                454         600        --
      Foreign                                      2,158       2,011         750
                                                --------    --------    --------
                                                   2,612       2,611         750
                                                --------    --------    --------
    Total income tax                            $ 11,100    $  7,524    $  4,889
                                                --------    --------    --------
</TABLE>

(1)  Includes foreign income before taxes of $17.2 million, $7.5 million and
     $6.7 million, respectively, in the years ended September 30, 1996, 1995
     and 1994.

     The components of the Company's net deferred tax assets and liabilities
are as follows:

<TABLE>
<CAPTION>
                                                             September 30,
(In thousands)                                           1996            1995
                                                       --------        --------
<S>                                                    <C>             <C>     
Deferred tax assets:
  Net operating loss carryforwards                     $ 59,653        $ 66,327
  Accrued liabilities not deducted
    for tax purposes                                     17,770          10,960
  General tax credits                                     3,207           5,455
                                                       --------        --------
Deferred tax asset                                       80,630          82,742
Valuation allowance                                     (25,869)        (35,563)
                                                       --------        --------
  Net deferred tax asset                                 54,761          47,179
Deferred tax liabilities:
  Excess tax over book depreciation                     (73,127)        (63,027)
                                                       --------        --------
Net deferred tax liability                             $(18,366)       $(15,848)
                                                       --------        --------
</TABLE>

     In conjunction with the acquisition of Delta (Note 2), deferred tax
liabilities of $10.3 million were recorded during 1995.

     For US federal income tax purposes, the Company has net operating loss
carryforwards of approximately $169.1 million that, if not utilized, will
expire from 1999 to 2009. The net operating loss carryforwards for Alternative
Minimum Tax purposes are approximately $126.1 million. There are Alternative
Minimum Tax credit carryforwards of $1.9 million available to offset future
regular tax liabilities. In addition, the Company has approximately $1.3
million of investment-tax-credit carryforwards expiring at various dates from
1997 to 2001.

     Under federal tax law, the amount and availability of loss carryforwards
(and certain other tax attributes) are subject to a variety of interpretations
and restrictive tests applicable to the Company and its subsidiaries. The
utilization of such carryforwards could be limited or effectively lost upon
certain changes in ownership. Accordingly, although the Company believes
substantial loss carryforwards are available to it, no assurance can be given
concerning such loss carryforwards, or whether or not such loss carryforwards
will be available in the future.

     A valuation allowance is provided to reduce the deferred tax assets to a
level which, more likely than not, will be realized. Primary factors considered
by management to determine the size of the allowance include the competitive
and cyclical nature of the Company's primary markets and the expiration timing
of the net operating loss carryforwards.

     The Company's accumulated deficit of $56.9 million as of May 1, 1988 was
eliminated by a transfer to paid-in capital through an accounting
reorganization of its stockholders' equity accounts (quasi-reorganization). The
quasi-reorganization did not involve any revaluation of assets or liabilities
because their fair values were, respectively, not less than or greater than
their book values.

     The Company adopted its quasi-reorganization in the context of its
reliance, at that time, on Statement of Financial Accounting Standards No. 96,
"Accounting For Income Taxes" ("SFAS 96"), which provided for recognition in
the statement of income, the tax benefits of operating loss and tax-credit
carryforward items that arose prior to a quasi-reorganization such as that
implemented by the Company.

     Subsequent to the issuance of SFAS 96 in September 1989, the Securities
and Exchange Commission issued Staff Accounting Bulletin No. 86 (SAB 86). This
bulletin set forth the SEC staff's view that the tax benefits of operating loss
and tax-credit carryforward items that arose prior to a quasi-reorganization
must be reported as a direct credit to paid-in capital following a
quasi-reorganization involving only an elimination of a deficit in retained
earnings.

                                      34
<PAGE>   49

     Since the Company implemented its quasi-reorganization based on SFAS 96
and prior to the issuance of SAB 86, it will continue to report carryforward
tax benefits directly in the statement of income, and then will reclassify the
amount of such benefit from retained earnings to paid-in capital. The SEC has
informed the Company that, under the circumstances, it will not object to the
Company's accounting for these tax benefits. If the provisions of SAB 86 had
been applied, net income for the years ended September 30, 1996 and 1995 would
have been reduced by $8.3 million ( $.09 per share) and $8.2 million ( $.09 per
share), respectively. Net income for the year ended September 30, 1994 would
not have been reduced.

     Statement of Financial Accounting Standards No. 109 "Accounting For Income
Taxes", which supersedes SFAS 96 and was adopted by the Company at the
beginning of 1994, includes a "grand-fathering" provision that permits the
Company to continue its present method of accounting for the utilization of its
operating loss and tax-credit carryforward items that arose before the
Company's 1988 quasi-reorganization.

9 CAPITAL STOCK AND STOCK OPTIONS

CAPITAL STOCK

     During June 1996, 1,100,000 warrants previously issued in connection with
the acquisition of the drilling assets of Grace Drilling Company expired.

     During April 1996, the Company issued 266,223 common shares that were
previously held in treasury to Occidental Oil and Gas Corporation in connection
with the Exeter acquisition (Note 2).

     During October 1995, the Company purchased for $1.0 million, 650,000
warrants that the Company had previously issued in connection with the purchase
of several drilling rigs in April 1994.

     During December 1994, the Company purchased 250,000 shares of its common
stock in the open market at a cost of $1.7 million or $6.80 per share.

     During October 1994, the Company completed its merger with Sundowner
whereby the Company acquired all of the outstanding shares of Sundowner in
exchange for 13,081,600 newly issued registered shares of the Company's common
stock (Note 2).

     During April 1994, the Company completed a transaction whereby it acquired
all of the assets of Equity Strategies Fund, Inc., an open-ended mutual fund
("ESI"), in exchange for 13,276,349 newly issued registered shares of the
Company's common stock. The ESI assets acquired comprised 12,548,733 shares of
the Company's common shares and $4.8 million in cash. The price at which the
Company's shares were exchanged was $6.625 per share, which was based upon an
average closing price of the Company's stock. The shares of common stock issued
to ESI then were distributed pro rata to the shareholders of ESI. The net
effect of the transaction was that the Company's common shares outstanding
increased by 727,616 shares and the Company received $4.8 million in cash.

     The Company is authorized to issue up to 10,000,000 shares of preferred
stock with a par value of $.10 per share in one or more series, and to fix the
powers, designations, preferences and rights to each series.

     During December 1996, the Company's Board of Directors rescinded the
Company's stock repurchase plan due to uncertainties regarding the Securities
and Exchange Commission's Staff Accounting Bulletin No. 96. Rescinding the plan
allows the Company to avoid potential issues when it uses the
pooling-of-interests method of accounting for mergers. The Company has not
repurchased any shares under the stock repurchase plan since its original
authorization during December 1995.

     As of September 30, 1996 there were warrants outstanding to purchase
1,500,000 common shares at $5.50 per share, exercisable until January 31, 1997.
As of September 30, 1995 there were warrants outstanding to purchase 1,500,000
common shares at $5.50 per share, exercisable until January 31, 1997;
1,100,000 common shares at $16.18 per share, exercisable until June 1996; and
650,000 common shares at $7.92 per share, exercisable until April 1996.

STOCK OPTION PLANS

     As of September 30, 1996, the Company has several stock option plans under
which options to purchase common shares may be granted to key officers,
directors and managerial employees of the Company and its subsidiaries. Options
granted under the plans generally are at prices equal to the fair market value
of the stock on the date of the grant. Options granted under the plans
generally are exercisable in varying cumulative periodic installments after one
year and cannot be exercised more than ten years from the date of grant.
Options to purchase 599,395 and 1,326,714 common shares remained available for
grant as of September 30, 1996 and 1995, respectively.

                                      35
<PAGE>   50

     A summary of stock option transactions during the three years ended
September 30, 1996 is as follows:

<TABLE>
<CAPTION>
                                                  Number        Price Range
(Share amounts in thousands)                    of Shares        per Share
                                                ---------        ---------
<S>                                              <C>         <C>    
Options outstanding
  September 30, 1993                             7,587       $.75 to $ 16.25
    Granted                                      1,437       5.00 to    7.50
    Exercised                                     (168)      1.07 to   6.875
    Forfeited                                     (137)      4.04 to   6.875
                                                -----------------------------
Options outstanding
  September 30, 1994                             8,719       $.75 to $ 16.25
    Granted                                      4,453       6.25 to    8.25
    Exercised                                     (505)      1.07 to   6.875
    Forfeited                                      (47)      4.77 to   6.875
                                                -----------------------------
Options outstanding
  September 30, 1995                            12,620       $.75 to $ 16.25
    Granted                                      2,339      7.188 to   14.50
    Exercised                                   (2,422)       .75 to   10.00
    Forfeited                                     (126)      6.25 to   14.50
                                                -----------------------------
Options outstanding
  September 30, 1996                            12,411       $.75 to $ 16.25
                                                -----------------------------
</TABLE>

     Of the options outstanding, 10,873,345, 9,567,270 and 5,278,870 were
exercisable as of September 30, 1996, 1995 and 1994, respectively.

     The Company has two stock grant plans under which grants of common shares
may be awarded to key officers, directors and managerial employees of the
Company and its subsidiaries. Shares granted under the plans generally vest in
varying cumulative periodic installments.

     A summary of stock grant transactions during the three years ended
September 30, 1996 is as follows:

<TABLE>
<CAPTION>
                                                          Number
                (Share amounts in thousands)            of Shares
                                                        ---------
                <S>                                        <C> 
                Grants Outstanding
                  September 30, 1993                        242
                    Granted                                 --
                    Vested                                 (110)
                    Forfeited                               --
                                                        ---------
                Grants Outstanding
                  September 30, 1994                        132
                    Granted                                  77
                    Vested                                 (129)
                    Forfeited                               --
                                                        ---------
                Grants Outstanding
                  September 30, 1995                         80
                    Granted                                 --
                    Vested                                  (31)
                    Forfeited                               (11)
                                                        ---------
                Grants Outstanding
                  September 30, 1996                         38
                                                        ---------
</TABLE>

     In October 1995, the FASB issued Statement of Financial Accounting
Standards No. 123 ("SFAS 123"), "Accounting for Stock-Based Compensation". SFAS
123, which is effective for fiscal years beginning after December 15, 1995,
establishes financial accounting and reporting standards for stock-based
employee compensation plans. The pronouncement defines a fair value based
method of accounting for an employee stock option or similar equity instrument,
and allows an entity to either adopt that method of accounting for all of their
employee stock compensation plans, or to continue to measure compensation cost
for those plans using the intrinsic value based method of accounting prescribed
by APB Opinion No. 25, "Accounting for Stock Issued to Employees". Entities
electing to continue using the accounting methods prescribed by APB Opinion No.
25 must make pro forma disclosures of net income and earnings per share as if
the fair value based method of accounting defined in SFAS 123 had been applied.
The Company will adopt the pro forma disclosure provisions of SFAS 123 at the
beginning of fiscal year 1997.

10 EMPLOYEE BENEFIT PLANS

     Certain of the Company's employees are covered by defined contribution
plans. The Company's contributions to the plans are based on employee
contributions and totaled $3.6 million, $2.9 million and $2.6 million for the
years ended September 30, 1996, 1995 and 1994, respectively.

     In November 1992, the FASB issued Statement of Financial Accounting
Standards No. 112, "Employers' Accounting for Post-employment Benefits" ("SFAS
112"). The adoption of SFAS 112 by the Company during 1995 did not have a
material effect upon the financial statements because the Company does not
provide such benefits to its employees.

11 COMMITMENTS AND CONTINGENCIES

OPERATING LEASES

     The Company and its subsidiaries occupy various facilities and lease
certain equipment under leases, that range in length from 1 to 30 years. The
minimum rental commitments under non-cancelable operating leases, with lease
terms in excess of one year subsequent to September 30, 1996, are as follows:

                                      36
<PAGE>   51

<TABLE>
<CAPTION>
               (In thousands)
               <S>                           <C>   
               1997                          $2,325
               1998                           2,145
               1999                           1,934
               2000                           1,368
               2001                             263
               Thereafter                     1,169
                                             ------
                                             $9,204
                                             ======
</TABLE>

     The above amounts do not include property taxes, insurance or normal
maintenance that the lessees are required to pay. Rental expense relating to
operating leases with terms greater than 30 days amounted to $2.5 million, $2.2
million and $2.1 million for the years ended September 30, 1996, 1995 and 1994,
respectively.

EMPLOYMENT CONTRACTS

     The Company has entered into employment contracts with certain of its
employees. The Company's minimum salary and bonus obligations under these
contracts are as follows:

<TABLE>
<CAPTION>
               (In thousands)
               <S>                           <C>   
               1997                          $2,801
               1998                           1,674
               1999                           1,480
               2000                             130
               2001                             125
                                             ------
                                             $6,210
                                             ======
</TABLE>

CAPITAL EXPENDITURES

     As of September 30, 1996 and 1995, the Company had capital expenditure
commitments totaling approximately $17.5 million and $15.5 million,
respectively.

CONTINGENCIES

     The Company is a defendant or otherwise involved in a number of lawsuits.
In the opinion of management, the Company's ultimate liability with respect to
these lawsuits is not expected to have a significant or material adverse effect
on the Company's consolidated financial position or results of operations.

     The Company insures its drilling rigs and equipment subject to various
deductibles, but not exceeding $.25 million per occurrence. The Company retains
the first $1.0 million per occurrence of its workers' compensation exposures in
the US Lower 48 and Alaska. These operations also are subject to a $.25 million
per occurrence deductible for auto liability. All international workers'
compensation and automobile liability is subject to a retrospectively rated
insurance policy. The Company self-insures the first $1.0 million per
occurrence and $2.0 million in the aggregate of general liability claims.

12 SUPPLEMENTAL BALANCE SHEET AND STATEMENT OF INCOME INFORMATION

     Accounts receivable is net of an allowance for doubtful accounts of $1.5
million and $1.4 million as of September 30, 1996 and 1995, respectively.
Pursuant to an employment agreement with an officer, the Company has provided a
non-interest bearing loan for approximately $2.9 million.

     Accrued liabilities includes accrued compensation totaling $23.1 million
and $19.6 million as of September 30, 1996 and 1995, respectively.

     Other income, net includes the following:

<TABLE>
<CAPTION>
                                                        September 30,
(In thousands)                                    1996       1995        1994
                                                --------   --------    --------
<S>                                             <C>        <C>         <C>     
Insurance gains                                 $  4,693   $  4,649    $    484
Marketable securities realized
  and unrealized gains                             4,871      2,406         908
Dividend income                                      486        297         550
Foreign currency gains (losses)                      510     (3,160)     (1,502)
Other                                                668        394         268
                                                --------   --------    --------
                                                $ 11,228   $  4,586    $    708
                                                ========   ========    ========
</TABLE>

13 UNAUDITED QUARTERLY FINANCIAL INFORMATION

<TABLE>
<CAPTION>
                                            Year Ended September 30, 1996
(In thousands,                        First      Second       Third      Fourth
except per share amounts)            Quarter     Quarter     Quarter     Quarter
                                    --------    --------    --------    --------
<S>                                 <C>         <C>         <C>         <C>     
Revenues                            $164,338    $163,319    $181,336    $210,750
Gross profit
  (excluding depreci-
  ation and general
  and administrative
  expenses)                           39,879      43,299      46,766      50,134
Operating income                      17,332      18,189      20,550      21,028
Net income                            15,262      16,822      18,669      19,747
Primary earnings
  per share                         $    .17    $    .18    $    .20    $    .21
                                    --------    --------    --------    --------
</TABLE>

<TABLE>
<CAPTION>
                                            Year Ended September 30, 1995
(In thousands,                        First      Second       Third      Fourth
except per share amounts)            Quarter     Quarter     Quarter     Quarter
                                    --------    --------    --------    --------
<S>                                 <C>         <C>         <C>         <C>     
Revenues                            $126,002    $143,335    $152,673    $150,778
Gross profit
  (excluding depreci-
  ation and general
  and administrative
  expenses)                           32,257      34,510      36,790      35,134
Operating income                      13,655      14,163      15,132      15,605
Net income                            11,073      12,284      13,045      14,702
Primary earnings
  per share                         $    .13    $    .14    $    .15    $    .16
                                    --------    --------    --------    --------
</TABLE>

                                      37
<PAGE>   52

14 DISTRIBUTION OF EARNINGS AND ASSETS

     The following table sets forth financial information with respect to the
Company and its subsidiaries, on a consolidated basis, by geographical area:

<TABLE>
<CAPTION>
Geographic Areas                                 Year Ended September 30,
(In thousands)                               1996          1995          1994
                                           --------      --------      --------
<S>                                        <C>           <C>           <C>     
Revenues(1)(2)
  North America                            $532,638      $416,475      $323,149
                                           --------      --------      --------
  International:
    Middle East, CIS,
      Africa and other                       64,682        58,932        76,156
    South and
      Central America                        69,232        49,453        32,991
    UK North Sea                             53,191        47,928        51,972
                                           --------      --------      --------
      Total International                   187,105       156,313       161,119
                                           --------      --------      --------
                                           $719,743      $572,788      $484,268
                                           --------      --------      --------

Operating income (loss)
  North America                            $ 61,611      $ 47,989      $ 35,246
                                           --------      --------      --------
  International:
    Middle East, CIS,
      Africa and other                        6,742         8,346       (26,091)
    South and
      Central America                        14,531         8,031         5,781
    UK North Sea                              6,575         3,916         5,647
                                           --------      --------      --------
      Total International                    27,848        20,293       (14,663)
                                           --------      --------      --------
  Corporate                                 (12,360)       (9,727)      (11,284)
                                           --------      --------      --------
                                           $ 77,099      $ 58,555      $  9,299
                                           --------      --------      --------

Assets
  North America                            $496,664      $354,733      $251,848
                                           --------      --------      --------
  International:
    Middle East, CIS,
      Africa and other                      139,454       117,887       108,170
    South and
      Central America                        87,898        84,845        52,843
    UK North Sea                             15,878        15,221        21,398
                                           --------      --------      --------
      Total International                   243,230       217,953       182,411
                                           --------      --------      --------
  Corporate                                 131,380        20,586        56,014
                                           --------      --------      --------
                                           $871,274      $593,272      $490,273
                                           --------      --------      --------
</TABLE>

(1)  No material revenues were derived from transactions between geographic
     areas of operation.

(2)  No customers provided 10% or more of consolidated revenues in the years
     presented. In the opinion of management, the loss of a single customer
     would not have a material adverse effect on the Company's business.

15 SUBSEQUENT EVENTS

     During November 1996, the Company completed the sale of its wholly owned
subsidiary Nabors Drilling & Energy Services UK Ltd. ("NDES") to KCA, a wholly
owned subsidiary of Abbot Group plc, a diversified holding company listed on
the London stock exchange. The Company received approximately $36.0 million
plus the value of working capital in cash, as well as 10.8 million four year
warrants to acquire stock in the Abbot Group plc at 83 pence per share. The
transaction will result in a gain which will be reflected in the Company's
financial statements in the first quarter of 1997.

     During December 1996, the Company purchased 47 land drilling rigs from
Noble Drilling Corporation for $60 million in cash. The fleet of rigs consists
of 19 operating rigs and 28 stacked rigs in various stages of completeness; 38
of the rigs are located in the United States and nine are located in Canada.
The acquisition will be accounted for under the purchase method of accounting.

     During December 1996, the Company executed a definitive agreement to merge
with Adcor-Nicklos Drilling Company ("Adcor") in a stock-for-stock exchange
that will be accounted for as a pooling-of-interests. All of the stock of Adcor
will be exchanged for approximately 3.4 million shares of Nabors common stock.
The transaction, which has already received government approval, is expected to
close in January 1997. The Adcor fleet consists of 30 active and six stacked
rigs located in the United States. The assets also include significant amounts
of drill pipe, spare drilling equipment, yards, vehicles and other support
equipment.

                                      38
<PAGE>   53

CORPORATE ADDRESS
Nabors Industries, Inc.
515 West Greens Road
Suite 1200
Houston, Texas 77067
Telephone: (281) 874-0035
Fax: (281) 872-5205

FORM 10-K
Copies may be obtained at no charge by writing to the 
Secretary at the corporate office of the Company.

TRANSFER AGENT
First Chicago Trust Company of New York
P.O. Box 2500
Jersey City, New Jersey 07303

INVESTOR CONTACT
Dennis A. Smith
Director of Corporate Development

INDEPENDENT ACCOUNTANTS
Coopers & Lybrand L.L.P.
Houston, Texas

PRICE OF COMMON STOCK

     As of September 30, 1996, there were 86,981,388 shares of Common Stock
outstanding held by 1,628 holders of record.

     The Common Stock is listed on the American Stock Exchange under the symbol
"NBR." The following table sets forth the reported high and low sales prices of
the Common Stock on the Composite Tape for the quarters indicated.

<TABLE>
<CAPTION>
                                  Stock Price
Fiscal Year                    High          Low
- -----------                    ----          ---
<S>                           <C>          <C>      
1995
  First Quarter                7 7/8        6 1/8
  Second Quarter               7 1/2        6
  Third Quarter                9 11/16      7 3/8
  Fourth Quarter              10            7 15/16
1996
  First Quarter               11 3/8        8 1/16
  Second Quarter              15 1/4       10 1/4
  Third Quarter               16 5/8       13 7/8
  Fourth Quarter              17 3/8       13
</TABLE>

OPERATING SUBSIDIARIES
Nabors Alaska Drilling, Inc.
Anchorage, Alaska
James Denney, President

Nabors Drilling International Limited
Houston, Texas
Siegfried Meissner, President

Nabors Drilling USA, Inc.
Houston, Texas
Richard Stratton, President
Larry P. Heidt, Executive Vice President

Nabors Drilling Limited
Nisku, Alberta
Duane A. Mather, President

Peak Oilfield Services Company
Anchorage Alaska
Michael R. O' Conner, President

Loffland Brothers de Venezuela, C.A.
Caracas, Venezuela
Siegfried Meissner, President

Sundowner Offshore Services, Inc.
Houston, Texas
Jerry C. Shanklin, President and Chairman

CANRIG Drilling Technology, Ltd.
Magnolio, Texas
Allan Richardson, President

EPOCH Well Logging, Inc.
Bakersfield, California
Christopher P. Papouras, President

<PAGE>   54


                                    [PHOTO]

<PAGE>   1
                                                                      EXHIBIT 21


                            NABORS INDUSTRIES, INC.
               List of Subsidiaries and Certain Other Affiliates

                                                  
<TABLE>                                           
Subsidiary or Affiliate                           Jurisdiction of Incorporation
- -----------------------                           -----------------------------
<S>                                               <C>
Activo Rental, Inc.                                        Delaware
Andean Rental, Inc.                                        Delaware
AIC LLC. (50%)                                             Alaska
ARRH, Inc.                                                 Delaware
Beaufort Marine J.V. (50%)                                 Alaska
Canrig Drilling Technology Ltd.                            Alberta
Canrig Drilling Technology Ltd.                            Delaware
Crest Service Company                                      Delaware
Delta Acquisition Corp.                                    Texas
Delta Drilling Company                                     Texas
Exeter Drilling Company                                    Nevada
Exeter International, Inc.                                 Delaware
J.W. Gibson Well Service Company                           Delaware
Hemisphere Oil Services, Inc.                              Delaware
Intrafield Oil Services Limited                            Barbados
Kodiak Oilfield Haulers, Inc.                              Alaska
Loffland Brothers Company of Canada                        Delaware
Loffland Brothers de Venezuela, C.A.                       Venezuela
Loffland Brothers North Sea, Inc.                          Nevada
Maple Leaf Financial Services, Inc.                        Delaware
Nabors Acquisition Corp. III                               Delaware
Nabors Alaska Drilling, Inc.                               Alaska
Nabors Alaska Services Corp.                               Delaware
Nabors Canada Limited                                      Delaware
Nabors Capital, Ltd.                                       Delaware
Nabors Corporate Services, Inc.                            Delaware
Nabors Drilling & Energy Services UK Limited               United Kingdom
Nabors Drilling International Limited                      Delaware
Nabors Drilling International Limited                      Bermuda
Nabors Drilling Limited                                    Canada
Nabors Drilling USA, Inc.                                  Delaware
Nabors Equipment, Inc.                                     Delaware
Nabors Eurasia, Inc.                                       Delaware
Nabors Europe Limited                                      United Kingdom
Nabors Gull Corp.                                          Delaware
Nabors Incorporated Ecuador                                Ecuador
Nabors International, Inc.                                 Delaware
Nabors Kazakhstan Company                                  Kazakhstan
Nabors Offshore Drilling, Inc.                             Delaware
Nabors Oilfield Equipment, Inc.                            Delaware
Nabors Russia, Inc.                                        Delaware
Nabors Shipping Company                                    Delaware
Nabors Yemen, Ltd.                                         Delaware
</TABLE>
<PAGE>   2

Page 2 of 2

<TABLE>
Subsidiary or Affiliate                                 Jurisdiction of Incorporation
- -----------------------                                 -----------------------------
<S>                                                             <C>            
Nabors Yemen Transportation Services, Ltd.                      Delaware       
Nadrico Saudi Limited (45%)                                     Saudi Arabia   
Peak Oilfield Services Company (50%)                            Alaska         
Peak-Ploss Industries (49 1/2%)                                 Texas          
Peak USA Energy Services, Ltd.  (Ltd. Partnership)              Texas          
Petroleum Resources I, Inc.                                     Delaware       
Red Deer Financial Services LLC                                 Delaware       
SOL Insurance Limited                                           Bermuda        
Solefin, Inc.                                                   Nevada         
Sovereign Oilfield, Inc.                                        Delaware       
Sovereign Supply Company                                        Delaware       
Sundowner Offshore International (Bermuda) Limited              Bermuda        
Sundowner Offshore Australia (50%)                              Australia      
Sundowner Offshore Services, Inc.                               Nevada         
Sundowner Trinidad, Inc.                                        Delaware       
Sunset P&A Services                                             Nevada         
Thistle Filtration Services Ltd.                                United Kingdom 
Thistle Well Services Limited                                   United Kingdom 
Thistle Wireline Services Ltd.                                  United Kingdom 
West Range Leasing, Inc.                                        Delaware       
</TABLE>                                                                       

<PAGE>   1
                                                                  EXHIBIT 23

                       CONSENT OF INDEPENDENT ACCOUNTANTS

         We consent to the incorporated by reference in the Registration
Statements of Nabors Industries, Inc. on Form S-8 (Registration Numbers
333-11313 and 33-87322) and on Form S-3 (Registration Number 333-2427) of our
report dated November 25, 1996, except as to certain information presented in 
Notes 9 and 15, for which the date is December 20, 1996, on our audits of the
consolidated financial statements of Nabors Industries, Inc. and Subsidiaries 
as of September 30, 1996 and 1995, and for each of the three years in the 
period ended September 30, 1996, which reports are included in this Annual 
Report on form 10-K.

                                             COOPERS & LYBRAND L.L.P.

Houston, Texas
December 30, 1996

<TABLE> <S> <C>

<ARTICLE> 5
       
<S>                         <C>  
<PERIOD-TYPE>               12-MOS  
<FISCAL-YEAR-END>                SEP-30-1996
<PERIOD-START>                   OCT-01-1995
<PERIOD-END>                     SEP-30-1996
<CASH>                                95,867
<SECURITIES>                           8,160
<RECEIVABLES>                        172,720
<ALLOWANCES>                               0
<INVENTORY>                           18,528
<CURRENT-ASSETS>                     328,534
<PP&E>                               762,074
<DEPRECIATION>                       250,871
<TOTAL-ASSETS>                       871,274
<CURRENT-LIABILITIES>                156,443
<BONDS>                              229,504
                      0
                                0
<COMMON>                               8,747
<OTHER-SE>                           449,075
<TOTAL-LIABILITY-AND-EQUITY>         871,274
<SALES>                              719,743
<TOTAL-REVENUES>                     719,743
<CGS>                                539,665
<TOTAL-COSTS>                        539,665
<OTHER-EXPENSES>                     102,979
<LOSS-PROVISION>                           0
<INTEREST-EXPENSE>                    11,884
<INCOME-PRETAX>                       81,600
<INCOME-TAX>                          11,100
<INCOME-CONTINUING>                   70,500
<DISCONTINUED>                             0
<EXTRAORDINARY>                            0
<CHANGES>                                  0
<NET-INCOME>                          70,500
<EPS-PRIMARY>                            .76
<EPS-DILUTED>                            .75
        

</TABLE>


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