ENSCO INTERNATIONAL INC
10-K405, 1999-03-01
DRILLING OIL & GAS WELLS
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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549
                            ----------------------


                                 1998 FORM 10-K
(Mark One)
   [X]      ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934
                   For the fiscal year ended December 31, 1998
                                       OR
   [ ]     TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934
            For the transition period from . . . . . . to . . . . . 

                          Commission File Number 1-8097

                        ENSCO International Incorporated
             (Exact name of registrant as specified in its charter)

                    DELAWARE                               76-0232579
         (State or other jurisdiction of                (I.R.S. Employer
          incorporation or organization)               Identification No.)

              2700 Fountain Place
               1445 Ross Avenue
                 Dallas, Texas                             75202-2792
      (Address of principal executive offices)             (Zip code)

    Registrant's telephone number, including area code:   (214) 922-1500


           Securities registered pursuant to Section 12(b) of the Act:

      Title of each class       Name of each exchange on which registered
      -------------------       -----------------------------------------
  Common Stock, par value $.10         New York Stock Exchange
 Preferred Share Purchase Right        New York Stock Exchange

        Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark whether the 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 (or for such  shorter  period that the  registrant  was
required  to file  such  reports),  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]

As of February 19, 1999,  137,047,152  shares of the  registrant's  common stock
were outstanding. The aggregate market value of the common stock (based upon the
closing  price on the New York Stock  Exchange on February 19, 1999 of $9.00) of
ENSCO International Incorporated held by nonaffiliates of the registrant at that
date was approximately $976,957,741.


                       DOCUMENTS INCORPORATED BY REFERENCE

Certain sections of the Company's definitive proxy statement, which involves the
election of directors  and is to be filed under the  Securities  Exchange Act of
1934 within 120 days of the end of the  Company's  fiscal  year on December  31,
1998,  are  incorporated  by  reference  into Part III hereof.  Except for those
portions specifically  incorporated by reference herein, such document shall not
be deemed to be filed with the Commission as part of this Form 10-K.



<PAGE>



                                TABLE OF CONTENTS

                                                                          PAGE
- --------------------------------------------------------------------------------

PART     ITEM 1.   BUSINESS .............................................    1
I                  Overview and Operating Strategy ......................    1
                   Contract Drilling Operations .........................    1
                   Marine Transportation Operations .....................    2
                   Backlog Information ..................................    2
                   Segment Information ..................................    3
                   Major Customers ......................................    4
                   Industry Conditions and Competition ..................    4
                   Governmental Regulation ..............................    4
                   Environmental Matters ................................    5
                   Operational Risks and Insurance ......................    5
                   International Operations .............................    5
                   Executive Officers of the Registrant .................    6
                   Employees ............................................    7
         ITEM 2.   PROPERTIES ...........................................    8
                   Contract Drilling ....................................    8
                   Marine Transportation ................................   10
                   Other Property .......................................   10
         ITEM 3.   LEGAL PROCEEDINGS ....................................   11
         ITEM 4.   SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS ..   11

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

PART     ITEM 5.   MARKET FOR REGISTRANT'S COMMON EQUITY AND
II                 RELATED STOCKHOLDER MATTERS ..........................   12
         ITEM 6.   SELECTED CONSOLIDATED FINANCIAL DATA .................   13
         ITEM 7.   MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                   CONDITION AND RESULTS OF OPERATIONS ..................   14
                   Business Environment .................................   14
                   Results of Operations ................................   14
                   Liquidity and Capital Resources ......................   19
                   Market Risk ..........................................   21
                   Year 2000 Update .....................................   21
                   Outlook and Forward-Looking Statements ...............   22
                   New Accounting Pronouncements ........................   23
         ITEM 7A.  QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET
                   RISK .................................................   23
         ITEM 8.   FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA ..........   24
         ITEM 9.   CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON
                   ACCOUNTING AND FINANCIAL DISCLOSURE ..................   44

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

PART     ITEMS 10-13. DIRECTORS AND EXECUTIVE OFFICERS, EXECUTIVE
III                   COMPENSATION, SECURITY OWNERSHIP OF CERTAIN
                      BENEFICIAL OWNERS AND MANAGEMENT, AND CERTAIN
                      RELATIONSHIPS AND RELATED TRANSACTIONS ............   45

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

PART     ITEM 14.   EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND
IV                  REPORTS ON FORM 8-K .................................   46

         SIGNATURES .....................................................   50



                                      - i -


<PAGE>

                                     PART I

Item 1. Business

     Overview and Operating Strategy

       ENSCO  International  Incorporated  ("ENSCO"  or  the  "Company")  is  an
international  offshore  contract  drilling  company that also  provides  marine
transportation  services  in the Gulf of Mexico.  The  Company's  complement  of
offshore  drilling  rigs  includes  36 jackup  rigs,  six  barge  rigs and eight
platform rigs. The Company's marine transportation fleet consists of 36 vessels.
The  Company's  operations  are  integral to the  exploration,  development  and
production of oil and natural gas.

       Since 1987,  the Company has pursued a strategy of building  its fleet of
offshore   drilling  rigs.  This  strategy  was  exemplified  by  the  Company's
acquisition  of  Penrod  Holding  Corporation  ("Penrod")  in August  1993,  the
construction  of eight new barge  rigs for the  Company's  Venezuelan  rig fleet
during 1993 and 1994 and the addition of three harsh environment  jackup rigs to
its North Sea  fleet,  two in 1994 and one in 1995.  In June 1996,  the  Company
acquired DUAL DRILLING COMPANY ("Dual") in a transaction  which added 20 rigs to
the Company's fleet. The Company  subsequently  purchased two additional  jackup
rigs,  one each in November  1996 and December  1997.  During 1998,  the Company
began  construction of three barge rigs, one harsh environment jackup rig, and a
semisubmersible rig.

       With the Company's  increasing emphasis on offshore markets,  the Company
has disposed of  businesses  that are not offshore  oriented or that  management
believed  would not meet the  Company's  standards  for  financial  performance.
Accordingly,  the Company sold its supply business in 1993, substantially all of
its land rigs in 1994 and its technical  services  business in 1995. Four of the
Company's barge rigs  constructed in 1993 were sold in 1998 pursuant to purchase
options provided for in the original charter agreements.

       The  Company  was  formed  as  a  Texas   corporation  in  1975  and  was
reincorporated in Delaware in 1987. The Company's principal office is located at
2700  Fountain  Place,  1445 Ross  Avenue,  Dallas,  Texas,  75202-2792  and its
telephone number is (214) 922-1500. The Company's website is www.enscous.com.

     Contract Drilling Operations

       The Company's contract drilling operations,  other than in Venezuela, are
conducted by a number of wholly-owned  subsidiaries  (the  "Subsidiaries").  The
Company's  Venezuela contract drilling  operations are conducted through its 85%
ownership  interest  in ENSCO  Drilling  (Caribbean),  Inc.  ("Caribbean").  The
Subsidiaries  engage  in the  drilling  of oil and gas  wells  in  domestic  and
international  markets  under  contracts  with major  international  oil and gas
companies,  government  owned oil and gas companies and  independent oil and gas
companies.  The Company  currently owns 36 jackup rigs, six barge rigs and seven
platform  rigs.  Of the 36 jackup  rigs,  22 are  located in the Gulf of Mexico,
seven are  located in the North Sea and seven are  located  in the Asia  Pacific
region.  The six barge rigs are all located in Venezuela and the seven  platform
rigs are all located in the Gulf of Mexico. An additional platform rig, which is
not owned but is operated under a management contract,  is located off the coast
of China.  The Company is  currently  constructing  three barge rigs,  one harsh
environment  jackup  rig  and  a  semisubmersible   drilling  rig.  The  Company
anticipates  that  construction  of the three new barge  rigs will be  completed
during the first and second  quarters  of 1999.  These rigs will be  operated in
Venezuela  under five year contracts  with an affiliate of Chevron  Corporation.
The Company  anticipates that the harsh environment jackup rig will be completed
in the first  quarter of 2000 and the  semisubmersible  rig will be completed in
the  second  half of  2000.  The  semisubmersible  rig is  under  contract  with
Burlington  Resources and will be operated  initially in the Gulf of Mexico. The
Company does not currently have a contract for the harsh environment  jackup rig
under construction, which is capable of operating worldwide.

       The  Company's  contract  drilling  services  and  equipment  are used in
connection with the process of drilling and completing oil and gas wells. Demand
for the  Company's  drilling  services is based upon many factors over which the
Company has no control, including the market price of oil and gas, the stability
of such prices, the production levels and other activities of OPEC and other oil
and gas producers, the regional supply and demand for natural gas, the worldwide
expenditures for oil and gas drilling,  the level of worldwide economic activity
and the long-term effect of worldwide energy conservation measures.

                                       1
<PAGE>

       The  drilling  services  provided  by  the  Company  are  conducted  on a
"daywork" contract basis. Under daywork contracts,  the Company receives a fixed
amount per day for drilling the well,  and the customer bears a major portion of
the ancillary costs of  constructing  the well. The customer may pay the cost of
moving  the  equipment  to the job  site  and  assembling  and  dismantling  the
equipment.  In some cases, the Company provides  drilling  services on a daywork
contract basis along with "well  management"  services which provide  additional
incentive  compensation to the Company for completion of drilling activity ahead
of budgeted targets set by the customer.  The Company does not provide "turnkey"
or other risk based drilling services.

     Marine Transportation Operations

       The  Company  conducts  its marine  transportation  operations  through a
wholly  owned  subsidiary,  ENSCO  Marine  Company  ("ENSCO  Marine"),  based in
Broussard,  Louisiana.  The  Company  has a  marine  transportation  fleet of 36
vessels  consisting  of five anchor  handling tug supply  ("AHTS")  vessels,  23
supply  vessels  and eight  mini-supply  vessels.  All of the  Company's  marine
transportation vessels are currently located in the Gulf of Mexico.

       The Company's five AHTS vessels support semisubmersible drilling rigs and
large offshore construction projects or provide towing services including moving
some of the  Company's  jackup rigs between  drilling  locations.  The 23 supply
vessels and eight  mini-supply  vessels support general  drilling and production
activity by ferrying supplies from land and between offshore rigs.

     Backlog Information

       During the past several  years,  contracts  for the  Company's  rigs have
typically  been  short-term,  particularly  in the U.S. Gulf of Mexico where the
Company has its largest  concentration  of rigs.  However,  due to renewals  and
extension clauses included in the contracts,  approximately 36% of the Company's
rigs have worked for the same  customer for greater than six months and over 30%
of the  Company's  rigs have  worked for the same  customer  for longer than one
year.

       The Company's marine transportation  vessels are typically chartered on a
well-to-well  basis,  or on term  contracts  which  may be  terminated  on short
notice.

       The current and historic  backlog of unfilled  business for the Company's
contract  drilling  and  marine  transportation  operations  is shown  below (in
millions):

                                         As of                As of
                                    February 1, 1999     February 1, 1998
                                    ----------------     ----------------

         Contract Drilling               $541.0               $601.3

         Marine Transportation              7.2                 39.2
                                         ------               ------

         Total                           $548.2               $640.5
                                         ======               ======

       Approximately  $384.5  million  of  the  backlog  for  contract  drilling
services  will be realized  after  December 31,  1999.  Included in the contract
drilling  backlog  as of  February  1,  1999  is  approximately  $190.7  million
associated with the Company's semisubmersible rig that is under construction and
was not included in the contract drilling backlog as of February 1, 1998. All of
the marine transportation  services backlog at February 1, 1999 will be realized
before December 31, 1999.




                                       2
<PAGE>

     Segment Information

       The  following  table  provides  information  regarding the Company's two
segments, contract drilling and marine transportation, for each of the last five
years in the period ended December 31, 1998:

                                           1998    1997  1996(1)   1995    1994
                                         ------- ------- ------- ------- -------
Offshore Drilling Rig Utilization and
Day Rates
  Utilization:
      Jackup rigs
           North America ...............     93%     96%     93%     90%     91%
           Europe ......................     97%    100%     88%     73%     71%
           Asia Pacific ................     61%     79%     86%      --     29%
           South America ...............      --      --      --      --     62%
                                         ------- ------- ------- ------- -------
              Total jackup rigs ........     88%     93%     92%     87%     83%
      Barge rigs - South America .......    100%    100%     91%     86%    100%
      Platform rigs ....................     89%     63%     78%      --     --
                                         ------- ------- ------- ------- -------
           Total .......................     90%     90%     90%     86%     87%
                                         ======= ======= ======= ======= =======

  Average day rates:
      Jackup rigs
           North America ............... $43,473 $46,530 $27,793 $20,559 $21,531
           Europe ......................  95,307  79,548  47,714  42,631  24,528
           Asia Pacific ................  49,328  39,363  26,751      --  27,739
           South America ...............      --      --      --      --  24,629
                                         ------- ------- ------- ------- -------
              Total jackup rigs ........  54,242  51,438  31,505  24,813  22,269
      Barge rigs - South America .......  22,069  22,628  22,608  19,631  16,413
      Platform rigs ....................  25,534  19,148  16,913      --      --
                                         ------- ------- ------- ------- -------
           Total ....................... $45,112 $42,838 $28,238 $23,196 $20,539
                                         ======= ======= ======= ======= =======

Marine Fleet Utilization and Day Rates
  Utilization:
      AHTS(2)...........................     67%     83%     79%     84%     81%
      Supply ...........................     87%     91%     92%     84%     86%
      Mini-supply ......................     73%     95%     87%     65%     93%
                                         ------- ------- ------- ------- -------
           Total .......................     81%     91%     89%     79%     86%
                                         ======= ======= ======= ======= =======

  Average day rates:
      AHTS(2)........................... $15,870 $13,380 $ 9,321 $ 7,732 $ 7,686
      Supply ...........................   6,917   7,789   4,729   3,136   3,173
      Mini-supply ......................   4,041   3,997   2,972   1,985   1,663
                                         ------- ------- ------- ------- -------
           Total ....................... $ 7,308 $ 7,687 $ 5,016 $ 3,753 $ 3,826
                                         ======= ======= ======= ======= =======

- ----------

(1)  Offshore  Drilling Rig  information  includes the results of Dual rigs from
     the June 12, 1996  acquisition  date. The Company acquired its Asia Pacific
     and platform rigs in the June 1996 Dual acquisition.
(2)  Anchor handling tug supply vessels.

       Financial  information  regarding  the Company's  operating  segments and
foreign  and  domestic  operations  is  presented  in Note 9 of the Notes to the
Consolidated  Financial Statements included in "Item 8. Financial Statements and
Supplementary  Data." Additional financial  information  regarding the Company's
operating segments is presented in "Item 7. Management's Discussion and Analysis
of Financial Condition and Results of Operations."




                                       3
<PAGE>


     Major Customers

       The Company provides its services to a broad customer base which includes
major  international  oil  and  gas  companies,  government  owned  oil  and gas
companies and independent oil and gas companies. During 1998, aggregate revenues
provided to the Company's contract drilling  operations by Nederlandse  Aardolie
Maatschappij B.V. ("NAM"), a Royal Dutch/Shell  affiliate,  were $142.2 million,
or 17% of total revenues.

     Industry Conditions and Competition

       The market for offshore  drilling and marine  transportation  services is
largely  determined by the level of capital  spending of the oil companies which
in turn is influenced by the level of oil and gas prices.  From the mid-1980s to
the early 1990s, demand for offshore drilling and marine equipment was generally
depressed  following  the  collapse  of oil  prices  in 1986  and the  resulting
contraction of oil company spending,  while the over supply of offshore drilling
and marine equipment gradually  decreased,  primarily due to attrition.  Between
1994 and the first part of 1998, oil company spending  steadily improved and, as
a result,  day rates and utilization for offshore  drilling and marine equipment
increased.  Technological  advancements,  such  as  three  dimensional  seismic,
extended reach drilling, and multilateral drilling techniques, have improved the
economics of finding and developing oil and gas reserves.  During 1998,  concern
over excess oil  supplies,  due in part to the  economic  slowdown in  Southeast
Asia,  caused  oil  prices to  decrease  to  levels  not  experienced  since the
mid-1980's.  As a result,  oil companies have decreased  their  exploration  and
production  budgets,  which has led to a  decrease  in demand for  drilling  and
marine transportation  services.  The supply of drilling rigs exceeds the demand
on a worldwide basis.  This has resulted in a dramatic drop in the day rates and
utilization of the Company's rigs and marine transportation vessels.

       As a result of current  industry  conditions,  the Company and several of
its competitors have experienced  early  terminations of long-term  contracts by
customers.  In  January  1999,  contracts  on the  Company's  six barge  rigs in
Venezuela  were  terminated  early by Petroleos  de  Venezuela,  the  Venezuelan
national oil company. These contracts were originally scheduled to expire in the
second and third  quarters  of 1999.  As a result of  termination  clauses and a
negotiated settlement, the Company received lump sum payments amounting to $18.7
million in January 1999. In addition,  the Company has received notice from NAM,
the Company's  largest  customer in 1998, that it intends to terminate early the
contracts on four jackup rigs that were originally  under contract through 1999.
These contracts were cancelable with a 90 day notification  period.  At present,
the Company's only remaining  long-term  contracts are associated with the three
barge rigs and one semisubmersible rig currently under construction.

       The contract drilling  business is highly  competitive and ENSCO competes
with other  drilling  contractors  on the basis of price,  quality  of  service,
equipment  suitability  and  availability,  reputation and technical  expertise.
Competition is usually on a regional basis, but the Company's  drilling rigs are
mobile  and may be moved  from one  region to  another  in  response  to demand.
Drilling  operations  are  generally  conducted  throughout  the year  with some
seasonal declines in winter months.

       As the Company's  marine  transportation  services are used  primarily in
connection with the process of servicing offshore oil and gas operations, demand
for these  services is largely  dependent on the factors  affecting the level of
activity in the  offshore  oil and gas  industry.  ENSCO  Marine  competes  with
numerous  vessel  operators  on the basis of price,  quality of service,  vessel
suitability and availability and reputation.  Marine  transportation  operations
are conducted throughout the year, but some reductions in vessel utilization and
charter rates may be experienced  during winter months due to seasonal  declines
in offshore activities.

       Additional  information  regarding  industry conditions  is  presented in
"Item 7. Management's Discussion and Analysis of Financial Condition and Results
of Operations."

     Governmental Regulation

       The Company's  businesses are affected by political  developments  and by
federal,  state,  foreign and local laws and regulations that relate directly to
the oil and gas  industry.  The industry is also  affected by changing tax laws,
price  controls and other laws  affecting the energy  business.  The adoption of
laws and regulations curtailing exploration and development drilling for oil and
gas for economic,  environmental or other policy reasons  adversely  affects the
Company's  operations by limiting available drilling and other  opportunities in
the energy service industry, as well as increasing the costs of operations.



                                       4
<PAGE>

       The Company and its rigs and  operations  are subject to federal,  state,
local  and  foreign  laws  and  regulations  relating  to  engineering,  design,
structural, safety and operational and inspection standards.

       Most of the Company's marine  transportation  operations are conducted in
U.S.  waters  and  are  subject  to the  coastwise  laws of the  United  States,
principally,  the Jones Act.  Such laws reserve  marine  transportation  between
points in the United States to vessels built and documented  under U.S. laws and
owned and manned by U.S. citizens.  From time to time,  interests opposed to the
Jones Act have  expressed an intent to seek  changes to the Jones Act.  Although
the Company  believes it is  unlikely  that the Jones Act will be  substantively
modified or repealed,  there can be no  assurance  that the Jones Act may not be
modified  or  repealed.  Such  changes  in the Jones Act could  have a  material
adverse effect on the Company's operations and financial condition.

     Environmental Matters

       The Company's operations are subject to federal, state and local laws and
regulations  controlling  the  discharge of materials  into the  environment  or
otherwise  relating to the protection of the  environment.  Laws and regulations
specifically  applicable  to the  Company's  business  activities  could  impose
significant  liability on the Company for damages,  clean-up costs and penalties
in the event of the occurrence of oil spills or similar discharges of pollutants
into the  environment in the course of the Company's  operations,  although,  to
date,  such laws and regulations  have not had a material  adverse effect on the
Company's  results of  operations,  nor has the Company  experienced an accident
that has exposed it to material  liability for discharges of pollutants into the
environment.  In addition,  events in recent years have heightened environmental
concerns  about  the  oil  and  gas  industry  generally.  From  time  to  time,
legislative  proposals  have been  introduced  which would  materially  limit or
prohibit  offshore  drilling in certain areas. To date, no proposals which would
materially limit or prohibit offshore drilling in the Company's  principal areas
of  operation  have  been  enacted  into  law.  If laws  are  enacted  or  other
governmental  action is taken that restrict or prohibit offshore drilling in the
Company's  areas of operation or impose  environmental  protection  requirements
that  materially  increase  the cost of  offshore  exploration,  development  or
production of oil and gas, the Company could be materially adversely affected.

       The United  States  Oil  Pollution  Act of 1990  ("OPA  90") and  similar
legislation  in Texas,  Louisiana  and other  coastal  states  address oil spill
prevention and control and  significantly  expand liability  exposure across all
segments  of the oil and gas  industry.  OPA 90,  and  similar  legislation  and
related  regulations  impose a variety of obligations on the Company  related to
the prevention of oil spills and liability for resulting damages. OPA 90 imposes
strict and,  with  limited  exceptions,  joint and several  liability  upon each
responsible party for oil removal costs and a variety of damages. OPA 90 imposes
ongoing financial responsibility  requirements.  A failure to comply with OPA 90
may subject a responsible party to civil or criminal enforcement action.

     Operational Risks and Insurance

       Contract drilling and oil and gas operations are subject to various risks
including blowouts, craterings, fires and explosions, each of which could result
in damage to or  destruction  of drilling  rigs and oil and gas wells,  personal
injury and property  damage,  suspension of operations or  environmental  damage
through oil spillage or extensive,  uncontrolled  fires.  The  Company's  marine
transportation  operations are subject to various risks,  which include property
and environmental  damage and personal injury. The Company generally insures its
drilling  rigs and marine  transportation  vessels for amounts not less than the
estimated  fair market  value  thereof.  The Company  also  maintains  liability
insurance coverage in amounts and scope which management believes are comparable
to the levels of coverage  carried by other energy service  companies.  To date,
the Company has not  experienced  difficulty  in obtaining  insurance  coverage.
While the Company believes its insurance  coverages are customary for the energy
service  industry,  the  occurrence  of a  significant  event not fully  insured
against  could  have  a  material  adverse  effect  on the  Company's  financial
position.  Also,  there can be no assurance that any particular  insurance claim
will be paid or that the  Company  will be able to  procure  adequate  insurance
coverage at commercially reasonable rates in the future.

     International Operations

       A significant  portion of the Company's contract drilling  operations are
conducted in foreign  countries.  Revenues  from  international  operations as a
percentage of the Company's total revenues were 45% in 1998 and 41% in 1997. The
Company's international operations are subject to political, economic, and other
uncertainties,   such  as  the  risks  of   expropriation   of  its   equipment,
expropriation  of a  customer's  property or  drilling  rights,  repudiation  of
contracts,  adverse tax policies,  general hazards associated with international
sovereignty over certain areas in which the Company operates and fluctuations in
international economies.

                                       5
<PAGE>


       The Company's international  operations also face the risk of fluctuating
currency values and exchange  controls.  Occasionally the countries in which the
Company operates have enacted exchange controls.  Historically,  the Company has
been able to limit  these  risks by  obtaining  compensation  in  United  States
dollars  or  freely  convertible  international  currency  and,  to  the  extent
possible,  by limiting acceptance of foreign currency to amounts which match its
expenditure requirements in such currencies.

       The Company currently has contract drilling operations in Asian countries
that have experienced substantial devaluations of their currency compared to the
U.S. dollar.  However,  as the Company's drilling contracts  generally stipulate
payment in U.S. dollars,  the Company has experienced no significant  losses due
to the devaluation of such currencies.

     Executive Officers of the Registrant

       The  following  table  sets  forth  certain  information   regarding  the
executive officers of the Company:

        Name            Age             Position with the Company
        ----            ---             -------------------------

Carl F. Thorne           58   Chairman of the Board, President, Chief Executive
                              Officer and Director

Richard A. Wilson        61   Senior Vice President, Chief Operating Officer and
                              Director

Marshall Ballard         56   Vice President - Business Development

William S. Chadwick, Jr. 51   Vice President - Administration and Secretary

Eugene R. Facey          51   Vice President - Operations

C. Christopher Gaut      42   Vice President - Finance and Chief Financial
                              Officer

H. E. Malone             55   Vice President - Controller and Chief Accounting
                              Officer

Philip J. Saile          47   Vice President - Operations

Frank Williford          59   Vice President - Engineering

Richard A. LeBlanc       48   Treasurer


       Set  forth  below  is  certain  additional   information  concerning  the
executive  officers of the Company,  including  the business  experience of each
executive officer for at least the last five years.

       Carl F. Thorne has been a director of the Company since December 1986. He
was elected President and Chief Executive Officer of the Company in May 1987 and
was elected  Chairman of the Board of Directors  in November  1987.  Mr.  Thorne
holds a Bachelor of Science Degree in Petroleum  Engineering from The University
of Texas and a Juris Doctorate Degree from Baylor University College of Law.

       Richard A. Wilson has been a director of the Company since June 1990. Mr.
Wilson  joined  the  Company  in July 1988 and was  elected  President  of ENSCO
Drilling  Company in August 1988. Mr. Wilson was elected Senior Vice President -
Operations of the Company in October 1989 and to his present  position of Senior
Vice  President  and Chief  Operating  Officer in June 1991.  Mr. Wilson holds a
Bachelor of Science  Degree in  Petroleum  Engineering  from the  University  of
Wyoming.

       Marshall Ballard joined the Company in connection with the acquisition of
Penrod  Holding   Corporation   and  was  elected  Vice  President  of  Business
Development in August 1993. From September 1977 through August 1993, Mr. Ballard
served in various capacities as an employee of Penrod Holding Corporation,  most
recently as  President.  Mr.  Ballard holds a Bachelor of Arts Degree in History
from the University of North Carolina and a Law Degree from Tulane University.

       William S. Chadwick, Jr. joined the Company as Director of Administration
in June 1987,  has been a Vice  President of the Company since July 1988 and was
elected  Secretary of the Company in May 1993. Mr.  Chadwick holds a Bachelor of
Science Degree in Industrial Management from the University of Pennsylvania.

                                       6
<PAGE>

       Eugene R. Facey  joined the Company in August 1996 and was  elected  Vice
President  Operations in February 1999, to be effective April 1, 1999.  Prior to
his  appointment,  Mr. Facey  served as Unit Manager for the Asia Pacific  Unit.
From 1990 to 1996,  Mr.  Facey  served in various  capacities  as an employee of
Wilrig AS and  Transocean  AS,  most  recently as Vice  President  International
Operations.  Mr. Facey holds a Bachelor of Science  Degree in Civil  Engineering
from the University of Virginia.

       C.  Christopher  Gaut joined the Company in December 1987 and was elected
Treasurer  and Chief  Financial  Officer  in  February  1988 and Vice  President
Finance in January 1991. Mr. Gaut holds a Bachelor of Arts Degree in Engineering
Science from Dartmouth College and a Master of Business Administration Degree in
Finance from The Wharton School of the University of Pennsylvania.

       H. E. Malone joined the Company in August 1987 and was elected Controller
and Chief Accounting Officer in January 1988 and Vice President - Controller and
Chief Accounting Officer in February 1995. Mr. Malone holds Bachelor of Business
Administration  Degrees  from The  University  of Texas and  Southern  Methodist
University and a Master of Business Administration Degree from the University of
North Texas.

      Philip J. Saile  joined the Company in August  1987 and was  elected  Vice
President  Operations in February 1999, to be effective April 1, 1999.  Prior to
his  appointment,  Mr.  Saile  served the  Company in various  capacities,  most
recently as Unit Manager for the North America  Unit.  Mr. Saile hold a Bachelor
of Business Administration degree from the University of Mississippi.

       Frank  B. Williford joined  the Company and was elected Vice  President -
Engineering  in  February 1996.  From  January  1966  through  January 1996, Mr.
Williford served in various  capacities as an employee of Sedco,  Inc. and Sedco
Forex, most recently as  Vice  President and  General  Manager  of  Engineering.
Mr.  Williford  holds a Bachelor  of Science  Degree in  Structural  Engineering
from Texas A&M University.

       Richard A. LeBlanc joined the Company in July 1989 as Manager of Finance.
He assumed  responsibilities  for the investor  relations function in March 1993
and was elected  Treasurer in May 1995.  Mr. LeBlanc holds a Bachelor of Science
Degree in Finance and a Master of Business  Administration degree from Louisiana
State University.

       Officers each serve for a one-year  term or until  their  successors  are
elected and qualified to serve. Mr. Thorne and Mr. Malone are brothers-in-law.

     Employees

       The Company had approximately  3,100 full-time  employees worldwide as of
February 1, 1999.  The Company  considers  relations  with its  employees  to be
satisfactory.  None of the  Company's  domestic  employees  are  represented  by
unions.  The Company has not  experienced  any  significant  work  stoppages  or
strikes as a result of labor disputes.



                                       7
<PAGE>

Item 2. Properties

     Contract Drilling

       The following  table  provides  certain  information  about the Company's
drilling rig fleet as of February 15, 1999:

<TABLE>
<CAPTION>

JACKUP RIGS
- -----------
            Year Built/                          Water Depth/      Current            Current
Rig Name      Rebuilt        Rig Make            Rated Depth       Location           Customer
- --------      -------        --------            -----------       --------           --------
<S>          <C>          <C>                    <C>             <C>                  <C>
North America
ENSCO 51       1981       FG-780II-C             300'/25,000'    Gulf of Mexico       Santa Fe
ENSCO 54     1982/1997    FG-780II-C             300'/25,000'    Gulf of Mexico       Taylor Energy
ENSCO 55     1981/1997    FG-780II-C             300'/25,000'    Gulf of Mexico       Newfield
ENSCO 60     1981/1997    Lev-111-C              300'/25,000'    Gulf of Mexico       BP Amoco
ENSCO 64       1973       MLT-53-S               250'/30,000'    Gulf of Mexico       Prime
ENSCO 67     1976/1996    MLT-84-S               400'/30,000'    Gulf of Mexico       Available(1)
ENSCO 68       1976       MLT-84-S               350'/30,000'    Gulf of Mexico       Sonat
ENSCO 69     1976/1995    MLT-84-S               400'/25,000'    Gulf of Mexico       Murphy
ENSCO 81       1979       MLT-116-C              350'/25,000'    Gulf of Mexico       Exxon
ENSCO 82       1979       MLT-116-C              300'/25,000'    Gulf of Mexico       Chevron
ENSCO 83       1979       MLT-82 SD-C            250'/25,000'    Gulf of Mexico       Vastar
ENSCO 84       1981       MLT-82 SD-C            250'/25,000'    Gulf of Mexico       Available(1)
ENSCO 86       1981       MLT-82 SD-C            250'/30,000'    Gulf of Mexico       Exxon
ENSCO 87       1982       MLT-116-C              350'/25,000'    Gulf of Mexico       Remington
ENSCO 88       1982       MLT-82 SD-C            250'/25,000'    Gulf of Mexico       Prime
ENSCO 89       1982       MLT-82 SD-C            250'/25,000'    Gulf of Mexico       Exxon
ENSCO 90       1982       MLT-82 SD-C            250'/25,000'    Gulf of Mexico       Shell
ENSCO 93       1982       MLT-82 SD-C            250'/25,000'    Gulf of Mexico       Chevron
ENSCO 94       1981       Hitachi-250-C          250'/25,000'    Gulf of Mexico       Energy Partners
ENSCO 95       1981       Hitachi-250-C          250'/25,000'    Gulf of Mexico       Chevron
ENSCO 98       1977       MLT-82 SD-C            250'/25,000'    Gulf of Mexico       Cockrell Oil
ENSCO 99       1985       MLT-82 SD-C            250'/30,000'    Gulf of Mexico       Exxon

Europe
ENSCO 70     1981/1996    Hitachi-300-C NS       250'/30,000'    The Netherlands      NAM (Shell)
ENSCO 71     1982/1995    Hitachi-300-C NS       225'/25,000'    The Netherlands      NAM (Shell)
ENSCO 72     1981/1996    Hitachi-300-C NS       225'/25,000'    The Netherlands      Burlington
ENSCO 80     1978/1995    MLT-116-CE             225'/30,000'    United Kingdom       Shell
ENSCO 85     1981/1995    MLT-116-C              225'/25,000'    The Netherlands      Stacked(1)
ENSCO 92     1982/1996    MLT-116-C              225'/25,000'    United Kingdom       Conoco
ENSCO 100      1987       MLT-150-88-C           325'/30,000'    Norway               Smedvig(2)

Asia Pacific
ENSCO 50     1983/1998    FG-780II-C             300'/25,000'    Singapore            Stacked(1)
ENSCO 52     1983/1997    FG-780II-C             300'/25,000'    Singapore            Available(1)
ENSCO 53     1982/1998    FG-780II-C             300'/25,000'    Singapore            Stacked(1)
ENSCO 56     1982/1997    FG-780II-C             300'/25,000'    Australia            Apache
ENSCO 57     1982/1997    FG-780II-C             300'/25,000'    Thailand             Unocal
ENSCO 96     1982/1997    Hitachi-250-C          250'/25,000'    Abu Dhabi            Bunduq
ENSCO 97     1980/1997    MLT-82 SD-C            250'/25,000'    Qatar                Maersk
</TABLE>



                                       8
<PAGE>



BARGE RIGS
- ----------
               Year Built/                       Current           Current
Rig Name        Rebuilt          Rated Depth     Location          Customer
- --------        -------          -----------     --------          --------

ENSCO I(3)       1999              30,000'       Shipyard          Chevron
ENSCO II(3)      1999              30,000'       Shipyard          Chevron
ENSCO III(3)     1999              30,000'       Shipyard          Chevron
ENSCO V        1982/1996           15,000'       Venezuela         Available(1)
ENSCO VI       1991/1996           15,000'       Venezuela         Available(1)
ENSCO XI         1994              25,000'       Venezuela         Stacked(1)
ENSCO XII        1994              25,000'       Venezuela         Stacked(1)
ENSCO XIV        1994              25,000'       Venezuela         Stacked(1)
ENSCO XV         1994              25,000'       Venezuela         Stacked(1)
- --------------------------------------------------------------------------------

PLATFORM RIGS
- -------------
               Year Built/                       Current           Current
Rig Name        Rebuilt          Rated Depth     Location          Customer
- --------        -------          -----------     --------          --------

ENSCO 20(4)    1980/1992           25,000'       China             Arco
ENSCO 21       1982/1996           25,000'       Gulf of Mexico    Phillips
ENSCO 22       1982/1997           25,000'       Gulf of Mexico    Kerr-McGee
ENSCO 23       1980/1998           25,000'       Gulf of Mexico    Amerada Hess
ENSCO 24       1980/1998           25,000'       Gulf of Mexico    Exxon
ENSCO 25       1980/1998           30,000'       Gulf of Mexico    Available(1)
ENSCO 26(5)    1982/1999           30,000'       Gulf of Mexico    Exxon
ENSCO 29       1981/1997           30,000'       Gulf of Mexico    Texaco
- --------------------------------------------------------------------------------

JACKUP AND SEMISUBMERSIBLE RIGS UNDER CONSTRUCTION
- --------------------------------------------------

                                                    Water              Rated
Rig Name                      Type                  Depth              Depth
- --------                      ----                  -----              -----

ENSCO 101(6)         KFELS MOD V Independent          400'            30,000'
                     Leg Cantilever Jackup

ENSCO 7500(7)        Semisubmersible - Moored       7,500'            30,000'
                     or Dynamically Positioned
- ---------------------
Notes:
(1)  Rigs  classified as available are being actively  marketed and can commence
     work on short notice.  Stacked rigs do not have operating crews immediately
     available   and  may  require  some   recommissioning   before   commencing
     operations.
(2)  The ENSCO 100 is under a bareboat charter contract to Smedvig asa which the
     Company expects will last until the year 2000.
(3)  The ENSCO I, II and III are currently being  constructed at Halter Marine's
     shipyard in Orange, Texas with deliveries scheduled in the first and second
     quarters of 1999.
(4)  The ENSCO 20 is managed, but is not owned, by the Company.
(5)  The  ENSCO  26 is  presently  undergoing enhancements and upgrades prior to
     commencing a long-term  contract  with  Exxon.
(6)  The  ENSCO  101  is   under  construction  at  the  Keppel FELS shipyard in
     Singapore with delivery scheduled in the first quarter of 2000. The Company
     does not currently have a contract for this rig.
(7)  The ENSCO 7500 is being  constructed at Halter Marine's shipyard in Orange,
     Texas with delivery  scheduled in the second half of 2000. The rig is under
     a long-term contract with Burlington Resources.
- --------------------------------------------------------------------------------

       The  Company's  drilling  rigs consist of engines,  drawworks,  derricks,
pumps to circulate  the drilling  fluid,  blowout  preventers,  drill string and
related  equipment.  The engines  power a drive  mechanism  that turns the drill
string  and  drill  bit so that  the  hole is  drilled  by  grinding  subsurface
materials,  which are then  carried to the surface by the  drilling  fluid.  The
intended well depth and the drilling  conditions are the principal  factors that
determine the size and type of rig most suitable for a particular drilling job.

                                       9
<PAGE>

       Jackup  rigs  stand on the  ocean  floor  with  their  hull and  drilling
equipment  elevated  above the water on connected leg supports.  Jackup rigs are
generally  preferred in water depths of 350 feet or less.  All of the  Company's
jackup rigs are of the  independent  leg design.  The majority of the  Company's
jackup units are equipped with cantilevers,  which allow the drilling  equipment
to extend  outward from their hulls over fixed  platforms  enabling  drilling of
both  exploratory  and  development  wells.  The  jackup rig hull  supports  the
drilling  equipment,  jacking  system,  crews'  quarters,  storage  and  loading
facilities, helicopter landing pad and related equipment.

       Barge rigs are towed to the  drilling  location  and are held in place by
anchors while drilling  activities are conducted.  The Company's barge rigs have
all of the crews' quarters,  storage facilities and related equipment mounted on
floating barges, with the drilling equipment  cantilevered from the stern of the
barge.

       Platform  rigs are designed to be  temporarily  installed on  permanently
constructed  offshore  platforms.  The platform rig sections are lifted onto the
offshore  platforms with the use of heavy lift cranes.  A platform rig typically
stays at a  location  for a longer  period  of time than a jackup  rig,  because
several wells can be drilled from a single offshore platform.

       A  semisubmersible  rig is a  floating  offshore  drilling  unit that has
pontoons  and  columns  that,  when  flooded  with  water,  cause the unit to be
partially submerged to a predetermined depth.  Semisubmersibles can be held in a
fixed  location over the ocean floor by being either  anchored to the sea bottom
with mooring chains or dynamically positioned by computer-controlled propellers,
or  "thrusters."  The  Company's  new  semisubmersible  rig will be  capable  of
drilling  in  water  depths  up to  7,500  feet and can be  adapted  for  either
dynamically positioned or moored operations.

       Over the life of a  typical  rig,  several  of the major  components  are
replaced  due to normal  wear and tear.  All of the  Company's  rigs are in good
condition.

     Marine Transportation

       The Company has a marine transportation fleet of 36 vessels consisting of
five anchor handling tug supply vessels, 23 supply vessels and eight mini-supply
vessels.  All of the  Company's  marine  transportation  vessels  are  currently
located  in the  Gulf  of  Mexico.  Substantially  all of the  Company's  marine
transportation  vessels, which had a combined net book value of $39.0 million at
December 31, 1998,  are pledged as collateral to secure  payment of secured term
loans with an outstanding balance of $8.1 million at December 31, 1998.

       The  following  table  provides,   as  of  February  15,  1999,   certain
information regarding the Company's marine transportation vessels:

                                  MARINE FLEET
                                  ------------

                  No. Of    Year          Horse
   Vessel Type    Vessels   Built         Power        Length       Location
   -----------    -------   -----         -----        ------       --------

   KODIAK - AHTS    1       1983          12,000        225'      Gulf of Mexico
   OTHER- AHTS      4     1975-1983    5,800-8,100    195'-230'   Gulf of Mexico
   SUPPLY          23     1976-1985    1,800-3,500    166'-220'   Gulf of Mexico
   MINI-SUPPLY      8     1981-1984        1,200      140'-146'   Gulf of Mexico

       Currently,  two of the  Company's  supply  vessels  and four  mini-supply
vessels  are  stacked.  Additional  vessels  may be  stacked  in 1999  as  their
drydocking requirements mature.

     Other Property

       The Company leases its executive  offices in Dallas,  Texas.  The Company
owns offices and other  facilities in Louisiana and Scotland.  The Company rents
office  space  in  Australia,  Abu  Dhabi,  Malaysia,  the  Netherlands,  Qatar,
Singapore, Thailand and Venezuela.


                                       10
<PAGE>


Item 3. Legal Proceedings

       The Company is from time to time involved in litigation incidental to the
conduct of its business.  In the opinion of management,  none of such litigation
in which  the  Company  is  currently  involved  would,  individually  or in the
aggregate,  have a material adverse effect on its financial condition or results
of operations.

Item 4. Submission of Matters to a Vote of Security Holders

       There  were no matters  submitted  to a vote of  security  holders in the
fourth quarter of 1998.



                                       11
<PAGE>




                                    PART II

Item 5. Market for Registrant's Common Equity and Related Stockholder Matters

       The  following  table sets  forth the high and low sales  prices for each
period  indicated  for the Company's  common stock,  $.10 par value (the "common
stock"),  for each of the last two fiscal  years,  adjusted for the  two-for-one
stock split on September 15, 1997:

                      First      Second        Third      Fourth
                     Quarter     Quarter      Quarter     Quarter        Year
                     -------     -------      -------     -------        ----

  1998 High.......   $33 9/16    $30 3/4      $18 7/16    $15 3/4     $33 9/16
  1998 Low........   $23 11/16   $16 7/16     $10 3/8     $ 8 11/16   $ 8 11/16

  1997 High.......   $29         $28          $39 3/4     $47         $47
  1997 Low........   $20 1/4     $20 15/16    $26 5/16    $28 3/8     $20 1/4

       The Company's Common Stock (Symbol:  ESV) is traded on the New York Stock
Exchange.  At February 1, 1999, there were  approximately  2,700 stockholders of
record of the Company's common stock.

       The Company  initiated  the payment of a $.025 per share  quarterly  cash
dividend on its common stock during the third  quarter of 1997.  Cash  dividends
per share paid in 1998 and 1997 were $.10 and $.05,  respectively.  The  Company
currently  intends  to  continue  to  pay  such  quarterly   dividends  for  the
foreseeable future.  However, the final determination of the timing,  amount and
payment of dividends on the common  stock is at the  discretion  of the Board of
Directors and will depend on, among other things,  the Company's  profitability,
liquidity, financial condition and capital requirements.





                                       12
<PAGE>

Item 6. Selected Consolidated Financial Data

       The  selected  consolidated  financial  data set forth below for the five
years in the period ended  December 31, 1998 has been derived from the Company's
audited consolidated  financial  statements.  This information should be read in
conjunction with the audited consolidated financial statements and notes thereto
included in "Item 8. Financial Statements and Supplementary Data."

<TABLE>
<CAPTION>
                                                                            Year  Ended  December 31,                          
                                                          ----------------------------------------------------------

                                                           1998         1997       1996(1)       1995         1994
                                                          ------       ------      -------      ------        ------

                                                                   (in millions, except per share amounts)
<S>                                                      <C>          <C>           <C>         <C>          <C>
Statement of Operations Data(2)

   Operating revenues .............................      $  813.2     $  815.1      $  468.8    $  279.1     $  245.5 
   Operating expenses .............................         344.5        321.0         238.3       165.5        144.6 
   Depreciation and amortization ..................          83.5        104.8          81.8        58.4         51.8 
                                                         --------     --------      --------    --------     -------- 
   Operating income ...............................         385.2        389.3         148.7        55.2         49.1
   Other expense, net .............................           2.7         13.5           6.0         7.9          8.8
                                                         --------     --------      --------    --------     --------
   Income from continuing operations before income                     
     taxes and minority interest ..................         382.5        375.8         142.7        47.3         40.3
   Provision for income taxes .....................         123.8        137.8          44.0         3.4          3.7
   Minority interest ..............................           4.8          3.1           3.3         2.1          3.0
                                                         --------     --------      --------    --------     --------
   Income from continuing operations ..............         253.9        234.9          95.4        41.8         33.6
   Income from discontinued operations(2) .........            --           --            --         6.3          3.6
                                                         --------     --------      --------    --------     --------
   Income before extraordinary item ...............         253.9        234.9          95.4        48.1         37.2
   Extraordinary item - extinguishment of debt ....            --         (1.0)           --          --           --
                                                         --------     --------      --------    --------     --------
   Net income .....................................         253.9        233.9          95.4        48.1         37.2
   Preferred stock dividend requirements ..........            --           --            --          --          2.2
                                                         --------     --------      --------    --------     --------
   Income applicable to common stock ..............      $  253.9     $  233.9      $   95.4    $   48.1     $   35.0
                                                         ========     ========      ========    ========     ========
   Basic earnings per share:(3)                              
     Continuing operations ........................      $   1.82     $   1.67      $    .73    $    .35     $    .27
     Discontinued operations ......................            --           --            --         .05          .03
     Extraordinary item ...........................            --         (.01)           --          --           --
                                                         --------     --------      --------    --------     -------- 
     Net income per share .........................      $   1.82     $   1.66           .73         .40          .31
                                                         ========     ========      ========    ========     ======== 
   Diluted earnings per share:(3)
     Continuing operations ........................      $   1.81     $   1.64      $    .72    $    .35     $    .27
     Discontinued operations ......................            --           --            --         .05          .03
     Extraordinary item ...........................            --         (.01)           --          --           --
                                                         --------     --------      --------    --------     --------
     Net income per share .........................      $   1.81     $   1.64      $    .72    $    .40     $    .30
                                                         ========     ========      ========    ========     ========
   Weighted average common shares outstanding:(3)          
     Basic ........................................         139.6        141.0         131.5       119.9        114.4
     Diluted ......................................         140.6        142.9         133.1       120.8        115.4

   Cash dividends per common share ................      $    .10     $    .05      $     --    $     --     $     -- 
                                                         ========     ========      ========    ========     ========   

Balance Sheet Data                                          
   Working capital ................................      $  316.9     $  316.2      $  107.5    $   78.9     $  129.2
   Total assets ...................................       1,992.8      1,772.0       1,315.4       821.5        773.1
   Long-term debt, net of current portion .........         375.5        400.8         258.6       159.2        162.5
   Stockholders' equity ...........................       1,245.0      1,076.7         845.9       531.2        488.0
</TABLE>
- ----------

(1) The Company  acquired Dual on June 12, 1996.  Statement of  Operations  Data
    include the results of Dual from the acquisition date.
(2) The Company sold its technical  services segment in 1995. Prior year results
    of the technical  service  segment have been  reclassified  for  comparative
    purposes. The 1995 results include a gain of $5.2 million in connection with
    the sale of the technical services segment.
(3) Earnings per share and weighted  average common shares  outstanding  amounts
    have been adjusted for the two-for-one stock split on September 15, 1997 and
    the  adoption  of  Statement  of  Financial  Accounting  Standards  No. 128,
    "Earnings per Share."

                                       13
<PAGE>


Item 7. Management's Discussion and Analysis of Financial Condition and Results
        of Operations

Business Environment

       ENSCO International Incorporated ("ENSCO" or the "Company") is one of the
leading  international  providers of offshore drilling and marine transportation
services to the oil and gas industry.  The Company's operations are concentrated
in the  geographic  regions of North  America,  Europe,  Asia  Pacific and South
America.

       Demand for the Company's services is significantly  affected by worldwide
expenditures  for oil and gas  drilling.  Expenditures  for oil and gas drilling
activity fluctuate based upon many factors including world economic  conditions,
the legislative  environment in the U.S. and other major  countries,  production
levels and other  activities  of OPEC and other oil and gas  producers,  and the
impact  that these and other  events have on the  current  and  expected  future
pricing of oil and natural gas.

       By many accounts,   current  industry  conditions are the worst that have
been experienced since the mid-1980's.  Concern over excess oil supplies, due in
part to the economic  slowdown in Southeast  Asia,  caused oil prices to plummet
during  1998.  As a result,  oil  companies  have  curtailed  or deferred  their
exploration and development  programs  causing a decrease in demand for drilling
rigs and marine  vessels.  As the demand for  drilling  rigs and marine  vessels
declines, day rates and utilization are adversely affected. The diametric change
in  industry  conditions  from  the  beginning  of  1998  until  the end of 1998
exemplifies  the  unpredictable  nature of oil and  natural  gas  prices and the
external factors that can affect those prices. Although members of OPEC and some
other oil and gas  producers  have  attempted to reduce oil  production  levels,
there can be no assurance that these efforts will reduce oil  production  levels
or if or when these measures will increase oil prices.

       The Company currently  expects that day rates and utilization  levels for
drilling rigs and marine transportation  vessels will continue to deteriorate in
1999 as a result of current  industry  conditions  and  expected  reductions  in
spending for  exploration  and  development  programs by oil  companies in 1999.
These  reductions  in day rates and  utilization  levels will have a significant
adverse effect on the Company's  revenues,  operating income and net income.  If
current  conditions  persist  throughout  1999, the Company  anticipates it will
incur a net loss for 1999.  See "Outlook  and  Forward-Looking  Statements"  for
further  information  about how the current business  environment is expected to
impact the Company's future operations and financial results.

Results of Operations

      The Company  achieved  another  successive year of record results in 1998,
however,  earnings have been on a downward  trend from the first quarter of 1998
as the business environment has deteriorated. The following table highlights the
Company's  consolidated  operating  results  for each of the three  years in the
period ended December 31, 1998 (in millions):

                                                  1998         1997       1996 
                                                --------     --------   --------
Operating Results
- -----------------
  Revenues ...................................   $ 813.2      $ 815.1    $ 468.8
  Operating expenses .........................     344.5        321.0      238.3
  Depreciation and amortization...............      83.5        104.8       81.8
                                                 -------      -------    -------
  Operating income ...........................     385.2        389.3      148.7
  Other expense, net .........................       2.7         13.5        6.0
  Provision for income taxes .................     123.8        137.8       44.0
  Minority interest ..........................       4.8          3.1        3.3
                                                 -------      -------    -------
  Income before extraordinary item ...........     253.9        234.9       95.4
  Extraordinary item - extinguishment of debt.        --         (1.0)        --
                                                 -------      -------    -------
  Net income .................................   $ 253.9      $ 233.9    $  95.4
                                                 =======      =======    =======

      The Company  acquired DUAL  DRILLING  COMPANY  ("Dual") in June 1996.  The
Company's 1996 results include the  results  of  Dual from the acquisition date.
See Note 2 to the Consolidated Financial Statements.


                                       14
<PAGE>


      The  following  is an analysis of the  Company's  revenues  and  operating
margin for each of the three  years in the period  ended  December  31, 1998 (in
millions):

                                                   1998        1997        1996
                                                  ------      ------      ------
Revenues
   Contract drilling
        Jackup rigs
          North America ........................  $324.1      $357.9      $197.2
          Europe ...............................   217.4       173.8        91.8
          Asia Pacific(1) ......................    78.3        80.0        23.8
                                                  ------      ------      ------
            Total jackup rigs ..................   619.8       611.7       312.8
        Barge rigs - South America .............    71.1        82.8        75.5
        Platform rigs (1) ......................    42.6        26.4        20.3
                                                  ------      ------      ------
            Total contract drilling ............   733.5       720.9       408.6
                                                  ------      ------      ------
   Marine transportation
        AHTS (2) ...............................    18.4        22.2        16.1
        Supply .................................    52.7        60.9        36.5
        Mini-supply ............................     8.6        11.1         7.6
                                                  ------      ------      ------
            Total marine transportation ........    79.7        94.2        60.2
                                                  ------      ------      ------
                 Total .........................  $813.2      $815.1      $468.8
                                                  ======      ======      ======

Operating Margin (3)
   Contract drilling
        Jackup rigs
          North America ........................  $200.9      $240.8      $106.4
          Europe ...............................   155.7       117.7        40.3
          Asia Pacific (1) .....................    35.7        36.2         7.9
                                                  ------      ------    --------
            Total jackup rigs ..................   392.3       394.7       154.6
        Barge rigs - South America .............    34.6        48.7        49.0
        Platform rigs (1) ......................    18.9         8.0         5.5
                                                  ------      ------    --------
            Total offshore rigs ................   445.8       451.4       209.1
        Land rig (4) ...........................      --          --          .7
                                                  ------      ------   ---------
            Total contract drilling ............   445.8       451.4       209.8
                                                  ------      ------     -------

   Marine transportation
        AHTS (2) ...............................     8.8        12.6         8.1
        Supply .................................    26.0        38.0        20.0
        Mini-supply ............................     3.5         6.4         3.6
                                                  ------      ------      ------
            Total marine transportation ........    38.3        57.0        31.7
                                                  ------      ------      ------
                 Total .........................  $484.1      $508.4      $241.5
                                                  ======      ======      ======

(1) The Company acquired its Asia Pacific and platform  rigs  in  the June  1996
    Dual acquisition.
(2) Anchor handling tug supply vessels.
(3) Defined  as  operating   revenues  less  operating   expenses  exclusive  of
    depreciation and amortization and general and administrative expenses.
(4) The Company sold its remaining land rig in July 1996.



                                       15
<PAGE>




       Discussions  relative to each of the  Company's  operating  segments  and
geographic operations are set forth below.

       Contract  Drilling.  The  following  is  an  analysis  of the  geographic
locations of the Company's offshore drilling rigs at December 31, 1998, 1997 and
1996.

                                                  1998     1997     1996
                                                  ----     ----     ----
       Jackup rigs:
               North America ..............        22       22       23 
               Europe .....................         7        7        6       
               Asia Pacific ...............         7(1)     7(1)     6(1)
                                                  ---      ---      --- 
                       Total jackup rigs ..        36       36       35
       Barge rigs - South America .........         6(2)    10       10   
       Platform rigs ......................         8(3)     8(3)     8(3)
                                                  ---      ---      --- 
                       Total ..............        50       54       53
                                                  ===      ===      ===

  (1)   Includes one jackup rig operated by the Company that was  previously 49%
        owned. The Company acquired the remaining 51% interest in May 1997.
  (2)   Four barge rigs were sold in October 1998.
  (3)   Seven are located in the Gulf of Mexico and one,  which is not owned but
        is operated  under a  management  contract,  is located off the coast of
        China.

       In 1998,  revenues for the contract  drilling segment  increased by $12.6
million,  or 2%, while operating margin  decreased by $5.6 million,  or 1%, from
1997.  The increase in revenues is due primarily to a 5% increase in average day
rates for the Company's jackup rigs, and a 33% increase in average day rates for
the Company's  platform  rigs.  In addition,  the  acquisition  of the ENSCO 100
jackup rig, in December 1997, increased revenues by $14.2 million in 1998. These
increases  were offset in part by a decrease in  utilization  for the  Company's
jackup rigs, to 88% in 1998 from 93% in 1997, and the sale of four barge rigs in
Venezuela in October 1998. The contract drilling operating margin was negatively
impacted  by an $18.2  million,  or 7%,  increase  in  operating  expenses.  The
increase in operating expenses is due primarily to higher wages and benefits and
increased oilfield equipment and materials costs.

       In 1997,  revenues for the contract  drilling segment increased by $312.3
million, or 76%, and operating margin increased by $241.6 million, or 115%, from
1996. The increase in revenues and operating margin is primarily attributable to
an increase in average day rates,  which increased 52% for the contract drilling
segment overall. In addition,  revenues increased approximately $90.7 million as
a  result  of a full  year  of  operations  of the  rigs  acquired  in the  Dual
acquisition and other rig acquisitions in 1996 and 1997. The Company's  contract
drilling  operating  margin was negatively  impacted by an increase in operating
expenses  of $70.7  million in 1997 as  compared  to 1996.  Approximately  $41.3
million, or 58%, of the increase in operating expenses resulted from a full year
of  operations  of the rigs  acquired  in the Dual  acquisition  and  other  rig
acquisitions in 1996 and 1997. The remaining  increase in operating  expenses is
primarily due to higher  personnel  costs for offshore rig workers and increased
oilfield equipment and materials costs.

    North America Jackup Rigs

       In 1998,  revenues for the North America  jackup rigs  decreased by $33.8
million,  or 9%, and operating margin decreased by $39.9, or 17%, as compared to
1997.  The  decrease in revenues  and  operating  margin is due  primarily to an
approximate  7% decrease in average day rates and a decrease in  utilization  to
93% in 1998 from 96% in 1997. In addition to the decrease in revenues, operating
margin was negatively  impacted by a $6.1 million increase in operating expenses
in 1998,  due  primarily to higher wages and  benefits  and  increased  oilfield
equipment and materials costs.

       In 1997,  revenues  for North  America  jackup rigs  increased  by $160.7
million,  or 81%, and operating  margin  increased  $134.4 million,  or 126%, as
compared to 1996.  The  increase in revenues and  operating  margin is primarily
attributable  to a 67% increase in average day rates in 1997, and an increase in
utilization  to 96% in 1997  from 93% in 1996.  In  addition,  the 1997  results
benefitted  from a full year of  operations  from the rigs  acquired in the Dual
acquisition,  contributing  an  additional  $28.0  million in revenues and $18.2
million in operating margin from the prior year results.


                                       16
<PAGE>

    Europe Jackup Rigs

       In 1998,  revenues for the Europe jackup rigs increased by $43.6 million,
or 25%, and operating margin increased by $38.0 million,  or 32%, as compared to
1997.  The increase in revenues and  operating  margin is due primarily to a 20%
increase in average  day rates in 1998 as  compared to 1997 and the  addition of
the ENSCO 100 jackup  rig,  in  December  1997,  which  added  revenues of $14.2
million in 1998.  These  increases in revenues were offset in part by a decrease
in utilization to 97% in 1998 as compared to 100% in 1997.  Operating margin was
negatively  impacted by a $5.6 million  increase in operating  expenses in 1998,
due primarily to higher wages and benefits and increased  oilfield equipment and
materials costs.

       In 1997,  revenues for the Europe jackup rigs increased $82.0 million, or
89%, and operating margin increased $77.4 million, or 192%, as compared to 1996.
The increase in revenues and operating margin is primarily due to an increase in
average day rates of 67% in 1997, and an increase in utilization to 100% in 1997
from 88% in  1996.  Three of the  Europe  jackup  rigs  were in a  shipyard  for
modifications   and  enhancements   during  part  of  1996  resulting  in  lower
utilization.

    Asia Pacific Jackup Rigs

       In 1998,  revenues  for the Asia  Pacific  jackup rigs  decreased by $1.7
million,  or 2%,  and  operating  margin  decreased  by $.5  million,  or 1%, as
compared to 1997.  The  decrease in revenues is due  primarily  to a decrease in
utilization,  to 61% in 1998 as compared to 79% in 1997, offset in part by a 25%
increase in average day rates.  The decrease in  utilization  is due to shipyard
downtime  and  additional  idle time  resulting  from the  slowdown  in drilling
activity in Southeast Asia.

       In 1997,  revenues  for the Asia  Pacific  jackup  rigs  increased  $56.2
million, or 236%, and operating margin increased by $28.3 million, or 358%, from
1996.  Prior to the Dual acquisition in June 1996, the Company had no operations
in the Asia Pacific region. Consequently, the increase in revenues and operating
margin in 1997,  as compared to 1996, is  significantly  enhanced as a result of
the partial year of operations in 1996.  Additionally,  the Company  purchased a
jackup rig located in Southeast Asia in November 1996,  relocated another jackup
rig from the Gulf of Mexico to Southeast  Asia in the first quarter of 1997, and
purchased the remaining 51% interest in a jointly-owned  jackup rig in May 1997.
Average day rates  increased 47% in 1997 while  utilization  decreased to 79% in
1997 from 86% in 1996.  The decrease in  utilization  in 1997 is due to shipyard
downtime.  During 1997,  all of the Asia Pacific jackup rigs were in a shipyard,
or mobilizing  to a shipyard,  for a portion of the year for  modifications  and
enhancements.

    South America Barge Rigs

       In 1998,  revenues for the South  America  barge rigs  decreased by $11.7
million,  or 14%, and operating  margin  decreased by $14.1 million,  or 29%, as
compared to 1997. The decrease in revenues and operating margin is due primarily
to the sale of four barge rigs in October 1998 whose  initial  contract  periods
expired during the second quarter of 1998.

       In October 1998, the Company sold the four barge rigs whose contracts had
expired to Petroleos de Venezuela  ("PDVSA") for cash proceeds of $49.4 million.
PDVSA  purchased  the rigs  pursuant to a purchase  option  provided  for in the
original  charter  agreement.  The Company  and PDVSA are in dispute  concerning
additional  consideration  the  Company  believes  it is  entitled  to under the
charter agreement for  reimbursement of taxes,  liabilities and costs related to
the sale.  The parties have yet to agree on the amount and method of calculating
such additional payment. In connection with the sale, the Company and PDVSA have
agreed to reserve  their rights for  resolution of these  contractual  disputes.
Based on the cash  proceeds  received from the sale,  the Company  recognized an
insignificant  gain after taxes and required  payment of $4.8 million to ENSCO's
minority interest holder.  Any additional  proceeds  collected in future periods
will be recognized as income when received.

       In  January  1999,  the  contracts  for the  remaining  six barge rigs in
Venezuela were terminated early by PDVSA. Four of these barge rig contracts were
scheduled  to  expire  in the third  quarter  of 1999.  As a result of the early
termination  of the contracts for these four rigs,  ENSCO  received from PDVSA a
lump sum  payment of $13.5  million in January  1999.  The two other  barge rigs
whose contracts were terminated early were originally scheduled to expire in May
and July 1999.  In  January  1999,  PDVSA  paid $5.2  million to ENSCO for early
termination of these two contracts.  All of these  termination  payments will be
recognized as income in the first quarter of 1999.

                                       17
<PAGE>

       In 1997,  revenues increased $7.3 million, or 10%, while operating margin
remained  flat as compared to 1996.  The lack of increase in  operating  margin,
despite the  increase in  revenues,  is  primarily  due to the  structure of the
Company's contracts with PDVSA. Under these contracts, the Company is reimbursed
through its day rate for  inflationary  cost increases in Venezuela,  therefore,
the increase in revenues effectively reimburses the Company for cost increases.

    Platform Rigs

       In 1998,  revenues for the platform rigs increased by $16.2  million,  or
61%, and operating  margin  increased by $10.9 million,  or 136%, as compared to
1997. The increase in revenues is due to an increase in  utilization,  to 89% in
1998  from 63% in  1997,  and a 33%  increase  in day  rates.  The  increase  in
utilization  is due primarily to less  shipyard  downtime in 1998 as compared to
1997 and  reduced  idle  time due to  increased  demand.  Operating  margin  was
negatively  impacted by a $5.3  million  increase  in  operating  expenses.  The
increase in operating expenses is due primarily to the additional operating days
in 1998.

       Marine Transportation.  The Company currently has a marine transportation
fleet of 36 vessels,  consisting of five anchor handling tug supply vessels,  23
supply  vessels and eight  mini-supply  vessels.  In September  1998, one of the
Company's  large  anchor  handling  tug supply  vessels  sank  while  supporting
drilling  operations for a customer in the Gulf of Mexico.  The vessel was fully
insured and the Company  recognized a gain on the loss of the vessel (see "Other
Income (Expense)" and Note 3 to the Company's Financial Statements).  All of the
Company's marine transportation vessels are located in the Gulf of Mexico.

       In 1998,  revenues  for the marine  transportation  segment  decreased by
$14.5 million,  or 15%, and operating margin decreased by $18.7 million, or 33%.
The decrease in revenues and operating  margin is due primarily to a decrease in
utilization,  to 81% in 1998 from 91% in 1997,  and a 5% decrease in average day
rates. In addition,  revenues decreased due to the loss of a vessel in September
1998.  Operating  expenses  increased  $4.2  million,  or 11%, due  primarily to
increased drydocking expense and higher personnel costs.

       In  1997,  revenues  for  the  Company's  marine  transportation  segment
increased $34.0 million,  or 56%, and operating  margin increased $25.3 million,
or 80%, as compared to 1996.  The increase in revenues and  operating  margin is
due to an approximate  $2,700, or 53%, increase in average day rates in 1997 and
an increase in utilization to 91% in 1997 from 89% in 1996.

       Depreciation  and  Amortization.  In 1998,  depreciation and amortization
decreased by $21.3  million,  or 20%, due primarily to a change in the estimated
useful lives of the Company's drilling rigs and marine vessels effective January
1, 1998.  Based on an engineering and economic study of the Company's asset base
completed in the fourth quarter of 1997, the depreciable  lives of the Company's
drilling  rigs and marine  vessels  were  extended  by an average of five to six
years. The effect of this change on the Company's financial results for the year
ended  1998 was to reduce  depreciation  expense by $35.2  million,  or $.25 per
basic and diluted  share.  The decrease in  depreciation  expense  caused by the
increase in the estimated useful lives was offset in part by the increase in the
Company's asset base resulting from  acquisitions in 1997 and capital  additions
to drilling rigs and marine vessels during 1997 and 1998.

       In 1997,  depreciation and amortization  expense increased $23.0 million,
or 28%, as compared to 1996. The increase in  depreciation  and  amortization is
primarily due to a full year of  depreciation  and goodwill  amortization on the
assets acquired in the Dual acquisition, as well as additional depreciation from
other asset acquisitions and modifications and enhancements to existing assets.

       General and Administrative.  In 1998, general and administrative expenses
increased by $1.1 million,  or 8%, as compared to 1997.  The increase in general
and administrative  expenses is due primarily to increased professional fees and
higher personnel costs.

       In 1997, general and administrative  expenses increased $3.3 million,  or
30%,  as  compared  to 1996,  due  primarily  to a full year of expense  for the
additional  personnel added in conjunction  with the Dual acquisition and higher
performance based compensation and benefits costs.


                                       18
<PAGE>


       Other Income  (Expense).  Other  income  (expense) for  each of the three
years in the period ended  December 31,  1998 is as follows (in millions):

                                    1998          1997           1996 
                                   ------        ------         ------

      Interest income ..........  $  15.1       $   7.4        $   4.5 
      Interest expense, net ....    (26.2)        (21.4)         (20.8)
      Other, net ...............      8.4            .5           10.3 
                                  -------       -------        -------
                                  $  (2.7)       $(13.5)       $ (6.0)
                                  =======       =======        =======

       Interest  income  increased  in 1998 as  compared  to 1997 due to  higher
average outstanding cash balances. The increase in cash is primarily a result of
increased  cash flow from  operations  and cash  received  from the  issuance of
$300.0 million in public debt in November 1997. Interest expense,  net increased
in 1998 as  compared  to 1997 as a result of  higher  average  debt  outstanding
offset in part by a $4.9 million increase in capitalized interest.  The increase
in debt is due to the  issuance of $300.0  million in public debt offset in part
by the retirement of other debt outstanding.  The increase in Other, net in 1998
as compared to 1997 is due  primarily to a $10.0  million  gain  recorded on the
loss of the Kodiak II marine  vessel  which  sank in  September  1998.  The gain
represents the insurance proceeds in excess of the net book value of the vessel.

       Interest  income  increased  in 1997 as  compared  to 1996 due to  higher
average  cash  balances.  Other,  net  decreased in 1997 as compared to 1996 due
primarily to a $6.4 million litigation  settlement  received in 1996 (see Note 8
to the Consolidated Financial Statements) and other non-recurring income in 1996
of $2.9 million  related to the  disposition of securities  previously  received
from the sale of the Company's technical services operations in 1995.

       Provision for Income Taxes.  For the years ended December 31, 1998,  1997
and 1996 the Company  recorded  provisions  for income taxes of $123.8  million,
$137.8  million and $44.0  million,  resulting in effective  tax rates of 32.4%,
36.7%  and  30.8%,  respectively.  In 1998,  the  Company's  effective  tax rate
decreased  as compared to 1997 due  primarily  to a  favorable  settlement  of a
foreign  tax matter and an  adjustment  of prior year  accruals.  The  Company's
effective  tax rate and provision for income taxes  increased  significantly  in
1997 as compared to 1996 due  primarily to the  increased  profitability  of the
Company and the recognition,  in 1996, of the remaining net operating losses for
financial  reporting  purposes.  The Company's effective tax rate varies between
years due  primarily  to the  Company's  level of  profitability,  the  expected
utilization  or  non-utilization  of U.S. net operating loss  carryforwards  and
foreign taxes. See Note 7 to the Company's Consolidated Financial Statements.

Liquidity and Capital Resources

       Cash Flow from Operations and Capital Expenditures.
       ---------------------------------------------------

                                                      Year Ended December 31,
                                                  ------------------------------
                                                   1998        1997        1996
                                                  ------     -------     -------
                                                          (in millions)
   
      Cash flow from operations ................ $ 448.7     $ 336.6     $ 198.6
                                                  =======    =======     =======
      Capital expenditures:
           Sustaining .......................... $  44.1     $  30.6     $  19.3
           Enhancements ........................   159.6       131.8        99.4
           New construction and acquisitions ...   127.1       119.9        57.3
                                                 -------     -------     -------
                                                 $ 330.8     $ 282.3     $ 176.0
                                                 =======     =======     =======

     In 1998, cash flow from  operations  increased  $112.1 million,  or 33%, as
compared  to  1997.  The 1998  increase  in cash  flow  from  operations  is due
primarily  to  working  capital  changes.  In 1997,  cash flow  from  operations
increased $138.0 million, or 69%, as compared to 1996. The 1997 increase in cash
flow from operations is primarily a result of improved  operating results offset
in part by cash used for working capital changes.


                                       19
<PAGE>


       As part of the Company's ongoing enhancement program,  $390.8 million has
been  invested  over the  last  three  years in  upgrading  the  capability  and
extending the service lives of the Company's  drilling rigs and marine  vessels.
In  addition,  the  Company  has added to its  fleet of  drilling  rigs  through
acquisitions.  In  December  1997,  the  Company  acquired a harsh  environment,
Gorilla class,  jackup rig located in the North Sea and, in May 1997,  purchased
the remaining 51% interest of a previously  jointly-owned  jackup rig located in
Southeast Asia. In 1996, the Company  acquired a jackup rig located in Southeast
Asia and made the final  payment on a jackup rig,  purchased  in 1995,  which is
located in the North Sea. Not included in the cash expenditure  amounts above is
the 10.1 million  shares (20.1 million  shares giving effect to the  two-for-one
stock split on September  15, 1997) of common stock,  valued at $218.4  million,
issued in the acquisition of Dual.

       In  addition  to  the  Company's  enhancement  program,  the  Company  is
currently  completing  the  construction  of  three  new  barge  rigs  for  Lake
Maracaibo,  Venezuela,  which will  operate  under  five-year  contracts  for an
affiliate of Chevron  Corporation.  The barge  drilling rigs are projected to be
delivered  during the first and second  quarters of 1999.  The Company  also has
under construction an international  class, harsh environment,  jackup rig and a
semisubmersible  drilling  rig.  The jackup  rig,  an  enhanced  KFELS MOD V, is
scheduled for delivery during the first quarter of 2000. Currently,  the Company
does not have a contract  for this new jackup rig.  The  semisubmersible  rig is
being constructed under a contract for Burlington  Resources.  Completion of the
semisubmersible rig is expected in the second half of 2000.

       Capital expenditures,  including capitalized interest, related to the new
construction  projects will be approximately  $240.0  million in 1999 and $130.0
million in 2000. In addition,  management  anticipates that capital expenditures
will be  approximately  $30.0 million for existing  operations and $30.0 million
for upgrades and enhancements in 1999. The Company may spend additional funds to
construct or acquire rigs or vessels in 1999 depending on market  conditions and
opportunities.

       Financing and Capital  Resources.  The Company's  long-term  debt,  total
capital and debt to capital  ratios are  summarized  below (in millions,  except
percentages):
                                                     At December 31,
                                            --------------------------------- 
                                             1998         1997        1996   
                                            --------     --------    --------

      Long-term debt ...................... $  375.5     $  400.8    $  258.6
      Total capital .......................  1,620.5      1,477.5     1,104.5
      Long-term debt to total capital .....    23.2%        27.1%       23.4%

       In May  1998,  the  Company  entered  into  a  $185.0  million  unsecured
revolving credit  agreement (the "Credit  Agreement") with a syndicate of banks.
Interest on amounts  borrowed under the Credit Agreement are based on LIBOR plus
an applicable  margin rate  (currently  .4%)  depending on the Company's  credit
rating. The Company also pays a commitment fee (currently .15% per annum) on the
undrawn  portion  of the  available  credit  line,  which  is also  based on the
Company's credit rating.  The Company is required to maintain certain  financial
covenants  under the  Credit  Agreement  which  include  the  Company  meeting a
specified level of interest coverage, assets to indebtedness, leverage ratio and
tangible  net worth.  As of December 31,  1998,  the Company had $185.0  million
available  for  borrowings  under the Credit  Agreement.  The  Credit  Agreement
matures in May 2003.

       The increase in  long-term  debt in 1997 as compared to 1996 is primarily
due to the  issuance  of $300.0  million of  unsecured  debt in a November  1997
public debt  offering.  The debt offering  consisted of $150.0  million of 6.75%
Notes due November 15, 2007 (the "Notes") and $150.0 million of 7.20% Debentures
due  November 15, 2027 (the  "Debentures").  The Notes and the  Debentures  were
issued pursuant to a $500.0 million universal shelf registration statement filed
with the  Securities  and Exchange  Commission in October 1997. The net proceeds
from the  offering  totaled  approximately  $287.8  million  after  selling  and
underwriting discounts and the settlement of interest rate hedges. Approximately
$75.0 million of the net proceeds  were used to retire the  Company's  revolving
credit  facility and $103.2  million of the net proceeds  were used to acquire a
harsh  environment,   Gorilla  class,   jackup  rig.  The  Company  recorded  an
extraordinary  charge in the  fourth  quarter of 1997 for $1.0  million,  net of
income taxes, to write-off the remaining  deferred  financing  costs  associated
with the revolving  credit  facility.  See Note 4 to the Company's  Consolidated
Financial Statements.


                                       20
<PAGE>


       The  Company's  total  capital  increased in 1998 as compared to 1997 due
primarily  to the  profitability  of the Company in 1998,  offset in part by the
repurchase of approximately  5.5 million shares of the Company's common stock at
a cost of $74.2 million, and payment of cash dividends of $14.1 million in 1998.
Total  capital of the Company  increased  in 1997 as compared to 1996 due to the
profitability of the Company in 1997 and the increase in long-term debt.

       The  Company's  liquidity  position is  summarized in the table below (in
millions, except ratios):

                                              At December 31,                   
                                       ----------------------------             
                                       1998         1997       1996   
                                       ----         ----       ----   

       Cash and cash equivalents .... $330.1       $262.2     $ 80.7
       Working capital ..............  316.9        316.2      107.5
       Current ratio ................    3.0          3.4        2.0

       Based on the  current  financial  condition  of the  Company,  management
believes cash flow from  operations,  working  capital and its available  credit
line should be sufficient to fund the Company's  ongoing liquidity needs for the
foreseeable future. In addition,  the Company expects to secure a commitment for
additional   long-term  financing  guaranteed  by  the  United  States  Maritime
Administration  in  connection  with  the  construction  of the  semisubmersible
drilling rig.

Market Risk

       The Company occasionally uses derivative  financial  instruments to hedge
against its exposure to changes in foreign currencies.  The Company does not use
derivative financial instruments for trading purposes. The Company predominantly
structures  its drilling rig contracts in U.S.  dollars to mitigate its exposure
to fluctuations in foreign currencies.  The Company will, however,  from time to
time, hedge its known liabilities or projected payments in foreign currencies to
reduce the impact of foreign currency gains and losses in its financial results.
At December  31,  1998,  the Company had  foreign  currency  exchange  contracts
outstanding to exchange U.S. dollars for Dutch guilders, British pounds sterling
and Singapore  dollars totaling $52.3 million.  At December 31, 1998, there were
no  material  unrealized  gains or  losses  on open  foreign  currency  exchange
derivative hedges.  Management believes that the Company's hedging activities do
not expose the Company to any  material  interest  rate risk,  foreign  currency
exchange rate risk, commodity price risk or any other market rate or price risk.
See Note 11 to the Consolidated Financial Statements.

Year 2000 Update

       The Company has  completed  its  assessment  of its critical  information
technology  (IT)  systems  and non-IT  systems  and is  working  to correct  the
deficiencies  identified.  The  Company  believes  that  it  is on  schedule  to
successfully   implement  the  required  systems  and  equipment   modifications
necessary  to make  the  Company's  critical  systems  Year  2000  compliant  by
mid-1999.

       The Company's  critical IT systems are  comprised  primarily of a general
ledger  accounting  software package and related  application  modules,  a fixed
asset  system,  payroll  system  and  procurement  and  purchasing  system.  The
assessment  of the  Company's IT systems  found that some of the IT systems were
not Year 2000  compliant.  Changes to make these systems Year 2000 compliant are
being made in conjunction with the Company's planned upgrade cycle, which should
be completed by mid-1999.

       Non-IT systems are comprised primarily of computer  controlled  equipment
and electronic devices,  including equipment with embedded microprocessors which
are used to operate equipment on the Company's drilling rigs and marine vessels.
Additionally,  telephone systems and other office based electronic equipment are
considered in the assessment of non-IT systems. With respect to drilling rig and
marine vessel based systems,  the Company's assessment indicates that there will
be no disruption in the  operations of its drilling rigs and marine vessels as a
result of the Year 2000 problem.  The Company  conducted testing of its drilling
rig based equipment with manufacture  representatives  during the fourth quarter
of 1998 which  verified the Company's  assessment.  With respect to other office
based non-IT systems,  the Company's  assessment found that it will be necessary
to replace or modify some  existing  equipment,  which  should be  completed  by
mid-1999.


                                       21
<PAGE>

       The total cost to make all systems and equipment  Year 2000  compliant is
currently  estimated at $550,000,  including software and systems that are being
replaced in the Company's normal upgrade cycle.  Approximately $400,000 has been
spent in modifying and upgrading  systems and equipment to date. These estimates
do not include  internal  labor costs for employees who spend part of their time
working on the Company's Year 2000 project.

       The Company has initiated or received communication from most significant
suppliers,  customers  and financial  service  providers on the Year 2000 issue.
This communication has been used to determine the extent to which the Company is
vulnerable to these third parties' failure to remedy their own Year 2000 issues.
Although there is currently no indication that these business  partners will not
achieve their Year 2000  compliance  plans,  there can be no guarantee  that the
systems of other companies on which the Company relies will be timely converted.
Additionally,  there can be no guarantee  that the Company  will not  experience
Year 2000 problems. If the Company or its business partners experience Year 2000
compliance  problems,  material adverse business  consequences could result. The
Company  believes that the most likely negative  effects,  if any, could include
delays in payments to the Company  from  customers or payments by the Company to
suppliers and  disruptions  in shipments of equipment and materials  required to
operate the Company's drilling rigs and marine vessels.

       The Company has begun  contingency  planning for its Year 2000 issues and
is expected to have such plans completed by mid-1999.  The Company's contingency
planning will primarily focus on precautionary  measures related to the shipment
of equipment to foreign  countries and rig crew changes on or around  January 1,
2000.

Outlook and Forward-Looking Statements

       The Company currently  expects that day rates and utilization  levels for
drilling rigs and marine transportation  vessels will continue to deteriorate in
1999 as a result of current  industry  conditions  and  expected  reductions  in
spending for exploration  and development  programs by oil companies in 1999. As
day rates and utilization continue to decrease,  the Company's financial results
will  be  adversely  affected.  Due to the  short-term  nature  of  many  of the
Company's contracts and the unpredictable  nature of oil and natural gas prices,
which affect the demand for drilling activity, the extent of such adverse change
cannot  be  accurately   predicted.   However,  if  current  conditions  persist
throughout 1999, the Company  anticipates it will incur a net loss for 1999. The
duration of this market  downturn  depends on many  factors  that also cannot be
accurately predicted. Management does, however, remain positive on the long-term
outlook for the industry and for ENSCO.

       The decline  experienced in the offshore drilling markets has resulted in
the Company stacking  certain rigs and vessels.  The Company will stack its rigs
and vessels if it does not believe  there will be a market for the  equipment in
the  near-term  or if  sufficient  cash flow cannot be  generated  to cover cash
operating  costs.  In 1999,  the Company  expects that its Gulf of Mexico jackup
rigs will  experience  greater  downtime  as the  majority  of these rigs are on
short-term  contracts  and will be  competing  against many  available  rigs for
additional work.  Currently,  the Company has no plans to stack any of its North
America jackup rigs. In Europe, the Company has received notice that four of its
rigs working under long-term contracts previously scheduled through 1999 will be
terminated early during the first and second quarters of 1999. As a result,  the
Company anticipates stacking at least two of these rigs during the first half of
1999. In the Asia Pacific region,  three of the Company's rigs are currently not
under  contract.  The Company has stacked two of these rigs in the first quarter
of 1999. In South America,  the Company's six barge rigs are presently idle as a
result of early contract  terminations by PDVSA. The Company plans to market two
of the barge rigs and the remaining four barge rigs have been stacked. The three
new barge rigs under construction for Venezuela are expected to be delivered and
commence  drilling  under their  contracts  in the first and second  quarters of
1999.  In the marine  transportation  segment,  there are  currently  two supply
vessels  and  four  mini-supply  vessels  stacked.  Additional  vessels  will be
considered for stacking as their drydocking requirements mature in 1999.

                                       22
<PAGE>

       This  report  contains   forward-looking   statements  based  on  current
expectations  that  involve  a number  of risks  and  uncertainties.  Generally,
forward-looking   statements  include  words  or  phrases  such  as  "management
anticipates,"  "the Company  believes," "the Company  anticipates," "the Company
expects,"  "the  Company  plans" and words and  phrases of similar  impact,  and
include  but are not  limited to  statements  regarding  future  operations  and
business environment.  The forward-looking  statements are made pursuant to safe
harbor provisions of the Private  Securities  Litigation Reform Act of 1995. The
factors that could cause actual results to differ  materially  from those in the
forward-looking  statements include the following:  (i) industry  conditions and
competition,  (ii) cyclical nature of the industry, (iii) worldwide expenditures
for oil and gas  drilling,  (iv)  operational  risks  and  insurance,  (v) risks
associated  with  operating  in  foreign   jurisdictions,   (vi)   environmental
liabilities  which may arise in the future which are not covered by insurance or
indemnity,   (vii)  the  impact  of  current  and  future  laws  and  government
regulation, as well as repeal or modification of same, affecting the oil and gas
industry and the Company's operations in particular, (viii) changes in the dates
the  Company's  rigs being  constructed  or  undergoing  enhancement  will enter
service,  (ix)  renegotiation,   nullification,  or  breach  of  contracts  with
customers or other parties,  and (x) the risks described  elsewhere,  herein and
from time to time in the Company's  other reports to the Securities and Exchange
Commission.

New Accounting Pronouncements

       In June 1998, the Financial  Accounting  Standards Board issued Statement
of  Financial   Accounting   Standards  No.  133,   "Accounting  for  Derivative
Instruments and Hedging Activities." This statement requires companies to record
derivatives  on the balance  sheet as assets and  liabilities,  measured at fair
value.  Gains  and  losses  resulting  from  changes  in  the  values  of  those
derivatives  would be accounted for depending on the use of the  derivative  and
whether it qualifies  for hedge  accounting.  This  statement is not expected to
have a material impact on the Company's consolidated financial statements.  This
statement is  effective  for fiscal years  beginning  after June 15, 1999,  with
earlier  adoption  encouraged.  ENSCO  will adopt this  accounting  standard  as
required by January 1, 2000.

Item 7A. Quantitative and Qualitative Disclosures About Market Risk

       Information   required  under  Item  7A.  has  been   incorporated   into
Management's  Discussion  and  Analysis of  Financial  Condition  and Results of
Operations - Market Risk.





                                       23
<PAGE>




Item 8. Financial Statements and Supplementary Data

                              REPORT OF MANAGEMENT
                              --------------------

       The management of ENSCO  International  Incorporated and its subsidiaries
has  responsibility  for  the  preparation,  integrity  and  reliability  of the
consolidated financial statements and related financial information contained in
this report.

       The  consolidated  financial  statements have been prepared in conformity
with generally accepted  accounting  principles and prevailing  practices of the
industries in which the Company  operates.  In some  instances,  these financial
statements  include  amounts that are based on  management's  best estimates and
judgments.

       The Company  maintains a system of procedures and controls over financial
reporting  that is designed to provide  reasonable  assurance  to the  Company's
management  and Board of  Directors  regarding  the  integrity  and the fair and
reliable  preparation  and  presentation,  in  all  material  respects,  of  its
published financial statements. This system of financial controls and procedures
is reviewed,  modified, and improved as changes occur in business conditions and
operations,  and as a result of suggestions  from the  independent  accountants.
There are inherent  limitations in the  effectiveness  of any system of internal
control  and even an  effective  system of internal  control  can  provide  only
reasonable assurance with respect to the financial statement preparation and may
vary over time. Management believes that, as of December 31, 1998, the Company's
internal  control system provides  reasonable  assurance that material errors or
irregularities  will be prevented or detected within a timely period and is cost
effective.

       As part of  management's  responsibility  for monitoring  compliance with
established  policies and  procedures,  it relies on, among other things,  audit
procedures  performed by corporate auditors and independent  accountants to give
assurance that  established  policies and procedures are adhered to in all areas
subject to their  audits.  The Board of Directors,  operating  through its Audit
Committee  composed  solely  of  outside  directors,   meets  periodically  with
management and the independent  accountants for the purpose of monitoring  their
activities to ensure that each is properly discharging its responsibilities. The
Audit  Committee and independent  accountants  have  unrestricted  access to one
another to discuss their findings.


                       REPORT OF INDEPENDENT ACCOUNTANTS
                       ---------------------------------

To the Board of Directors and Stockholders of ENSCO International Incorporated

       In our  opinion,  the  accompanying  consolidated  balance  sheet and the
related  consolidated  statements of income and of cash flows present fairly, in
all  material   respects,   the  financial   position  of  ENSCO   International
Incorporated and its subsidiaries at December 31, 1998 and 1997, and the results
of their  operations  and their  cash  flows for each of the three  years in the
period ended December 31, 1998, in conformity with generally accepted accounting
principles.  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 of these statements in
accordance with generally accepted auditing standards which 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,  assessing the accounting  principles used and significant estimates
made by management, and evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for the opinion  expressed
above.

/s/  PricewaterhouseCoopers LLP

Dallas, Texas
January 25, 1999



                                       24
<PAGE>



               ENSCO INTERNATIONAL INCORPORATED AND SUBSIDIARIES
                        CONSOLIDATED STATEMENT OF INCOME
                    (in millions, except per share amounts)


                                                       Year Ended December 31,
                                                      -------------------------
                                                       1998      1997     1996
                                                      ------    ------   ------
REVENUES
     Contract drilling .............................. $733.5    $720.9   $408.6 
     Marine transportation ..........................   79.7      94.2     60.2 
                                                      ------    ------   ------
                                                       813.2     815.1    468.8 
                                                      ------    ------   ------ 

OPERATING EXPENSES
     Contract drilling ..............................  287.7     269.5    198.8 
     Marine transportation ..........................   41.4      37.2     28.5 
     Depreciation and amortization ..................   83.5     104.8     81.8 
     General and administrative .....................   15.4      14.3     11.0 
                                                      ------    ------   ------
                                                       428.0     425.8    320.1 
                                                      ------    ------   ------ 

OPERATING INCOME ....................................  385.2     389.3    148.7 
                                                      ------    ------   ------

OTHER INCOME (EXPENSE)
     Interest income ................................   15.1       7.4      4.5 
     Interest expense, net ..........................  (26.2)    (21.4)   (20.8)
     Other, net .....................................    8.4        .5     10.3 
                                                      ------    ------   ------
                                                        (2.7)    (13.5)    (6.0)
                                                      ------    ------   ------ 

INCOME BEFORE INCOME TAXES AND MINORITY INTEREST.....  382.5     375.8    142.7 

PROVISION FOR INCOME TAXES
     Current income taxes ...........................   73.2      82.1      5.4 
     Deferred income taxes ..........................   50.6      55.7     38.6 
                                                      ------    ------   ------
                                                       123.8     137.8     44.0 
MINORITY INTEREST ...................................    4.8       3.1      3.3 
                                                      ------    ------   ------

INCOME BEFORE EXTRAORDINARY ITEM ....................  253.9     234.9     95.4 

EXTRAORDINARY ITEM - EXTINGUISHMENT OF DEBT .........     --      (1.0)      -- 
                                                      ------    ------   ------

NET INCOME .......................................... $253.9    $233.9   $ 95.4 
                                                      ======    ======   ======

BASIC EARNINGS PER SHARE
     Income before extraordinary item ............... $ 1.82   $  1.67   $  .73 
     Extraordinary item .............................     --      (.01)      -- 
                                                      ------    ------   ------
     Net income ..................................... $ 1.82    $ 1.66   $  .73 
                                                      ======    ======   ======

DILUTED EARNINGS PER SHARE
     Income before extraordinary item ............... $ 1.81    $ 1.64   $  .72 
     Extraordinary item .............................     --      (.01)      -- 
                                                      ------    ------   ------
     Net income ..................................... $ 1.81    $ 1.64   $  .72 
                                                      ======    ======   ======

WEIGHTED AVERAGE COMMON SHARES OUTSTANDING
     Basic ..........................................  139.6     141.0    131.5 
     Diluted ........................................  140.6     142.9    133.1 

CASH DIVIDENDS PER COMMON SHARE ..................... $  .10    $  .05   $   -- 
                                                      ======    ======   ======

  The accompanying notes are an integral part of these financial statements.



                                       25
<PAGE>


         
                            ENSCO INTERNATIONAL INCORPORATED AND SUBSIDIARIES
                                         CONSOLIDATED BALANCE SHEET
                                  (in millions, except par value amounts)
<TABLE>
<CAPTION>
                                                                                     December 31,
                                                                                ----------------------
                                                                                  1998          1997
                                                                                --------      --------
                                                   ASSETS
     <S>                                                                        <C>           <C>      
     CURRENT ASSETS

        Cash and cash equivalents .........................................     $  330.1      $  262.2 
        Accounts receivable, net ..........................................        118.4         157.2 
        Prepaid expenses and other ........................................         27.8          27.7 
                                                                                --------      --------
            Total current assets ..........................................        476.3         447.1 
                                                                                --------      --------

     PROPERTY AND EQUIPMENT, AT COST ......................................      1,799.2       1,534.1 
        Less accumulated depreciation .....................................        409.8         357.0 
                                                                                --------      --------
            Property and equipment, net ...................................      1,389.4       1,177.1 
                                                                                --------      --------

     OTHER ASSETS, NET ....................................................        127.1         147.8 
                                                                                --------      --------
                                                                                $1,992.8      $1,772.0
                                                                                ========      ========

                                    LIABILITIES AND STOCKHOLDERS' EQUITY

     CURRENT LIABILITIES
        Accounts payable ....................................................   $    9.1      $    7.8 
        Accrued liabilities .................................................      126.7          93.8 
        Current maturities of long-term debt ................................       23.6          29.3 
                                                                                --------      --------
            Total current liabilities .......................................      159.4         130.9 
                                                                                --------      --------

     LONG-TERM DEBT .........................................................      375.5         400.8 

     DEFERRED INCOME TAXES ..................................................      180.0         128.2 

     OTHER LIABILITIES ......................................................       17.1          24.4 

     MINORITY INTEREST ......................................................       15.8          11.0 

     COMMITMENTS AND CONTINGENCIES ..........................................

     STOCKHOLDERS' EQUITY
        First preferred stock, $1 par value, 5.0 million shares
            authorized, none issued .........................................         --            -- 
        Preferred stock, $1 par value, 15.0 million shares authorized,
            none issued .....................................................         --            -- 
        Common stock, $.10 par value, 250.0 million shares authorized,
            155.6 million and 155.2 million shares issued ...................       15.6          15.5 
        Additional paid-in capital ..........................................      846.1         841.3 
        Retained earnings ...................................................      538.4         298.6 
        Restricted stock (unearned compensation) ............................       (7.7)         (6.8)
        Cumulative translation adjustment ...................................       (1.1)         (1.1)
        Treasury stock, at cost, 18.5 million and 13.0 million shares .......     (146.3)        (70.8)
                                                                                --------      --------
               Total stockholders' equity ...................................    1,245.0       1,076.7 
                                                                                --------      --------
                                                                                $1,992.8      $1,772.0 
                                                                                ========      ======== 
</TABLE>

      The accompanying notes are an integral part of these financial statements.



                                       26
<PAGE>




                       ENSCO INTERNATIONAL INCORPORATED AND SUBSIDIARIES
                              CONSOLIDATED STATEMENT OF CASH FLOWS
                                          (in millions)
<TABLE>
<CAPTION>
                                                                              Year Ended December 31,
                                                                        ----------------------------------
                                                                         1998          1997          1996
                                                                        -----         ------        ------
<S>                                                                     <C>           <C>           <C>      
OPERATING ACTIVITIES

     Net income ..................................................      $253.9        $233.9        $ 95.4
     Adjustments to reconcile net income to net cash provided
       by operating activities:
         Depreciation and amortization ...........................        83.5         104.8          81.8
         Deferred income tax provision ...........................        50.6          55.7          38.6
         Amortization of other assets ............................        10.1           8.6           4.4
         Gain on asset dispositions ..............................       (10.6)         (1.6)         (1.8)
         Other ...................................................         4.5            .9           1.4
         Changes in operating assets and liabilities:
            (Increase) decrease in accounts receivable ...........        38.8         (46.7)        (28.6)
            (Increase) decrease in prepaid expenses and other ....         1.0         (33.3)          1.0
            Increase (decrease) in accounts payable ..............         1.3          (9.1)           .9
            Increase in accrued and other liabilities ............        15.6          23.4           5.5
                                                                        ------        ------        ------
               Net cash provided by operating activities .........       448.7         336.6         198.6
                                                                        ------        ------        ------

INVESTING ACTIVITIES
     Additions to property and equipment .........................      (330.8)       (282.3)       (176.0)
     Net proceeds from disposition of assets .....................        68.4           2.1           5.3
     Net cash acquired in Dual acquisition .......................          --            --           8.5
     Net proceeds from sales of discontinued operations ..........          --            --           5.1
     Sale of short-term investments, net .........................          --            --           5.0
     Other .......................................................          --            .6           2.0
                                                                        ------        ------        ------
               Net cash used by investing activities .............      (262.4)       (279.6)       (150.1)
                                                                        ------        ------        ------

FINANCING ACTIVITIES
     Long-term borrowings ........................................          --            --          59.0
     Reduction of long-term borrowings ...........................       (30.6)       (160.0)        (85.4)
     Net proceeds from public debt offering ......................          --         287.8            -- 
     Pre-acquisition purchase of Dual debt .......................          --            --         (18.1)
     Repurchase of common stock ..................................       (74.2)           --            -- 
     Cash dividends paid .........................................       (14.1)         (7.1)           -- 
     Tax benefit from stock compensation .........................          .6           5.2            -- 
     Reduction in restricted cash ................................          --           1.6            -- 
     Other .......................................................         (.1)         (3.0)          (.4)
                                                                        ------        ------        ------
               Net cash provided (used) by financing activities ..      (118.4)        124.5         (44.9)
                                                                        ------        ------        ------

INCREASE IN CASH AND CASH EQUIVALENTS ............................        67.9         181.5           3.6

CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR .....................       262.2          80.7          77.1
                                                                        ------        ------        ------

CASH AND CASH EQUIVALENTS, END OF YEAR ...........................      $330.1        $262.2        $ 80.7
                                                                        ======        ======        ======

    The accompanying notes are an integral part of these financial statements.
</TABLE>



                                       27
<PAGE>




               ENSCO INTERNATIONAL INCORPORATED AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



1.  DESCRIPTION OF THE BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

    Organization and Business

       ENSCO  International  Incorporated  (the "Company") is one of the leading
international  providers of offshore drilling and marine transportation services
to the  oil  and  gas  industry.  All  of the  Company's  domestic  and  foreign
operations are conducted through wholly owned  subsidiaries,  with the exception
of the  Company's  Venezuelan  operations  in  which  the  Company  holds an 85%
interest and a locally owned private company owns the remaining 15%.

       The Company's operations are integral to the exploration, development and
production  of  oil  and  gas.   Business  levels  for  the  Company,   and  its
corresponding   operating  results,  are  significantly  affected  by  worldwide
expenditures  for oil and gas  drilling.  Expenditures  for oil and gas drilling
activity fluctuate based upon many factors, including world economic conditions,
the legislative  environment in the U.S. and other major  countries,  production
levels and other  activities  of OPEC and other oil and gas  producers,  and the
impact  that these and other  events have on the  current  and  expected  future
pricing of oil and natural gas. See Note 9 "Segment  Information" for additional
information  concerning  the  Company's  operations  by segment  and  geographic
region.

    Principles of Consolidation

       The accompanying  consolidated  financial statements include the accounts
of the Company and its majority owned subsidiaries. All significant intercompany
accounts and transactions have been eliminated.

    Pervasiveness of Estimates

       The  preparation  of financial  statements in conformity  with  generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions  that affect the  reported  amounts of assets and  liabilities,  the
related revenues and expenses,  and disclosure of gain and loss contingencies at
the date of the  financial  statements.  Actual  results could differ from those
estimates.

    Cash Equivalents

       The  Company   considers  all  highly  liquid   investments  to  be  cash
equivalents  if they  have  maturities  of three  months  or less at the date of
purchase.

    Foreign Currency Translation

       The  U.S.  dollar  is the  functional  currency  of all of the  Company's
foreign  subsidiaries.  The  financial  statements of foreign  subsidiaries  are
remeasured in U.S. dollars based on a combination of both current and historical
exchange rates. Gains and losses caused by the remeasurement  process applicable
to foreign  subsidiaries are reflected in the consolidated  statement of income.
Translation gains and losses were  insignificant for all years in the three year
period ended  December 31, 1998.  In prior years,  the  financial  statements of
certain  foreign  subsidiaries  were  maintained in the local foreign  currency.
Foreign currency translation adjustments for those subsidiaries were accumulated
as a separate component of equity.




                                       28
<PAGE>


    Property and Equipment

       Depreciation  on drilling rigs and related  equipment and marine  vessels
acquired  after 1990 is computed  using the straight line method over  estimated
useful  lives  ranging  from 4 to 22 years.  Depreciation  on drilling  rigs and
related  equipment and marine  vessels  acquired prior to 1991 is computed using
the units-of-production method over estimated useful lives ranging from 12 to 24
years.  Under  the  units-of-production  method,  depreciation  is  based on the
utilization  of the drilling rigs and vessels with a minimum  provision when the
rigs or vessels are idle. Depreciation for other equipment and for buildings and
improvements  is computed using the straight line method over  estimated  useful
lives ranging from 2 to 6 years and 2 to 30 years, respectively.

       During the latter part of 1997, the Company  performed an engineering and
economic  study of the  Company's  asset base.  As a result of this  study,  the
Company,  effective  January  1, 1998,  extended  the  depreciable  lives of its
drilling rigs and marine vessels by an average of five to six years. The Company
believes  that this  change  provides  a better  matching  of the  revenues  and
expenses of the Company's assets over their anticipated useful lives. The effect
of this change on the Company's  financial  results for the year ended  December
31, 1998 was to reduce  depreciation  expense by approximately  $35.2 million or
$.25 per basic and diluted share.

       Maintenance  and repair costs are charged to expense as  incurred.  Major
renewals and  improvements  are  capitalized.  Upon retirement or replacement of
assets,  the related  cost and  accumulated  depreciation  are removed  from the
accounts and the resulting gain or loss is included in income.

    Goodwill

       Goodwill  arising from  acquisitions  is  amortized on the  straight-line
basis over  periods  ranging from 10 to 40 years.  Amortization  of goodwill was
$3.3  million,  $3.1 million and $1.7  million for the years ended  December 31,
1998, 1997 and 1996,  respectively.  Goodwill, net of accumulated  amortization,
was  $113.4   million  and  $116.7  million  at  December  31,  1998  and  1997,
respectively,  and is included in Other Assets, Net. Accumulated amortization of
goodwill at  December  31,  1998 and 1997 was $10.6  million  and $7.3  million,
respectively.

    Impairment of Assets

       The  Company  evaluates  the  carrying  value of its  long-lived  assets,
consisting  primarily of property and  equipment  and  goodwill,  when events or
changes in circumstances  indicate that the carrying value of such assets may be
impaired.  The  determination  of  impairment  is  based  upon  expectations  of
undiscounted future cash flows, before interest, of the related asset.

    Revenue Recognition

       The Company's  drilling and marine services  contracts  generally provide
for payment on a day rate basis,  and  revenues  are  recognized  as the work is
performed.

    Income Taxes

       Deferred tax assets and  liabilities  are recognized for the  anticipated
future tax effects of  temporary  differences  between the  financial  statement
basis  and the tax  basis of the  Company's  assets  and  liabilities  using the
enacted tax rates in effect at year end. A valuation  allowance for deferred tax
assets is recorded  when it is more  likely  than not that the benefit  from the
deferred tax asset will not be realized.

    Minority Interest

       The Company's Venezuelan  operations are conducted through ENSCO Drilling
(Caribbean),  Inc.  ("Caribbean"),  in  which  the  Company  owns an 85%  equity
interest.  Minority  interest  expense for the three  years in the period  ended
December 31, 1998  reflects the minority  shareholder's  15% equity  interest in
Caribbean. The minority shareholder is also entitled to an additional 15% of the
net proceeds from any future sale of rigs currently owned by Caribbean.

                                       29
<PAGE>

    Stock-Based Employee Compensation

       The Company uses the intrinsic  value method of  accounting  for employee
stock-based  compensation in accordance with Accounting Principles Board Opinion
No. 25,  "Accounting  for Stock Issued to Employees."  Under the intrinsic value
method,  if the exercise price of the Company's  stock options equals the market
value of the underlying  stock on the date of grant, no compensation  expense is
recognized.  See Note 6 "Employee Benefit Plans" for the required  disclosure of
pro forma  information  regarding  net income and  earnings  per share as if the
Company had accounted for its employee stock options under the fair value method
of Statement of Financial Accounting Standards ("SFAS") No. 123, "Accounting for
Stock-Based Compensation."

    Earnings Per Share

       For each of the three years in the period  ended  December 31, 1998 there
were no adjustments to net income for purposes of calculating  basic and diluted
earnings per share.  The following is a  reconciliation  of the weighted average
common shares used in the basic and diluted earnings per share  computations (in
millions):

                                                         Year Ended December 31,
                                                         -----------------------
                                                          1998     1997    1996 
                                                         ------   ------  ------

Weighted average common shares outstanding (basic) ....   139.6    141.0   131.5
Potentially dilutive common shares:
    Restricted stock grants ............................     .3       .5      .5
    Stock options ......................................     .7      1.4     1.1
                                                          -----    -----   -----
Weighted average common shares outstanding (diluted) ...  140.6    142.9   133.1
                                                          =====    =====   =====

       All  earnings  per share  amounts  and  weighted  average  common  shares
outstanding  have been  adjusted  to  reflect  the  two-for-one  stock  split on
September 15, 1997. See Note 5 "Stockholders' Equity."

    Comprehensive Income

       Effective  January 1, 1998, the Company adopted SFAS No. 130,  "Reporting
Comprehensive  Income."  The  adoption  of this  statement  had no effect on the
Company's financial statements.

    Reclassifications

       Certain previously  reported amounts have been reclassified to conform to
the 1998 presentation.

2.  ACQUISITION OF DUAL DRILLING COMPANY ("DUAL")

       On June 12, 1996, the Company  acquired Dual pursuant to an Agreement and
Plan of Merger among the Company,  a wholly owned  subsidiary of the Company and
Dual.  The  acquisition  was  approved  on that  date by Dual  stockholders  who
received 0.625 shares (1.25 shares giving effect to the two-for-one  stock split
effective  September 15, 1997) of the  Company's  common stock for each share of
Dual common stock.  The Company issued  approximately  10.1 million shares (20.1
million  shares  post  split)  of its  common  stock  to  Dual  stockholders  in
connection  with  the  acquisition,   resulting  in  an  acquisition   price  of
approximately $218.4 million.

       The  acquisition  of  Dual  was  accounted  for  as a  purchase  and  the
acquisition  cost was allocated to the assets acquired and  liabilities  assumed
based on estimates of their  respective fair values.  The excess of the purchase
price over net assets  acquired of $114.3  million was allocated to goodwill and
is being amortized over 40 years. The Company completed its final purchase price
allocation and  determination of goodwill,  deferred taxes and other accounts in
the second quarter of 1997.



                                       30
<PAGE>


       The following  unaudited  pro forma  information  shows the  consolidated
results  of  operations  for  the  year  ended  December  31,  1996  based  upon
adjustments  to the  historical  financial  statements  of the  Company  and the
historical financial statements of Dual to give effect to the acquisition by the
Company as if such acquisition had occurred January 1, 1996 (in millions, except
per share data):

                                                             1996  
                                                            ------
    Operating revenues ...........................          $522.4 
    Operating income .............................           149.6 
    Income from continuing operations ............            91.7 
    Net income ...................................            91.7 

    Basic earnings per share .....................          $  .65 
    Diluted earnings per share ...................             .65 

       The pro forma  consolidated  results of  operations  are not  necessarily
indicative of the actual  results that would have  occurred had the  acquisition
been effective on January 1, 1996, or of results that may occur in the future.

3.  PROPERTY AND EQUIPMENT

       Property  and  equipment  at December  31, 1998 and 1997  consists of the
following (in millions):

                                                        1998            1997   
                                                      --------        --------

       Drilling rigs and equipment ...............    $1,522.3        $1,371.2
       Marine vessels ............................        87.7            86.5
       Other .....................................        25.8            20.8
       Work in progress ..........................       163.4            55.6
                                                      --------        --------
                                                      $1,799.2        $1,534.1
                                                      ========        ========

       In September  1998, one of the Company's large anchor handling tug supply
vessels, the Kodiak II, sank while supporting drilling operations for a customer
in the Gulf of Mexico.  The Company received insurance proceeds of $21.0 million
on the loss of the  vessel,  resulting  in a financial  statement  gain of $10.0
million ($6.5 million or $.05 per basic and diluted share net of tax).  The gain
represents the insurance proceeds in excess of the retired net book value of the
vessel and is  recorded  in "Other,  net" under Other  Income  (Expense)  in the
Consolidated Statement of Income for the year ended December 31, 1998.

       In October  1998,  the Company sold to  Petroleos de Venezuela  ("PDVSA")
four barge  drilling rigs whose  contracts  expired in 1998 for cash proceeds of
$49.4  million.  The  drilling  contracts  between the Company and PDVSA,  which
expired in 1998,  contained an option for PDVSA to purchase these four rigs. The
Company and PDVSA are in dispute concerning additional consideration the Company
believes  it  is  entitled  to  receive   under  the  charter   agreement,   for
reimbursement  of taxes,  liabilities and costs related to the sale. The parties
have yet to agree on the  amount  and  method  of  calculating  such  additional
payment.  In  connection  with the sale,  the  Company  and PDVSA have agreed to
reserve their rights for resolution of these contractual disputes. Based on cash
proceeds  received from the sale, an  insignificant  gain has been recognized on
the transaction  after considering taxes and required payment of $4.8 million to
ENSCO's minority interest holder.  Any additional  proceeds  collected in future
periods will be recognized as income when received.

       In May 1997,  the  Company  acquired  the  remaining  51%  interest  in a
jointly-owned  premium  jackup rig located in Southeast  Asia for  approximately
$21.7  million.  The  Company's  49%  interest in the jackup rig was  previously
acquired in the acquisition of Dual.

       In December  1997,  the Company  purchased a harsh  environment,  Gorilla
class,  jackup  drilling rig and certain  related  equipment  for  approximately
$103.2 million. The drilling rig was renamed the ENSCO 100 and is under bareboat
charter to Smedvig asa, the seller of the rig, until the year 2000.


                                       31
<PAGE>

       The  Company's  additions to property and  equipment  for the years ended
December  31,  1998 and 1997  include  approximately  $162.9  million and $137.2
million,  respectively,  in connection with major modifications and enhancements
of rigs and vessels.  During 1998, the Company began  construction  on three new
barge rigs, a harsh environment  jackup rig and a semisubmersible  drilling rig.
Capital additions for these projects were approximately $136.9 million in 1998.

4.  LONG-TERM DEBT

       Long-term  debt at December 31, 1998 and 1997  consists of the  following
(in millions):

                                                               1998       1997 
                                                              ------     ------
     6.75% Notes due 2007 ..................................  $149.1     $149.0 
     7.20% Debentures due 2027 .............................   148.1      148.1 
     9.875% Senior Subordinated Notes due 2004 .............    74.2       74.7 
     Secured term loans (non-recourse to the Company) ......    19.6       44.6 
     Secured term loans ....................................     8.1       13.7 
                                                              ------     ------
                                                               399.1      430.1 
     Less current maturities ...............................   (23.6)     (29.3)
                                                              ------     ------
     Total long-term debt ..................................  $375.5     $400.8 
                                                              ======     ======

    Revolving Credit Agreement

       In May  1998,  the  Company  entered  into  a  $185.0  million  unsecured
revolving credit  agreement (the "Credit  Agreement") with a syndicate of banks.
Interest on amounts  borrowed under the Credit Agreement are based on LIBOR plus
an applicable  margin rate  (currently  .4%)  depending on the Company's  credit
rating. The Company also pays a commitment fee (currently .15% per annum) on the
undrawn  portion  of the  available  credit  line,  which  is also  based on the
Company's credit rating.  The Company is required to maintain certain  financial
covenants  under the  Credit  Agreement  which  include  the  Company  meeting a
specified level of interest coverage, assets to indebtedness, leverage ratio and
tangible  net worth.  As of December 31,  1998,  the Company had $185.0  million
available  for  borrowings  under the Credit  Agreement.  The  Credit  Agreement
matures in May 2003.

    Notes due 2007 and Debentures due 2027

       In  November 1997, the Company issued $300.0 million of unsecured debt in
a public offering, consisting of $150.0  million of 6.75% Notes due November 15,
2007 (the "Notes") and $150.0 million of 7.20%  Debentures due November 15, 2027
(the  "Debentures").  Interest  on the  Notes  and  the  Debentures  is  payable
semiannually on May 15 and November 15. The Notes and the Debentures were issued
pursuant to a $500.0 million universal shelf  registration  statement filed with
the  Securities  and Exchange  Commission in October 1997. The net proceeds from
the offering totaled approximately $287.8 million after selling and underwriting
discounts  and the  settlement  of interest  rate  hedges.  Approximately  $75.0
million of the net proceeds were used to retire the Company's  revolving  credit
facility in November  1997 and $103.2  million of the net proceeds  were used to
acquire a harsh  environment,  Gorilla  class,  jackup rig in December 1997. The
company recorded an extraordinary  charge of $1.0 million,  net of income taxes,
upon retirement of the revolving credit facility.

       The Notes and Debentures may be redeemed at any time at the option of the
Company,  in whole or in part, at a price equal to 100% of the principal  amount
thereof plus accrued and unpaid interest,  if any, and a make-whole premium. The
indenture  under  which  the  Notes  and the  Debentures  were  issued  contains
limitations on the  incurrence of  indebtedness  secured by certain  liens,  and
limitations  on  engaging  in certain  sale/leaseback  transactions  and certain
merger, consolidation or reorganization  transactions.  The Notes and Debentures
are not subject to any sinking fund requirements.

                                       32
<PAGE>

    Senior Subordinated Notes due 2004

       At the June 12,  1996  acquisition  date,  Dual  had  outstanding  $100.0
million (face amount) of 9.875%  Senior  Subordinated  Notes due 2004 (the "Dual
Notes").  In July  1996,  $5.0  million  (face  amount)  of the Dual  Notes were
redeemed  pursuant  to an  offer  required  to be made  under  the  terms of the
indenture.  Additionally,  the Company  purchased $23.2 million (face amount) of
the Dual Notes on the open market  during  1996.  At December 31, 1998 and 1997,
the carrying value of the Dual Notes in the Consolidated Financial Statements is
net of the amounts  redeemed  and  purchased  by the  Company,  and includes the
unamortized  premium  assigned  to  the  Dual  Notes  as a  result  of  purchase
accounting.  The Dual Notes are  unsecured  obligations  and are  guaranteed  by
certain of the former  Dual  subsidiaries.  The Dual Notes'  indenture  contains
certain restrictive covenants relating to debt, restricted payments, disposition
of proceeds of asset sales,  transactions  with  affiliates,  limitation  on the
payment  of  dividends  and  other  payment  restrictions,  limitations on sale/
leaseback transactions and restrictions on mergers,  consolidations and transfer
of assets. Interest on the Dual Notes is payable semiannually and the Dual Notes
are redeemable at the option of the Company, in whole or in part, at any time on
or after January 15, 1999.  The Dual Notes are redeemable  at prices  decreasing
annually  from 104.94% of the face amount on January 15, 1999, to par on January
15, 2002 and thereafter.

    Secured term loans (non-recourse to the Company)

       During  1993 and 1994,  a  subsidiary  of the  Company  entered  into two
financing  arrangements,  in  an  original  principal  amount  totalling  $143.0
million,  with a subsidiary of a Japanese  corporation  in  connection  with the
construction of eight barge rigs that were delivered to Venezuela. The financing
arrangements  consisted of eight secured term loans, one for each barge rig. The
eight  secured  term  loans  had an  average  fixed  rate of 8.17% and were each
repayable in 60 equal monthly  installments  of principal and interest ending in
April 1998 through January 2000. During 1998, four of these term loans were paid
in full and the  remaining  four term loans were  repaid on  February 5, 1999 in
connection  with the early  termination of the four barge drilling rig contracts
with PDVSA.

    Secured term loans

       In October 1993, the Company  entered into a $25.0 million loan agreement
with a financial institution. The seven year secured term loan bears interest at
a fixed rate of 7.91% per annum,  repayable in 28 equal  quarterly  installments
ending October 2000. In September  1998, the Company repaid  approximately  $1.3
million of outstanding  debt under the loan agreement,  in addition to scheduled
maturities,  representing the outstanding  portion of the debt related to Kodiak
II which sank in September 1998. The term loan is  collateralized  by certain of
the Company's marine transportation  vessels which had a combined net book value
of $35.5  million at December 31, 1998.  The loan  agreement  requires  that the
Company maintain a specified minimum tangible net worth and that the Company not
exceed a certain ratio of liabilities to tangible net worth.

       In December 1995, in connection  with the purchase of four supply vessels
that were  previously  leased,  the Company  entered  into a $4.7  million  loan
agreement  with the seller.  The five year secured term loan bears interest at a
fixed  rate of 7.75% per annum,  repayable  in 20 equal  quarterly  installments
ending December 2000. The term loan is collateralized by the four supply vessels
purchased  which had a combined  net book value of $3.5  million at December 31,
1998.

    Maturities

       Maturities  of  long-term  debt,  excluding  amortization  of discount or
premium,  are as follows:  $23.6 million in 1999,  $4.1 million in 2000, none in
2001 through 2003 and $371.4 million thereafter.

5.  STOCKHOLDERS' EQUITY

       In May 1998, the Company's  Board of Directors  authorized the repurchase
of up to 5.0 million  shares of the Company's  common  stock.  In the second and
third quarters of 1998, the Company  repurchased  5.0 million shares of treasury
stock at a cost of approximately  $69.6 million.  In November 1998, the Board of
Directors  approved an extension of the stock repurchase  program and authorized
the Company to repurchase an additional  5.0 million shares of its common stock.
In December 1998,  the Company  repurchased an additional .5 million shares at a
cost of approximately $4.6 million.

       At the Company's  annual  meeting of  stockholders  on May 13, 1997,  the
stockholders  approved an increase in the Company's  authorized shares of common
stock from 125.0 million shares to 250.0 million shares.


                                       33
<PAGE>


       In August 1997, the Company's  Board of Directors  approved a two-for-one
stock  split  of the  Company's  common  stock  effective  September  15,  1997.
Accordingly,  all references to weighted  average common shares  outstanding and
earnings per share amounts in the financial  statements  and footnotes have been
adjusted to reflect the two-for-one stock split.

       A summary of activity in the various  stockholders'  equity  accounts for
each of the three  years in the period  ended  December  31,  1998 is as follows
(shares in thousands, dollars in millions):

<TABLE>
<CAPTION>

                                                                                                  Restricted
                                                 Common Stock        Additional     Retained         Stock        
                                              ------------------       Paid-In      Earnings       (Unearned       Treasury
                                              Shares      Amount       Capital      (Deficit)    Compensation)       Stock
                                              ------      ------       -------      ---------    -------------     --------
<S>                                           <C>        <C>            <C>          <C>           <C>              <C>         
BALANCE, December 31, 1995                    66,891      $  6.7        $615.6        $(23.6)      $  (5.3)         $(61.1)
     Net income                                   --          --            --          95.4            --              --   
     Common stock issued under
      employee and director incentive
      plans, net                                 215          --           2.4            --           (.7)           (1.9)
     Common stock issued in Dual
      acquisition                             10,069         1.0         217.4            --            --              -- 
     Amortization of unearned
      stock compensation                          --          --            --            --           1.1              --
                                             -------      ------        ------        ------       -------         -------
BALANCE, December 31, 1996                    77,175         7.7         835.4          71.8          (4.9)          (63.0)
     Net income                                   --          --            --         233.9            --              --  
     Cash dividends paid                          --          --            --          (7.1)           --              --
     Common stock issued under
      employee and director incentive
      plans, net                                 505          .1           8.4            --          (3.1)           (7.8)
     Amortization of unearned
      stock compensation                          --          --            --            --           1.2              -- 
     Tax benefit from stock 
      compensation                                --          --           5.2            --            --              --
     Two-for-one stock split                  77,494         7.7          (7.7)           --            --              --
                                             -------      ------        ------        ------       -------         -------      
BALANCE, December 31, 1997                   155,174        15.5         841.3         298.6          (6.8)          (70.8)
     Net income                                   --          --            --         253.9            --              --
     Cash dividends paid                          --          --            --         (14.1)           --              -- 
     Common stock issued under                                                                                 
      employee and director 
      incentive plans, net                       402          .1           4.2            --          (2.3)           (1.3)
     Repurchase of common stock                   --          --            --            --            --           (74.2)
     Amortization of unearned
      stock compensation                          --          --            --            --           1.4              --
     Tax benefit from stock
      compensation                                --          --            .6            --            --              -- 
                                             -------      ------        ------        ------       -------         ------- 
BALANCE, December 31, 1998                   155,576      $ 15.6        $846.1        $538.4       $  (7.7)        $(146.3)
                                             =======      ======        ======        ======       =======         =======
</TABLE>


       At December 31, 1998 and 1997,  the  outstanding  shares of the Company's
common stock,  net of treasury  shares,  were 137.0  million and 142.2  million,
respectively.



                                       34
<PAGE>

       On February  21, 1995,  the Board of  Directors of the Company  adopted a
shareholder  rights plan and declared a dividend of one preferred share purchase
right (a "Right") for each share of the Company's  common stock  outstanding  on
March 6, 1995. Each Right initially entitled its holder to purchase 1/100th of a
share of the Company's Series A Junior Participating Preferred Stock for $50.00,
subject to  adjustment.  In March 1997,  the plan was  amended to  increase  the
purchase  price from $50.00 to  $250.00.  The Rights  generally  will not become
exercisable until 10 days after a public announcement that a person or group has
acquired  15% or  more  of the  Company's  common  stock  (thereby  becoming  an
"Acquiring  Person")  or the  commencement  of a tender or  exchange  offer upon
consummation  of  which  such  person  or  group  would  own  15% or more of the
Company's common stock (the earlier of such dates being called the "Distribution
Date").  Rights will be issued  with all shares of the  Company's  common  stock
issued from March 6, 1995 to the Distribution Date. Until the Distribution Date,
the Rights will be  evidenced by the  certificates  representing  the  Company's
common stock and will be transferrable  only with the Company's common stock. If
any person or group becomes an Acquiring Person,  each Right,  other than Rights
beneficially  owned by the Acquiring  Person (which will thereupon become void),
will  thereafter  entitle its holder to  purchase,  at the Rights'  then current
exercise  price,  shares of the Company's  common stock having a market value of
two times  the  exercise  price of the  Right.  If,  after a person or group has
become  an  Acquiring  Person,  the  Company  is  acquired  in a merger or other
business  combination  transaction or 50% or more of its assets or earning power
are sold, each Right (other than Rights owned by an Acquiring  Person which will
have become  void) will  entitle  its holder to  purchase,  at the Rights'  then
current exercise price, that number of shares of common stock of the person with
whom the Company has engaged in the foregoing  transaction (or its parent) which
at the time of such  transaction  will  have a market  value  of two  times  the
exercise  price of the Right.  After any person or group has become an Acquiring
Person,  the Company's  Board of Directors  may,  under  certain  circumstances,
exchange  each Right (other than Rights of the  Acquiring  Person) for shares of
the Company's  common stock having a value equal to the  difference  between the
market  value of the  shares  of the  Company's  common  stock  receivable  upon
exercise of the Right and the  exercise  price of the Right.  The  Company  will
generally  be entitled to redeem the Rights for $.01 per Right at any time until
10 days after a public  announcement that a 15% position has been acquired.  The
Rights expire on February 21, 2005.

6.  EMPLOYEE BENEFIT PLANS

    Stock Options

       In  May  1998,  the   stockholders   approved  the  ENSCO   International
Incorporated  1998 Incentive Plan (the "1998 Plan").  The 1998 Plan replaced the
Company's  previous stock incentive  plan, the ENSCO  Incentive Plan.  Under the
1998 Plan, a maximum of 11.3 million shares are reserved for issuance as options
and awards of restricted stock. However, no more than 1.13 million shares may be
issued as grants of restricted stock. Stock options generally become exercisable
in 25%  increments  over a  four-year  period and to the  extent not  exercised,
expire on the fifth  anniversary of the date of grant.  Restricted  stock grants
generally vest at the rate of 10% per year.

       In May 1996, the  stockholders  approved the Company's 1996  Non-Employee
Directors  Stock Option Plan  ("Directors  Plan").  Under the Directors  Plan, a
maximum of 600,000 shares are reserved for issuance.  Options  granted under the
Directors Plan become exercisable six months after the date of grant and expire,
if not exercised, five years thereafter.

       The exercise price of stock options under the 1998 Plan and the Directors
Plan is the market value of the stock at the date the option is granted.

       Pro forma  information  regarding  net income and  earnings  per share is
required  by SFAS  No.  123,  and has  been  determined  as if the  Company  had
accounted  for its employee  stock  options  under the fair value method of that
statement. The fair value of each option grant is estimated on the date of grant
using the Black-Scholes option pricing model with the following weighted average
assumptions:

                                             1998        1997       1996
                                            ------      ------     ------
   Risk-free interest rate ..........         5.5%        6.4%       6.3%
   Expected life (in years) .........         4.5         4.0        4.0   
   Expected volatility ..............        38.9%       36.0%      38.7%
   Dividend yield ...................          .5%         --         -- 


                                       35
<PAGE>


       The  following  table  reflects  pro forma net income  and  earnings  per
share  under the fair value  approach  of  SFAS No. 123 (in millions, except per
share amounts):
<TABLE>
<CAPTION>

                                    1998                      1997                      1996
                          -----------------------   -----------------------   -----------------------   
                          As Reported   Pro forma   As Reported   Pro forma   As Reported   Pro forma
                          -----------   ---------   -----------   ---------   -----------   ---------

<S>                          <C>          <C>          <C>          <C>          <C>          <C>   
Net income                   $253.9       $249.6       $233.9       $230.9       $ 95.4       $ 94.3
Basic earnings per share       1.82         1.79         1.66         1.64          .73          .72
Diluted earnings per share     1.81         1.78         1.64         1.62          .72          .71
</TABLE>


       These pro forma amounts may not be representative  of future  disclosures
since the estimated fair value of stock options is amortized to expense over the
vesting period, and additional options may be granted in future years.

       A summary of stock  option  transactions  under the 1998 Plan,  Directors
Plan and the ENSCO Incentive Plan is as follows (shares in thousands):

<TABLE>
<CAPTION>

                                                       1998                   1997                   1996
                                                --------------------    --------------------    --------------------
                                                            Weighted                Weighted                Weighted
                                                            Average                 Average                 Average
                                                            Exercise                Exercise                Exercise
                                                Shares       Price      Shares       Price      Shares       Price
                                                ------      --------    ------      --------    ------      --------     
   <S>                                           <C>         <C>         <C>         <C>         <C>         <C>    
   Outstanding at beginning of year.........     3,105       $17.36      2,301       $ 8.83      2,242       $ 6.66 
           Granted ..........................      125        21.22      1,583        24.74        486        15.51 
           Exercised ........................     (268)        7.10       (721)        6.39       (376)        4.49 
           Forfeited ........................      (40)       19.04        (58)       16.59        (51)        9.34 
                                                ------       ------     ------       ------     ------       ------
   Outstanding at end of year ...............    2,922       $18.44      3,105       $17.36      2,301       $ 8.83 
                                                ======       ======     ======       ======     ======       ======

   Exercisable at end of year ...............    1,307       $15.11        773       $ 9.38        948       $ 6.65 
   Weighted average fair value of
      options granted during the year .......                $ 8.27                  $ 9.34                  $ 6.08 
</TABLE>


       The  following   table   summarizes   information   about  stock  options
outstanding at December 31, 1998 (shares in thousands):

<TABLE>
<CAPTION>

                                      Options Outstanding                                  Options Exercisable
                       -------------------------------------------------------      --------------------------------
                         Number        Weighted Average                               Number
       Range of        Outstanding         Remaining          Weighted Average      Exercisable     Weighted Average
    Exercise Prices    at 12/31/98     Contractual Life        Exercise Price       at 12/31/98      Exercise Price     
    ---------------    -----------     ----------------       ----------------      -----------     ----------------    
      <S>                 <C>                <C>                   <C>                <C>               <C>    
       $ 7 - $ 9            856              1.1 years             $ 8.07               649             $ 8.05 
        12 -  16            281              2.3 years              14.81               143              14.90 
        16 -  20            196              3.5 years              17.21                57              16.76 
        22 -  25          1,520              3.4 years              24.66               415              24.55 
        25 -  32             69              4.0 years              28.48                43              28.98 
                          -----              ---------             ------             -----             ------
       $ 7 - $32          2,922              2.7 years             $18.44             1,307             $15.11 
                          =====              =========             ======             =====             ======
</TABLE>


       At December 31, 1998,  11.1 million  shares were  available  for grant as
options  or  incentive  grants  under  the 1998  Plan and  492,000  shares  were
available for grant as options under the Directors Plan.


                                       36
<PAGE>

    Incentive Stock Grants

       Key  employees,  who are in a position to  contribute  materially  to the
Company's growth and development and to its long-term success,  are eligible for
incentive  stock  grants  under  the 1998  Plan and  previously  under the ENSCO
Incentive Plan.  Shares of common stock subject to incentive grants vest on such
a basis as determined  by a committee of the Board of  Directors.  Through 1998,
incentive  stock grants for 2.7 million shares of common stock were granted,  of
which 1.9 million were vested at December 31, 1998.  During 1998, 1997 and 1996,
incentive  stock grants for 130,000  shares,  100,000  shares and 50,000 shares,
respectively,  were granted.  The remaining  outstanding  incentive stock grants
vest as follows:  212,500 in years 1999 and 2000,  50,500 in years 2001  through
2004, 38,500 in 2005, 28,000 in 2006, 23,000 in 2007 and 13,000 in 2008.

    Savings Plan

       The Company has a profit  sharing plan (the "ENSCO  Savings  Plan") which
covers eligible employees with more than one year of service, as defined. Profit
sharing  contributions require Board of Directors approval and may be in cash or
grants of the  Company's  common  stock.  The Company  recorded  profit  sharing
contribution  provisions for the years ended December 31, 1998, 1997 and 1996 of
$8.9 million, $8.4 million and $3.8 million, respectively.

       The ENSCO  Savings Plan  includes a 401(k)  savings  plan  feature  which
allows  eligible  employees  with more than three  months of service to make tax
deferred  contributions  to the plan. The Company makes  matching  contributions
based on the amount of  employee  contributions  and rates set by the  Company's
Board of Directors.  Matching  contributions  totaled $2.6 million, $2.1 million
and $1.1 million in 1998, 1997 and 1996, respectively.  The Company has reserved
1.0 million shares of common stock for issuance as matching  contributions under
the ENSCO Savings Plan.

    Supplemental Executive Retirement Plan

       The  Company's   Supplemental  Executive  Retirement  Plan  (the  "SERP")
provides a tax deferred  savings plan for certain highly  compensated  employees
whose  participation  in the profit  sharing and 401(k) savings plan features of
the ENSCO Savings Plan is restricted due to funding and contribution limitations
of the Internal  Revenue Code. The SERP is a non-qualified  plan and eligibility
for  participation  is  determined  by the  Company's  Board of  Directors.  The
contribution  and Company  matching  provisions of the SERP are identical to the
ENSCO Savings Plan,  except that each  participant's  contributions and matching
contributions  under the SERP are further  limited by contribution  amounts,  if
any, under the 401(k)  savings plan feature of the ENSCO Savings Plan.  Matching
contributions  totaled $118,000 in 1998,  $56,000 in 1997 and $22,000 in 1996. A
SERP liability of $1.3 million and $689,000 is included in Other  Liabilities at
December 31, 1998 and 1997, respectively.

7.  INCOME TAXES

       The  Company  had  income of $240.2  million,  $240.5  million  and $92.8
million from its operations  before income taxes in the United States and income
of $142.3 million,  $135.3 million and $49.9 million from its operations  before
income taxes in foreign  countries for the years ended  December 31, 1998,  1997
and 1996, respectively.

       The  components  of the  provision for income taxes for each of the three
years in the period ended December 31, 1998 are as follows (in millions):

                                             1998         1997         1996
                                            ------       ------       ------
Current:
      Federal ............................  $ 41.5       $ 61.2       $  2.1 
      State ..............................     1.0          1.3           -- 
      Foreign ............................    30.7         19.6          3.3 
                                            ------       ------       ------
           Total current .................    73.2         82.1          5.4 
                                            ------       ------       ------

Deferred:
      Federal ............................    56.1         42.9         40.9 
      Foreign ............................    (5.5)        12.8          7.7 
                                            ------       ------       ------
           Total deferred ................    50.6         55.7         48.6 
                                            ------       ------       ------
Deferred tax asset valuation allowance ...      --           --        (10.0)
                                            ------       ------       ------
      Total ..............................  $123.8       $137.8       $ 44.0 
                                            ======       ======       ======

                                       37
<PAGE>



       Significant  components of deferred income tax assets (liabilities) as of
December 31, 1998 and 1997 are comprised of the following (in millions):

                                                         1998           1997
                                                       --------       --------
Deferred tax assets:
      Net operating loss carryforwards ..............  $  15.3        $  22.5 
      Liabilities not deductible for tax purposes ...      3.3            5.9 
      Safe harbor leases ............................      2.2            3.7 
      Accrued benefits ..............................      2.3            2.0 
      Foreign tax credit carryforward ...............      7.7           14.9 
      Unfunded pension liability ....................       .5            1.2 
      Other .........................................      2.7            3.8 
                                                       -------        -------
      Total deferred tax assets .....................     34.0           54.0 
                                                       -------        -------

Deferred tax liabilities:
      Property ......................................   (192.0)        (168.8)
      Tax gain recognized on transfer of assets .....     (3.2)          (3.3)
      Maritime capital construction fund ............     (5.3)            -- 
      Other .........................................     (8.5)          (6.3)
                                                       -------        -------
      Total deferred tax liabilities ................   (209.0)        (178.4)
                                                       -------        -------
          Net deferred tax liabilities ..............  $(175.0)       $(124.4)
                                                       =======        =======

Net current deferred tax asset ......................  $   5.0        $   3.8 
Net noncurrent deferred tax liability ...............   (180.0)        (128.2)
                                                       -------        -------
          Net deferred tax liability ................  $(175.0)       $(124.4)
                                                       =======        =======

       During 1996,  the Company  released the  remaining  $10.0  million of its
deferred tax asset valuation  allowance based on the assessment of the Company's
ability  to  realize  the  full  benefit  of  all  of  its  net  operating  loss
carryforwards.

       The consolidated effective income tax rate for each of the three years in
the period ended  December 31, 1998,  differs from the United  States  statutory
income tax rate as follows:

                                         1998         1997         1996 
                                        ------       ------       ------

Statutory income tax rate .............  35.0%        35.0%        35.0%
Adjustment of prior year accruals .....  (2.4)          --          --
Change in valuation allowance .........    --           --         (7.0)
Foreign taxes .........................   3.1         (0.5)        (3.3)
Alternative minimum tax ...............    --           --          1.5
Other .................................  (3.3)         2.2          4.6    
                                        ------       ------       ------
Effective income tax rate .............  32.4%        36.7%        30.8%
                                        ======       ======       ======

       At December 31, 1998, the Company had net operating loss carryforwards of
approximately  $43.6  million  and  foreign  tax  credit  carryforwards  of $7.7
million. If not utilized,  the net operating loss carryforwards expire from 2003
through 2011 and the foreign tax credit  carryforwards  expire from 2001 through
2003. As a result of certain  acquisitions in prior years,  the utilization of a
portion  of the  Company's  net  operating  loss  carryforwards  are  subject to
limitations imposed by the Internal Revenue Code of 1986.  However,  the Company
does not expect such  limitations  to have an effect upon its ability to utilize
its net operating loss carryforwards.

       It is the policy of the Company to  consider  that  income  generated  in
foreign  subsidiaries  is  permanently  invested.  A significant  portion of the
Company's  undistributed foreign earnings at December 31, 1998 were generated by
controlled foreign corporations. A portion of the undistributed foreign earnings
were taxed,  for U.S. tax purposes,  in the year that such earnings arose.  Upon
distribution  of foreign  earnings in the form of  dividends or  otherwise,  the
Company may be subject to additional U.S. income taxes. However,  deferred taxes
related  to the  future  remittance  of  these  funds  are  not  expected  to be
significant to the financial statements of the Company.

                                       38
<PAGE>

8.  COMMITMENTS AND CONTINGENCIES

    Leases

       The  Company is  obligated  under  leases for  certain of its offices and
equipment. Rental expense relating to operating leases was $4.6 million in 1998,
$3.9 million in 1997 and $3.1 million in 1996.  Future minimum  rental  payments
under the Company's noncancellable operating lease obligations having initial or
remaining  lease  terms in excess of one year are as  follows:  $3.2  million in
1999; $2.1 million in 2000; $921,000 in 2001; $511,000 in 2002; $115,000 in 2003
and none thereafter.

    Insurance

       Prior to its  acquisition  by the Company,  Dual was  self-insured  for a
substantial portion of its maritime claims exposure, with self-insured limits of
up to $500,000 for each claim.  Effective June 12, 1996,  the Company  increased
Dual's  insurance  coverage to levels  consistent  with the  Company's  existing
policies  which,  among other things,  limits the exposure to maritime claims to
$25,000 for each claim. Based on current  information,  the Company has provided
adequate reserves for such claims.

    Litigation Settlement

       In February  1991, a subsidiary  of the Company  filed an action  against
TransAmerican  Natural Gas Corporation and related  subsidiaries  and affiliates
("TransAmerican")  seeking damages for breach of contract. On April 5, 1996, the
U.S.  District  court for the  Southern  District  of Texas,  Houston  Division,
entered a judgment against TransAmerican.  As a result of the judgment, on April
18, 1996, the subsidiary of the Company entered into a settlement agreement with
TransAmerican.  Under the terms of the settlement  agreement,  the subsidiary of
the Company received  approximately $7.3 million. In the second quarter of 1996,
the  Company  recorded  a gain of $6.4  million  in Other  Income,  net,  with a
corresponding  increase  in deferred  income tax expense of $2.2  million for an
after tax gain of $4.2 million.

    Other

       At  December  31,  1998,  there  were no other  contingencies,  claims or
lawsuits  against the Company which, in the opinion of management,  would have a
material effect on its financial condition or results of operations.



                                       39
<PAGE>




9.  SEGMENT INFORMATION

       The Company's  operations  are  categorized  into two operating  segments
which are differentiated based on the core services provided by the Company, (1)
contract drilling services and (2) marine transportation services. The Company's
contract drilling segment owns or operates a fleet of 50 offshore drilling rigs,
including 36 jackup rigs,  six barge rigs and eight platform rigs. The Company's
marine  transportation  segment  owns a fleet of 36  oilfield  support  vessels.
Operating  income  for each  segment  includes  an  allocation  of  general  and
administrative   expenses  of  the  Company's   corporate  office.   Assets  and
depreciation  expense of the Company's corporate office are not allocated to the
operating  segments.  Segment  information  for each of the  three  years in the
period ended December 31, 1998 is as follows (in millions):

<TABLE>
<CAPTION>

                                                                               INDUSTRY SEGMENT

                                                           Contract         Marine
                                                           Drilling     Transportation     Corporate      Total
                                                           --------     --------------     ---------    ---------
        <S>                                                <C>           <C>               <C>          <C>      
        1998
        ----
        Revenues ......................................   $   733.5      $    79.7         $     --     $   813.2
        Operating income (loss) .......................       354.5           32.2             (1.5)        385.2
        Assets ........................................     1,660.6           72.2            260.0       1,992.8
        Capital expenditures ..........................       315.4           13.0              2.4         330.8
        Depreciation and amortization .................        77.2            4.8              1.5          83.5

        1997
        ----
        Revenues ......................................   $   720.9      $    94.2         $     --     $   815.1
        Operating income (loss) .......................       341.7           48.2              (.6)        389.3
        Assets ........................................     1,424.7           77.3            270.0       1,772.0
        Capital expenditures ..........................       268.8            9.7              3.8         282.3
        Depreciation and amortization .................        96.7            7.4               .7         104.8

        1996
        ----
        Revenues ......................................   $   408.6      $    60.2         $     --     $   468.8
        Operating income (loss) .......................       125.8           23.4              (.5)        148.7
        Assets ........................................     1,165.6           70.5             79.3       1,315.4
        Capital expenditures ..........................       170.1            4.2              1.7         176.0
        Depreciation and amortization .................        74.2            7.1               .5          81.8
</TABLE>

       The Company's  operations are  concentrated in four  geographic  regions:
North America,  Europe,  Asia Pacific and South America.  In North America,  the
Company's  operations  consist of 22 jackup  rigs,  seven  platform  rigs and 36
oilfield support vessels,  all located in the U.S. waters of the Gulf of Mexico.
The  Company's  European  operations  consist  of seven  jackup  rigs  currently
deployed in the United Kingdom, Netherlands, and Norwegian territorial waters of
the North Sea. In Asia Pacific, the Company's operations consist of seven jackup
rigs deployed in various  locations and one platform rig that is not owned,  but
is operated by the Company under a management  contract.  In South America,  the
Company's  operations  consist of six barge rigs all located on Lake  Maracaibo,
Venezuela.  The Company attributes  revenues and assets to geographic  locations
based on the location of a drilling rig or marine vessel.  For new  construction
projects,  assets are attributed to the location of future operation if known or
to  the  location  of  construction   if  ultimate   location  of  operation  is
undetermined.


                                       40
<PAGE>


     Information  by country for those  countries that account for more than 10%
of total  revenues or 10% of the Company's  long-lived  assets is as follows (in
millions):
 <TABLE>
 <CAPTION>


                                                    Revenues                          Long-lived Assets
                                        -------------------------------       --------------------------------     
                                          1998         1997       1996          1998        1997        1996   
                                        -------      -------    -------       --------    --------    --------
     <S>                                <C>          <C>        <C>           <C>         <C>         <C>      
     United States..................    $ 444.9      $ 475.3    $ 268.4       $  544.2    $  458.9    $  407.9
     Netherlands....................      142.2        121.0       66.0          146.4       150.3       157.2
     Venezuela......................       71.1         82.8       75.5          161.3       125.9       135.3
     Singapore......................         --          --         --           153.7          .7        44.3
     Other foreign countries........      155.0        136.0       58.9          383.8       441.3       246.9
                                        -------      -------    --------      --------    --------    --------
          Total.....................    $ 813.2      $ 815.1    $ 468.8       $1,389.4    $1,177.1    $  991.6
                                        =======      =======    =======       ========    ========    ========
</TABLE>

       Revenues  from one customer  were $142.2  million or 17% of  consolidated
revenues in 1998,  $121.0  million or 15% of  consolidated  revenues in 1997 and
$63.7  million or 14% of  consolidated  revenues in 1996.  Revenues from another
customer  were $82.8 million or 10% of  consolidated  revenues in 1997 and $75.5
million  or 16% of  consolidated  revenues  in 1996.  All  revenues  from  these
customers  were  associated  with  revenues  earned  by the  Company's  contract
drilling segment.

10.  TRANSACTIONS WITH RELATED PARTIES

       In  January  1997,  a director  of the  Company  settled a $675,000  note
payable to the Company.  The note payable related to the director's  purchase of
168,750  shares  (337,500  shares post split) of restricted  common stock of the
Company in 1988.  The note was settled  through  the  delivery to the Company of
restricted  shares of the  Company's  common  stock  valued  at a formula  price
provided for in the 1988 stock purchase agreement. The director retained 132,998
net shares  (265,996  shares post split) of common stock and $238,000 cash after
repayment of the note.

11.  SUPPLEMENTAL FINANCIAL INFORMATION

       Consolidated  Balance  Sheet  Information.  Accounts  receivable,  net at
December 31, 1998 and 1997 consists of the following (in millions):

                                            1998            1997  
                                           ------          ------

  Trade .............................      $115.6          $154.3
  Other .............................         8.4             6.6 
                                           ------          ------
                                            124.0           160.9 
  Allowance for doubtful accounts ...        (5.6)           (3.7)
                                           ------          ------
                                           $118.4          $157.2 
                                           ======          ====== 

          Prepaid  expenses and other at December 31, 1998 and 1997  consists of
the following (in millions):

                                            1998            1997
                                           ------          ------
  Deferred tax asset ...............       $  5.0          $  3.8 
  Prepaid expenses .................          6.5             5.7 
  Inventory ........................          4.2             3.4 
  Deposits .........................          5.7             1.1 
  Prepaid taxes ....................           --             8.8 
  Other ............................          6.4             4.9 
                                           ------          ------
                                           $ 27.8          $ 27.7 
                                           ======          ======

                                       41
<PAGE>

       Accrued  liabilities  at  December  31,  1998  and 1997  consists  of the
following (in millions):

                                             1998           1997
                                            ------         ------
  Operating expenses .................      $ 16.1         $ 18.3 
  Payroll ............................        25.7           21.1 
  Taxes ..............................        49.0           28.1 
  Insurance ..........................         1.8            4.0 
  Deferred revenue ...................         6.2            6.1 
  Accrued interest ...................         6.2            5.8 
  Accrued capital additions ..........        19.0            5.4 
  Other ..............................         2.7            5.0 
                                            ------         ------
                                            $126.7         $ 93.8 
                                            ======         ====== 

       Consolidated  Statement of Income  Information.  Maintenance  and repairs
expense for the years ended  December 31, 1998,  1997 and 1996 is as follows (in
millions):


                                              1998        1997         1996 
                                             -----       -----        -----

 Maintenance and repairs ..............      $42.0        $38.3        $30.7 

       Consolidated  Statement of Cash Flows  Information. The 1996 consolidated
statement  of cash flows  excludes  the  issuance of approximately  10.1 million
shares (20.1  million shares post split) of common stock valued at approximately
$218.4  million for the  acquisition  of  Dual.  See Note 2 "Acquisition of Dual
Drilling Company."

       Cash paid for  interest  and income  taxes for each of the three years in
the period ended December 31, 1998 is as follows (in millions):


                                              1998          1997        1996 
                                             -----         -----       -----

 Interest, net of amounts capitalized ...    $29.5         $20.4       $20.9 
 Income taxes ...........................     51.7          69.2         3.9 

       The Company  capitalized  interest of approximately $6.3 million in 1998,
$1.4 million in 1997 and none in 1996.

       Fair Value of Financial  Instruments.  The carrying amounts and estimated
fair values of the Company's financial instruments at December 31, 1998 and 1997
are as follows (in millions):
<TABLE>
<CAPTION>

                                                                           1998                      1997
                                                                   ---------------------     ---------------------   
                                                                               Estimated                 Estimated 
                                                                   Carrying      Fair        Carrying      Fair
                                                                    Amount       Value        Amount       Value 
                                                                   --------    ---------     --------    --------- 
<S>                                                                 <C>          <C>          <C>          <C>   
6.75% Notes ..................................................      $149.1       $152.5       $149.0       $150.6
7.20% Debentures .............................................       148.1        145.8        148.1        150.9
9.875% Senior Subordinated Notes .............................        74.2         75.6         74.7         77.8
Other long-term debt, including current maturities ...........        27.7         27.8         58.3         59.2
</TABLE>


       The estimated fair values were determined as follows:

       Notes, Debentures and Senior Subordinated Notes -Quoted market price.

       Other long-term debt - Interest rates currently  available to the Company
for issuance of debt with similar terms and remaining maturities.

                                       42
<PAGE>

       The  estimated  fair value of the  Company's  cash and cash  equivalents,
receivables,  trade payables and other liabilities  approximated  their carrying
values at December  31, 1998 and 1997.  The  Company has cash,  receivables  and
payables  denominated  in currencies  other than  functional  currencies.  These
financial assets and liabilities  create exposure to foreign  currency  exchange
risk.  When  warranted,  the Company  hedges such risk by entering into purchase
options or futures contracts. The Company does not enter into such contracts for
trading  purposes or to engage in speculation.  The fair value of such contracts
outstanding  at  December  31,  1998 and  1997 was  insignificant.  See  further
discussion  regarding  the  Company's  derivative  financial  instruments  under
"Market Risk" in Management's Discussion and Analysis of Financial Condition and
Results of Operations.

       Concentration  of Credit  Risk.  The  Company  provides  services  to the
offshore oil and gas industry and the Company's  customers  consist primarily of
major and  independent  oil and gas  producers as well as  government-owned  oil
companies.  The Company performs ongoing credit evaluations of its customers and
generally does not require material  collateral.  The Company maintains reserves
for  potential  credit  losses,  which to date  have  been  within  management's
expectations.  The Company's cash and cash  equivalents  are maintained in major
banks and high grade  investments.  As a result, the Company believes the credit
risk in such instruments is minimal.

12.  UNAUDITED QUARTERLY FINANCIAL DATA

       A summary of unaudited quarterly  consolidated  financial information for
1998 and 1997 is as follows (in millions, except per share amounts):

<TABLE>
<CAPTION>

                                                       First        Second        Third       Fourth    
              1998                                    Quarter       Quarter      Quarter      Quarter      Year   
              ----                                    -------       -------      -------      -------     -------  

<S>                                                    <C>           <C>          <C>          <C>         <C>    
Revenues
   Contract drilling ...............................   $220.8        $211.2       $161.7       $139.8      $733.5  
   Marine transportation ...........................     25.6          22.8         18.1         13.2        79.7 
                                                       ------        ------       ------       ------      ------
                                                        246.4         234.0        179.8        153.0       813.2 
                                                       ------        ------       ------       ------      ------
Operating expenses
   Contract drilling ...............................     73.4          73.2         70.0         71.1       287.7 
   Marine transportation ...........................     10.3          10.4         10.5         10.2        41.4 
                                                       ------        ------       ------       ------      ------
                                                         83.7          83.6         80.5         81.3       329.1 
                                                       ------        ------       ------       ------       -----

Operating margin ...................................    162.7         150.4         99.3         71.7       484.1 
Depreciation and amortization ......................     19.8          20.2         20.9         22.6        83.5 
General and administrative .........................      3.6           4.1          3.8          3.9        15.4 
                                                       ------        ------       ------       ------      ------
Operating income ...................................    139.3         126.1         74.6         45.2       385.2 
Interest income ....................................      2.7           3.8          4.0          4.6        15.1 
Interest expense, net ..............................      7.6           6.6          6.2          5.8        26.2 
Other income (expense) .............................      (.1)           .1         10.0         (1.6)        8.4 
                                                       ------        ------       ------       ------      ------
Income before income taxes and minority interest ...    134.3         123.4         82.4         42.4       382.5 
Provision for income taxes .........................     45.8          42.3         22.3         13.4       123.8 
Minority interest ..................................      1.3            .5          1.1          1.9         4.8 
                                                       ------        ------       ------       ------      ------
Net income .........................................   $ 87.2        $ 80.6       $ 59.0       $ 27.1      $253.9 
                                                       ======        ======       ======       ======      ======

Earnings per share
   Basic ...........................................   $  .62        $  .57       $  .42       $  .20      $ 1.82 
   Diluted .........................................      .61           .57          .42          .20        1.81 

</TABLE>

                                       43
<PAGE>

<TABLE>
<CAPTION>


                                                       First        Second        Third       Fourth    
              1997                                    Quarter       Quarter      Quarter      Quarter      Year  
              ----                                    -------       -------      -------      -------     -------  
<S>                                                   <C>           <C>          <C>          <C>         <C>
Revenues  
   Contract drilling ...............................  $ 140.8       $ 172.5      $ 199.5      $ 208.1     $ 720.9
   Marine transportation ...........................     20.8          22.9         23.8         26.7        94.2 
                                                      -------       -------      -------      -------     -------
                                                        161.6         195.4        223.3        234.8       815.1 
                                                      -------       -------      -------      -------     -------
Operating expenses
   Contract drilling ...............................     61.9          68.2         70.4         69.0       269.5 
   Marine transportation ...........................      8.2           8.9         10.0         10.1        37.2 
                                                      -------       -------      -------      -------     -------
                                                         70.1          77.1         80.4         79.1       306.7 
                                                      -------       -------      -------      -------     -------

Operating margin ...................................     91.5         118.3        142.9        155.7       508.4 
Depreciation and amortization ......................     24.2          25.8         27.0         27.8       104.8 
General and administrative .........................      3.1           3.8          3.5          3.9        14.3 
                                                      -------       -------      -------      -------     -------
Operating income ...................................     64.2          88.7        112.4        124.0       389.3 
Interest income ....................................      1.4           1.3          1.4          3.3         7.4 
Interest expense, net ..............................      5.8           4.8          5.0          5.8        21.4 
Other income (expense) .............................       .1            --          (.1)          .5          .5 
                                                      -------       -------      -------      -------     -------
Income before income taxes and minority interest ...     59.9          85.2        108.7        122.0       375.8 
Provision for income taxes .........................     22.7          32.1         40.4         42.6       137.8 
Minority interest ..................................       .9            .9           .5           .8         3.1 
                                                      -------       -------      -------      -------     -------
Income before extraordinary item ...................     36.3          52.2         67.8         78.6       234.9 
Extraordinary item - extinguishment of debt ........       --            --           --         (1.0)       (1.0)
                                                      -------       -------      -------      -------     -------
Net income .........................................  $  36.3       $  52.2      $  67.8      $  77.6     $ 233.9 
                                                      =======       =======      =======      =======     =======

Basic earnings per share
   Income before extraordinary item ................ $    .26       $   .37      $   .48      $   .56     $  1.67 
   Extraordinary item ..............................       --            --           --         (.01)       (.01)
                                                     --------       -------      -------      -------     -------
   Net income .....................................  $    .26       $   .37      $   .48      $   .55     $  1.66 
                                                     ========       =======      =======      =======     =======
Diluted earnings per share
   Income before extraordinary item ................ $    .25       $   .37      $   .47          .55     $  1.64 
   Extraordinary item ..............................       --            --           --         (.01)       (.01)
                                                     --------       -------      -------      -------     -------
   Net income .....................................  $    .25       $   .37      $   .47      $   .54     $  1.64 
                                                     ========       =======      =======      =======     =======
</TABLE>


Item 9. Changes  in  and  Disagreements  with  Accountants  on  Accounting   and
        Financial Disclosure

        None.



                                       44
<PAGE>


                                    PART III


Item 10. Directors  and  Executive Officers,  Item 11. Executive   Compensation,
Item 12. Security  Ownership  of  Certain  Beneficial Owners and Management, and
Item 13. Certain Relationships and Related Transactions

       Certain  information  regarding the executive officers of the Company has
been presented in "Executive  Officers of the Registrant" as included in "Item 1
Business."

       Pursuant to General Instruction G(3), the additional information required
by these items is hereby  incorporated by reference to the Company's  definitive
proxy statement, which involves the election of directors and will be filed with
the  Commission  not later than 120 days after the end of the fiscal  year ended
December 31, 1998.



                                       45
<PAGE>




                                     PART IV

Item 14. Exhibits, Financial Statement Schedules and Reports on Form 8-K

  (a) Financial statements,  financial statement schedules and exhibits filed as
part of this report:

    (1) Financial Statements of ENSCO International Incorporated            Page

         Report of Independent Accountants - PricewaterhouseCoopers LLP .... 24
         Consolidated Statement of Income .................................. 25
         Consolidated Balance Sheet ........................................ 26
         Consolidated Statement of Cash Flows .............................. 27
         Notes to Consolidated Financial Statements ........................ 28

    (2) Exhibits

         The  following  instruments  are  included as exhibits to this  Report.
         Exhibits  incorporated  by reference are so indicated by  parenthetical
         information.

Exhibit
  No.                                  Document
- -------                                --------
2.1  - Agreement  and  Plan of  Merger,  dated  March 21,  1996,  between  ENSCO
       International  Incorporated, DDC  Acquisition  Company and DUAL  DRILLING
       COMPANY (incorporated  by reference  to Exhibit 99.7 to the  Registrant's
       Form 8-K dated March 21, 1996, File No. 1-8097).

2.2  - Principal Stockholder  Agreement between ENSCO International Incorporated
       and Dual Invest AS  (incorporated  by  reference  to Exhibit  99.8 to the
       Registrant's Form 8-K dated March 21, 1996, File No. 1-8097).

2.3  - Amendment  No.  1  to  Agreement  and Plan of Merger,  dated May 7, 1996,
       between  ENSCO International  Incorporated,  DDC  Acquisition Company and
       DUAL  DRILLING  COMPANY  (incorporated  by  reference  to  Exhibit 2.2 of
       Amendment No. 1 to the Registrant's Registration  Statement  on  Form S-4
       filed May 10, 1996, Registration No. 333-3411).

3.1  - Amended  and  Restated  Certificate  of  Incorporation  (incorporated  by
       reference  to  Exhibit  3.1  to the Registrant's Quarterly Report on Form
       10-Q for the quarter ended June 30, 1997, File No. 1-8097).

3.2  - Bylaws of  the Company, as amended  (incorporated by reference to Exhibit
       3.2 to the Registrant's  Annual  Report on Form  10-K for the year  ended
       December 31, 1992, File No. 1-8097).

4.1  - Indenture,  dated  November  20,  1997,  between  the Company and Bankers
       Bankers Trust Company,  as Trustee (incorporated  by reference to Exhibit
       4.1 to the  Registrant's  Current Report on Form 8-K dated  November  24,
       1997, File No. 1-8097).

4.2  - First  Supplemental   Indenture,  dated  November 20,  1997,  between the
       Company  and  Bankers  Trust  Company,  as  trustee,  supplementing   the
       Indenture dated as of November 20,  1997  (incorporated  by  reference to
       Exhibit 4.2 to the Registrant's Current Report on Form 8-K dated November
       24, 1997, File No. 1-8097).

4.3  - Form  of   Note  (incorporated   by  reference  to  Exhibit  4.3  to  the
       Registrant's Current Report on Form 8-K dated November 24, 1997, File No.
       1-8097).

4.4  - Form  of  Debenture  (incorporated  by  reference  to Exhibit  4.4 to the
       Registrant's  Current  Report  on  Form 8-K dated November 24, 1997, File
       No. 1-8097).



                                       46
<PAGE>


Exhibit
  No.                                  Document
- -------                                --------

4.5  - Rights Agreement,  dated  February  21, 1995,  between  the  Company  and
       American Stock Transfer & Trust Company, as Rights  Agent, which includes
       as Exhibit A the Form of Certificate of  Designations  of Series A Junior
       Participating  Preferred  Stock of  ENSCO International Incorporated,  as
       Exhibit B the Form of Right  Certificate, and as Exhibit C the Summary of
       Rights  to  Purchase  Shares of  Preferred  Stock of ENSCO  International
       Incorporated (incorporated by reference to Exhibit 4 to Registrant's Form
       8-K dated February 21, 1995, File No. 1-8097).

4.6  - First  Amendment  to Rights Agreement, dated March 3, 1997, between ENSCO
       International  Incorporated  and American Stock Transfer & Trust Company,
       as  Rights  Agent  (incorporated  by  reference  to  Exhibit  4.2  to the
       Registrant's Current Report on Form 8-K dated March 3, 1997, File No.
       1-8097).

4.7  - Certificate of  Designation  of Series A Junior  Participating  Preferred
       Stock of the Company  (incorporated  by  reference  to Exhibit 4.6 to the
       Registrant's Annual Report on Form 10-K/A for the year ended December 31,
       1995, File No. 1-8097).

10.1 - ENSCO Incentive Plan,  as  amended  (incorporated by reference to Exhibit
       10.1 to the  Registrant's  Annual  Report on Form 10-K for the year ended
       December 31, 1993, File No. 1-8097).

10.2 - Amendment  to  ENSCO   Incentive   Plan,    dated   November   11,   1997
       (incorporated  by reference to Exhibit  10.2 to the  Registrant's  Annual
       Report on Form 10-K for the year ended December 31, 1997, File No.
       1-8097).

10.3 - Construction   and  Purchase  Agreement  dated as  of   February  3, 1992
       between Nissho Iwai Hong Kong Corporation  Limited as Purchaser and ENSCO
       Drilling  Company as  Contractor  (incorporated  by  reference to Exhibit
       10.21 to the  Registrant's  Annual Report on Form 10-K for the year ended
       December 31, 1993, File No. 1-8097).

10.4 - Sale and  Financing  Agreement dated as of February 3, 1992 between ENSCO
       Drilling  Venezuela,   Inc.  as  Purchaser  and  Nissho  Iwai  Hong  Kong
       Corporation Limited as Seller (incorporated by reference to Exhibit 10.22
       to the  Registrant's  Annual  Report  on Form  10-K  for the  year  ended
       December 31, 1993, File No. 1-8097).

10.5 - Construction  and Purchase  Agreement  dated  November  12,  1993, by and
       between  ENSCO  Drilling  Company and Nissho  Iwai Hong Kong  Corporation
       Limited  (incorporated  by reference to Exhibit 10.28 to the Registrant's
       Annual Report on Form 10-K for the year ended December 31, 1993, File No.
       1-8097).

10.6 - Sale  and Financing  Agreement  dated  November 12, 1993, by  and between
       Nissho Iwai Hong Kong Corporation  Limited and ENSCO Drilling  Venezuela,
       Inc.  (incorporated  by  reference to Exhibit  10.29 to the  Registrant's
       Annual Report on Form 10-K for the year ended December 31, 1993, File No.
       1-8097).

10.7 - Loan  Agreement  dated  October 14,  1993,  by  and  among  ENSCO  Marine
       Company and The CIT  Group/Equipment  Financing,  Inc.  (incorporated  by
       reference to Exhibit 10.27 to the Registrant's Annual Report on Form 10-K
       for the year ended December 31, 1993, File No. 1-8097).

10.8 - Partial  Satisfaction  of Mortgage,  dated  November  29,  1994,  between
       Wilmington  Trust  Company,  as  trustee  for  the  benefit  of  The  CIT
       Group/Equipment  Financing,  Inc., and ENSCO Marine Company (incorporated
       by reference to Exhibit 10.30 to the  Registrant's  Annual Report on Form
       10-K for the year ended December 31, 1994, File No. 1-8097).


                                       47
<PAGE>


Exhibit
  No.                                  Document
- -------                                --------

10.9  - Modification and  Amendment  of  First  Preferred  Fleet  Ship Mortgage,
        dated January 23, 1995, by ENSCO  Marine  Company and  Wilmington  Trust
        Company, as  trustee  for   the   benefit  of  The  CIT  Group/Equipment
        Financing, Inc. (incorporated  by  reference  to  Exhibit  10.31 to the
        Registrant's Annual  Report on Form 10-K for the year ended December 31,
        1994, File No. 1-8097).

10.10 - ENSCO Savings Plan, as revised and restated (incorporated  by  reference
        to Exhibit 10.17 to the Registrant's  Annual Report on Form 10-K for the
        year ended December 31, 1997, File 1-8097).

10.11 - ENSCO Supplemental  Executive Retirement Plan, as  amended  and restated
        (incorporated by reference to Exhibit 10.18 to the  Registrant's  Annual
        Report on Form 10-K for the year ended December 31, 1997, File 1-8097).

10.12 - Indemnification  Agreement  between  the  Company  and its  officers and
        directors   (incorporated   by  reference   to  Exhibit   10.19  to  the
        Registrant's  Annual Report on Form 10-K for the year ended December 31,
        1997, File 1-8097).

10.13 - Credit   Agreement   among   ENSCO  International  Incorporated,   ENSCO
        Offshore Company,  Dual Holding Company,  various lending  institutions,
        Bankers Company as  Administrative  Agent, Den Norske Bank ASA, New York
        Branch as  Syndication  Agent and ABN Amro  Bank N.V.  as  Documentation
        Agent  concerning a $185 million  Revolving Credit Loan, dated as of May
        21, 1998  (incorporated by reference to Exhibit 10.1 to the Registrant's
        Quarterly  Report on Form 10-Q for the quarter ended June 30, 1998, File
        No. 1-8097).

10.14 - ENSCO International  Incorporated 1998 Incentive Plan (incorporated by
        reference to Exhibit 4.1 to the  Registrant's  Form S-8 filed on July 7,
        1998, Registration No. 333-58625).

*21.1 - Subsidiaries of the Registrant.

*23.1 - Consent of PricewaterhouseCoopers LLP.

*27.1 - Financial Data Schedule (EDGAR version only).
- ----------
* Filed herewith







                                       48
<PAGE>



Executive Compensation Plans and Arrangements

       The  following  is  a  list  of  all  executive  compensation  plans  and
arrangements required to be filed as an exhibit to this Form 10-K:

   1.        ENSCO  International  Incorporated  1998  Incentive  Plan (filed as
             Exhibit 10.14 hereto and  incorporated  by reference to Exhibit 4.1
             to the  Registrant's  Form S-8 filed on July 7, 1998,  Registration
             No. 333-58625).

   2.        ENSCO  Incentive Plan, as amended (filed as Exhibit 10.1 hereto and
             incorporated  by  reference  to  Exhibit  10.1 to the  Registrant's
             Annual  Report on Form 10-K for the year ended  December  31, 1993,
             File No. 1-8097).

   3.        Amendment to ENSCO Incentive  Plan,  dated November 11, 1997 (filed
             as Exhibit  10.2 hereto and  incorporated  by  reference to Exhibit
             10.2 to the  Registrant's  Annual  Report on Form 10-K for the year
             ended December 31, 1993, File No. 1-8097).

   4.        ENSCO  Supplemental  Executive  Retirement  Plan,  as  amended  and
             restated  (filed  as  Exhibit  10.11  hereto  and  incorporated  by
             reference to Exhibit 10.2 to the Registrant's Annual Report on Form
             10-K for the year ended December 31, 1993, File No.
             1-8097).

       The Company will furnish to the Securities and Exchange  Commission  upon
request, all constituent instruments defining the rights of holders of long-term
debt of the Company not filed  herewith as permitted  by paragraph  4(iii)(A) of
Item 601 of Regulation S-K.

  (b)        Reports on Form 8-K

             No Current Reports on Form 8-K were filed by the Company during the
             fourth quarter of the year ended December 31, 1998.




                                       49
<PAGE>



                                   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 February 25, 1999.

                                      ENSCO International Incorporated
                                               (Registrant)


                                      By   /s/     CARL F. THORNE            
                                           -----------------------------
                                                   Carl F. Thorne
                                               Chairman, President and
                                               Chief Executive Officer

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

          Signatures                    Title                       Date
          ----------                    -----                       ----


 /s/      CARL F. THORNE                            
 ------------------------------  Chairman, President           February 25, 1999
          Carl F. Thorne           Chief Executive Officer
                                   and Director

 /s/    RICHARD A. WILSON       
 ------------------------------  Senior Vice President, Chief  February 25, 1999
        Richard A. Wilson          Operating Officer and
                                   Director

 /s/   C. CHRISTOPHER GAUT          
 ------------------------------  Vice President, Chief         February 25, 1999
       C. Christopher Gaut         Financial Officer


 /s/      H. E. MALONE       
 ------------------------------  Vice President, Chief         February 25, 1999
          H. E. Malone             Accounting Officer and
                                   Controller

 /s/     CRAIG I. FIELDS      
 ------------------------------  Director                      February 25, 1999
         Craig I. Fields


 /s/   ORVILLE D. GAITHER, SR.      
 ------------------------------  Director                      February 25, 1999
       Orville D. Gaither, Sr.


 /s/    GERALD W. HADDOCK           
 ------------------------------  Director                      February 25, 1999
        Gerald W. Haddock


 /s/    DILLARD S. HAMMETT         
 ------------------------------  Director                      February 25, 1999
        Dillard S. Hammett


 /s/    THOMAS L. KELLY, II     
 ------------------------------  Director                      February 25, 1999
        Thomas L. Kelly II


 /s/    MORTON H. MEYERSON         
 ------------------------------  Director                      February 25, 1999
        Morton H. Meyerson




                                       50


                                                                               

                         SUBSIDIARIES OF THE REGISTRANT


         The   following   list  sets  forth  the  name  and   jurisdiction   of
incorporation  of  each  subsidiary  of  the  Registrant   (other  than  certain
subsidiaries that, considered in the aggregate as a single subsidiary, would not
constitute a significant  subsidiary)  and the  percentage of voting  securities
owned by each subsidiary's immediate parent. Each such subsidiary is included in
the Consolidated Financial Statements.

<TABLE>
<CAPTION>
                                                                                       Percentage
                                                                      Percentage       of Voting
                                                                      of Voting        Securities
                                                                      Securities        Owned by
                                                                      Owned by         Immediate
                                                                      Registrant         Parent
                                                                      ----------       ----------

<S>                                                                      <C>              <C>
ENSCO Drilling Company (Delaware)...................................     100%
   ENSCO de Venezuela, C.A. (Venezuela).............................                      100%
   ENSCO Drilling (Caribbean), Inc. (Cayman Islands)................                       85%
      ENSCO Drilling Venezuela, Inc. (Cayman Islands)...............                      100%
ENSCO Holding Company (Delaware)....................................     100%
   ENSCO Offshore Company (Delaware)................................                      100%
      ENSCO Offshore U.K. Limited (U.K.)............................                      100%
      ENSCO Australia Corporation I (Delaware)......................                      100%
         ENSCO Offshore Partnership (Australia).....................                        1%
      ENSCO Australia Corporation II (Delaware).....................                      100%
         ENSCO Offshore Partnership (Australia).....................                       99%
ENSCO Incorporated (Texas)..........................................     100%
ENSCO Limited (Cayman Islands)......................................     100%
ENSCO Marine Company (Delaware).....................................     100%
ENSCO Oceanics Company (Delaware)...................................     100%
   ENSCO Netherlands Ltd. (Cayman Islands)..........................                      100%
   ENSCO Asia Pacific Pte. Limited (Singapore)......................                      100%
   Petroleum Finance Corporation (Cayman Islands)...................                      100%
   ENSCO Brazil Servicos de Petroleo Limitada (Brazil)..............                       99%
   ENSCO Drilling Company (Nigeria), Ltd. (Nigeria).................                       99%
ENSCO Offshore International Company (Cayman).......................     100%
Dual Holding Company (Delaware).....................................     100%
   ENSCO Offshore Company II (Delaware).............................                      100%
      ENSCO Qatar Company (Delaware)................................                      100%
   ENSCO Oceanics Company II (Delaware).............................                      100%
      ENSCO Maritime Limited (Bermuda)..............................                      100%
         Dual Drilling Arabia, Ltd. (Saudi Arabia)..................                       50%
      ENSCO Asia Company (Texas)....................................                      100%
         P. T. Dual Perkasa Offshore (Indonesia)....................                       80%
         SOBRAPER Sociedade Brasileira de Perfuacoes Ltda. (Brazil).                       99%
   ENSCO Platform Company (Texas)...................................                      100%
      Dual Drilling Nigeria Ltd.(Nigeria)...........................                      100%
      Dual Drilling de Venezuela (Venezuela)........................                      100%
   ENSCO Platform AS (Norway).......................................                      100%
   ENSCO Malaysia Company (Delaware)................................                      100%
      ENSCO Gerudi (M) Sdn. Bhd.(Malaysia)..........................                       49%
</TABLE>




                                                                   
 

                       CONSENT OF INDEPENDENT ACCOUNTANTS


We  hereby  consent  to the  incorporation  by  reference  in  the  Prospectuses
constituting parts of the Registration  Statements on Form S-3 (Nos.  333-37897,
333-03575,  33-64642,  33-49590,  33-46500,  33-43756 and 33-42965) and Form S-8
(Nos. 333-58625,  33-40282,  33-41294, 33-35862, 33-32447 and 33-14714) of ENSCO
International  Incorporated  of our report dated  January 25, 1999  appearing on
page 24 of this Form 10-K.

/s/ PricewaterhouseCoopers LLP


Dallas, Texas
February 26, 1999




<TABLE> <S> <C>

      <ARTICLE>                                                             5
      <LEGEND>
      THIS SCHEDULE  CONTAINS SUMMARY FINANCIAL  INFORMATION  EXTRACTED FROM THE
      DECEMBER 31, 1998 FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS ENTIRETY BY
      REFERENCE TO SUCH FINANCIAL STATEMENTS.
      </LEGEND>
      <MULTIPLIER>                                                      1,000
             
       <S>                        <C>
      <PERIOD-TYPE>                                                    12-MOS
      <FISCAL-YEAR-END>                                           DEC-31-1998
      <PERIOD-START>                                              JAN-01-1998
      <PERIOD-END>                                                DEC-31-1998
      <CASH>                                                          330,100
      <SECURITIES>                                                          0
      <RECEIVABLES>                                                   124,000
      <ALLOWANCES>                                                      5,600
      <INVENTORY>                                                       4,200
      <CURRENT-ASSETS>                                                476,300
      <PP&E>                                                        1,799,200
      <DEPRECIATION>                                                  409,800
      <TOTAL-ASSETS>                                                1,992,800
      <CURRENT-LIABILITIES>                                           159,400
      <BONDS>                                                         375,500
                                                       0
                                                                 0
      <COMMON>                                                         15,600
      <OTHER-SE>                                                    1,229,400
      <TOTAL-LIABILITY-AND-EQUITY>                                  1,992,800
      <SALES>                                                               0
      <TOTAL-REVENUES>                                                813,200
      <CGS>                                                                 0
      <TOTAL-COSTS>                                                   329,100
      <OTHER-EXPENSES>                                                 98,900
      <LOSS-PROVISION>                                                      0
      <INTEREST-EXPENSE>                                               26,200
      <INCOME-PRETAX>                                                 382,500
      <INCOME-TAX>                                                    123,800
      <INCOME-CONTINUING>                                             253,900
      <DISCONTINUED>                                                        0
      <EXTRAORDINARY>                                                       0
      <CHANGES>                                                             0
      <NET-INCOME>                                                    253,900
      <EPS-PRIMARY>                                                      1.82
      <EPS-DILUTED>                                                      1.81

              
      
</TABLE>


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