DI INDUSTRIES INC
8-K, 1997-01-13
DRILLING OIL & GAS WELLS
Previous: TELOS CORP, 8-K, 1997-01-13
Next: UNIT INSTRUMENTS INC, 10-Q, 1997-01-13



                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

                       PURSUANT TO SECTION 13 OR 15(D) OF
                       THE SECURITIES EXCHANGE ACT OF 1934

      Date of Report: (Date of earliest event reported): December 30, 1996

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


        TEXAS                                                  1-8226           
(STATE OF INCORPORATION)                                (COMMISSION FILE NUMBER)

                                   74-2144774
                        (IRS EMPLOYER IDENTIFICATION NO.)

                            450 GEARS ROAD, SUITE 625
                              HOUSTON, TEXAS 77077
              (ADDRESS OF REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)

                                  713/874-0202
              (REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE)

                                (NOT APPLICABLE)
          (FORMER NAME OR FORMER ADDRESS, IF CHANGED SINCE LAST REPORT)
<PAGE>
ITEM 2.        ACQUISITION OR DISPOSITION OF ASSETS

        On December 31, 1996, DI Industries, Inc. a Texas corporation (the
"Company"), completed the acquisition of the South Texas operating assets of
Diamond M Onshore, Inc. ("Diamond M"), a wholly-owned subsidiary of Diamond
Offshore Drilling, Inc., pursuant to a definitive asset purchase agreement. The
assets were acquired by a wholly-owned subsidiary of the Company for
approximately $26.0 million in cash based on arms length negotiations among the
parties and consist of ten land drilling rigs, all of which are currently
operating, 19 rig hauling trucks, a yard facility in Alice, Texas and various
other equipment and drill pipe. The Company hired the majority of the personnel
operating these assets. Diamond M utilized and the Company intends to utilize
these assets in contract oil and gas land drilling services.

        The Company also entered into a loan facility (the "Facility") dated as
of December 31, 1996, with Bankers Trust Company, ING (US) Capital Corporation
and Nordlandsbanken AS, which provided the funds to acquire the assets of
Diamond M. The Facility provides for an initial $35.0 million reducing revolving
line of credit which reduces by $5.0 million each year until maturity on
December 31, 1999. The Facility is secured by substantially all of the Company's
assets and calls for quarterly interest payments on the outstanding balance at
either LIBOR plus 3% or the lending institution's prime rate plus 2%.
Additionally, the Facility contains customary affirmative and negative
covenants. In connection with entering into the Facility, the Company utilized
existing working capital to repay the $9.4 million balance outstanding under its
previous term loan agreement.

ITEM 5.        OTHER EVENTS

        PRIVATE PLACEMENT

        On December 30, 1996, and in connection with closing the Facility, the
Company completed a private placement of 1.75 million shares of the Company's
common stock, par value $0.10 per share ("Common Stock"), for approximately
$4.12 million to four funds managed by Wexford Management LLC ("Wexford"). The
proceeds generated from this private placement were utilized to repay a $4.0
million note. The Company also agreed to issue more shares of Common Stock to
the Wexford funds (the "Additional Wexford Shares") if, and to the extent that,
the market value of the shares of Common Stock held by the Wexford funds on
December 30, 1997, plus the net proceeds from any sale of the Common Stock by
the Wexford funds prior to December 30, 1997 is, in total, less than $4.12
million. If such a shortfall in market value occurs, the number of Additional
Wexford Shares to be issued will be determined by dividing the amount of the
shortfall by the average closing price of the Common Stock in each of the ten
trading days prior December 30, 1997, excluding from the ten trading days any
day on which the Wexford funds or their affiliates offered or sold Common Stock
on the American Stock Exchange or other principal securities market on which the
Common Stock is then traded. The additional Wexford Shares will be issuable
sooner than December 30, 1997, if, and promptly after, the Wexford funds dispose
of all shares purchased by them in the private placement. The Company retained
the option of paying any shortfall amount in cash rather than

                                        2
<PAGE>
shares of Common Stock. Immediate shelf registration rights were also granted by
the Company in connection with this private placement.

        FLOURNOY ACQUISITION

        The Company entered into a definitive asset purchase agreement dated as
of December 31, 1996, to acquire the operating assets of Flournoy Drilling
Company ("Flournoy") for approximately 12.43 million shares of Common Stock and
assumption of approximately $800,000 of Flournoy's debt, which the Company will
refinance at closing. The assets to be acquired include 13 land drilling rigs,
17 rig hauling trucks, a yard and office facility in Alice, Texas and various
other equipment and drill pipe. The Company expects to offer employment to
Flournoy's operating personnel. Mr. Lucien Flournoy, the founder of Flournoy,
will join the Company's Board of Directors. The Company anticipates closing this
acquisition by January 31, 1997, subject to review of the transaction by federal
antitrust authorities, and satisfaction of other conditions contained in the
definitive asset purchase agreement. The Company agreed to issue additional
shares to Flournoy's shareholders (the "Additional Flournoy Shares") if, and to
the extent that, the aggregate market value of one-half of the shares received
by the Flournoy shareholders on the first anniversary date of the closing of the
acquisition plus the gross proceeds from any sales of Common Stock by the
Flournoy shareholders prior to the anniversary date is, in total, less than the
product of $2.00 multiplied by one-half of the total number of shares of Common
Stock received by the Flournoy shareholders. If such a shortfall in market value
occurs, the number of Additional Flournoy Shares to be issued will be determined
by dividing the amount of the shortfall by the average closing price of the
Common Stock in each of the ten trading days prior to the first anniversary of
the closing. During such ten trading day period, each of the Flournoy
Shareholders will agree not to sell any shares received by them at closing. The
Company will retain the option of paying any shortfall amount in cash rather
than shares of Common Stock. Immediate shelf registration rights will be granted
by the Company upon closing.

ITEM 7.        FINANCIAL STATEMENTS AND EXHIBITS

        FINANCIAL STATEMENTS OF BUSINESSES ACQUIRED

        The following sets forth Diamond M Onshore, Inc.'s Statement of Net
Assets of Certain Properties as of September 30, 1996 (Unaudited) and December
31, 1995, and of Revenues and Certain Expenses of Certain Properties for the
Nine Months Ended September 30, 1996 (Unaudited) and the Year Ended December 31,
1995.

                                        3
<PAGE>
INDEPENDENT AUDITORS' REPORT

To the Management of Diamond Offshore
   Drilling, Inc. and Drillers, Inc.
Houston, Texas

We have audited the accompanying statement of net assets of certain properties
of Diamond M Onshore, Inc. (the "Company"), a wholly owned subsidiary of Diamond
Offshore Drilling, Inc., which are to be sold pursuant to the Asset Purchase
Agreement (the "Agreement") between the Company and Drillers, Inc., dated as of
November 12, 1996, as described in Note 1, as of December 31, 1995, and the
related statement of revenues and certain expenses (defined as being operating
revenues less direct operating expenses) for the year then ended. 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 audit.

We conducted our audit in accordance with generally accepted auditing standards.
Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audit provides a reasonable basis for our opinion.

The accompanying financial statements were prepared for the purpose of complying
with the rules and regulations of the Securities and Exchange Commission for
inclusion in the Form 8-K of Drillers, Inc. Material amounts, described in Note
1 to the financial statements, that would not be comparable to those resulting
from the proposed future operations of the assets are excluded, and the
statements are not intended to be a complete presentation of the revenues and
expenses of the assets.

In our opinion, the above-mentioned financial statements present fairly, in all
material respects, the net assets of certain properties of the Company, at
December 31, 1995, which are to be sold pursuant to the Agreement referred to
above, and the related statement of revenues and certain expenses, as defined
above, for the year then ended, in conformity with generally accepted accounting
principles.

DELOITTE & TOUCHE LLP

December 16, 1996

                                        4
<PAGE>
DIAMOND M ONSHORE, INC.

STATEMENTS OF NET ASSETS OF CERTAIN PROPERTIES
AS OF SEPTEMBER 30, 1996 (UNAUDITED) AND DECEMBER 31, 1995

                                                 SEPTEMBER 30,
                                                     1996           DECEMBER 31,
                                                 (UNAUDITED)           1995

RIG INVENTORY AND SUPPLIES ...............        $  220,319         $  223,609
                                                  ----------          ----------
DRILLING RIGS AND OTHER PROPERTY AND EQUIPMENT-
   Less accumulated depreciation of $10,149,715
   in 1996 and $9,580,830 in 1995 (See Note 2)     1,427,194          1,615,386
LAND .....................................            50,000             50,000
                                                  ----------          ----------
          Total ..........................          1,477,194          1,665,386
                                                  ----------          ----------
NET ASSETS ...............................         $1,697,513         $1,888,995
                                                  ----------          ----------
See notes to financial statements.

                                        5
<PAGE>
DIAMOND M ONSHORE, INC.

STATEMENTS OF REVENUES AND CERTAIN EXPENSES OF CERTAIN PROPERTIES FOR THE NINE
MONTHS ENDED SEPTEMBER 30, 1996 (UNAUDITED) AND FOR THE YEAR ENDED DECEMBER 31,
1995

                                              SEPTEMBER 30,
                                                   1996            DECEMBER 31,
                                               (UNAUDITED)            1995
REVENUES .................................   $   16,380,119       $ 19,926,381
                                             --------------       ------------
CERTAIN EXPENSES:
   Drilling ..............................       13,585,974         17,681,793
   Depreciation ..........................          568,885          1,125,106
   Other .................................          349,130            466,980
                                             --------------       ------------
          Total expenses .................       14,503,989         19,273,879
                                             --------------       ------------
REVENUES IN EXCESS OF CERTAIN EXPENSES ...    $   1,876,130        $   652,502
                                             --------------       ------------

See notes to financial statements.

                                        6
<PAGE>
DIAMOND M ONSHORE, INC.

NOTES TO THE FINANCIAL STATEMENTS OF CERTAIN PROPERTIES FOR THE NINE MONTHS
ENDED SEPTEMBER 30, 1996 (UNAUDITED) AND FOR THE YEAR ENDED DECEMBER 31, 1995


1. BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES

   BASIS OF PRESENTATION - The financial statements of certain properties of
   Diamond M Onshore, Inc. (the "Company"), a wholly owned subsidiary of Diamond
   Offshore Drilling, Inc. (the "Parent"), include only those accounts related
   to the assets to be sold to Drillers, Inc. ("DI"), pursuant to the Asset
   Purchase Agreement (the "Agreement"), dated as of November 12, 1996 between
   the Company and DI.

   In the opinion of management, all adjustments necessary for a fair
   presentation of the unaudited results for the nine months ended September 30,
   1996 and the balances disclosed in footnote 4 are included. The results for
   interim periods are not necessarily indicative of results for the full year.

   The Company engages principally in the contract drilling of oil and gas wells
   primarily for independent and major integrated oil companies. The assets
   being acquired consist primarily of 10 land rigs currently deployed in Texas.
   All rigs are owned by the Company.

   Operating revenues and direct operating expenses are presented on the accrual
   basis of accounting. The accompanying financial statements are not
   representative of the actual operations for the period presented since
   certain indirect expenses have been excluded. Expenses excluded consist of
   interest, gain and/or loss on sales of rigs and drilling equipment and other
   insignificant costs not directly related to the acquired assets.

   USE OF ESTIMATES IN THE PREPARATION OF FINANCIAL STATEMENTS - 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 at the date of the financial statements and
   the reported amount of revenues and certain expenses during the reporting
   period. Actual results could differ from these estimates.

   RIG INVENTORY AND SUPPLIES - Inventories primarily consist of replacement
   parts and supplies held for use in the operations of the Company. Inventories
   are stated at the lower of cost or estimated value.

   DRILLING RIGS AND OTHER PROPERTY AND EQUIPMENT - Drilling rigs and other
   property and equipment are carried at cost. Maintenance and repairs are
   charged to income currently while betterments are capitalized.

                                        7
<PAGE>
   For financial reporting purposes, depreciation is provided on the
   straight-line method over the remaining estimated useful lives from the date
   the asset is placed into service. The estimated useful lives of the Company's
   land drilling rigs is 5 years. Other property and equipment are estimated to
   have useful lives ranging from 3 to 10 years.

   IMPAIRMENT OF LONG-LIVED ASSETS - The Company reviews its long-lived assets
   for impairment when changes in circumstances indicate that the carrying
   amount of an asset may not be recoverable.

   In 1995, the Company adopted Statement of Financial Accounting Standards
   ("SFAS") No. 121, "Accounting for the Impairment of Long-Lived Assets and for
   Long-Lived Assets to Be Disposed Of." SFAS No. 121 requires that long-lived
   assets and certain identifiable intangibles to be held and used be reported
   at the lower of carrying amount or fair value. Assets to be disposed of and
   assets not expected to provide any future service potential to the Company
   are recorded at the lower of carrying amount or fair value less cost to sell.
   The adoption of SFAS No. 121 did not have a material effect on the Company's
   financial position or results of operations.

   REVENUE RECOGNITION - Income from dayrate drilling contracts is recognized
   currently. In connection with such drilling contracts, the Company may
   receive lump-sum fees for the mobilization of equipment and personnel.
   Mobilization costs and revenues are recognized currently.

   Income from turnkey contracts is recognized on the percentage of completion
   method. Provisions for future losses on turnkey contracts are recognized when
   it becomes apparent that contract drilling expenses to be incurred on a
   specific contract will exceed the revenue from the contract.

                                        8
<PAGE>
2. DRILLING RIGS AND OTHER PROPERTY AND EQUIPMENT

   Cost and accumulated depreciation of drilling rigs and other property and
   equipment are summarized as follows:

                                               SEPTEMBER 30,
                                                   1996            DECEMBER 31,
                                                (UNAUDITED)            1995

Drilling rigs and equipment ............       $  9,410,929        $  9,355,078
Trucks and automobiles .................          1,583,845           1,262,753
Buildings ..............................            553,290             553,290
Office equipment and other .............             28,845              25,095
                                               ------------        ------------
                                                 11,576,909          11,196,216
Less accumulated depreciation ..........        (10,149,715)         (9,580,830)
                                               ------------        ------------
Total ..................................       $  1,427,194        $  1,615,386
                                               ------------        ------------

3.  RELATED-PARTY TRANSACTIONS

    The Company is allocated general and administrative expenses by the Parent.
    The allocation amount was determined based on an estimated percentage of
    total costs attributable to the Company. The allocations, included in Other
    Expenses, were approximately $250,000 and $188,000 for the year ended
    December 31, 1995 and the period ended September 30, 1996 (unaudited),
    respectively. Management believes this allocation method is reasonable.

4.  OMITTED HISTORICAL EXPENSES (UNAUDITED)

    As discussed in footnote 1 interest as well as gain and/or loss on sales of
    rigs and drilling equipment are not directly related to the acquired assets
    and therefore have been excluded from the accompanying financial statements.
    Such excluded amounts approximated $1,100,000 and $21,000 (gain),
    respectively for the period ended December 31, 1995 and $342,000 and $0,
    respectively for the nine months ended September 30, 1996.

                                        9
<PAGE>
    PRO FORMA FINANCIAL INFORMATION

                               DI INDUSTRIES, INC.
              UNAUDITED PRO FORMA CONSOLIDATED FINANCIAL STATEMENTS

    The accompanying unaudited pro forma consolidated financial statements of DI
Industries, Inc. (the "Company") are based upon the historical consolidated
financial statements of the Company as of and for the nine months ended
September 30, 1996 and for the year ended December 31, 1995. These historical
financial statements have been adjusted for certain items as discussed in the
notes to these unaudited pro forma consolidated financial statements.

    On December 31, 1996 the Company completed the acquisition of the South
Texas operating assets of Diamond M Onshore, Inc. ("Diamond M"), a wholly owned
subsidiary of Diamond Offshore Drilling, Inc., pursuant to a definitive asset
purchase agreement. The Company acquired the assets for approximately $26
million in cash which includes ten land drilling rigs, all of which are
currently operating, 19 rig hauling trucks, a yard and office facility in Alice,
Texas and various other drill pipe and equipment.

    The Company also entered into a loan facility (the "Facility") dated as of
December 31, 1996 with Bankers Trust Company, ING (US) Capital Corporation and
Nordlandsbanken AS which provided the funds to acquire the assets of Diamond M.
The Facility provides for an initial $35 million reducing revolving line of
credit which reduces by $5.0 million each anniversary date until maturity on
December 31, 1999. The Facility is secured by substantially all of the Company's
assets and calls for quarterly interest payments on the outstanding balance at
either LIBOR plus 3% or the lending institution's prime rate plus 2%. Prior to
and as a condition of closing the Facility, the Company paid off its existing
credit facility with Nordlandsbanken AS in the amount of approximately $9.5
million.

    In connection with closing the Facility, the Company also completed a
private placement of 1.75 million shares of the Company's common stock for
approximately $4.12 million to four funds managed by Wexford Management LLC.
These proceeds were utilized to repay a $4.0 million note plus accrued interest
of $132,000. The Company also agreed to issue more shares of the Company's
common stock to the extent the Wexford funds hold value less than $4.12 million
on the one-year anniversary date of the issuance.

    On August 29, 1996 the Company closed two separate transactions
(collectively the "Mergers") resulting in a $25 million equity infusion and the
acquisition of deep drilling equipment.

    In the first transaction, R. T. Oliver, Inc. ("RTO") and Land Rig
Acquisition Corporation ("LRAC") merged into a new subsidiary of the Company
with the capital stock of RTO and LRAC being exchanged for 39,423,978 shares of
the Company's common stock. In addition, warrants were issued to acquire up to
1,720,000 additional shares of DI common stock, the exercise of which is
contingent upon the occurrence of certain events. Subsequently, warrants
representing 1,000,000 shares have been canceled. This transaction resulted in
the acquisition of 18 inactive, deep capacity

                                       10
<PAGE>
land drilling rigs which includes five 3,000 horsepower and nine 2,000
horsepower land rigs which are rated for depths of 25,000 feet or greater.

    In the second transaction, Somerset Investment Corp. ("Somerset"), was
merged into the Company. The stock Somerset was exchanged for 39,423,978 shares
of DI common stock and warrants to acquire up to 1,720,000 shares of DI common
stock, the exercise of which is contingent upon the occurrence of certain
events. Subsequently, warrants representing 1,000,000 shares have been canceled.
This merger transaction resulted in a $25 million equity infusion into the
Company.

    On June 24, 1996, the Company closed a transaction whereby it sold all of
the operational assets of Western Oil Well Service Co. ("Western"), a
wholly-owned subsidiary of the Company, for $3.95 million in cash. Western
provided oil and gas well workover services principally in Montana, Utah and
North Dakota. Pursuant to the sale, the buyer assumed all of Western's existing
leases, primarily for vehicles, which totaled $251,000 at closing. The Company
recorded a gain of $2.8 million in the second quarter of 1996 as a result of the
sale. This gain is not reflected in the attached unaudited pro forma
consolidated financial statements as the gain was non recurring in nature.

    The unaudited pro forma balance sheet assumes the Diamond M acquisition, the
borrowing under the Facility and related events occurred on September 30, 1996.
The sale of the Western assets and the Mergers occurred prior to September 30,
1996 and are included in the historical unaudited balance sheet as of September
30, 1996. The unaudited pro forma statements of operations assume all of the
above transactions occurred on January 1, 1995 for the year ended December 31,
1995 pro forma statement of operations and for the nine months ended September
30, 1996 proforma statement of operations.

    The unaudited pro forma financial statements should be read in conjunction
with the (i) unaudited consolidated financial statements of the Company included
in the Company's report on Form 10-Q as of and for the period ended September
30, 1996, (ii) the financial statements of the Company included in the Company's
report on Form 10-K/A as of and for the year ended December 31, 1995, and (iii)
the Statements of Net Assets of Certain Properties of Diamond M Onshore, Inc. as
of September 30, 1996 (Unaudited) and December 31, 1995 and of Revenues and
Certain Expenses of Certain Properties of Diamond M Onshore, Inc. for the Nine
Months Ended September 30, 1996 (Unaudited) and the Year Ended December 31, 1995
included under Item 7 to this Form 8-K. Pro forma financial data is not
necessarily indicative of future operations of the Company due to numerous
factors, including changes in utilization rates for drilling rigs, changes in
the rates received for drilling services and future equipment sales and
acquisitions. In addition, the results of operations for the nine month period
ending September 30, 1996, if annualized, are not necessarily indicative of
annual results.

                                       11
<PAGE>
                               DI INDUSTRIES, INC.
                 UNAUDITED PRO FORMA CONSOLIDATED BALANCE SHEET
                               September 30, 1996
                                 (In thousands)
<TABLE>
<CAPTION>
                                                                              DIAMOND
                                                                             PRO FORMA
                                                            HISTORICAL      ADJUSTMENTS     PRO FORMA
ASSETS                                                      ----------      ------------    ---------
<S>                                                         <C>             <C>             <C>      
Current assets:
    Cash and cash equivalents ...........................   $  24,081       $  (9,481)(a)   $  12,488
                                                                 --             4,120 (b)          --
                                                                 --            (4,132)(c)          --
                                                                 --            (2,100)(d)          --
    Restricted cash - insurance deposits ................       1,000            --             1,000
    Accounts receivable, net of allowance of$ 2,099 .....      16,936            --            16,936
    Rig inventory and supplies ..........................       2,435            --             2,435
    Assets held for sale ................................       2,299            --             2,299
    Prepaids and other current assets ...................       4,840            --             4,840
                                                            ---------       ---------       ---------
        Total current assets ............................      51,591         (11,593)         39,998
                                                            ---------       ---------       ---------
Property and equipment:
    Land, buildings and improvements ....................       3,296            --             3,296
    Drilling and well service equipment .................      65,958          26,000(d)       91,958
    Furniture and fixtures ..............................       1,118            --             1,118
                                                            ---------       ---------       ---------
                                                               70,372          26,000          96,372
    Less:  Accumulated depreciation and amortization ....     (17,735)           --           (17,735)
                                                            ---------       ---------       ---------
        Net property and equipment ......................      52,637          26,000          78,637
                                                            ---------       ---------       ---------
Other noncurrent assets .................................         277           1,100(d)        1,377
                                                            ---------       ---------       ---------
                                                            $ 104,505       $  15,507       $ 120,012
                                                            =========       =========       =========
LIABILITIES AND STOCKHOLDERS' EQUITY 

Current liabilities:
    Current maturities of long-term debt ................   $   6,942       $  (2,361)(a)   $     581
                                                                 --            (4,000)(c)        --
    Trade accounts payable ..............................       9,460            --             9,460
    Accrued workers' compensation .......................       3,150            --             3,150
    Payroll and related employee costs ..................       2,858            --             2,858
    Customer advances ...................................         623            --               623
    Other accrued liabilities ...........................       3,404             (37)(a)       3,235
                                                                 --              (132)(c)        --
                                                            ---------       ---------       ---------
        Total current liabilities .......................      26,437          (6,530)         19,907
                                                            ---------       ---------       ---------
Long-term debt less current maturities ..................       8,663          (7,083)(a)      26,580
                                                                 --            25,000(d)         --
Other long-term liabilities and minority interest .......       4,157            --             4,157
                                                            ---------       ---------       ---------
Series A Preferred stock - mandatory redeemable .........         764            --               764
                                                            ---------       ---------       ---------
Commitments and contingent liabilities
Stockholders' equity:
    Common stock, $.10 par value; 300,000 shares
        authorized; 117,730 issued and outstanding ......      11,772             175(b)       11,947
    Additional paid-in capital ..........................      88,306           3,945(b)       92,251
    Deficit .............................................     (35,190)           --           (35,190)
    Cumulative translation adjustments ..................        (404)           --              (404)
                                                            ---------       ---------       ---------
        Total stockholders' equity ......................      64,484           4,120          68,604
                                                            ---------       ---------       ---------
                                                            $ 104,505       $  15,507       $ 120,012
                                                            =========       =========       =========
</TABLE>
       SEE ACCOMPANYING NOTES TO UNAUDITED PRO FORMA FINANCIAL STATEMENTS.

                                       12
<PAGE>
                               DI INDUSTRIES, INC.
            UNAUDITED PRO FORMA CONSOLIDATED STATEMENTS OF OPERATIONS
                      For the Year Ended December 31, 1995
                      (In Thousands Except Per Share Data)
<TABLE>
<CAPTION>
                                                      WESTERN      MERGERS                          DIAMOND
                                       HISTORICAL    PRO FORMA    PRO FORMA             HISTORICAL PRO FORMA
                                          DI        ADJUSTMENTS  ADJUSTMENTS PRO FORMA   DIAMOND  ADJUSTMENTS  PRO FORMA
                                      -----------   -----------  ----------- ---------  --------- -----------  --------- 
<S>                                   <C>            <C>          <C>        <C>         <C>      <C>          <C>      
Revenues:
   Contract drilling ...............  $  94,709      $(7,164)(e)  $--        $  87,545   $19,926  $  --        $ 107,471
                                      ---------      -------      -----      ---------   -------  -------      --------- 
Costs and expenses:
   Drilling operations .............     93,825       (6,056)(e)    113(f)      87,882    17,682     --          105,564
   Depreciation, depletion and
      amortization .................      4,832         (339)(e)   --            4,493     1,125    3,132(h)       8,750
   Provision for SFAS #121 asset
      impairment ...................      5,290         --         --            5,290      --       --            5,290
   General and administrative ......      3,555         (300)(e)   --            3,255       467     (217)(i)      3,505
                                      ---------      -------      -----      ---------   -------  -------      --------- 
      Total costs and expenses .....    107,502       (6,695)       113        100,920    19,274    2,915        123,109
                                      ---------      -------      -----      ---------   -------  -------      --------- 
Operating income (loss) ............    (12,793)        (469)      (113)       (13,375)      652   (2,915)       (15,638)
                                      ---------      -------      -----      ---------   -------  -------      --------- 
Other income (expense):
   Interest income .................        292         --         --              292      --       --              292
   Interest expense ................     (1,472)        8(e)       --           (1,464)     --     (1,342)(j)     (2,806)
   Gain (loss) on sale of assets            466       (17)(e)      --              449      --       --              449
   Minority interest and other .....        (56)        --         --              (56)     --       --              (56)
   Gain on currency exchange .......        888         --         --              888      --       --              888
                                      ---------      -------      -----      ---------   -------  -------      --------- 
      Other income (expense), net ..        118           (9)      --              109      --     (1,342)        (1,233)
                                      ---------      -------      -----      ---------   -------  -------      --------- 
Net loss from continuing operations     (12,675)        (478)      (113)       (13,266)      652   (4,257)       (16,871)

Discontinued operations:
   Loss from oil and gas operations          (4)        --         --               (4)     --       --               (4)
   Loss from sale of oil and gas
      properties ...................       (768)        --         --             (768)     --       --             (768)
                                      ---------      -------      -----      ---------   -------  -------      --------- 
   Loss from discontinued
      operations ...................       (772)        --         --             (772)     --       --             (772)
                                      ---------      -------      -----      ---------   -------  -------      --------- 
Net loss before income taxes .......    (13,447)        (478)      (113)       (14,038)      652   (4,257)       (17,643)

Income taxes
                                      ---------      -------      -----      ---------   -------  -------      --------- 
Net loss ...........................  $ (13,447)     $  (478)     $(113)     $ (14,038)  $   652  $(4,257)     $ (17,643)
                                      =========      =======      =====      =========   =======  =======      =========
Loss per common share:
   Loss from continuing
      operations ...................  $   (0.33)                                                               $   (0.14)
   Loss from discontinued
      operations ...................      (0.02)                                                                   (0.01)
                                      ---------                                                                --------- 
Net loss per common share ..........  $   (0.35)                                                               $   (0.15)
                                      =========                                                                ========= 
Weighted average common
   shares outstanding ..............     38,669                                                                  119,267
                                      =========                                                                ========= 
</TABLE>
       SEE ACCOMPANYING NOTES TO UNAUDITED PRO FORMA FINANCIAL STATEMENTS.

                                       13
<PAGE>
                               DI INDUSTRIES, INC.
            UNAUDITED PRO FORMA CONSOLIDATED STATEMENTS OF OPERATIONS
                  For the Nine Months Ended September 30, 1996
                      (In Thousands Except Per Share Data)
<TABLE>
<CAPTION>
                                                    WESTERN       MERGERS                              DIAMOND
                                       HISTORICAL   PRO FORMA    PRO FORMA               HISTORICAL   PRO FORM
                                           DI      ADJUSTMENTS  ADJUSTMENTS   PRO FORMA   DIAMOND   ADJUSTMENTS   PRO FORMA
                                       ----------  -----------  -----------   ---------  ---------- -----------   ---------
<S>                                     <C>         <C>           <C>         <C>         <C>       <C>           <C>      
Revenues:
   Contract drilling ................   $ 61,316    $(3,206)(e)   $--         $ 58,110    $16,380   $  --         $  74,490
                                        --------    -------       -----       --------    -------   -------       --------- 
Costs and expenses:
   Drilling operations ..............     57,205     (3,029)(e)      84(f)      54,260     13,586      --            67,846
   Depreciation, depletion and
      amortization ..................      3,380       (117)(e)    --            3,263        569     2,349(h)        6,181
   General and administrative .......      2,672       (254)(e)    --            2,418        349      (162)(i)       2,605
      Employment severance ..........        602       --          --              602       --        --               602
                                        --------    -------       -----       --------    -------   -------       --------- 
      Total costs and expenses ......     63,859     (3,400)         84         60,543     14,504     2,187          77,234
                                        --------    -------       -----       --------    -------   -------       --------- 
Operating income (loss) .............     (2,543)       194         (84)        (2,433)     1,876    (2,817)         (2,744)
                                        --------    -------       -----       --------    -------   -------       --------- 
Other income (expense):
   Interest income ..................        149       --          --              149       --        --               149
   Interest expense .................       (788)      4(e)        --             (784)      --      (1,102)(j)      (1,886)
   Gain (loss) on sale of assets ....      2,972     (2,775)(e)    --              197       --        --               197
   Minority interest and other ......         51       --          --               51       --        --                51
                                        --------    -------       -----       --------    -------   -------       --------- 
      Other income (expense), net ...      2,384     (2,771)       --             (387)      --      (1,102)         (1,489)
                                        --------    -------       -----       --------    -------   -------       --------- 
Net income (loss) from continuing
   operations .......................       (159)    (2,577)        (84)        (2,820)     1,876    (3,289)         (4,233)

Income taxes ........................       --         --          --             --         --        --              --

Net income (loss) ...................       (159)    (2,577)        (84)        (2,820)     1,876    (3,289)         (4,233)
Series B Preferred stock subscription
   dividend requirement .............       (400)      --           400(g)        --         --        --              --
                                        --------    -------       -----       --------    -------   -------       --------- 
Net income (loss) applicable to
   common stock .....................   $   (559)   $(2,577)      $(316)      $ (2,820)   $ 1,876   $(3,289)      $  (4,233)
                                        ========    =======       =====       ========    =======   =======       ========= 
Net loss per common share ...........   $ (0.01)                                                                  $   (0.04)
                                        ========                                                                  ========= 
Weighted average common shares
   outstanding ......................     48,812                                                                    119,481
                                        ========                                                                  ========= 
</TABLE>
       SEE ACCOMPANYING NOTES TO UNAUDITED PRO FORMA FINANCIAL STATEMENTS.

                                       14
<PAGE>
                               DI INDUSTRIES, INC.
         NOTES TO UNAUDITED PRO FORMA CONSOLIDATED FINANCIAL STATEMENTS

(1) BASIS OF PRESENTATION

     The following sets forth the explanations and assumptions used in preparing
the unaudited pro forma balance sheet of DI Industries, Inc. (the "Company") as
of September 30, 1996 and the unaudited pro forma consolidated statements of
operations for the year ended December 31, 1995 and the nine months ended
September 30, 1996.

     The unaudited pro forma financial statements should be read in conjunction
with the (i) unaudited consolidated financial statements of the Company included
in the Company's report on Form 10-Q as of and for the period ended September
30, 1996, (ii) the financial statements of the Company included in the Company's
report on Form 10-K/A as of and for the year ended December 31, 1995, and (iii)
the Statements of Net Assets of Certain Properties of Diamond M Onshore, Inc. as
of September 30, 1996 (Unaudited) and December 31, 1995 and of Revenues and
Certain Expenses of Certain Properties of Diamond M Onshore, Inc. for the Nine
Months Ended September 30, 1996 (Unaudited) and the Year Ended December 31, 1995
included under Item 7 to this Form 8-K. Pro forma financial data is not
necessarily indicative of future operations of the Company due to numerous
factors, including changes in utilization rates for drilling rigs, changes in
the rates received for drilling services and future equipment sales and
acquisitions. In addition, the results of operations for the nine month period
ending September 30, 1996, if annualized, are not necessarily indicative of
annual results.

(2)  ADJUSTMENT TO THE HISTORICAL FINANCIAL STATEMENTS

     The accompanying unaudited pro forma balance sheet assumes the Diamond M
acquisition, the borrowing under the Facility and related events occurred on
September 30, 1996. The sale of the Western assets and the Mergers occurred
prior to September 30, 1996 and are included in the historical unaudited balance
sheet as of September 30, 1996. The unaudited pro forma statements of operations
assume all of the above transactions occurred on January 1, 1995 for the year
ended December 31, 1995 pro forma statement of operations and for the nine
months ended September 30, 1996 proforma statement of operations.

                                       15
<PAGE>
     The following assumptions and pro forma adjustments have been made to the
historical balance sheet of the Company:

     (a) To reflect the payment of the Nordlandsbanken AS existing credit
         facility and accrued interest.

     (b) To reflect the private placement of 1.75 million shares of the
Company's common stock.

     (c) To reflect the payoff of the $4.0 million short term loan plus accrued
interest.

     (d) To reflect the purchase of the Diamond M assets and the borrowings
         under the new Facility and the payment of the estimated costs of the
         loan transaction which are capitalized as other non current assets.

     The following assumptions and pro forma adjustments have been made to the
historical statements of operations of the Company:

     (e) To reflect the effect on the revenue and expenses items of the Company
         due to the sale of the operational assets of Western.

     (f) To adjust operating expense for the estimated cost to store the rigs
acquired in the Mergers.

     (g) To provide for the liquidation of the Series B preferred stock
         subscription and related dividend requirement in connection with the
         Mergers.

     (h) To reflect the additional depreciation expense associated with the
         acquisition of the Diamond M assets and the amortization of the
         deferred loan costs associated with the Facility. Pro forma
         depreciation was calculated on a straight line basis over the estimated
         useful lives of the property. Pro Forma amortization is calculated on a
         straight line basis over the term of the Facility.

     (i) To reflect the elimination of general and administrative expenses of
         Diamond M allocated by its Parent, Diamond Offshore Drilling, Inc. less
         the additional general and administrative expenses estimated by the
         Company for an additional corporate accounting employee.

     (j) To reflect the estimated additional interest expense associated with
         the borrowings under the Facility to purchase the Diamond M assets less
         the reduction in interest expense for elimination of the $4 million
         dollar term loan and the payment of the Company's term loan with
         Nordlandsbanken AS.

                                       16
<PAGE>
     EXHIBITS

     The following exhibits are filed with the Form 8-K in accordance with the
provisions of Item 601 of Regulation S-K promulgated under the Securities Act of
1933, as amended:

2.1      Asset Purchase Agreement dated November 12, 1996, between Diamond M
         Onshore, Inc. and Drillers, Inc. (the "Asset Purchase Agreement").

2.2      Letter Agreement dated December 31, 1996, between Diamond M Onshore and
         Drillers, Inc. amending the Asset Purchase Agreement.

10.1     Stock Purchase Agreement dated as of December 28, 1996, between DI
         Industries, Inc., and Wexford Special Situations 1996, L.P.,
         Wexford-Euris Special Situations 1996, L.P., Wexford Special Situations
         1996 Institutional, L.P. and Wexford Special Situations 1996 Limited.

99.1     Senior Secured Reducing Revolving Credit Agreement dated as of December
         31, 1996, among DI Industries, Inc. and Drillers, Inc. (as borrowers),
         DI International, Inc. (as guarantor), Bankers Trust Company (as agent
         and administrative agent)and ING (US) Capital Corporation (as
         co-agent).

                            [Signature Page Follows]

                                       17
<PAGE>
                                    SIGNATURE

     Pursuant to the requirements 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.

Date: January 13, 1997

                                            DI INDUSTRIES, INC.

                                            By: /s/ T. SCOTT O'KEEFE
                                                    T. Scott O'Keefe,
                                                    Senior Vice President and 
                                                    Chief Financial Officer

                                       18
<PAGE>
     EXHIBITS

     The following exhibits are filed with the Form 8-K in accordance with the
provisions of Item 601 of Regulation S-K promulgated under the Securities Act of
1933, as amended:

2.1      Asset Purchase Agreement dated November 12, 1996, between Diamond M
         Onshore, Inc. and Drillers, Inc. (the "Asset Purchase Agreement").

2.2      Letter Agreement dated December 31, 1996, between Diamond M Onshore and
         Drillers, Inc. amending the Asset Purchase Agreement.

10.1     Stock Purchase Agreement dated as of December 28, 1996, between DI
         Industries, Inc., and Wexford Special Situations 1996, L.P.,
         Wexford-Euris Special Situations 1996, L.P., Wexford Special Situations
         1996 Institutional, L.P. and Wexford Special Situations 1996 Limited.

99.1     Senior Secured Reducing Revolving Credit Agreement dated as of December
         31, 1996, among DI Industries, Inc. and Drillers, Inc. (as borrowers),
         DI International, Inc. (as guarantor), Bankers Trust Company (as agent
         and administrative agent) and ING (US) Capital Corporation (as
         co-agent).

                                       19

                            ASSET PURCHASE AGREEMENT

                                 BY AND BETWEEN

                             DIAMOND M ONSHORE, INC.

                                       AND

                                 DRILLERS, INC.

                          Dated as of November 12, 1996
<PAGE>
                                TABLE OF CONTENTS

      1.    Purchase and Sale of Assets....................................  1
            1.1   Transfer of Assets.......................................  1
            1.2   Excluded Assets..........................................  3
            1.3   Instruments of Conveyance and Transfer...................  3
            1.4   Further Assurances.......................................  5
            1.5   Liabilities..............................................  5
            1.6   Expenses:  Title Insurance, Consents and Taxes...........  5

      2.    Closing; Purchase Price........................................  5
            2.1   Closing Date.............................................  5
            2.2   Purchase Price and Payment...............................  6
            2.3   Purchase Price Allocation................................  6
            2.4   Prorations...............................................  6

      3.    Representations and Warranties.................................  6
            3.1   Representations and Warranties of the ...................  6
                  (a)   Due Organization; Good Standing and Power..........  7
                  (b)   Validity of Agreement; Approvals; No 
                         Conflict with Instruments.........................  7
                  (c)   Financial Information and Absence of 
                         Certain Changes...................................  7
                  (d)   Title to Properties; Absence of Liens 
                         and Encumbrances..................................  8
                  (e)   Contracts..........................................  8
                  (f)   Permits and Other Data.............................  8
                  (g)   Legal Proceedings..................................  9
                  (h)   Intellectual Property..............................  9
                  (i)   Conduct of Business in Compliance with 
                         Regulatory and Contractual Requirements...........  9
                  (j)   Certain Fees.......................................  9
                  (k)   Environmental, Health and Safety Compliance........  9
                  (l)   Taxes.............................................. 11
                  (m)   Rights of Third Parties............................ 11
                  (n)   Additional Information............................. 11
                  (o)   Labor Matters...................................... 11
                  (p)   Employee Benefit Plans and Arrangements............ 12
                  (q)   Guarantees......................................... 12
                  (r)   Transactions with Affiliates....................... 12
                  (s)   SEC Filings........................................ 12
            3.2   Representations and Warranties of Buyer.................. 13
                  (a)   Due Organization; Good Standing and Power.......... 13
                  (b)   Authorization and Validity of Agreement............ 13
                  (c)   No Approvals or Notices Required; No 
                         Conflict with Instruments......................... 14
                  (d)   Certain Fees....................................... 14

                                        i
<PAGE>
            3.3   Survival of Representations and Warranties............... 14
            3.4   Scope of Representations of the Company.................. 14

      4.    Covenants; Actions Prior to Closing............................ 15
            4.1   Access to Information.................................... 15
            4.2   Conduct of the Business.................................. 15
            4.3   Survey and Title Insurance Commitment.................... 16
            4.4   Further Actions.......................................... 17
            4.5   Notification............................................. 17
            4.6   No Inconsistent Action................................... 18
            4.7   Acquisition Proposals.................................... 18
            4.8   Hart-Scott-Rodino Act.................................... 18
            4.9   Public Announcements..................................... 18
            4.10  Rig Loss................................................. 19
            4.11  Performance Bonds........................................ 19
            4.12  Environmental Matters.................................... 19

      5.    Conditions Precedent........................................... 20
            5.1   Conditions Precedent to Obligations of All Parties....... 20
                  (a)   No Governmental Action............................. 20
                  (b)   Termination under Hart-Scott-Rodino Act............ 20
            5.2   Conditions Precedent to Obligations of Buyer............. 20
                  (a)   Accuracy of Representations and Warranties......... 20
                  (b)   Performance of Agreements.......................... 20
                  (d)   Actions and Proceedings............................ 20
                  (e)   Licenses and Consents.............................. 21
                  (f)   Environmental Study................................ 21
                  (g)   Opinion of Counsel of the Company.................. 21
                  (h)   Operation.......................................... 21
                  (i)   Material Adverse Change............................ 21
                  (j)   Rig Audit.......................................... 21
                  (k)   Payoff Letters..................................... 21
                  (l)   Financial Audit.................................... 21
            5.3   Conditions Precedent to the Obligations of the Company... 22
                  (a)   Accuracy of Representations and Warranties......... 22
                  (b)   Performance of Agreements.......................... 22
                  (c)   Actions and Proceedings............................ 22
                  (d)   Opinion of Counsel to Buyer........................ 22
            5.4   Deemed Waiver of  Conditions Precedent................... 22

      6.    Employees...................................................... 22
            6.1   Employment............................................... 22
            6.2   No Buyer Liability....................................... 23

                                       ii
<PAGE>
      7.    Termination.................................................... 23
            7.1   General.................................................. 23
            7.2   No Liabilities in Event of Termination................... 23
            7.3   Failure to Close......................................... 23

      8.    Covenants; Action Subsequent to Closing........................ 24
            8.1   Post Closing Consent..................................... 24
            8.2   Access to Books and Records.............................. 24
            8.3   Mail..................................................... 25
            8.4   New Iberia Facility...................................... 25
            8.5   Parent's and Company's Covenants Not to Compete.......... 25

      9.    Indemnification................................................ 26
            9.1   Indemnification by the Company........................... 26
            9.2   Indemnification by Buyer................................. 26
            9.3   Monetary Limit on Indemnification Liability.............. 27
            9.4   Indemnification Procedures............................... 27
            9.5   Applicability of Indemnification Obligation.............. 28

      10.   Miscellaneous.................................................. 28
            10.1  Payment of Certain Fees and Expenses..................... 28
            10.2  Notices.................................................. 28
            10.3  Entire Agreement......................................... 29
            10.4  Binding Effect; Benefit.................................. 29
            10.5  Assignability............................................ 29
            10.6  Amendment; Waiver........................................ 30
            10.7  Limitation on Interest................................... 30
            10.8  Section Headings; Index.................................. 30
            10.9  Severability............................................. 30
            10.10 Counterparts............................................. 30
            10.11 Applicable Law........................................... 30
            10.12 Solicitation of Employees................................ 30
            10.13 No Third Party Beneficiaries............................. 31
            10.14 Survival................................................. 31
            10.15 DTPA Waiver.............................................. 31

      11.   Definitions.................................................... 31
            11.1  Defined Terms............................................ 31
            11.2  Certain Additional Defined Terms......................... 33
            11.3  References............................................... 34

      12.   DODI Guaranty.................................................. 34
            12.1  Guaranty................................................. 34
            12.2  Guaranty Unconditional................................... 34

                                       iii
<PAGE>
            12.3  Waivers of DODI.......................................... 35
            12.4  Discharge Only Upon Performance in Full; 
                    Reinstatement in Certain Circumstances................. 35
            12.5  Subrogation.............................................. 35

      13.   DI Guaranty.................................................... 35
            13.1  Guaranty................................................. 35
            13.2  Guaranty Unconditional................................... 36
            13.3  Waivers of DI............................................ 36
            13.4  Discharge Only Upon Performance in Full; 
                    Reinstatement in Certain Circumstances................. 36
            13.5  Subrogation.............................................. 36

                                       iv
<PAGE>
                   LIST OF SCHEDULES AND EXHIBITS TO AGREEMENT

                                    SCHEDULES

Schedule 1.1(a)   -     Real Estate

Schedule 1.1(b)   -     Rigs

Schedule 1.1(c)   -     Vehicles

Schedule 1.1(e)   -     Drill String

Schedule 1.1(h)   -     Contracts

Schedule 1.1(i)   -     Permits

Schedule 1.1(j)   -     Intellectual Property

Schedule 2.3      -     Purchase Price Allocation

Schedule 3.1(b)   -     Consents and Approvals

Schedule 3.1(d)   -     Liens and Encumbrances

Schedule 3.1(e)   -     Contracts

Schedule 3.1(f)   -     Permits and Other Data

Schedule 3.1(g)   -     Legal Proceedings

Schedule 3.1(h)   -     Intellectual Property

Schedule 3.1(i)   -     Conduct of Business in Compliance with Regulatory and
                        Contractual Requirements

Schedule 3.1(k)   -     Environmental Compliance

Schedule 3.1(n)   -     Additional Information

Schedule 3.1(p)   -     Employee Benefit Plans

Schedule 3.1(q)   -     Guaranty

Schedule 3.1(r)   -     Transactions with Affiliates

Schedule 3.2(c)   -     Buyer Consents

Exhibit A         -     Warranty Deed

                                        v
<PAGE>
Exhibit B         -     General Conveyance

Exhibit C         -     Opinion of Counsel to Company

Exhibit D         -     Opinion of Counsel to Buyer

Exhibit E         -     Escrow Agreement

                                       vi
<PAGE>
                            ASSET PURCHASE AGREEMENT

      This Asset Purchase Agreement (this "Agreement") is made and entered into
as of November 12, 1996 by and between Diamond M Onshore, Inc., a Delaware
corporation (the "Company") and Drillers, Inc., a Texas corporation ("Buyer").


                                R E C I T A L S:

      1. The Company is engaged in the business (the "Business") of onshore oil
and gas well drilling; and

      2. The Company desires to sell to Buyer substantially all of the Company's
assets, which are more fully described in Section 1.1 hereof, and Buyer desires
to acquire such assets in consideration of the payment by Buyer of the purchase
price provided for herein, all upon the terms and subject to the conditions
hereinafter set forth.

                                   AGREEMENT

      In consideration of the premises and of the respective representations,
warranties, covenants, agreements and conditions of the parties contained
herein, it is hereby agreed as follows:

1.    PURCHASE AND SALE OF ASSETS.

      1.1 TRANSFER OF ASSETS. On the terms and subject to the conditions set
forth in this Agreement, on the Closing Date, the Company shall sell, convey,
assign, transfer and deliver to Buyer, and Buyer shall purchase and acquire from
the Company (except as provided in Section 1.2 hereof) all of the following
assets, rights and properties:

            (a) a tract of land located in Alice, Texas as more particularly
      described in SCHEDULE 1.1(A) hereto (such property being hereinafter
      collectively referred to as the "Real Estate");

            (b) The ten drilling rigs known as Diamond M Rigs 840, 851, 859,
      860, 861, 862, 863, 864, 865 and 866, together with all the drilling
      machinery and equipment listed on SCHEDULE 1.1(B) hereto (collectively,
      the "Rigs");

            (c) All trucks and other vehicles listed on SCHEDULE 1.1(C) hereto,
      together with all binders, chains, winches, rigging and other equipment
      associated therewith used by the Company in moving the Rigs (collectively,
      the "Vehicles");
<PAGE>
            (d) All the spare parts and inventory of the Company on the Rigs and
      on the Real Estate (collectively, the "Inventory");

            (e) All the drill pipe and drill collars set forth on SCHEDULE
      1.1(E) hereto (the "Drill String");

            (f) All warranties and guarantees, if any, express or implied,
      existing for the benefit of the Company in connection with the Rigs,
      Vehicles, Inventory and Drill String to the extent assignable;

            (g) All personnel, safety, maintenance, environmental, and other
      policy manuals for onshore operations, catalogs, research material,
      technical information, software technology relative to the above and all
      specifications, designs and drawings owned by and in possession of the
      Company and used in the conduct of the Business;

            (h) The rights of the Company affecting the Business under all
      contracts, agreements and arrangements listed on SCHEDULE 1.1(H) hereto
      (collectively, the "Contracts");

            (i) The rights of the Company under all Permits relating to the
      development, use, maintenance or occupation of the Real Estate or the
      conduct of the Business listed on SCHEDULE 1.1(I) hereto, to the extent
      that such permits are transferable;

            (j) All Intellectual Property of the Company, and any goodwill
      associated therewith, including all rights associated with all personnel,
      safety, maintenance, environmental and other policy manuals conveyed to
      Buyer, and the assets identified on SCHEDULE 1.1(J) hereto, but excluding
      however the title of the Company in and to the names "Diamond", "Diamond
      M", and any derivatives thereof (except that Buyer shall, as expeditiously
      as possible but in any event no later than 30 days after the Closing,
      remove all signage relating to the name or trademark of the Company from
      any of the Assets);

            (k) All personnel files and other materials relating to employees of
      the Company who may be offered employment by Buyer including those
      contemplated by Section 6 hereof;

            (l) All records of compliance and non-compliance with the laws,
      regulations, ordinances and orders applicable to the Real Estate or the
      Business;

            (m) All blueprints, specifications, designs and drawings associated
      solely and exclusively with the Real Estate, Rigs, Vehicles, Inventory and
      Drill String, to the extent owned by the Company and in its possession and
      control;

            (n)   All current operating budgets for the Company or the Business;

                                        2
<PAGE>
            (o) All personal property of the Company located at the Company's
      facility in Alice, Texas;

            (p) The Company's mailing address and telephone numbers in Alice,
      Texas; and

            (q) Customer advances and prepayments under drilling contracts
      received by the Company prior to Closing for drilling work to be performed
      after Closing.

The assets described in this Section 1.1 as being sold, conveyed, assigned,
transferred and delivered to Buyer hereunder are sometimes hereinafter referred
to collectively as the "Assets".

      1.2 EXCLUDED ASSETS. It is expressly understood and agreed that the Assets
shall not include the following:

            (a) Cash and cash equivalents or similar type investments, such as
      certificates of deposit, Treasury bills and other marketable securities
      and insurance premium prepayments;

            (b) The accounts receivable of the Company as of the Closing Date,
      all rights to payment under any assigned Contracts arising out of work
      performed by the Company prior to the Closing Date and all rights arising
      prior to the Closing Date under warranties and guarantees insofar as such
      rights affect the exposure to Company for any Retained Liabilities;

            (c) Claims for refunds of taxes and other governmental charges to
      the extent such refunds relate to periods prior to the Closing Date;

            (d) All rights, claims or causes of action of the Company arising or
      relative to periods prior to the Closing;

            (e) The assets of any employee benefit plan maintained by the
      Company or any of its Affiliates; and

            (f) The original corporate minute books, stock books, financial
      records, tax returns and corporate policies and procedures manuals of the
      Company.

To implement the provisions of Section 1.2(b), the Company shall prepare
invoices for all day rate drilling contracts for periods up to the Closing Date
and the Buyer shall prepare invoices for periods after the Closing. With respect
to footage basis drilling contracts ongoing on the Closing Date, the Buyer shall
conduct the accounting for such contracts in cooperation with the Company
through the completion of the relevant well, and shall invoice the customer on
behalf of both parties. The Buyer shall determine the profits for the well
(revenue for the well, net of expenses other than any g & a allocations) and
remit to the Company its pro rata portion based upon footage completed before
and after the Closing Date.

      1.3 INSTRUMENTS OF CONVEYANCE AND TRANSFER. On the Closing Date, the
Company shall deliver or cause to be delivered to Buyer the following:

            (a) A duly executed and acknowledged special warranty deed in the
      form attached hereto as EXHIBIT A and an owner's policy of title insurance
      issued by Border Abstract & Title Co., Inc. (the "Title Company") in the
      name of Buyer insuring the fee estate in the Real Estate. The owner's
      policy of title insurance shall be for an amount

                                        3
<PAGE>
      which is consistent with the allocation provided for in Section 2.3 hereto
      and shall be issued subject only to the Permitted Encumbrances; provided,
      however, that (i) there shall be no exception pertaining to discrepancies,
      conflicts or shortages, (ii) such policy shall have "none of record"
      endorsed thereon with respect to restrictions (except for restrictions
      that are Permitted Encumbrances), (iii) there shall be no exception for
      rights of parties in possession, (iv) any exception for taxes shall be
      limited to the current tax period in which the Closing occurs, marked "not
      yet due and payable" and (v) such other changes as agreed upon by the
      Title Company; provided, that all additional premiums associated with the
      foregoing items (i) and (iii) shall be borne by Buyer. The Company shall
      deliver such deed to the Title Company in a timely manner so as to permit
      the filing and recording thereof on the Closing Date and otherwise
      contemporaneously with the issuance of such title insurance policy;

            (b) A general conveyance in the form attached hereto as EXHIBIT B
      transferring to Buyer good and marketable title to all of the tangible
      personal property included in the Assets, subject only to Permitted
      Encumbrances;

            (c) An assignment or sublease to Buyer of the Company's right, title
      and interest in each of the Contracts referred to in Section 1.1(h)
      hereof;

            (d) All appropriate documents for the assignment as of the Closing
      Date of the Company's rights under the licenses, permits and franchises
      referred to in Section 1.1(i) hereof and of all registrations, permits,
      licenses, equipment or motor vehicle leasing agreements, motor vehicle and
      rolling stock titles, rights under sales and/or purchase orders and rights
      under all other Contracts constituting a part of the Assets;

            (e) All appropriate documents for the assignment as of the Closing
      Date of all patents, trademarks, trade names and other Intellectual
      Property referred to in Section 1.1(j) hereof;

            (f) Originals of all of the Contracts, commitments, books, records,
      files and other data (except any such items that are directly related to
      Retained Liabilities) that (i) are included in the Assets or (ii) relate
      to or affect the Assets as of the time of Closing and are reasonably
      necessary for the continued conduct of the Business; and

            (g) Such other instruments of transfer and assignment in respect of
      the Assets as Buyer shall reasonably require and as shall be consistent
      with the terms and provisions of this Agreement.

Prior to the Closing Date, the Company will take such reasonable steps as may be
requisite or appropriate so that no later than the close of business on the
Closing Date, Buyer will be placed in actual possession and control of all of
the Assets.

                                        4
<PAGE>
      1.4 FURTHER ASSURANCES. From time to time after the Closing, the Company
will execute and deliver, or cause to be executed and delivered, without further
consideration, such other instruments of conveyance, assignment, transfer and
delivery and will take such other actions as Buyer may reasonably request in
order to transfer, convey, assign and deliver to Buyer, and to place Buyer in
possession and control of any of the Assets or to enable Buyer to exercise and
enjoy all rights and benefits of the Company with respect thereto.

      1.5   LIABILITIES.

            (a) All liabilities of the Company existing on or arising prior to
      the Closing Date, known or unknown, fixed or contingent, are retained by
      the Company except for those arising from the condition of the Rigs, Real
      Estate, Vehicles, Inventory, or Drill String (the "Retained Liabilities").

            (b) Notwithstanding anything herein to the contrary, the Company
      shall not assume any liability or obligation arising out of any breach by
      the Buyer, including Buyer's failure to perform or negligent or improper
      performance, of any assigned Contracts after the Closing.

            (c) All liabilities relating to the ownership and operation of the
      Assets including, with respect to the condition of the Assets, arising
      from and after the Closing Date, known or unknown, fixed or contingent,
      are assumed by Buyer (the "Assumed Liabilities").

      1.6 EXPENSES: TITLE INSURANCE, CONSENTS AND TAXES. The Company shall pay,
or cause to be paid, the costs and expenses of obtaining the commitment for
title insurance and all premiums with respect to the owner's policy of title
insurance contemplated by and described in Section 1.3(a) hereof, except for the
additional premiums under Section 1.3(a)(i) and (iii). Buyer shall assume
responsibility for and shall bear and pay all state sales and use taxes
resulting from the consummation of the transactions contemplated hereby and
Company and Buyer agree to cooperate to obtain all available exemptions from
such taxes. In addition, Buyer shall reimburse the Company for all fees, costs
and expenses incurred by the Company in respect of Deloitte & Touche, L.L.P.,
independent public accountants, in connection with the preparation of audited
financial statements, if any, of the Company required by Rule 3-05 of the rules
and regulations of the Securities and Exchange Commission or as required by DI
Industries, Inc.'s underwriters in connection with the sale of DI Industries,
Inc.'s securities. The Company agrees to execute a management representation
letter in connection with such audited financial statements.

2.    CLOSING; PURCHASE PRICE.

      2.1 CLOSING DATE. The closing with respect to the transactions provided
for in this Agreement (the "Closing") shall take place at a time and place to be
mutually agreed to by the parties, within five business days after the
satisfaction or waiver of all of the conditions precedent

                                        5
<PAGE>
described in Section 5. The actual time and date of the Closing are herein
called the "Closing Date".

      2.2   PURCHASE PRICE AND PAYMENT.

            (a) As consideration for the Assets, and subject to the terms and
      conditions of this Agreement, Buyer shall pay to the Company a total of
      US$26,000,000 (the "Purchase Price").

            (b) The Purchase Price shall be paid in cash on the Closing Date to
      or upon the order of the Company in immediately available Houston, Texas
      funds:

                      (i) by the Escrow Agent's delivery of the Escrow Fund to
            the Company;

                      (ii) by the Buyer's delivery of the portion of the
            Purchase Price allocated to the Real Estate under Section 2.2(a) to
            the Title Company for distribution to the Company; and

                      (iii) by the Buyer's delivery of the balance of the
            Purchase Price to the Company.

      2.3 PURCHASE PRICE ALLOCATION. Attached hereto as SCHEDULE 2.3 is an
allocation of the Purchase Price among the Assets. As soon as practicable after
the Closing Date, the Company and Buyer shall jointly prepare IRS Form 8594 to
report the allocation of the Purchase Price among the Assets, consistent with
SCHEDULE 2.3. Each party hereto agrees not to assert, in connection with any tax
return, tax audit or similar proceeding, any allocation that differs from that
set forth in such Form 8594. In the event it is necessary to allocate the
Purchase Price among the Assets for any reason under this Agreement for
determination of value for loss or damage of such Asset, the value of the
Premium for Going Concern set out in Schedule 2.3 shall be generally allocated
88% to the Rigs and 12% to the Hauling Trucks and thereafter specifically to the
Asset to which the allocation is allocable based on its proportionate value set
out in Schedule 2.3.

      2.4 PRORATIONS. Ad valorem and similar taxes and assessments relating to
the Assets shall be prorated between Buyer and the Company as of the Closing
Date based upon estimates of the amount of such taxes and assessments that will
be due and payable on the Assets during the year during which the Closing Date
occurs. As soon as the amount of actual taxes and assessments is known, Buyer
and the Company shall readjust the amount to be paid by each party with the
result that the Company shall pay for those taxes and assessments attributable
to the period of time up to and including the Closing Date and Buyer shall pay
for those attributable to the period thereafter.

3.    REPRESENTATIONS AND WARRANTIES.

      3.1 REPRESENTATIONS AND WARRANTIES OF THE COMPANY. The Company represents
and warrants to Buyer as follows:

                                        6
<PAGE>
            (a) DUE ORGANIZATION; GOOD STANDING AND POWER. The Company is a
      corporation duly organized, validly existing and in good standing under
      the laws of the state of Delaware. The Company has the corporate power and
      authority to own, lease and operate the Assets and to conduct the
      Business. The Company is duly authorized, qualified or licensed to do
      business as a foreign corporation and is in good standing in each
      jurisdiction in which its right, title or interest in or to any of the
      Assets, or the conduct of the Business, requires such authorization,
      qualification or licensing, except where the failure to so qualify or to
      be in good standing in such other jurisdictions would not have a material
      adverse effect on any of the Assets, the Business or the results of
      operations of the Company. No actions or proceedings to dissolve the
      Company are pending.

            (b) VALIDITY OF AGREEMENT; APPROVALS; NO CONFLICT WITH INSTRUMENTS.
      The execution, delivery and performance of this Agreement by the Company
      has been duly authorized by all requisite action on its part. No other
      corporate action is necessary for the authorization, execution, delivery,
      and performance by the Company of this Agreement and the consummation by
      the Company of the transactions contemplated hereby. This Agreement has
      been duly executed and delivered by the Company and constitutes a legal,
      valid and binding obligation of the Company, enforceable against it in
      accordance with its terms, except as the same may be limited by
      bankruptcy, insolvency or other similar laws affecting creditors' rights
      generally and by general equity principles. Except as described in
      SCHEDULE 3.1(B) hereto the execution, delivery and performance of this
      Agreement by the Company and the consummation by it of the transactions
      contemplated hereby (i) will not violate (with or without the giving of
      notice or the lapse of time or both) or require any consent, approval,
      filing or notice under, any provision of any law, rule or regulation,
      court order, judgment or decree applicable to the Company; (ii) will not
      result in the creation of any Encumbrance (other than any Permitted
      Encumbrances) on the Assets under, conflict with, or result in the breach
      or termination of any provision of, or constitute a default under, or
      result in the acceleration of the performance of the obligations of the
      Company under, or result in the creation of a lien, charge or Encumbrance
      (other than Permitted Encumbrances) upon any portion of the assets of the
      Company pursuant to, the charter or by-laws of the Company, or any
      indenture, mortgage, deed of trust, lease, licensing agreement, contract,
      instrument or other agreement to which the Company is a party or by which
      it or any of its assets is bound or affected; and (iii) will not require
      any consent, approval, waiver, order or authorization of, or registration,
      declaration or filing with, any Governmental Entity, except for (x) the
      filing pursuant to the HSR Act and (y) any necessary consents to transfer
      or assign Permits, to the extent the same are transferable or assignable.

            (c) FINANCIAL INFORMATION AND ABSENCE OF CERTAIN CHANGES. The
      Company has delivered to Buyer accurate and complete copies of (i) the
      Company's unaudited consolidated balance sheets as of December 31, 1995,
      and the related unaudited consolidated statements of income and
      stockholders' equity for the year then ended, prepared in conformity with
      GAAP, and (ii) the Company's unaudited consolidated

                                        7
<PAGE>
      balance sheet as of September 30, 1996 and the related unaudited
      statements of income and stockholders' equity for the nine month period
      then ended, all certified by the Company's Controller (collectively, the
      "Financial Statements"). The Company has also delivered to Buyer accurate
      and complete copies of its current operating budget and all drafts and
      supporting material for the Company's 1997 operating budget. The Financial
      Statements (i) represent actual bona fide transactions, (ii) have been
      prepared from the books and records of the Company in conformity with GAAP
      applied on a basis consistent with preceding years throughout the periods
      involved, and (iii) accurately, completely and fairly present the
      Company's consolidated financial position as of the respective dates
      thereof and its consolidated results of operations for the periods then
      ended, except that the September 30, 1996 financial statements are subject
      to normal year-end adjustments consistent with past practice, which will
      not be material in the aggregate.

            (d) TITLE TO PROPERTIES; ABSENCE OF LIENS AND ENCUMBRANCES. The
      Company owns (except as described in SCHEDULE 3.1(D) hereto) good and
      marketable title to all of the Assets, free and clear of all Encumbrances,
      and other restrictions of any kind and nature, other than Permitted
      Encumbrances.

            (e) CONTRACTS. SCHEDULE 3.1(E) lists all contracts to which the
      Company is a party which are Assets or affect the operation of the Assets.
      The Company has made available to the Buyer a correct copy of each
      Contract that is in the Company's possession. With respect to each
      Contract, to the best of Company's knowledge: (A) the Contract is legal,
      valid, binding, enforceable, and in full force and effect (except as to
      enforceability of indemnity provisions); (B) the Contract will continue to
      be legal, valid, binding, enforceable, and in full force and effect on
      identical terms following the consummation of the transactions
      contemplated hereby (including the assignments and assumptions referred to
      in Section 1.3 above), except as to enforceability of indemnity
      provisions; (C) no party is in breach or default, and no event has
      occurred which with notice or lapse of time would constitute a breach or
      default, or permit termination, modification, or acceleration, under the
      Contract, which breach or default would have a material adverse effect on
      the Buyer under such Contract; and (D) no party has repudiated any
      provision of the Contract, which repudiation would have a material adverse
      effect on the Buyer under such Contract.

            (f) PERMITS AND OTHER DATA. SCHEDULE 3.1(F) hereto contains a
      complete and correct list of all Permits (other than sales and use tax
      Permits and franchise tax registrations). True and complete copies of all
      documents (including all amendments thereto) referred to in SCHEDULE
      3.1(F) hereto have been delivered to or made available for inspection by
      Buyer. To the knowledge of Company, all Permits are in full force and
      effect and are valid and enforceable in accordance with their respective
      terms, except where the failure to be in full force and effect and valid
      and enforceable would not in the aggregate have an adverse effect on the
      Assets or on the Company's results of operations. To the knowledge of the
      Company, the Company and its respective Affiliates are not in breach or
      default in the performance of any material obligation thereunder and no
      event

                                        8
<PAGE>
      has occurred or has failed to occur whereby any of the other parties
      thereto have been or will be released therefrom or will be entitled to
      refuse to perform thereunder. Except as set forth in SCHEDULE 3.1(F)
      hereof, to the knowledge of Company, there are no Permits to which the
      Company or any of Affiliates is a party which are material to the
      ownership of any of the Company's Assets or to the conduct of the
      Business.

            (g) LEGAL PROCEEDINGS. Except as described in SCHEDULE 3.1(G)
      hereto, (i) there is no litigation, proceeding, claim or governmental
      investigation pending or, to the knowledge of the Company, threatened
      seeking relief or damages which, if granted, would adversely affect the
      Assets, or the ability of Buyer to use and operate the Assets of the
      Company or which would prevent the consummation of the transactions
      contemplated by this Agreement and (ii) the Company has not been charged
      with any violation of or, to the knowledge of the Company, threatened with
      a charge or violation of, nor is the Company aware of any facts or
      circumstances that, if discovered by third parties, could give rise to a
      charge or a violation of, any provision of Applicable Law or regulation
      which charge or violation, if determined adversely to the Company, would
      adversely affect the Business or the results of operations of the Company
      or that might reasonably be expected to affect the right of Buyer to own
      the Assets or operate the Business after the Closing Date in substantially
      the manner in which it is currently operated.

            (h) INTELLECTUAL PROPERTY. Except for the Intellectual Property set
      forth on SCHEDULE 3.1(H) hereto, the Company does not own, hold, use, or
      have pending any material Intellectual Property in connection with the
      operation of its Assets and Business.

            (i) CONDUCT OF BUSINESS IN COMPLIANCE WITH REGULATORY AND
      CONTRACTUAL REQUIREMENTS. Except as described on SCHEDULE 3.1(I) hereto,
      the Company has conducted the Business so as to comply with all Applicable
      Laws, Permits, licenses, know-how or other proprietary rights of others,
      the failure to comply with which would individually or in the aggregate
      have a material adverse effect on the Business or the results of
      operations of the Company.

            (j) CERTAIN FEES. Neither Company nor any of its officers, directors
      or employees has employed any broker or finder or incurred any other
      liability for any brokerage fees, commissions or finders' fees in
      connection with the transactions contemplated hereby, other than the fees
      and expenses payable to Howard, Weil, Labouisse, Friedrichs which shall be
      paid by the Company.

            (k) ENVIRONMENTAL, HEALTH AND SAFETY COMPLIANCE. Except as described
      on SCHEDULE 3.1(K) hereto, and except where the failure of any of the
      following statements to be true would result in a material adverse effect
      on the Assets and Business taken as a whole, for the period beginning with
      the time at which the Company acquired the Assets:

                                        9
<PAGE>
                      (i) the Company is, and has continuously been, in
            compliance with all Environmental Laws;

                      (ii) all material notices, Permits, or similar
            authorizations, if any, required to be obtained or filed under any
            Environmental Law in connection with the operation of the Business
            have been obtained or filed;

                      (iii) there are no past, pending or threatened
            investigations, proceedings or claims against the Company that are
            known to the Company relating to the presence, release or
            remediation of any Hazardous Material or for non-compliance with any
            Environmental Law;

                      (iv) Hazardous Materials have not been treated, stored or
            disposed of on, to or from any property relating in any way to the
            Company or that is or was owned or leased by the Company;

                      (v) none of the properties owned, leased or operated by
            the Company has been used by the Company as landfill or waste
            disposal sites or contain any underground storage tanks placed
            therein or thereon by the Company;

                      (vi) no conditions or circumstances are known to the
            Company to exist or to have existed with respect to the Company,
            including without limitation the off-site disposal of Hazardous
            Materials, that could impose any liability on Buyer with respect to
            any Environmental Law;

                      (vii) the Company has not received any notice or claim,
            and is not aware of any facts suggesting, that the Company is or may
            be liable to any person as a result of any Hazardous Material
            generated, treated or stored on the Real Estate or discharged,
            emitted, released or transported from the Real Estate;

                      (viii) no conditions or circumstances are known by the
            Company to exist or to have existed, and no activities are known by
            the Company to be occurring or to have occurred, that are resulting
            or have resulted in the exposure of any person or property to a
            Hazardous Material such that the owner of the Real Estate or of the
            Business may in the future be liable to such persons or to the
            owners of such property for personal or other injuries or damages
            resulting from such exposure; and

                      (ix) there are no federal or state air emission credits or
            air or water discharge Permits related to the Real Estate.

      For purposes of this Agreement, the term "Environmental Laws" shall mean,
      as to any given asset or operation of the Company, all applicable laws,
      statutes, ordinances, rules and regulations of any Governmental Entity
      pertaining to protection of the environment

                                       10
<PAGE>
      in effect as of the Closing Date. For purposes of this Agreement, the term
      "Hazardous Material" shall mean any substance which is listed or defined
      as a hazardous substance, hazardous constituent or solid waste pursuant to
      any Environmental Law.

            (l) TAXES. The Company has caused to be timely filed with
      appropriate federal, state, local and other Governmental Entities all Tax
      Returns required to be filed with respect to the Company or the conduct of
      the Business and has paid, caused to be paid, or adequately reserved in
      the Financial Statements all Taxes due or claimed to be due from or with
      respect to such Tax Returns, unless such failure to file, to pay or cause
      to be paid or adequately reserved in the Financial Statements would not
      have a material adverse effect on the financial condition of the Company
      or the Assets.

            (m) RIGHTS OF THIRD PARTIES. Except as specifically set forth on one
      or more of the Schedules hereto, the Assets are transferable and
      assignable to Buyer as contemplated by this Agreement without the waiver
      of any right of first refusal or the consent of any other party being
      obtained, and there exists no preferential right of purchase in favor of
      any person with respect to any of the Assets or the Business.

            (n) ADDITIONAL INFORMATION. SCHEDULE 3.1(N) hereto contains accurate
      lists and summary descriptions of the following:

                      (i) the names and titles of and current hourly rates for
            all employees of the Company and employees of Company Affiliates
            located in Alice, Texas;

                      (ii) all names under which the Company has conducted any
            business or which any of them has otherwise used; and

                      (iii) a listing of all performance and similar bonds and
            letters of credit currently posted by, or any certificate of
            financial responsibility or similar evidence of financial
            accountability obtained or procured by, the Company for the purpose
            of operating the Assets or otherwise conducting the Business.

            (o) LABOR MATTERS. The Company has not suffered any strike,
      slowdown, picketing or work stoppage by any union or other group of
      employees. The Company is not a party to any collective bargaining
      agreement; no such agreement determines the terms and conditions of
      employment of any employee of the Company; no collective bargaining agent
      has been certified as a representative of any of the employees of the
      Company; and no representation campaign or election is now in progress
      with respect to any of the employees of the Company. The Company has
      complied in all material respects with all laws relating to the employment
      of labor in the conduct of the Business, including provisions thereof
      relating to wages, hours, equal opportunity and the payment of pension
      contributions, social security and other taxes.

                                       11
<PAGE>
            (p) EMPLOYEE BENEFIT PLANS AND ARRANGEMENTS. SCHEDULE 3.1(P) hereto
      lists all written employee benefit plans and collective bargaining, labor
      and employment agreements and severance agreements or other similar
      arrangements (together with all documents or instruments establishing or
      constituting any related trust, annuity contract or other funding
      instrument), and whether or not legally enforceable, to which the Company
      is (or ever has been) a party or by which the Company is (or ever has
      been) bound, including (1) any profit-sharing, deferred compensation,
      bonus, stock option, stock purchase, pension, retainer, consulting,
      retirement, severance, or incentive compensation plan, agreement or
      arrangement, (2) any welfare benefit plan, agreement or arrangement or any
      plan, agreement or arrangement providing for "fringe benefits" or
      perquisites to employees, officers, directors or agents, including
      benefits relating to automobiles, clubs, vacation, child care, parenting
      or maternity leave, sabbaticals, sick leave, medical expenses, dental
      expenses, disability, accidental death or dismemberment, hospitalization,
      life insurance and other types of insurance, (3) any employment agreement,
      or (4) any other "employee benefit plan" (within the meaning of Section
      3(3) of ERISA) (each, a "Benefit Plan"). Each Benefit Plan has been
      maintained and contributed to in compliance with the requirements of
      Applicable Law, except for such failures to maintain or contribute that
      would not, in the aggregate, have a material adverse effect on the
      financial condition of the Company or on the Assets. The Company has paid
      and discharged when due all obligations and liabilities arising under such
      Benefit Plans and Applicable Law of a character which, if not paid or
      discharged, might result in the imposition of an Encumbrance (other than a
      Permitted Encumbrance) or the assertion of a liability enforceable against
      the Assets or the Buyer, which could have a material adverse effect on the
      financial condition of the Buyer or the Assets.

            (q) GUARANTEES. Except as disclosed on SCHEDULE 3.1(Q), the Company
      is not a guarantor or otherwise is liable for any liability or obligation
      (including indebtedness) of any other person.

            (r) TRANSACTIONS WITH AFFILIATES. Except as disclosed on SCHEDULE
      3.1(R), no shareholder, director or officer of the Company or any
      associate of any such shareholder, director or officer is currently,
      directly or indirectly, a party to any transaction with the Company,
      including any agreement, arrangement or understanding, written or oral,
      providing for the employment of, furnishing of services by, rental of real
      or personal property from, or otherwise requiring payments to any such
      shareholder, director, officer or associate.

            (s) SEC FILINGS. The Company has heretofore made available to Buyer
      all reports, registration statements and other filings filed by Diamond
      Offshore Drilling, Inc. ("DODI") with the Securities and Exchange
      Commission since January 1, 1995 (the "DODI Commission Filings"). As of
      their respective dates, the DODI Commission Filings did not contain any
      untrue statement of a material fact or omit to state any material fact
      required to be stated therein or necessary in order to make the statements
      contained therein, in light of the circumstances under which they were
      made, not misleading. Each

                                       12
<PAGE>
      of the DODI Commission Filings was prepared in material compliance with
      all Applicable Laws. The audited consolidated financial statements and
      unaudited consolidated interim financial statements of DODI included in
      the DODI Commission Filings present fairly, in conformity with generally
      accepted accounting principles applied on a consistent basis (except as
      may be indicated in the notes thereto), the consolidated financial
      position of DODI as of the dates thereof and its consolidated results of
      operations and cash flows for the periods then ended (subject to normal
      year-end audit adjustments in the case of any unaudited interim financial
      statements). Since September 30, 1996, there has not been any material
      adverse change in the business, assets, results of operations or condition
      (financial or otherwise) of DODI and its subsidiaries considered as a
      whole, or other event or occurrence which, under Applicable Law, would
      necessitate the filing of a report on Form 8-K.

      3.2 REPRESENTATIONS AND WARRANTIES OF BUYER. Buyer represents and warrants
to the Company as follows:

            (a) DUE ORGANIZATION; GOOD STANDING AND POWER. The Buyer is a
      corporation duly organized, validly existing and in good standing under
      the laws of the state of Texas. The Buyer has the corporate power and
      authority to own, lease and operate the Assets and to conduct the
      Business. The Buyer is duly authorized, qualified or licensed to do
      business as a foreign corporation and is in good standing in each
      jurisdiction in which its right, title or interest in or to any of the
      assets, or the conduct of the business, requires such authorization,
      qualification or licensing, except where the failure to so qualify or to
      be in good standing in such other jurisdictions would not have a material
      adverse effect on any of its assets, business or the results of operations
      of the Buyer. No actions or proceedings to dissolve the Buyer are pending.

            (b) AUTHORIZATION AND VALIDITY OF AGREEMENT. The execution, delivery
      and performance of this Agreement by the Buyer have been duly authorized
      by all requisite action on its part. No other corporate action is
      necessary for the authorization, execution, delivery, and performance by
      the Buyer of this Agreement and the consummation by the Buyer of the
      transactions contemplated hereby. This Agreement has been duly executed
      and delivered by the Buyer and constitutes a legal, valid and binding
      obligation of the Buyer, enforceable against it in accordance with its
      terms, except as the same may be limited by bankruptcy, insolvency or
      other similar laws affecting creditors' rights generally and by general
      equity principles. Except as described in SCHEDULE 3.2(B) hereto and as
      would not constitute a material adverse effect on the transactions
      contemplated herein, the execution, delivery and performance of this
      Agreement by the Buyer and the consummation by it of the transactions
      contemplated hereby (i) will not violate (with or without the giving of
      notice or the lapse of time or both) or require any consent, approval,
      filing or notice under, any provision of any law, rule or regulation,
      court order, judgment or decree applicable to the Buyer; (ii) will not
      conflict with, or result in the breach or termination of any provision of,
      or constitute a default under, or result in the acceleration of the
      performance of the obligations of the Buyer under the charter or by-laws
      of the

                                       13
<PAGE>
      Buyer, or any indenture, mortgage, deed of trust, lease, licensing
      agreement, contract, instrument or other agreement to which the Buyer is a
      party or by which it or any of its assets is bound or affected; and (iii)
      will not require any consent, approval, waiver, order or authorization of,
      or registration, declaration or filing with, any Governmental Entity,
      except for (x) the filing pursuant to the HSR Act and (y) any necessary
      consents to transfer or assign Permits, to the extent the same are
      transferable or assignable.

            (c) NO APPROVALS OR NOTICES REQUIRED; NO CONFLICT WITH INSTRUMENTS.
      Except as disclosed on SCHEDULE 3.2(C), the execution, delivery and
      performance of this Agreement by Buyer and the consummation by it of the
      transactions contemplated hereby (i) will not violate (with or without the
      giving of notice or the lapse of time or both), or require any consent,
      approval, filing or notice under any provision of any law, rule or
      regulation, court order, judgment or decree applicable to Buyer, and (ii)
      will not conflict with, or result in the breach or termination of any
      provision of, or constitute a default under, or result in the acceleration
      of the performance of the obligations of Buyer, under, the charter or
      bylaws of Buyer or any indenture, mortgage, deed of trust, lease,
      licensing agreement, contract, instrument or other agreement to which
      Buyer is a party or by which Buyer or any of its assets or properties is
      bound.

            (d) CERTAIN FEES. Neither Buyer nor any of its officers, directors
      or employees, on behalf of it, has employed any broker or finder or
      incurred any other liability for any brokerage fees, commissions or
      finders' fees in connection with the transactions contemplated hereby.

      3.3 SURVIVAL OF REPRESENTATIONS AND WARRANTIES. The representations and
warranties of the parties contained in (i) Sections 3.1(a), 3.1(b), 3.1(d),
3.1(e), 3.1(g), 3.1(i), 3.1(j), 3.1(m), 3.1(r) and 3.2 herein shall expire on
the earlier to occur of (x) the date which is forty-five (45) days after
issuance of the Buyer's audited financial statements for the year ending
December 31, 1997 and (y) July 1, 1998; and (ii) Sections 3.1(c), 3.1(f),
3.1(h), 3.1(k), 3.1(l), 3.1(n), 3.1(o), 3.1(p), 3.1(q), and 3.1(s) shall expire
on the Closing Date provided that there shall be no expiration of any such
representation or warranty as to which a bona fide claim has been asserted by
written notice of such claim delivered to the party or parties making such
representation or warranty during the survival period. This Section 3.3 shall
not at any time relieve any party hereto from the performance of such party's
agreements, covenants and undertakings set forth in this Agreement.

      3.4 SCOPE OF REPRESENTATIONS OF THE COMPANY. THE COMPANY MAKES NO
REPRESENTATION OR WARRANTY, EITHER EXPRESS OR IMPLIED, AS TO THE MAINTENANCE,
REPAIR, CONDITION, DESIGN OR MARKETABILITY OF THE REAL ESTATE (EXCEPT AS
OTHERWISE PROVIDED HEREIN) OR ANY OF THE VEHICLES, INVENTORY, DRILL STRING, OR
ANY OF THE RIGS OR ANY PORTION THEREOF OR PROPERTY THEREON, INCLUDING ANY
IMPLIED OR EXPRESS WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE, IT BEING THE EXPRESS AGREEMENT OF BUYER AND THE COMPANY THAT, EXCEPT AS

                                       14
<PAGE>
EXPRESSLY SET FORTH IN THIS AGREEMENT, BUYER WILL OBTAIN THE REAL ESTATE AND THE
VEHICLES, INVENTORY, DRILL STRING AND RIGS IN THEIR CONDITION AND STATE OF
REPAIR ON THE CLOSING DATE, "AS IS," AND "WHERE
IS." Buyer acknowledges and affirms it will have had the opportunity to complete
its own independent investigation, analysis and evaluation of the Real Estate,
Vehicles, Inventory, Drill String and Rigs.

4.    COVENANTS; ACTIONS PRIOR TO CLOSING.

      4.1 ACCESS TO INFORMATION. During the period beginning on the date hereof
and ending on the Closing Date, the Company will (a) give or cause to be given
to Buyer and its representatives such access, during normal business hours, to
the plant, properties, books and records of the Company as Buyer shall from time
to time reasonably request and (b) furnish or cause to be furnished to Buyer
such financial and operating data and other information with respect to the
Company as Buyer shall from time to time reasonably request. Buyer and its
representatives shall be entitled, in consultation with the Company, to such
access to the representatives, officers and employees of the Company as Buyer
may reasonably request. The Company shall permit Buyer and its representatives
to confirm, on reasonable notice and on the basis of agreed methods, with the
Company's principal vendors, customers, and trade Affiliates, that the
acquisition by Buyer of the Company will be acceptable to such vendors,
customers, and trade Affiliates and that the acquisition will not adversely
affect the relationship of such vendors, customers and trade Affiliates with the
Business. The Company agrees that such access by Buyer and its representatives
shall include the right to perform a soil and groundwater analysis of the Real
Estate and to conduct such other environmental investigations of the Real Estate
as Buyer shall deem necessary or appropriate to determine on-site conditions and
the presence or absence of any Hazardous Materials. In connection with such
environmental investigations, the Company will provide to or make available for
inspection by Buyer and its representatives (i) all records relating to the
disposal of waste materials generated at the Real Estate; (ii) all environmental
Permits and records relating to compliance with such Permits; (iii) all records
of spills or other releases; (iv) all records relating to employee exposure to
workplace chemicals; (v) all environmental audits or assessments; (vi) all
insurance records relating to coverage for environmental incidents affecting the
Real Estate; (vii) all chemical inventories and reports of chemical emissions;
(viii) all correspondence relating to pending or threatened environmental
claims; and (ix) all records obtained from prior owners or operators of the Real
Estate relating to environmental conditions.

      4.2 CONDUCT OF THE BUSINESS. Except as specifically required or
contemplated by this Agreement or otherwise consented to or approved in writing
by Buyer, during the period commencing on the date hereof and ending on the
Closing Date, the Company will:

            (a) conduct the Business only in the usual, regular and ordinary
      manner consistent with current practice and, to the extent consistent with
      such operation, use its reasonable efforts to keep available the services
      of the present employees of the Company

                                       15
<PAGE>
      and preserve the Company's present relationships with persons having
      business dealings with the Company;

            (b) maintain the Company's books, accounts and records in the usual,
      regular and ordinary manner, on a basis consistent with past practice, and
      comply in all material respects with all Applicable Laws and other
      obligations of the Company;

            (c) not (i) sell, lease or otherwise dispose of any assets of the
      Company other than sales of assets in the ordinary course of business,
      (ii) modify or change in any material respect any contract of the Company,
      other than in the ordinary course of business or (iii) agree, whether in
      writing or otherwise, to do any of the foregoing;

            (d) not (i) permit or allow any of the assets of the Company to
      become subject to any liens or Encumbrances (other than Permitted
      Encumbrances), (ii) waive any claims or rights relating to the Assets,
      except in the ordinary course of business and consistent with past
      practice, (iii) grant any increase in the compensation of any employees
      employed in the conduct of the Business, except in the ordinary course of
      business or as required by contractual arrangements existing on the date
      hereof, (iv) enter into any agreements giving rise to trade and barter
      obligations relating to the assets of the Company, or (v) agree, whether
      in writing or otherwise, to do any of the foregoing; 

            (e) maintain the inventory associated with each drilling rig,
      including spare components and parts, supporting inventory, drill pipe and
      tubulars, in such amounts and of such quality as would be in accordance
      with past practice and comparable historical levels and sufficient to
      comply with any applicable Contract under which such drilling rig is
      operating; and

            (f) not execute any drilling contracts on a turnkey or footage basis
      without the prior written consent of Buyer.

      4.3 SURVEY AND TITLE INSURANCE COMMITMENT. Prior to the Closing Date, the
Company shall obtain at its expense and provide to Buyer (i) a survey of the
Real Estate prepared by a licensed surveyor and (ii) commitments for title
insurance covering the Real Estate issued by the Title Company, setting forth
the status of title to the Real Estate and listing all encumbrances of record,
shown by the surveys or known to the Company or any of its Affiliates, together
with legible copies of all instruments referred to in such commitment as
constituting exceptions to or restrictions upon the fee simple title of the
Company to the Real Estate. If such commitment shall reveal material
Encumbrances affecting Real Estate which are not Permitted Encumbrances, the
Company may (i) take such steps as shall be necessary to cause any material
Encumbrances affecting the Real Estate which are not Permitted Encumbrances to
be removed or cured prior to the Closing or (ii) eliminate the Real Estate as an
Asset to be purchased by Buyer and reduce the Purchase Price by the amount
allocated thereto in SCHEDULE 2.3. The survey shall (a) reflect the actual
dimensions of, and area within, the Real Estate, the location of all easements,
set-back lines, encroachments or overlaps thereon or thereover, and the outside
boundary lines of all improvements, (b) identify all (except solely as any such
exception relates to encroachments constituting Permitted Encumbrances),
easements, set-back lines and other matters referred to in the title commitment,
(c) include the surveyor's registered number and seal, the date or dates of

                                       16
<PAGE>
the survey and a certificate satisfactory to Buyer of such surveyor, (d) reflect
that there is access to and from the Land from a publicly dedicated street or
road, (e) be sufficient to cause the Title Company to delete the printed
exception for "discrepancies, conflicts or shortages in area or boundary lines,
or encroachments, or any overlapping of improvements" from the owner's title
insurance policy to be delivered pursuant to Section 1.3(a) hereof (except
solely as any such exception relates to encroachments constituting Permitted
Encumbrances), (f) reflect any area that has been designated by the Federal
Insurance Administration, the Army Corps of Engineers or any other governmental
agency or body as being subject to special or increased flooding hazards, (g)
show all items of record affecting such property, (h) contain a metes and bounds
description of each such parcel of Real Estate and (i) in general, comply with
the requirements of an ALTA/ASCM land title survey. For purposes of the property
description to be included in the special warranty deed and in the owner's
policy of title insurance delivered pursuant to Section 1.3(a) hereof, the field
notes prepared by the surveyor shall be subordinate with respect to any
conflicts or inconsistencies between such field notes and the legal description
in SCHEDULE 1.1(A) hereto.

      4.4 FURTHER ACTIONS. Subject to the terms and conditions hereof, the
Company and Buyer will each use their reasonable best efforts to take, or cause
to be taken, all action and to do, or cause to be done, all things necessary,
proper or advisable to consummate and make effective the transactions
contemplated by this Agreement, including using reasonable best efforts: (i) to
obtain prior to the Closing Date all Permits, consents, approvals,
authorizations, qualifications and orders of Governmental Entities and parties
to Contracts as are necessary for the consummation of the transactions
contemplated hereby; (ii) to effect all necessary registrations and filings; and
(iii) to furnish to each other such information and assistance as reasonably may
be requested in connection with the foregoing. Where the consent of any third
party is required under the terms of any of the Company's leases or contracts to
the transactions contemplated by this Agreement, the Company will use reasonable
best efforts to obtain such consent on terms and conditions not less favorable
than as in effect on the date hereof. The Company and Buyer shall cooperate
fully with each other to the extent reasonably required to obtain such consents.
Notwithstanding any other provision hereof, this Agreement shall not constitute
or require an assignment to Buyer of any Contract, Permit, or other right if an
attempted assignment of the same without the consent of any party would
constitute a breach thereof or a violation of Applicable Law unless and until
such consent shall have been obtained.

      4.5 NOTIFICATION. The Company shall promptly notify Buyer in writing and
keep it advised as to (i) any litigation or administrative proceeding filed or
pending against the Company or, to its knowledge, threatened against it, which
would (x) have a material adverse effect on the Assets or (y) challenge the
transactions contemplated hereby; (ii) any material damage or destruction of any
of the Assets of the Company; (iii) any material adverse change in the results
of operations of the Company; and (iv) any variance from the representations and
warranties contained in Section 3.1 hereof or of any failure or inability on the
part of the Company to comply with any of its covenants contained in this
Section 4.

                                       17
<PAGE>
      4.6 NO INCONSISTENT ACTION. Subject to Sections 6.1 and 6.2 hereof, no
party hereto shall take any action inconsistent with its obligations under this
Agreement or which could materially hinder or delay the consummation of the
transactions contemplated by this Agreement. The Company shall use reasonable
best efforts to cause the representations and warranties made by it herein to
continue to be true and correct on and as of the Closing Date as if made on and
as of the Closing Date.

      4.7 ACQUISITION PROPOSALS. None of the Company, or any Affiliate,
director, officer, employee or representative of any of them shall, directly or
indirectly (i) solicit, initiate or knowingly encourage any Acquisition Proposal
or (ii) engage in discussions or negotiations with any person that is
considering making or has made an Acquisition Proposal. The Company shall
immediately cease and cause to be terminated any existing activities,
discussions or negotiations with any persons conducted heretofore with respect
to any Acquisition Proposal. The term "Acquisition Proposal," as used herein,
means any offer or proposal for or any indication of interest in, a merger or
other business combination involving the Company, or the acquisition of an
equity interest in or substantial portion of the assets of, the Company, other
than the transactions contemplated by this Agreement.

      4.8 HART-SCOTT-RODINO ACT. The Company and the Buyer will each file the
Notification and Report Forms and related material that they are required to
file with the Federal Trade Commission and the Antitrust Division of the United
States Department of Justice under the HSR Act, will use their reasonable
efforts to obtain an early termination of the applicable waiting period, and
will make any further filings pursuant thereto that may be necessary, proper, or
advisable, provided, however, that the reasonable efforts of Buyer shall not
include (a) proffering Buyer's willingness to accept an order providing for the
divestiture of such of the properties, assets, operations, or business of the
Company (or, in lieu thereof, such properties, assets, operations, or business
of Buyer or any of Buyer's Affiliates) as are necessary to permit the
consummation of the transactions contemplated by this Agreement, including an
offer to hold separate such properties, assets, operations or businesses pending
any such divestiture, (b) proffering Buyer's willingness to accept any other
conditions, restrictions, limitations or agreements affecting the full rights of
ownership of the Company's assets (or any portion thereof) as may be necessary
to permit the consummation of the transactions contemplated by this Agreement,
or (c) entering into or continuing any litigation relating to this Agreement or
the transactions contemplated hereby and the reasonable efforts of the Company
shall not include entering into or continuing any litigation relationship
relating to this Agreement or the transactions contemplated hereby.

      4.9 PUBLIC ANNOUNCEMENTS. Except as may be required by Applicable Law or
stock exchange or National Association of Securities Dealers, Inc. regulation,
neither Buyer and DI Industries, Inc., a Texas corporation ("DI"), on the one
hand, nor DODI and the Company, on the other, shall issue any press release or
otherwise make any public statements with respect to this Agreement or the
transactions contemplated hereby without the prior written consent of the other
party.

                                       18
<PAGE>
      4.10  RIG LOSS.  Notwithstanding any other provision of this Agreement:

            (a) If any Rig shall become an actual or constructive total loss (as
      determined by the Company's insurance underwriter) prior to the Closing
      Date: (i) Buyer shall not be required to purchase such Rig, (ii) the
      Purchase Price shall be reduced by the amount allocated to such rig
      pursuant to SCHEDULE 2.3, (iii) the term "Assets" shall be deemed not to
      include such Rig and the Company shall be entitled to any insurance
      proceeds and claims with respect thereto (and such proceeds and claims
      shall be deemed to be Excluded Assets for all purposes hereunder) and (iv)
      the other provisions of this Agreement shall continue to be in effect and
      the Closing shall take place in the manner contemplated herein.

            (b) If a Rig sustains damage (estimated to cost more than $10,000 to
      repair) not amounting to an actual or constructive total loss prior to the
      Closing Date, at the Company's election either (i) the Company shall
      repair or cause to be repaired the damage to the Rig at the Company's own
      expense or (ii) elect not to repair such Rig. In the case of an election
      under 4.10(b)(ii), the Buyer may (x) require the Company to assign to
      Buyer at the Closing the rights the Company has to receive insurance
      proceeds in respect of such loss or damage or (y) elect to not purchase
      the Rig and be entitled to a reduction in Purchase Price equal to its
      value as set out in SCHEDULE 1.1(B). In the case of either (i) or (ii)(x)
      above, Buyer shall remain obligated to purchase the Assets on the Closing
      Date and the Purchase Price shall not be reduced.

      4.11 PERFORMANCE BONDS. If the Company has posted a performance or other
similar bond or letter of credit in connection with the Company's ownership or
operation of the Equipment or its performance under a Contract, Buyer and the
Company shall cooperate with each other in order (i) for the Company to obtain
the release of any such bond and (ii) to the extent required, for Buyer to
obtain a substitute bond or letter of credit or to assume the Company's existing
bond. Buyer shall reimburse the Company for all costs incurred by the Company as
a result of the Company's leaving a performance or similar bond or letter of
credit in place after the Closing Date in order to permit Buyer to operate the
Assets after the Closing Date.

      4.12 ENVIRONMENTAL MATTERS. As soon as practicable after the date of this
Agreement, the Company shall select and retain, subject to the Buyer's
reasonable approval, an environmental consulting firm to conduct a mutually
agreeable environmental study of the Real Estate. The cost of such study shall
be borne one-half by the Company and one-half by the Buyer. Such assessment
shall estimate the cost of remediation, if any. In the event, as a result of
such assessment, the Real Estate requires any remediation, the Company agrees to
perform such remediation at a cost not to exceed $100,000. In the event the
costs for such remediation exceed $100,000, the Buyer shall have the right to
either (i) proceed with the Closing and purchase of the Real Estate, or (ii)
terminate this Agreement under Section 7.1(b). In the event the Buyer elects to
proceed with the Closing, Company shall cause the remediation to occur as
expeditiously

                                       19
<PAGE>
as possible. Company shall pay the first $100,000 of the remediation costs and
Buyer shall pay any costs in excess of $100,000.

5.    CONDITIONS PRECEDENT.

      5.1 CONDITIONS PRECEDENT TO OBLIGATIONS OF ALL PARTIES. The respective
obligations of the parties to consummate the transactions contemplated by this
Agreement shall be subject to the satisfaction (or waiver by each party) at or
prior to the Closing Date of each of the following conditions:

            (a) NO GOVERNMENTAL ACTION. No action of any private party or
      Governmental Entity shall have been taken or threatened and no statute,
      rule, regulation or executive order shall have been proposed, promulgated
      or enacted by any Governmental Entity which seeks to restrain, enjoin or
      otherwise prohibit or to obtain damages or other relief in connection with
      this Agreement or the transactions contemplated hereby.

            (b) TERMINATION UNDER HART-SCOTT-RODINO ACT. The termination or
      early termination of the applicable waiting period under the HSR Act shall
      have occurred.

      5.2 CONDITIONS PRECEDENT TO OBLIGATIONS OF BUYER. The obligations of Buyer
under this Agreement are subject to the satisfaction (or waiver by Buyer) at or
prior to the Closing Date of each of the following conditions:

            (a) ACCURACY OF REPRESENTATIONS AND WARRANTIES. All representations
      and warranties of the Company contained herein or in any certificate or
      document delivered to Buyer pursuant hereto shall be true and correct on
      and as of the Closing Date, with the same force and effect as though such
      representations and warranties had been made on and as of the Closing
      Date.

            (b) PERFORMANCE OF AGREEMENTS. The Company shall have performed all
      obligations and agreements, and complied with all covenants and
      conditions, contained in this Agreement to be performed or complied with
      by it prior to or at the Closing Date.

            (c) OFFICERS CERTIFICATE. The Buyer shall have been furnished with a
      certificate of a senior officer of the Company as to the satisfaction of
      the conditions set forth in Sections 5.2(a) and (b) above.

            (d) ACTIONS AND PROCEEDINGS. All corporate actions, proceedings,
      instruments and documents required to carry out the transactions
      contemplated by this Agreement or incidental thereto and all other related
      legal matters shall be reasonably satisfactory to counsel for Buyer, and
      such counsel shall have been furnished with such certified copies of such
      corporate actions and proceedings and such other instruments and documents
      as it shall have reasonably requested.

                                       20
<PAGE>
            (e) LICENSES AND CONSENTS. All Permits, approvals, authorizations,
      qualifications and orders of Governmental Entities (including any air and
      water discharge permits required by the United States Environmental
      Protection Agency) which are reasonably necessary to enable Buyer to own
      the Assets and conduct the Business after the Closing in substantially the
      same manner as the assets of the Company are owned and the Business is
      being conducted as of the date hereof shall be in full force and effect.
      All consents for Consent Required Contracts shall have been obtained.

            (f) ENVIRONMENTAL STUDY. The environmental study contemplated by
      Section 4.12 has been completed to the satisfaction of the Buyer and the
      Buyer has agreed to proceed with the Closing.

            (g) OPINION OF COUNSEL OF THE COMPANY. Weil Gotshal & Manges, LLP,
      counsel for the Company, shall have furnished to Buyer its written
      opinion, dated the Closing Date, substantially in the form attached as
      Exhibit C.

            (h) OPERATION. The Business shall have been operated and maintained
      substantially in the manner in which it has been operated and maintained
      previously in the ordinary course of business and the Company shall not
      have entered into or renewed any material agreements or other commitments
      extending a substantial term beyond the Closing Date or taken any action
      which is not in the ordinary course of business, except for the
      transactions otherwise contemplated herein, without the prior written
      approval of Buyer.

            (i) MATERIAL ADVERSE CHANGE. There shall have been no material
      adverse change in the Assets or the Business from the date of this
      Agreement until the Closing Date.

            (j) RIG AUDIT. Buyer shall have reviewed the Real Estate, Rigs,
      Vehicles, Inventory and Drill String of the Company and found such assets
      to be in good and usable condition taken as a whole.

            (k) PAYOFF LETTERS. The Company shall have provided Buyer with (i)
      payoff letters, with per diem interest amounts, and (ii) Uniform
      Commercial Code financing statements executed by the secured party, if
      any, which release any UCC filed liens or security interests that encumber
      the Assets, all at the Company's expense, from its lenders.

            (l) FINANCIAL AUDIT. The audit to be conducted pursuant to Section
      1.6 hereof, insofar as required to meet the requirements of Rule 3-05 of
      the rules and regulations of the Securities & Exchange Commission, shall
      have been completed and delivered to Buyer.

                                       21
<PAGE>
      5.3 CONDITIONS PRECEDENT TO THE OBLIGATIONS OF THE COMPANY. The
obligations of Company under this Agreement are subject to the satisfaction (or
waiver by the Company) at or prior to the Closing Date of each of the following
conditions:

            (a) ACCURACY OF REPRESENTATIONS AND WARRANTIES. All representations
      and warranties of Buyer contained herein or in any certificate or document
      delivered to the Company pursuant hereto shall be true and correct on and
      as of the Closing Date, with the same force and effect as though such
      representations and warranties had been made on and as of the Closing
      Date, except as contemplated or permitted by this Agreement.

            (b) PERFORMANCE OF AGREEMENTS. Buyer shall have performed all
      obligations and agreements, and complied with all covenants and conditions
      contained in this Agreement to be performed or complied with by it prior
      to or at the Closing Date.

            (c) ACTIONS AND PROCEEDINGS. All corporate actions, proceedings,
      instruments and documents required to carry out the transactions
      contemplated by this Agreement or incidental thereto and all other related
      legal matters shall be reasonably satisfactory to counsel for the and the
      Company, and such counsel shall have been furnished with such certified
      copies of such corporate actions and proceedings and such other
      instruments and documents as it shall have reasonably requested.

            (d) OPINION OF COUNSEL TO BUYER. Gardere Wynne Sewell & Riggs,
      L.L.C., counsel for Buyer, shall have furnished to the Company its written
      opinion, dated the Closing Date, substantially in the form attached as
      Exhibit D.

      5.4 DEEMED WAIVER OF CONDITIONS PRECEDENT. In the event that the Closing
occurs, all conditions precedent contained in this Article 5 which have not been
satisfied on the Closing Date shall (except as otherwise mutually agreed by the
parties) be deemed to have been waived by the applicable requisite party.

6.    EMPLOYEES.

      6.1 EMPLOYMENT. The Company shall terminate its employment relationship
with each of its employees and the employees of the Company's Affiliates located
in Alice, Texas on and as of the Closing Date. Buyer shall offer employment to
all of Company's employees and the employees of the Company's Affiliates
currently located in Alice, Texas following the Closing, such offer to be
subject to their passing physical and drug screening as Buyer deems appropriate.
The Company shall provide reasonable assistance to the Buyer in the hiring
process. For each employee to whom the Buyer offers employment, such employee
will be (i) offered compensation (not including benefits) at least equal to the
current compensation (not including benefits) of such employee, (ii) offered
benefits equivalent to employees in similar positions at Buyer (which, in the
case of Buyer's group health and welfare plan, shall contain no pre-existing
conditions exclusions or eligibility waiting periods other than such conditions
and waiting periods that are in effect at the Company and have not been
satisfied with respect to an employee), and (iii)

                                       22
<PAGE>
credited with the number of years of his or her employment by the Company for
the purposes of any of Buyer's employment plans under which period of service is
used to determine benefits owed thereunder. Buyer will use its reasonable best
efforts to obtain a waiver of any such Alice, Texas employee of the obligation
of DODI under a severance agreement affecting such employees. Buyer shall be 
responsible for claims and liabilities arising from any unlawful discrimination
engaged in, or allegedly engaged in, solely by Buyer in the hiring of employees 
of the Company or the employees of the Company's Affiliates located in Alice, 
Texas.

      6.2 NO BUYER LIABILITY. The Buyer shall have no responsibility, liability
or obligation, whether to employees, former employees, their beneficiaries or to
any other person with respect to, and the Company shall indemnify and hold the
Buyer harmless with respect to, the termination of the employment of the
Company's employees, any liability under the Worker Adjustment and Retraining
Notification Act (WARN) arising as a result of the terminations of employment
relationships contemplated by the first sentence of Section 6.1, any employee
benefit plan, practice, program or arrangement (including the establishment,
operation or termination thereof) maintained for employees of the Company prior
to the Closing. The Company shall remain responsible for all expenses, taxes,
claims, obligations or liabilities associated with, arising out of or relating
to any employee benefit plan, practice, program or arrangement maintained by the
Company with respect to the Company prior to the Closing, including medical or
disability claims incurred but unreported prior to the Closing and medical
benefits with respect to any employee of the Company whose employment by the
Company was terminated on or before the Closing Date to the extent required by
law. Buyer shall be under no obligation to maintain or continue the medical and
long-term disability insurance policies currently maintained by the Company for
the Company's employees.

7.    TERMINATION.

      7.1 GENERAL. This Agreement may be terminated and the transactions
contemplated herein may be abandoned (a) by mutual consent of Buyer and the
Company or (b) by Buyer's election under Section 4.12, or (c) by any party by
notice to the other parties in the event that the Closing Date shall not have
occurred on or before the later to occur of (i) December 31, 1996 or (ii) the
satisfaction of Sections 5.1 and 5.2(f) and (k), but not later than February 28,
1996; provided, however, that if the Closing Date shall not have occurred on or
before such date due to a breach of this Agreement by one of the parties or an
Affiliate of such party, that party may not terminate this Agreement.

      7.2 NO LIABILITIES IN EVENT OF TERMINATION. Except as set forth in Section
7.3 below, in the event of any termination of this Agreement as provided above,
this Agreement shall forthwith become wholly void and of no further force or
effect and there shall be no liability on the part of Buyer, the Company or
their respective officers, directors, or agents, except that the provisions of
Section 10.1 and Section 10.12 hereof shall remain in full force and effect, and
provided that nothing contained herein shall release any party from liability
for breach of any provision, covenant or agreement contained herein.

      7.3 FAILURE TO CLOSE. On the date of this Agreement, Buyer has delivered
$2,000,000 to Texas Commerce Bank National Association, as Escrow Agent (the
"Escrow Agent"), on the

                                       23
<PAGE>
terms and conditions set forth in the Escrow Agreement attached hereto as
EXHIBIT E (the "Escrow Agreement"). The $2,000,000 plus any interest earned
thereon, less any fees and expenses of the Escrow Agent (the "Escrow Fund")
shall serve as a non-refundable deposit and liquidated damages to secure the
performance of Buyer's obligations hereunder. Buyer acknowledges that in
agreeing to negotiate this Agreement, the Company has foregone the opportunity
to negotiate with other potential purchasers of the Assets and to make certain
operational and other changes at the Company. Therefore, the Buyer and the
Company agree that if there is a failure to close the acquisition of the Assets,
the Company shall be entitled to retain the Escrow Fund as a commitment fee and
liquidated damages and not as a penalty, unless, (a) the Closing does not occur
as a result of a condition in Section 5.1 or 5.2 not being satisfied through no
fault of Buyer, (b) the Agreement is terminated through mutual Agreement of
Buyer and the Company, or (c) the Agreement is terminated by Buyer under the
provisions of Section 4.12. The Escrow Fund shall be the Company's SOLE and
EXCLUSIVE remedy for a breach of the Buyer's obligations under this Agreement,
and Buyer shall have no other liability to the Company or the under this
Agreement or otherwise.

8.    COVENANTS; ACTION SUBSEQUENT TO CLOSING.

      8.1 POST CLOSING CONSENT. In the event that the Company shall have failed
prior to the Closing Date to obtain consents to the transfer of any Contract,
Permit or other right that cannot be effectively transferred to Buyer without
such consent (a "Consent Required Contract"), and the Buyer nevertheless
determines to proceed with the Closing, the terms of this Section 8.1 shall
govern the transfer of the benefits of each such Consent Required Contract. The
Company and Buyer shall use their reasonable best efforts after the Closing Date
to obtain any required consent to the assignment to, and the assumption by,
Buyer of each Consent Required Contract that is not transferred to the Buyer at
the Closing ("Non-assigned Contract"). The Company and Buyer shall enter into an
agreement on the Closing Date with respect to each Non-assigned Contract
providing that until the rights and obligations of the Company thereunder are
transferred to or assumed by Buyer, or, if earlier, until the termination of
such Non-assigned Contract, the Company shall continue to perform its
obligations thereunder and Buyer shall provide such assistance, at the sole
expense of Buyer, as the Company may reasonably request for such purpose,
including the use of personnel and assets (by lease or otherwise) of Buyer and
its Affiliates of the type and quantity that the Company would have used to
perform such Non- assigned Contract had the transactions contemplated by this
Agreement not been consummated. Such agreement shall also provide that in
consideration of the provision of such assistance, the Company shall, promptly
after the payment of any amounts to the Company by the other party to a
Non-assigned Contract, pay such amounts to Buyer after subtracting therefrom the
reasonable direct costs and expenses actually incurred by the Company as a
result of its performance of the Non-assigned Contract. The parties hereto
acknowledge and agree that it is the mutual intent of the parties that all
benefits and burdens (except those accrued as of the Closing Date) with respect
to the foregoing shall be borne by Buyer after the Closing Date and, at the
Closing, the parties agree to enter into an agreement to such effect.

      8.2   ACCESS TO BOOKS AND RECORDS.

                                       24
<PAGE>
            (a) Until the third anniversary of the Closing Date, the Company
      shall afford, and will cause its Affiliates to afford, to the Buyer, its
      counsel, accountants and other authorized representatives, during normal
      business hours, reasonable access to the books, records and other data of
      the Company and the Business with respect to periods ending on or prior to
      the Closing Date to the extent that such access may be reasonably required
      by the Buyer to facilitate (i) the investigation, litigation and final
      disposition of any claims which may have been or may be made against the
      Buyer in connection with the Business or (ii) for any other reasonable
      business purpose.

            (b) Until the third anniversary of the Closing Date, Buyer shall
      afford, and will cause its Affiliates to afford, to the Company and
      Guarantor (as hereinafter defined), their respective counsel, accountants
      and other authorized representatives, during normal business hours,
      reasonable access to the books, records and other data of the Company and
      the Business and of Buyer relating to the Company and the Business with
      respect to periods ending on or prior to the Closing Date to the extent
      that such access may be reasonably required by the Company or Guarantor to
      facilitate (i) the investigation, litigation and final disposition of any
      claims which may have been or may be made against the Company or Guarantor
      in connection with the Business or (ii) for any other reasonable business
      purpose.

      8.3 MAIL. The Company authorizes and empowers Buyer on and after the
Closing Date to receive and open all mail received by Buyer relating to the
Business or the Assets and to deal with the contents of such communications in
any proper manner. The Company shall promptly deliver to Buyer any mail or other
communication received by it after the Closing Date pertaining to the Business
or the Assets. Buyer shall use its reasonable best efforts to promptly deliver
to DODI any mail or other communication received by it after the Closing Date
pertaining to the assets described in Section 1.2 hereof, any cash, checks or
other instruments of payment in respect of such assets, or the Retained
Liabilities.

      8.4 NEW IBERIA FACILITY. Buyer agrees to remove all Inventory and Drill
String from the Company's New Iberia, Louisiana, facility within 90 days from
Closing.

      8.5 PARENT'S AND COMPANY'S COVENANTS NOT TO COMPETE. In order to allow
Buyer to realize the full benefit of its bargain in connection with the purchase
of the Assets, neither the DODI nor the Company will at any time for a period of
three years following the Closing Date, directly or indirectly, acting alone or
as a member of a partnership or as a holder of in excess of 5% of any security
of any class, or as a consultant to or representative of, any corporation or
other business entity, engage in any business in competition with the Business
as conducted by the Company at the date hereof in those geographic areas in
which such Business is conducted or has been conducted within one year prior to
the Closing Date.

Notwithstanding the foregoing, the restrictions above shall not restrict DODI,
its Affiliates, or the Company from competing with the Buyer in South Texas if
such competition results from the acquisition of a competing business in an
acquisition where the business in competition with

                                       25
<PAGE>
Buyer was not a major portion of the business acquired by DODI, its Affiliates
or the Company. DODI and the Company acknowledge that in the event the scope of
the covenants set forth in this Section 8.5 is deemed to be too broad in any
proceeding, the court may reduce such scope to that which it deems reasonable
under the circumstances. The parties hereto agree and acknowledge that Buyer
would not have any adequate remedy at law for the breach or threatened breach by
either DODI, the Company or any of their Affiliates of the covenants and
agreements set forth in this Section 8.5 and, accordingly, DODI and Company
further agree that Buyer may, in addition to the other remedies which may be
available to it hereunder, file suit in equity to enjoin either DODI, the
Company, or any of their Affiliates from such breach or threatened breach and
consent to the issuance of injunctive relief hereunder. DODI and the Company
understand and agree that the act of Buyer in entering into this Agreement, and
Buyer's covenants and payments hereunder, shall and do constitute sufficient
consideration for DODI and the Company to agree not to compete against Buyer as
set out in this Section 8.5.

9.    INDEMNIFICATION.

      9.1 INDEMNIFICATION BY THE COMPANY. Subject to the provisions of this
Section 9, the Company shall protect, indemnify and hold harmless Buyer, its
Affiliates and each of its and their respective officers, directors and agents
and each person who controls Buyer in respect of any losses, claims, damages,
liabilities, deficiencies, delinquencies, defaults, assessments, fees, penalties
or related costs or expenses, including court costs and attorneys', and
accountants' fees and disbursements, and any federal, state or local income or
franchise taxes payable in respect of the receipt of cash or money in discharge
of the foregoing (collectively referred to herein as "Damages") to which any
Indemnified Party may become subject if such Damages arise out of or are based
upon (i) the Retained Liabilities, provided, however, the Company shall only
have liability hereunder when Damages arising from such Retained Liabilities
exceed a $10,000 aggregate threshold (at which point the Company will be
obligated to indemnify Buyer from and against all such Damages relating back to
the first dollar), and (ii) the breach of any of the representations or
warranties described in Section 3.3(i) or covenants or agreements made by the
Company in this Agreement, including the Exhibits and Schedules hereto, or in
any certificate or instrument delivered by or on behalf of the Company pursuant
to this Agreement; PROVIDED, HOWEVER, that Buyer shall not be entitled to assert
rights of indemnification under this Section 9.1(ii) unless and until the
aggregate of all such Damages exceeds $100,000 (it being understood that such
Damages shall accumulate until such time or times as the aggregate of all such
Damages exceeds $100,000, whereupon Buyer shall be entitled to indemnification
hereunder for any such Damages in excess of, but excluding, $100,000).

      9.2 INDEMNIFICATION BY BUYER. Subject to the provisions of this Section 9,
Buyer shall protect, indemnify and hold harmless the Company, its Affiliates and
each of its and their respective officers, directors and agents, and each person
who controls the Company, in respect of any Damages to which the Company may
become subject if such Damages arise out of or are based upon the (i) the
Assumed Liabilities, provided, however, Buyer shall only have liability
hereunder when Damages arising from such Assumed Liabilities exceed a $10,000
aggregate threshold (at which point the Buyer will be obligated to indemnify any
Indemnified Party from

                                       26
<PAGE>
and against all such Damages relating back to the first dollar), (ii) breach of
any of the representations, warranties, covenants or agreements made by Buyer in
this Agreement, including the Exhibits and Schedules hereto and (iii) all
liabilities for any violation of Environmental Laws arising after the Closing
Date regardless of whether the act, omission, fact, or circumstance giving rise
thereto occurred or existed on or before the Closing Date; PROVIDED, HOWEVER,
that the Company shall not be entitled to assert rights of indemnification under
this Section 9.2(ii) unless and until the aggregate of all such Damages exceeds
$100,000 (it being understood that such Damages shall accumulate until such time
or times as the aggregate of all such Damages exceeds $100,000, whereupon the
Company shall be entitled to indemnification hereunder for any such Damages in
excess of, but excluding, $100,000).

      9.3 MONETARY LIMIT ON INDEMNIFICATION LIABILITY. Notwithstanding any other
provisions to the contrary in this Agreement, the liabilities under Section 9.1
of the Company, on the one hand, and the liabilities under Section 9.2 of Buyer,
on the other, shall be limited to the Purchase Price.

      9.4 INDEMNIFICATION PROCEDURES. The obligations and liabilities of each
indemnifying party hereunder with respect to claims resulting from the assertion
of liability by the other party or third parties shall be subject to the
following terms and conditions:

            (a) If any person shall notify an indemnified party (the
      "Indemnified Party") with respect to any matter which may give rise to a
      claim for indemnification (a "Claim") against Buyer on the one hand or the
      Company on the other (the "Indemnifying Party") under this Section 9, then
      the Indemnified Party shall promptly notify each Indemnifying Party
      thereof in writing; provided, however, that no delay on the part of the
      Indemnified Party in notifying any Indemnifying Party shall relieve the
      Indemnifying Party from any obligation hereunder unless (and then solely
      to the extent) the Indemnifying Party thereby is prejudiced.

            (b) Any Indemnifying Party will have the right to defend the
      Indemnified Party against the Claim with counsel of its choice reasonably
      satisfactory to the Indemnified Party so long as (i) the Indemnifying
      Party notifies the Indemnified Party in writing within 15 days after the
      Indemnified Party has given notice of the Claim that the Indemnifying
      Party will indemnify the Indemnified Party from and against the entirety
      (subject to any limitations contained in Section 9) of any Damages the
      Indemnified Party may suffer resulting from, arising out of, relating to,
      in the nature of or caused by the Claim, (ii) the Indemnifying Party
      provides the Indemnified Party with evidence reasonably acceptable to the
      Indemnified Party that the Indemnifying Party will have the financial
      resources to defend against the Claim and fulfill its indemnification
      obligations hereunder, (iii) the Claim involves only money damages and
      does not seek an injunction or other equitable relief, (iv) settlement of,
      or an adverse judgment with respect to, the Claim is not, in the good
      faith judgment of the Indemnifying Party, likely to establish a
      precedential custom or practice materially adverse to the continuing
      business interests of

                                       27
<PAGE>
      the Indemnified Party, and (v) the Indemnifying Party conducts the defense
      of the Claim actively and diligently and in good faith.

            (c) So long as the Indemnifying Party is conducting the defense of
      the Claim in accordance with Section 9.4(b) above, (i) the Indemnified
      Party may retain separate co- counsel at its sole cost and expense and
      participate in the defense of the Claim, (ii) the Indemnified Party will
      not consent to the entry of any judgment or enter into any settlement with
      respect to the Claim without the prior written consent of the Indemnifying
      Party (not to be withheld unreasonably), and (iii) the Indemnifying Party
      will not consent to the entry of any judgment or enter into any settlement
      with respect to the Claim without the prior written consent of the
      Indemnified Party (not to be withheld unreasonably).

            (d) In the event any of the conditions in Section 9.4(b) above is or
      becomes unsatisfied, however, (i) the Indemnified Party may defend
      against, and consent to the entry of any judgment or enter into any
      settlement with respect to, the Claim in any manner it reasonably may deem
      appropriate (and the Indemnified Party need not consult with, or obtain
      any consent from, any Indemnifying Party in connection therewith), (ii)
      the Indemnifying Party will remain responsible for any damages the
      Indemnified Party may suffer resulting from, arising out of, relating to,
      in the nature of, or caused by the Claim to the fullest extent provided in
      this Section 9.

      9.5 APPLICABILITY OF INDEMNIFICATION OBLIGATION. EACH OF THE AGREEMENTS TO
INDEMNIFY, DEFEND OR HOLD HARMLESS CONTAINED IN SECTIONS 9.1 AND 9.2 OF THIS
AGREEMENT SHALL APPLY IRRESPECTIVE OF WHETHER THE SUBJECT CLAIM IS BASED IN
WHOLE OR IN PART UPON THE SOLE OR CONTRIBUTORY NEGLIGENCE (WHETHER ACTIVE,
PASSIVE OR GROSS), BREACH OF WARRANTY, OR BREACH OR VIOLATION OF ANY DUTY
IMPOSED BY ANY LAW OR REGULATION, ON THE PART OF THE BENEFICIARY OF THE
AGREEMENT, EXCEPT AS OTHERWISE EXPRESSLY PROVIDED IN THIS AGREEMENT.

10.   MISCELLANEOUS.

      10.1 PAYMENT OF CERTAIN FEES AND EXPENSES. Each of the parties hereto
shall pay the fees and expenses incurred by it in connection with the
negotiation, preparation, execution and performance of this Agreement, including
brokers' fees, attorneys' fees and accountants' fees.

      10.2 NOTICES. All notices, requests, demands and other communications
which are required or may be given under this Agreement shall be in writing and
shall be deemed to have

                                       28
<PAGE>
been duly given if delivered personally or mailed, first class mail, postage
prepaid, return receipt requested, as follows:

            (a)   If to the Company:

                        Diamond M Onshore, Inc.
                        15415 Katy Freeway, Suite 900
                        Houston, Texas  77094
                        Attn:  President

            (b)   If to Buyer:

                        Drillers, Inc.
                        625 Paragon Center One
                        450 Gears Road
                        Houston, Texas  77067
                        Attn:  Mr. Thomas P. Richards

                  with a copy to:

                        Gardere Wynne Sewell & Riggs, L.L.P.
                        333 Clay Avenue, Suite 800
                        Houston, Texas  77002
                        Attn:  Mr. Frank Putman

or to such other address as either party shall have specified by notice in
writing to the other party. All such notices, requests, demands and
communications shall be deemed to have been received on the earlier of the date
of delivery or on the fifth business day after the mailing thereof.

      10.3 ENTIRE AGREEMENT. This Agreement (including the Exhibits and
Schedules hereto) constitutes the entire agreement between the parties hereto
and supersedes all prior agreements and understandings, oral and written,
between the parties hereto with respect to the subject matter hereof.

      10.4 BINDING EFFECT; BENEFIT. This Agreement shall inure to the benefit of
and be binding upon the parties hereto and their respective permitted heirs,
personal representatives, successors and assigns. Nothing in this Agreement,
expressed or implied, is intended to confer on any person other than the parties
hereto or their respective heirs, personal representatives, successors and
assigns, any rights, remedies, obligations or liabilities under or by reason of
this Agreement.

      10.5 ASSIGNABILITY. This Agreement shall not be assignable by the Company
without the prior written consent of Buyer or by Buyer without the prior written
consent of the Company;

                                       29
<PAGE>
provided, however, that Buyer shall be entitled to assign this Agreement to an
Affiliate without the consent of Company.

      10.6 AMENDMENT; WAIVER. This Agreement may be amended, supplemented or
otherwise modified only by a written instrument executed by the parties hereto.
No waiver by any party of any of the provisions hereof shall be effective unless
explicitly set forth in writing and executed by the party so waiving. Except as
provided in the preceding sentence, no action taken pursuant to this Agreement,
including any investigation by or on behalf of any party, shall be deemed to
constitute a waiver by the party taking such action of compliance with any
representations, warranties, covenants, or agreements contained herein, and in
any documents delivered or to be delivered pursuant to this Agreement and in
connection with the Closing hereunder. The waiver by any party hereto of a
breach of any provision of this Agreement shall not operate or be construed as a
waiver of any subsequent breach.

      10.7 LIMITATION ON INTEREST. Regardless of any provision contained herein
or any other document executed in connection with this Agreement, the parties
hereto shall not be obliged to pay, and the parties hereto shall never be
entitled to charge, reserve, receive, collect or apply, as interest (it being
understood that interest shall be calculated as the aggregate of all charges
that are contracted for, charged, reserved, received, collected, applied or paid
which constitute interest under Applicable Law) payable hereunder any amount in
excess of the maximum nonusurious contract rate of interest allowed from time to
time by Applicable Law, and in the event any of the parties hereto ever charges,
reserves, receives, collects or applies, as interest, any such excess, at the
option of the payor of such interest, such amount shall be deemed a partial
prepayment of the amount payable hereunder or promptly refunded to the payor of
such interest.

      10.8 SECTION HEADINGS; INDEX. The section headings contained in this
Agreement are for reference purposes only and shall not affect the meaning or
interpretation of this Agreement.

      10.9 SEVERABILITY. If any provision of this Agreement shall be declared by
any court of competent jurisdiction to be illegal, void or unenforceable, all
other provisions of this Agreement shall not be affected and shall remain in
full force and effect.

      10.10 COUNTERPARTS. This Agreement may be executed in any number of
counterparts, each of which shall be deemed to be an original and all of which
together shall be deemed to be one and the same instrument.

      10.11 APPLICABLE LAW. This Agreement shall be governed by, and construed
in accordance with, the laws of the State of Texas.

      10.12 SOLICITATION OF EMPLOYEES. Buyer for itself and its Affiliates
agrees not to solicit for hire any employees of Diamond Offshore Drilling, Inc.
or any subsidiary thereof until November 12, 1998, except as provided below:

            (a) If the acquisition contemplated in this Agreement closes, the
      prohibition shall terminate on the Closing Date as to (i) all employees of
      the Company and

                                       30
<PAGE>
      (ii) Bodley P. Thornton and any other employees of Diamond Offshore
      Drilling, Inc. or its subsidiaries assigned to the Company's Alice, Texas
      office or yard only; and

            (b) If such acquisition does not close, but the Company or
      substantially all of its assets are acquired by a third party, such
      prohibition shall terminate on the date of execution of the definitive
      acquisition agreement as to (i) all employees of the Company and (ii)
      Bodley P. Thornton and any other employees of Diamond Offshore Drilling,
      Inc. or its subsidiaries assigned to the Company's Alice, Texas office or
      yard only.

For purposes hereof, an "employee of the Company" means a person who was an
employee of the Company on October 1, 1996 and shall not apply to any DODI or
Company employees who are now employed by Buyer or its Affiliates.

      10.13 NO THIRD PARTY BENEFICIARIES. This Agreement is solely for the
benefit of the parties hereto and nothing contained herein should be deemed to
confer upon any third parties any remedy, claim, liability reimbursement, claim
of action or other right in excess of those existing without reference to this
Agreement.

      10.14 SURVIVAL. Except as provided in Sections 3.3 and 3.4, no
representations, warranties, covenants or agreements shall survive the Closing
except for Articles 6, 8, 9 and 10 and Section 4.12.

      10.15 DTPA WAIVER. THE PARTIES HEREBY WAIVE THE PROVISIONS OF THE TEXAS
DECEPTIVE TRADE PRACTICES ACT, CHAPTER 17, SUBCHAPTER E, SECTIONS 17.41 THROUGH
17.63, INCLUSIVE (OTHER THAN SECTION 17.555, WHICH IS NOT WAIVED), OF THE TEXAS
BUSINESS AND COMMERCE CODE. 

11.   DEFINITIONS.

      11.1 DEFINED TERMS. As used in this Agreement, each of the following terms
has the meaning given it below:

            "Affiliate" means, with respect to any person, any other person
      that, directly or indirectly, through one or more intermediaries,
      controls, is controlled by, or is under common control with, such person.

                                       31
<PAGE>
            "Applicable Law" means any statute, law, rule or regulation or any
      judgment, order, writ, injunction or decree of any Governmental Entity to
      which a specified person or property is subject.

            "Encumbrances" means liens, charges, pledges, options, mortgages,
      deeds of trust, security interests, claims, restrictions (whether on
      voting, sale, transfer, disposition or otherwise), easements and other
      encumbrances of every type and description, whether imposed by law,
      agreement, understanding or otherwise.

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

            "GAAP" means generally accepted accounting principles as in effect
      on the date of this Agreement.

            "Governmental Entity" means any court or tribunal in any
      jurisdiction (domestic or foreign) or any public, governmental or
      regulatory body, agency, department, commission, board, bureau or other
      authority or instrumentality (domestic or foreign).

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

            "Intellectual Property" means patents, trademarks, service marks,
      trade names, copyrights, trade secrets, know-how, inventions, and similar
      rights, and all registrations, applications, licenses and rights with
      respect to any of the foregoing.

            "IRS" means the Internal Revenue Service.

            "Permits" means licenses, permits, franchises, consents, approvals
      and other authorizations of or from Governmental Entities.

            "Permitted Encumbrances" means the (i) Encumbrances specifically set
      forth on SCHEDULE 3.1(D) hereto; (ii) Encumbrances for taxes, assessments
      and governmental charges not yet due and payable; (iii) statutory liens
      arising in the ordinary course of business relating to obligations (x) as
      to which there is no default on the part of the Company and (y) which are
      Retained Liabilities, excluding any mortgage, security agreement or
      similar document; provided, however, that at the Closing "Permitted
      Encumbrances" shall not include any Encumbrances for taxes, assessments or
      governmental charges filed of record against the Assets, or statutory
      liens filed of record against the Assets; and (iv) with respect to the 
      Real Estate, Encumbrances listed on Schedule 1.1(a).

            "Person" means any individual, corporation, partnership, joint
      venture, association, joint-stock company, trust, enterprise,
      unincorporated organization or Governmental Entity.

                                       32
<PAGE>
            "reasonable best efforts" means a party's best efforts in accordance
      with reasonable commercial practice and without the incurrence of
      unreasonable expense or the initiation of legal action or similar
      extraordinary efforts.

            "Subsidiary" means any corporation more than 30 percent of whose
      outstanding voting securities, or any partnership, joint venture, or other
      entity more than 30 percent of whose total equity interests is owned,
      directly or indirectly, by the Company.

            "Taxes" means any income taxes or similar assessments or any sales,
      excise, occupation, use, ad valorem, property, production, severance,
      transportation, employment, payroll, franchise or other tax imposed by any
      United States federal, state or local (or any foreign or provincial)
      taxing authority, including any interest, penalties or additions
      attributable thereto.

            "Tax Return" means any return or report, including any related or
      supporting information, with respect to Taxes.

      11.2 CERTAIN ADDITIONAL DEFINED TERMS. In addition to such terms as are
defined in Section 10.1, the following terms are used in this Agreement as
defined in the Sections of this Agreement referenced opposite such terms:

      DEFINED TERMS                                         REFERENCE

      Assets                                                Section 1.1
      Acquisition Proposal                                  Section 4.7
      Agreement                                             Preamble
      Assumed Liabilities                                   Section 1.5(c)
      Benefit Plan                                          Section 3.1(p)
      Business                                              Recital 1
      Buyer                                                 Preamble
      Buyer Obligations                                     Section 13.1
      Claim                                                 Section 9.4
      Closing                                               Section 2.1
      Closing Date                                          Section 2.1
      Company                                               Preamble
      Company Obligations                                   Section 12.1
      Consent Required Contract                             Section 8.1
      Contracts                                             Section 1.1(h)
      DI                                                    Section 4.9
      DODI                                                  Section 3.1(s)
      Damages                                               Section 9.1
      Drill String                                          Section 1.1(e)
      Environmental Laws                                    Section 3.1(k)
      Escrow Agent                                          Section 7.3
      Escrow Agreement                                      Section 7.3

                                       33
<PAGE>
      Escrow Fund                                           Section 7.3
      Financial Statements                                  Section 3.1(c)
      Hazardous Material                                    Section 3.1(k)
      Indemnified Party                                     Section 9.4
      Indemnifying Party                                    Section 9.4
      Inventory                                             Section 1.1(d)
      Non-assigned Contract                                 Section 8.1
      Purchase Price                                        Section 2.2
      Real Estate                                           Section 1.1(a)
      Retained Liabilities                                  Section 1.5(a)
      Rigs                                                  Section 1.1(b)
      Title Company                                         Section 1.3(a)
      Vehicles                                              Section 1.1(c)

      11.3 REFERENCES. All references in this Agreement to Sections, paragraphs
and other subdivisions refer to the Sections, paragraphs and other subdivisions
of this Agreement unless expressly provided otherwise. The words "this
Agreement", "herein", "hereof", "hereby", "hereunder" and words of similar
import refer to this Agreement as a whole and not to any particular subdivision
unless expressly so limited. Whenever the words "include", "includes" and
"including" are used in this Agreement, such words shall be deemed to be
followed by the words "without limitation". Each reference herein to a Schedule,
Exhibit or Annex refers to the item identified separately in writing by the
parties hereto as the described Schedule, Exhibit or Annex to this Agreement.
All Schedules, Exhibits and Annexes are hereby incorporated in and made a part
of this Agreement as if set forth in full herein.

12.   DODI GUARANTY.

      12.1 GUARANTY. DODI hereby irrevocably and unconditionally guarantees to
Buyer the prompt and full discharge by the Company of all of the Company's
covenants, agreements, obligations and liabilities under Section 9.1 of this
Agreement including, without limitation, the due and punctual payment of all
amounts which are or may become due and payable by the Company hereunder when
and as the same shall become due and payable (collectively, the "Company
Obligations"), in accordance with the terms hereof. DODI acknowledges and agrees
that, with respect to the Company Obligations, such guaranty shall be a guaranty
of payment and performance and not of collection and shall not be conditioned or
contingent upon the pursuit of any remedies against the Company. If the Company
shall default in the due and punctual performance of any Company Obligation,
including the full and timely payment of any amount due and payable pursuant to
any Company Obligation, DODI will forthwith perform or cause to be performed
such Company Obligation and will forthwith make full payment of any amount due
with respect thereto at its sole cost and expense.

      12.2 GUARANTY UNCONDITIONAL. The liabilities and obligations of DODI
pursuant to this Article 12 are unconditional and absolute and, without limiting
the generality of the foregoing, shall not be released, discharged or otherwise
affected by:

                                       34
<PAGE>
            (1) any acceleration, extension, renewal, settlement, compromise,
      waiver or release in respect of any Company Obligation by operation of law
      or otherwise;

            (2) the invalidity or unenforceability, in whole or in part, of this
      Agreement;

            (3) any modification or amendment of or supplement to this
      Agreement;

            (4) any change in the corporate existence, structure of ownership of
      Buyer, the Company, or DODI or any insolvency, bankruptcy, reorganization
      or other similar proceeding affecting any of them or their assets; or

            (5) any other act, omission to act, delay of any kind by any party
      hereto or any other Person, or any other circumstance whatsoever that
      might, but for the provisions of this Section 12.2, constitute a legal or
      equitable discharge of the obligations of DODI hereunder.

      12.3 WAIVERS OF DODI. DODI hereby waives any right, whether legal or
equitable, statutory or non-statutory, to require Buyer to proceed against or
take any action against or pursue any remedy with respect to the Company or any
other Person or make presentment or demand for performance or give any notice of
nonperformance before Buyer may enforce its rights hereunder against DODI.

      12.4 DISCHARGE ONLY UPON PERFORMANCE IN FULL; REINSTATEMENT IN CERTAIN
CIRCUMSTANCES. DODI's obligations hereunder shall remain in full force and
effect until the Company Obligations shall have been performed in full. If at
any time any performance by any Person of any Company Obligation is rescinded or
must be otherwise restored or returned, whether upon the insolvency, bankruptcy
or reorganization of the Company or otherwise, DODI's obligations hereunder with
respect to such Company Obligation shall be reinstated at such time as though
such Company Obligation had become due and had not been performed.

      12.5 SUBROGATION. Upon performance by DODI of any Company Obligation, DODI
shall be subrogated to the rights of Buyer against the Company with respect to
such Company Obligation; PROVIDED, that DODI shall not enforce any Company
Obligation by way of subrogation against the Company while any Company
Obligation is due and unperformed by the Company.

13.   DI GUARANTY.

      13.1 GUARANTY. DI hereby irrevocably and unconditionally guarantees to the
Company the prompt and full discharge by Buyer of all of Buyer's covenants,
agreements, obligations and liabilities under Section 9.2 of this Agreement
including, without limitation, the due and punctual payment of all amounts which
are or may become due and payable by Buyer hereunder when and as the same shall
become due and payable (collectively, the "Buyer Obligations"), in accordance
with the terms hereof. DI acknowledges and agrees that, with respect to the
Buyer Obligations, such guaranty shall be a guaranty of payment and performance
and not of collection and shall

                                       35
<PAGE>
not be conditioned or contingent upon the pursuit of any remedies against Buyer.
If Buyer shall default in the due and punctual performance of any Buyer
Obligation, including the full and timely payment of any amount due and payable
pursuant to any Buyer Obligation, DI will forthwith perform or cause to be
performed such Buyer Obligation and will forthwith make full payment of any
amount due with respect thereto at its sole cost and expense.

      13.2 GUARANTY UNCONDITIONAL. The liabilities and obligations of DI
pursuant to this Article 13 are unconditional and absolute and, without limiting
the generality of the foregoing, shall not be released, discharged or otherwise
affected by:

            (1) any acceleration, extension, renewal, settlement, compromise,
      waiver or release in respect of any Buyer Obligation by operation of law
      or otherwise;

            (2) the invalidity or unenforceability, in whole or in part, of this
      Agreement;

            (3) any modification or amendment of or supplement to this
      Agreement;

            (4) any change in the corporate existence, structure of ownership of
      the Company, the Buyer or DI or any insolvency, bankruptcy, reorganization
      or other similar proceeding affecting any of them or their assets; or

            (5) any other act, omission to act, delay of any kind by any party
      hereto or any other Person, or any other circumstance whatsoever that
      might, but for the provisions of this Section 13.2, constitute a legal or
      equitable discharge of the obligations of DI hereunder.

      13.3 WAIVERS OF DI. DI hereby waives any right, whether legal or
equitable, statutory or non-statutory, to require the Company to proceed against
or take any action against or pursue any remedy with respect to Buyer or any
other Person or make presentment or demand for performance or give any notice of
nonperformance before the Company may enforce its rights hereunder against DI.

      13.4 DISCHARGE ONLY UPON PERFORMANCE IN FULL; REINSTATEMENT IN CERTAIN
CIRCUMSTANCES. DI's obligations hereunder shall remain in full force and effect
until the Buyer Obligations shall have been performed in full. If at any time
any performance by any Person of any Buyer Obligation is rescinded or must be
otherwise restored or returned, whether upon the insolvency, bankruptcy or
reorganization of Buyer or otherwise, DI's obligations hereunder with respect to
such Buyer Obligation shall be reinstated at such time as though such Buyer
Obligation had become due and had not been performed.

      13.5 SUBROGATION. Upon performance by DI of any Buyer Obligation, DI shall
be subrogated to the rights of the Company against Buyer with respect to such
Buyer Obligation; PROVIDED, that DI shall not enforce any Buyer Obligation by
way of subrogation against Buyer while any Buyer Obligation is due and
unperformed by Buyer.

                                       36
<PAGE>
      IN WITNESS WHEREOF, the parties hereto have executed and delivered this
Agreement on the date first above written.

                                    DIAMOND M ONSHORE, INC.

                                    By: /s/ RICHARD L. LIONBERGER
                                    Name:   Richard L. Lionberger
                                    Title:  Vice President

                                    DRILLERS, INC.

                                    By: /s/ T.D. RICHARDS
                                    Name:   T.D. Richards
                                    Title:  President & C.E.O.

      Diamond Offshore Drilling, Inc. executes this Agreement solely to evidence
its agreement to be bound by and perform the provisions of Article 12 and
Section 8.5 of this Agreement.

                                    DIAMOND OFFSHORE DRILLING, INC.

                                    By: /s/ ROBERT E. ROSE
                                            Robert E. Rose, President

      DI Industries, Inc. executes this Agreement solely to evidence its
agreement to be bound by and perform the provisions of Article 13 of this
Agreement.

                                    DI INDUSTRIES, INC.

                                    BY: /s/ THOMAS P. RICHARDS
                                            Thomas P. Richards, President

                                       37

                         [Diamond M Onshore Letterhead]

                                             December 31, 1996

Drillers, Inc.
625 Paragon Center One
450 Gears Road
Houston, Texas 77067

Gentlemen:

      Reference is hereby made to that certain Asset Purchase Agreement, dated
as of November 12, 1996 (the "Purchase Agreement"), between Diamond M Onshore,
Inc. (the "Company") and Drillers, Inc. ("Buyer"), to which Diamond Offshore
Drilling, Inc. is a party for the purposes of Article 12 and Section 8.5
thereof and DI Industries, Inc. is a party for the purposes of Article 13
thereof. All capitalized terms used in this letter (this "Agreement") and not
otherwise defined shall have the meanings assigned to them in the Purchase
Agreement.

      The Purchase Agreement is hereby amended, effective as of the Closing Date
as follows:

      1.    Subsection 3.1(b)(iii)(y) is hereby amended to read in its entirety
            as follows: "any necessary consents to transfer or assign Contracts
            or Permits, to the extent the same are transferable or assignable".

      2.    Subsection 3.1(k) is hereby amended to insert the word "not" in the
            third line of the first sentence thereof immediately after the word
            "would" and immediately before the word "result".

      3.    Section 10.14 is hereby amended to read in its entirety as follows:

            "10.14 SURVIVAL. Except as provided in Sections 3.3 and 3.4, no
            representations, warranties, covenants or agreements in this
            Agreement shall survive the Closing except for Articles 6,8,9,10,12
            and 13 and Sections 1.2, 1.6, 2.4 and 4.12."

                                       -1-
<PAGE>
     Except as expressly herein amended, the Purchase Agreement shall remain in
full force and effect. All references to the Purchase Agreement in the legal
opinions, certificates, ancillary agreements and other documents delivered at or
in connection with the Closing shall be deemed to refer to the Purchase
Agreement as hereby amended.

     This Agreement shall be governed by and construed in accordance with the
laws of the State of Texas, without giving effect to conflict of laws rules or
principles, and shall inure to the benefit of and be binding upon the successors
and assigns of the parties hereto; provided that this Agreement may not be
assigned by any party without the prior written consent of all other parties. No
provision of this Agreement may be amended, modified or waived, except as a
written document signed by all parties hereto. This Agreement may be executed in
counterparts, each of which shall be deemed to be an original, but all of which,
taken together, shall constitute one and the same Agreement. This Agreement is
not intended to be for the benefit of, and shall not be enforceable by, any
person or entity that is not a party hereto.

     Please acknowledge receipt of this letter and confirm your agreement
concerning the matters stated herein by signing and returning the enclosed copy
hereof, whereupon this Agreement and your acceptance of the terms and conditions
herein provided shall constitute a binding Agreement between us.

                                              Very truly yours,

                                              DIAMOND M ONSHORE, INC,

                                              By: /s/ RICHARD L. LIONBERGER
                                                      Richard L. Lionberger
                                                      Vice President 

Accepted and agreed to as
of the date above first written:

DRILLERS, INC.

By: /s/ RONNIE McBRIDE
Name:   Ronnie McBride
Title:  Sr. V.P.- Domestic Ops. 

DI INDUSTRIES, INC.

By: /s/ RONNIE McBRIDE
Name:   Ronnie McBride
Title:  Sr. V.P.- Domestic Ops. 

DIAMOND OFFSHORE DRILLING, INC.

By: /s/ RICHARD L. LIONBERGER
Name:   Richard L. Lionberger
Title:  Vice President

                            STOCK PURCHASE AGREEMENT

        THIS STOCK PURCHASE AGREEMENT (this "AGREEMENT") dated as of the 28th
day of December, 1996 by and between DI Industries, Inc., a Texas corporation
(the "COMPANY") and Wexford Special Situations 1996, L.P., a Delaware limited
partnership, Wexford Special Situations 1996 Institutional, L.P., a Delaware
limited partnership, Wexford-Euris Special Situations 1996, L.P., a Delaware
limited partnership, and Wexford Special Situations 1996 Limited, a Cayman
Islands exempted company (singly, a "PURCHASER" and collectively, "PURCHASERS").

                              W I T N E S S E T H:

        WHEREAS, each Purchaser wishes to purchase from the Company, and the
Company wishes to sell to Purchaser the number of shares of the Company's common
stock, $.10 par value per share (the "COMMON STOCK") set forth on EXHIBIT A to
this Agreement; and

        WHEREAS, the Purchaser and the Company are entering into this Agreement
to provide for such purchase and sale and to establish various rights and
obligations in connection therewith;

        NOW, THEREFORE, for and in consideration of the premises, and the
agreements contained herein, and other good and valuable consideration, the
receipt and sufficiency of which is hereby acknowledged, the parties hereto,
intending to be legally bound, hereby agree as follows:

                                    ARTICLE 1
                                PURCHASE AND SALE

        Section 1.1. EXCHANGE. Upon the terms and conditions set forth in this
Agreement, at the Closing (hereafter defined), the Company agrees to sell an
aggregate of 1,750,000 shares of the Company's Common Stock (the "SHARES") to
the Purchasers, with each purchaser agreeing to purchase the number of Shares
set forth opposite the name of each in EXHIBIT A to this Agreement. As
consideration for the sale of the Shares, each Purchaser shall pay to the
Company $2.3543 per share of Common Stock purchased in U.S. Federal or other
immediately available funds (the "PURCHASE PRICE").

        Section 1.2.  CLOSING.

        (a) Consummation of the purchase and sale transactions contemplated by
this Agreement (the "CLOSING") shall take place at 10:00 a.m. local time on
December 30, 1996 at the offices of the Company located at One Paragon Center,
Suite 625, 450 Gears Road, Houston, Texas 77067-4581, or at such other time and
place as all parties hereto may mutually agree in writing. The date upon which
the Closing occurs is referred to herein as the "CLOSING DATE."

                                        1
<PAGE>
        (b) At the Closing, the Company shall deliver to each Purchaser the
following:

                      (i) the number of shares of Common Stock purchased by such
               Purchaser as evidenced by delivery of a stock certificate
               therefor duly registered in the name of such Purchaser; and

                      (ii) a certificate dated the Closing Date and signed by
               the President and Chief Executive Officer or Senior Vice
               President and Chief Financial Officer of the Company verifying
               that the representations of the Company contained in Article 3
               are true and correct at, and as of, the Closing Date.

        (c) At the Closing, the Purchaser shall deliver to the Company the
following:

                      (i) the Purchase Price in U.S. Federal or other
               immediately available funds to the account of the Company at
               Southwest Bank of Texas, N.A., ABA No. 113011258, A/C 0133191
               (Credit: DI Industries, Inc.); and

                      (ii) a certificate dated the Closing Date and signed by
               Wexford Management, L.L.C., in its capacity as the investment
               advisor of the Purchaser verifying that the representations of
               the Purchaser contained in Article 2 are true and correct at, and
               as of, the Closing Date.

        (d) The obligation of the Company to sell the Shares and close the
transactions contemplated hereby on the Closing Date shall be subject to the
truth and accuracy of the representations and warranties of the Purchaser
contained in Article 2 on and as of the Closing Date, to the performance of each
Purchaser's covenants and agreements to be performed in whole or in part prior
to the Closing Date.

        (e) The obligation of Purchaser to purchase shares of Common Stock and
close the transactions contemplated hereby on the Closing Date shall be subject
to the truth and accuracy of the representations and warranties of the Company
contained in Article 3 on and as of the Closing Date, to the performance of the
Company's covenants and agreements to be performed in whole or in part prior to
the Closing Date, and the following additional conditions precedent:

                      (i) no Material Adverse Effect shall have occurred (as
               defined in Section 3.2;

                      (ii) there shall not have occurred a Change of Control of
               the Company (a "Change of Control" shall mean the acquisition by
               a person, group of affiliated persons or "group" as defined in
               Section 13(d)(3) of the Exchange Act [hereinafter defined] of
               greater than 30% of the fully diluted common equity of the
               Company or a change in the composition of a majority of the
               Company's board of directors).

                                        2
<PAGE>
        (f) The obligations of both Purchaser and the Company hereunder shall be
subject to the following further conditions precedent:

                      (i) the Company shall have entered into a $35,000,000
               Senior Secured Reducing Revolving Credit Facility by and among
               the Company and Drillers, Inc., a wholly-owned subsidiary of the
               Company, as borrowers, and Bankers Trust Company, as agent and
               administrative agent, and ING (US) Capital Corporation, as
               co-agent, for the other lending institutions participating in
               such credit arrangement (the "BANKERS TRUST FACILITY"); and

                      (ii) the Company shall have purchased substantially all of
               the assets of the Diamond M Onshore Drilling Inc. subsidiary of
               Diamond Offshore Drilling Inc., for approximately $26,000,000 and
               shall have borrowed substantially all of the purchase price for
               such assets under the Bankers Trust Facility.

        Section 1.3. ADDITIONAL SHARES. In addition to the Shares issuable to
Purchaser pursuant to Section 1.1, the Company shall issue to Purchaser after
the Determination Date (as defined below) the number shares of the Company's
Common Stock issuable to Purchaser, if any, under the terms and subject to the
conditions set forth in this Section (the "ADDITIONAL SHARES"). The number of
Additional Shares issuable to Purchaser shall be equal to the number of shares
of Common Stock calculated by dividing (i) the Shortfall Amount by (ii) the
Average DI Stock Price during the Measurement Period, as such terms are
hereafter defined. Any fractional share resulting from such calculation shall be
rounded up to the nearest whole share.

               (a) The term "SHORTFALL AMOUNT" shall mean with respect to each
        Purchaser the positive difference, if any, between (i) the Purchase
        Price, MINUS (ii) the sum of (A) the gross proceeds of all Public
        Dispositions less Reasonable Commissions (as such terms are hereinafter
        defined), (B) the gross proceeds of all Private Dispositions less
        Reasonable Commissions (as such terms are hereinafter defined) and (C)
        the product of (x) the Average DI Stock Price during the Measurement
        Period, MULTIPLIED BY (y) the number of Shares that remain beneficially
        owned by Purchaser as of 5:00 p.m. New York, New York time on the
        Determination Date, as such term is hereinafter defined.

               (b) The term "DISPOSITION" shall mean and include a sale,
        assignment, pledge, transfer or other conveyance of some or all (or any
        undivided interest in some or all) of the Common Stock, or any contract
        or option to make any such sale, assignment, pledge, transfer or
        conveyance. The term "PUBLIC DISPOSITION" shall mean a Disposition
        effected by the sale of all or any portion of the Shares on the American
        Stock Exchange or such other principal trading market on which the
        Common Stock is then publicly traded. A Public Disposition shall be
        deemed to occur on the date such transaction occurs rather than the
        settlement date thereof. The term "PRIVATE DISPOSITION" shall mean any
        Disposition that is not a Public Disposition. As used in this Agreement,
        gross proceeds of a Private Disposition shall mean: (i) the fair market
        value of all consideration given by the transferee(s) in such Private

                                        3
<PAGE>
        Disposition; or (ii) if at the time of the Private Disposition resale of
        the Shares is covered by an effective registration statement (which
        shall include for this purpose a resale registration statement as to
        which effectiveness has been temporarily suspended pursuant to the
        Company's right to do so granted in Article 4) the greater of: (A) the
        fair market value of all consideration given by the transferee(s) in
        such Private Disposition, and (B) the product of (y) the Average DI
        Trading Price during the ten Trading Days (hereinafter defined)
        immediately preceding the date of the Private Disposition MULTIPLIED BY
        (x) the number of Shares transferred in such Private Disposition.

               (c) The term "AVERAGE DI STOCK PRICe" shall mean the average of
        the last reported sale price regular way of the Common Stock on the
        American Stock Exchange or other principal trading market on which the
        Common Stock is then publicly traded calculated for the number Trading
        Days over which such average is to be computed, or if the principal
        market on which the Company's Common Stock is then traded does not
        report prices on the basis of sale transactions, the average of the
        closing bid and ask prices for the Common Stock over the applicable
        number of Trading Days.

               (d) The term "MEASUREMENT PERIOD" shall mean the first ten
        Trading Days immediately prior to and including the Determination Date
        on which none of the Purchasers or their respective Affiliates shall
        have sold or offered for sale any shares of the Company's Common Stock
        in any public securities market on which the Company's Common Stock is
        then traded. In the event that any of the Purchasers or their respective
        Affiliates have sold or offered for sale Common Stock on a Trading Day
        that would otherwise be included in the Measurement Period, such Trading
        Day shall be excluded from the Measurement Period and in substitution
        for such day there shall be added to the beginning of the Measurement
        Period the next preceding Trading Day on which no such sales or offers
        were made by any of the Purchasers or their respective Affiliates. For
        purposes of this paragraph (d), an offer of Common Stock shall be deemed
        to have occurred in connection with an underwritten public offering only
        from the period from and including the effective date of the
        registration statement for the offering through and including the
        closing date of such public offering. No offer of Common Stock shall be
        deemed to have occurred for purposes of this paragraph (d) with respect
        to Common Stock covered by a shelf registration statement under Rule 415
        under the Securities Act except on days on which orders for sales of
        Common Stock have been placed by any Purchaser or their respective
        Affiliates on the American Stock Exchange or other principal securities
        market on which the Company's Common Stock may then be publicly traded.

               (e) A "TRADING DAY" shall mean a day on which the Company's
        Common Stock is traded on the American Stock Exchange, or the principal
        trading market on which the Common Stock is then publicly traded if
        other than the American Stock Exchange.

               (f) The "DETERMINATION DATE" shall mean the one year anniversary
        of the Closing Date, unless the Purchasers shall have sold all of the
        Shares before such anniversary

                                        4
<PAGE>
        date, in which event the Determination Date shall be the next Trading
        Day following the final sale of Shares.

               (g) An "AFFILIATE" of a person shall have the meaning ascribed to
        that term in Rule 12b-2 under the Securities Exchange Act of 1934, as
        amended (the "EXCHANGE ACT") as promulgated by the U.S. Securities and
        Exchange Commission (the "SEC").

               (h) Promptly after the Determination Date, but in no event later
        than ten business days after the Determination Date, Purchaser shall
        deliver to the Company an originally executed, written certification
        sworn to and notarized by a duly authorized officer of Purchaser
        containing the following information:

                      (i) a true and complete description of each Public
               Disposition by Purchaser through and including the Determination
               Date, which description shall include the number of Shares
               included in each Public Disposition, the date of each Public
               Disposition, and the amount of gross proceeds from any such
               Public Disposition;

                      (ii) a true and correct description of the character and
               terms of each Private Disposition, including, without limitation,
               the number of Shares included in the Private Disposition, the
               date of such Private Disposition, the amount of all cash
               consideration given by the transferee, and the nature and fair
               market value of all non-cash consideration given by the
               transferee(s) for, or in connection with, such Private
               Disposition; and

                      (iii) the number of Shares that remain beneficially owned
               by Purchaser as of 5:00 p.m. local time in New York, New York on
               the Determination Date, and the owner of record of such Shares if
               other than Purchaser.

        Upon request of the Company, Purchaser shall promptly provide such other
        and further information and documents and affidavits as the Company may
        request to verify the number of Additional Shares, if any, issuable
        pursuant to this Agreement.

               (i) The term "REASONABLE COMMISSION" shall mean actual brokerage
        commissions not exceeding 2% of the gross proceeds of a Public
        Disposition, or 7.5% of the gross proceeds of a Private Disposition.

               (j) Within five business days after being furnished the
        information required to be provided by Purchaser under this Agreement or
        as may be required to assure compliance by the Company with federal and
        applicable state securities laws, the Company shall issue the Additional
        Shares and shall deliver to Purchaser a stock certificate for the
        Additional Shares duly registered in the name of Purchaser. Purchaser
        covenants and agrees that for a

                                        5
<PAGE>
        period of twelve months following each sale of Shares during the
        Determination Period, neither Purchaser nor its Affiliates shall
        purchase any shares of Common Stock.

               (k) Within five business days after being furnished the
        information required to be provided by Purchaser under this Agreement or
        as may be required to assure compliance by the Company with federal and
        applicable state securities laws, the Company may, in its sole
        discretion, in lieu of issuing the Additional Shares, pay to Purchaser
        an amount in cash equal to the Shortfall Amount by wire transfer of
        immediately available funds.

                                    ARTICLE 2
                   REPRESENTATIONS AND WARRANTIES OF PURCHASER

        In order to induce the Company to enter into this Agreement, Purchaser
hereby represents and warrants to the Company as follows:

        Section 2.1. AUTHORITY AND ENFORCEABILITY. The execution and delivery of
this Agreement, and the consummation of the transactions contemplated hereby,
have been duly authorized by all necessary action on the part of the Purchaser.
This Agreement has been duly executed and delivered by the Purchaser and
constitutes the legal, valid, binding and enforceable obligation of the
Purchaser, subject to applicable bankruptcy, insolvency and similar laws
affecting creditors' rights generally, and subject, as to enforceability, to
general principles of equity (regardless of whether enforcement is sought in a
proceeding in equity or at law).

        Section 2.2.  NO CONFLICTS OR CONSENTS.

        (a) The execution and delivery of this Agreement, the purchase by the
Purchaser of the Shares and Additional Shares, and the compliance by the
Purchaser with the provisions hereof do not and will not conflict with, or
result in any violation of or default under, or permit the acceleration of any
obligation under, or the creation or imposition of any lien, claim, security
interest, adverse interest or encumbrance (an "ENCUMBRANCE") on any of the
properties or assets of the Purchaser under (i) any provision of the certificate
of limited partnership or other organizational documents of the Purchaser or any
judgment, order, decree, statute, law, ordinance, rule or regulation of any
governmental authority to which the Purchaser is a party or by which it is
bound, or (ii) any indenture, lease, mortgage, deed of trust, loan agreement or
other agreement or instrument, or any permit, of the Purchaser. No consent,
approval, order or authorization of, or registration, declaration, filing with
or notice to, any Authority (as hereinafter defined) or third party is required
to be made or obtained by the Purchaser in order to execute or deliver this
Agreement or to purchase the Shares and the Additional Shares.

        (b) The Purchaser is not in violation of its certificate of limited
partnership or other organizational documents. There are no legal or
governmental proceedings pending or, to the knowledge of the Purchaser,
threatened against the Purchaser or its investment advisor or to which the
Purchaser or any of its properties or assets is subject, that if adversely
determined, would have

                                        6
<PAGE>
a material adverse effect on the condition, financial or otherwise, business,
operations, affairs, properties, assets or prospects of the Purchaser or that
seeks to restrain or obtain damages with respect to the transactions
contemplated hereby.

        Section 2.3. INVESTMENT REPRESENTATIONS. Purchaser hereby acknowledges
that the Shares and Additional Shares have not been registered under the
Securities Act of 1933, as amended (the "SECURITIES ACT") or registered or
qualified under Texas Securities Act or any other applicable state securities
laws (collectively, "BLUE SKY LAWS") and are being sold pursuant to exemptions
from the registration provisions of the Securities Act and the Blue Sky Laws,
the availability of which depends in substantial part on the accuracy of
Purchaser's representations, warranties and agreements contained in this
Agreement. Accordingly, Purchaser hereby covenants and agrees that it will only
re-offer or resell the Shares and Additional Shares (A) in compliance with the
requirements of Rule 144 under the Securities Act (or any successor rule), (B)
in accordance with another available exemption from the requirements of Section
5 of the Securities Act, or (C) pursuant to an effective registration statement
under the Securities Act. The Purchaser further represents and warrants as
follows:

               (a) Purchaser hereby represents that it is acquiring the Shares
        and Additional Shares for its own account, for investment, and not with
        a view to the distribution thereof. Purchaser, through its undersigned
        investment advisor has such knowledge and experience in financial and
        business matters that it is capable of evaluating the risks and merits
        of an investment in the Company. The acquisition of the Shares and
        Additional Shares pursuant to this Agreement is the result of a
        negotiated transaction involving direct communication between Purchaser
        and officers of the Company. Purchaser acknowledges that it has
        heretofore discussed the Company, its business, plans, operations,
        management, and financial condition with Company's officers. Purchaser
        has received all such information as it deems necessary and appropriate
        to enable it to evaluate the various risks inherent in making an
        investment in the Company and further represents that it has received
        satisfactory and complete information concerning all matters as to which
        it has made inquiry.

               (b) The Purchaser is an "accredited investor" within the meaning
        of Rule 501(a) under the Securities Act.

               (c) Purchaser acknowledges that it has been given access to all
        filings made by the Company pursuant the Securities Act and Exchange Act
        and has been provided copies of the following filings by the Company
        with the SEC: (i) the Company's Annual report on Form 10-K for the year
        ended 1995, (ii) the Company's Quarterly Report on Form 10-Q for the
        quarter ended September 30, 1996, (iii) Current Reports on Form 8-K
        filed by the Company on June 24, October 2, and November 4, 1996, and
        (iv) the Company's Registration Statement under the Securities Act on
        Form S-3 filed December 19, 1996, covering certain resales by certain of
        its shareholders (which as of the date of this Agreement has not yet
        become effective). Purchaser also has been advised by the Company that
        certain important periodic reports and other filings by the Company are
        filed electronically with the

                                        7
<PAGE>
        SEC and are available for inspection at the SEC's site on the World Wide
        Web, the address of which is: HTTP://WWW.SEC.GOV.

               (d) Purchaser represents and warrants that it realizes that its
        acquisition of the Company's Common Stock involves certain risks
        (including those set forth in the Company's Registration Statement on
        Form S-3 filed December 19, 1996), will be a speculative investment, and
        that Purchaser is able, without impairing its financial condition, to
        hold the Shares and Additional Shares for an indefinite period of time
        and to suffer a complete loss of its investment.

               (e) Purchaser hereby represents and agrees that the Shares and
        Additional Shares shall not be sold, transferred, pledged or
        hypothecated except by an effective registration statement under the
        Securities Act unless there is furnished to the Company an opinion in
        form and substance reasonably satisfactory to the Company that
        registration of such Shares and Additional Shares under the Securities
        Act and such Blue Sky Laws is not required, and that each certificate
        evidencing such Shares and Additional Shares shall bear a legend in
        substantially the following form:

               "THE SHARES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN AND
               WILL NOT BE, EXCEPT AS PROVIDED IN THE STOCK PURCHASE AGREEMENT
               REFERRED TO BELOW, REGISTERED UNDER THE SECURITIES ACT OF 1933,
               AS AMENDED (THE "SECURITIES ACT"), OR ANY OTHER APPLICABLE
               FEDERAL OR STATE SECURITIES LAW AND, ACCORDINGLY, THE SHARES
               REPRESENTED BY THIS CERTIFICATE MAY NOT BE RESOLD, PLEDGED, OR
               OTHERWISE TRANSFERRED, EXCEPT PURSUANT TO AN EFFECTIVE
               REGISTRATION STATEMENT UNDER, OR IN A TRANSACTION EXEMPT FROM
               REGISTRATION UNDER, THE SECURITIES ACT AND IN ACCORDANCE WITH ANY
               OTHER APPLICABLE SECURITIES LAWS. THE SHARES REPRESENTED BY THIS
               CERTIFICATE MAY BE TRANSFERRED ONLY PURSUANT TO THE APPLICABLE
               PROVISIONS OF THAT CERTAIN STOCK PURCHASE AGREEMENT DATED AS OF
               DECEMBER 28, 1996. A COMPLETE AND CORRECT CONFORMED COPY OF SUCH
               STOCK PURCHASE AGREEMENT IS AVAILABLE FOR INSPECTION AT THE
               PRINCIPAL EXECUTIVE OFFICE OF THE COMPANY AND WILL BE FURNISHED
               TO THE HOLDER UPON WRITTEN REQUEST AND WITHOUT CHARGE.

        In addition, Purchaser hereby agrees that the Company's stock transfer
        records will contain a notation and stop transfer instructions
        consistent with such legend restricting any such sale, transfer, pledge
        or hypothecation. The foregoing restrictions and related legend
        provisions shall remain in effect until, in the opinion of counsel
        satisfactory to Company, they are no longer required by law.

                                        8
<PAGE>
               (f) Each of Wexford Special Situations 1996, L.P., a Delaware
        limited partnership, Wexford Special Situations 1996 Institutional,
        L.P., a Delaware limited partnership, Wexford-Euris Special Situations
        1996, L.P., a Delaware limited partnership represent that they are
        domiciled in the State of Delaware. Wexford Special Situations 1996
        Limited, a Cayman Islands exempted company, represents that it is
        domiciled in the Cayman Islands.

               (g) Purchaser represents and warrants that it understands that no
        federal or state agency has made any finding or determination as to the
        accuracy or adequacy of the Company's disclosures in the information
        furnished to Purchaser or as to the fairness of the terms of the
        transactions contemplated by this Agreement nor any recommendation or
        endorsement of the Common Stock.

        Section 2.4. NO BROKERS. No broker, finder or investment banker is
entitled to any brokerage, finder's or other fee or commission in connection
with the transactions contemplated hereby based upon arrangements made by or on
behalf of the Purchaser.

                                    ARTICLE 3
                  REPRESENTATIONS AND WARRANTIES OF THE COMPANY

        In order to induce Purchaser to enter into this Agreement, the Company
hereby represents and warrants to Purchaser as follows:

        Section 3.1. DUE ORGANIZATION, ETC. The Company, and each of its
Subsidiaries (as hereinafter defined), is a corporation duly organized, validly
existing and in good standing under the law of the jurisdiction of its
incorporation, is not in liquidation, and each has all requisite corporate power
and authority to own, operate and lease its respective properties and assets and
to conduct its respective business as now conducted. All of the outstanding
shares of capital stock of each Subsidiary of the Company are validly issued,
fully paid and non-assessable, and all of such outstanding shares are owned,
directly or indirectly, by the Company free and clear of all Encumbrances, other
than as may be granted pursuant to the Bankers Trust Facility. "SUBSIDIARY"
means a corporation of more than a majority of the outstanding voting securities
or ownership interests in which are owned, directly or indirectly, by the
Company, by one or more other Subsidiaries, or by the Company and one or more
other Subsidiaries.

        Section 3.2.  COMPLIANCE WITH LAW.

        (a) The Company and each Subsidiary has obtained and maintains in full
force and effect all permits, licenses, consents, approvals, registrations,
memberships, authorizations and qualifications (collectively, "PERMITS") under
all federal, state, local and foreign laws and regulations, and with all
federal, state, local and foreign governmental or regulatory authorities (each,
an "AUTHORITY"), required for the conduct by it of its businesses and the
ownership or

                                        9
<PAGE>
possession by it of its properties and assets other than where the failure to
obtain or maintain such Permits would not, individually or in the aggregate,
have a material adverse effect on the condition, financial or otherwise,
business, operations, affairs, properties, assets or prospects of the Company
and its Subsidiaries taken as a whole (a "MATERIAL ADVERSE EFFECT").

        (b) The Company and each Subsidiary are in compliance with all laws,
regulations, ordinances, orders and decrees of any Authority applicable to the
conduct by the Company and each Subsidiary of their respective businesses and to
their ownership and possession of their respective properties and assets other
than where the failure to comply would not have a Material Adverse Effect.

        Section 3.3.  AUTHORIZATION; EXECUTION AND DELIVERY OF AGREEMENT.

        (a) The execution and delivery of this Agreement, the issuance and sale
of the Shares and the Additional Shares to the Purchaser, the compliance by the
Company with the provisions hereof (including, without limitation, the issuance
of the Additional Shares) are within the corporate power and authority of the
Company and have been duly authorized by all necessary corporate action on the
part of the Company. This Agreement has been duly executed and delivered by the
Company and this Agreement constitutes the legal, valid, binding and enforceable
obligation of the Company, subject to applicable bankruptcy, insolvency and
similar laws affecting creditors' rights generally, and subject, as to
enforceability, to general principles of equity (regardless of whether
enforcement is sought in a proceeding in equity or at law).

        (b) The Shares are, and the Additional Shares (if issued) will be, in
due and proper form, duly authorized by all necessary corporate action on the
part of the Company, and, when issued and delivered by the Company pursuant to
this Agreement against payment of the consideration therefor set forth herein,
the Shares and the Additional Shares will be validly issued, fully paid and
non-assessable. The Purchaser will acquire valid and marketable title to the
Shares and the Additional Shares, free and clear of any Encumbrances except as
contemplated by this Agreement.

        Section 3.4.  NO CONFLICTS; NO CONSENTS; NO LITIGATION.

        (a) Except for consents as may be required under the Bankers Trust
Facility which will be obtained on or before funding of the Bankers Trust
Facility and the subsequent requirement for listing of the Shares and Additional
Shares on the American Stock Exchange pursuant to the Company's listing
agreement, the execution and delivery of this Agreement, the issuance and sale
of the Shares and Additional Shares to the Purchaser, and the compliance by the
Company with the provisions hereof do not and will not conflict with, or result
in any violation of or default under, or permit the acceleration of any
obligation under, or the creation or imposition of any Encumbrance on any of the
properties or assets of the Company or any Subsidiary under, (i) any provision
of the certificate of incorporation or by-laws of the Company or any Subsidiary,
or any judgment, order, decree, statute, law, ordinance, rule or regulation of
any Authority to which the

                                       10
<PAGE>
Company or any of its Subsidiaries is a party or by which any of them is bound,
or (ii) any indenture, lease, mortgage, deed of trust, loan agreement or other
agreement or instrument, or any Permit, of the Company or any Subsidiary. No
consent, approval, order or authorization of, or registration, declaration,
filing with or notice to, any Authority or third party is required to be made or
obtained by the Company or any Subsidiary in order to execute or deliver this
Agreement or to issue and sell the Shares and the Additional Shares other than
as a result of the periodic reporting requirements under the Exchange Act and
the listing requirements of the American Stock Exchange.

        (b) The Company and each Subsidiary are not in violation of their
certificates of incorporation or by-laws or other organizational documents
except for such violations that would not have a Material Adverse Effect or an
adverse effect on the benefits intended to be afforded to the Purchaser under
this Agreement.

        (c) There are no legal or governmental proceedings pending or, to the
knowledge of the Company and each Subsidiary, threatened against the Company,
any Subsidiary or any officer thereof, or to which the Company, any Subsidiary
or any of its or their properties or assets is subject, that if adversely
determined, would have a Material Adverse Effect.

        Section 3.5.  CAPITAL STOCK.

        (a) The authorized capital stock of the Company consists of 300,000,000
shares of Common Stock, par value $.10 per share and 1,000,000 shares of
preferred stock, par value $1.00 per share. At December 26, 1996, 123,283,934
shares of Common Stock and 90,000 shares of the Company's preferred stock were
issued and outstanding.

        (b) There are no authorized or outstanding subscriptions, options,
conversion rights, warrants or other agreements, securities or commitments of
any nature whatsoever (whether oral or written and whether firm or conditional)
obligating the Company or any Subsidiary to issue, deliver or sell, or cause to
be issued, delivered or sold, to any Person any material number of shares of
Common Stock or any other shares of the capital stock of the Company or any
shares of the capital stock of any Subsidiary, or any securities convertible
into or exchangeable for any such shares, or obligating any such Person to
grant, extend or enter into any such agreement or commitment, except: (A) as
publicly disclosed in the SEC Reports (hereinafter defined); and (B) shares of
Common Stock that may become issuable by the Company pursuant to a proposed
Asset Purchase Agreement currently under negotiation between Drillers, Inc. and
Flournoy Drilling Company, the proposed terms of which have been confidentially
disclosed to Purchaser.

        Section 3.6. SEC REPORTS. The Company has filed with the Securities and
Exchange Commission all proxy statements and periodic reports required to be
filed by it under the Exchange Act (collectively, the "SEC REPORTS"). The
Company has furnished or made available to the Purchaser copies of the SEC
Reports, each as filed with the Commission. Each SEC Report was in compliance in
all material respects with the then applicable requirements of the Exchange

                                       11
<PAGE>
Act and the rules and regulations of the Commission thereunder and did not on
the date of its filing (and the SEC Reports as a whole will not on the Closing
Date, except as otherwise disclosed to the Purchaser), contain any untrue
statement of a material fact or omit to state a material fact required to be
stated therein or necessary to make the statements therein, in light of the
circumstances under which they were made, not misleading. Since the filing of
the Company's most recent Quarterly Report on Form 10-Q, there has been no
material adverse change in the business, assets, results of operations or
condition (financial or other) of the Company and its subsidiaries considered as
a whole, which would require the filing by the Company with the SEC of a Current
Report on Form 8-K, except as have been previously filed.

        Section 3.7. NO BROKERS. No broker, finder or investment banker is
entitled to any brokerage, finder's or other fee or commission in connection
with the transactions contemplated hereby based upon arrangements made by or on
behalf of the Company.

        Section 3.8. USE OF PROCEEDS. The Company will use the proceeds from the
sale of Shares for the repayment of that certain Promissory Note dated August
29, 1996, by the Company as maker and Cloudesly Shipping Ltd. ("CLOUDESLY") as
payee, in the original principal amount of $4,000,000 and bearing interest at
12% per annum, which promissory note was acquired by Cloudesly by mesne
assignments from Norex Drilling Ltd, a Bermuda corporation.

                                    ARTICLE 4
                               REGISTRATION RIGHTS

        Section 4.1. SHELF REGISTRATION RIGHTS. The Company covenants and agrees
that on or before 30 days after the Closing, and on or before 30 days after the
issuance date of the Additional Shares, if any, the Company will cause to be
filed pursuant to Rule 415 of the Securities Act a shelf registration statement
on Form S-3 or such other form for which it is otherwise then eligible (a "SHELF
REGISTRATION STATEMENT") as to the Shares and Additional Shares naming Purchaser
as the selling shareholder along with such other selling shareholders which the
Company chooses to include therein. The Company shall use commercially
reasonable efforts to have such Shelf Registration Statement declared effective
as soon as reasonably practicable after such filing, and to keep such Shelf
Registration Statement continuously effective until the first to occur of: (a)
all Shares or Additional Shares covered thereby have been resold; (b) the date
on which the Shares or Additional Shares may be resold without registration
under the Securities Act pursuant to Rule 144 or any successor rule, or (c) two
years following the Closing in the case of the Shares and two years from the
issuance of the Additional Shares in the case of the Additional Shares;
PROVIDED, HOWEVER, the Company may voluntarily suspend the effectiveness of such
Registration Statement for a limited time, which in no event shall be longer
than 90 days during any twelve month period, if the Company has been advised by
legal counsel that the offering of the shares of Common Stock pursuant to any
such Shelf Registration Statement would adversely affect, or would be improper
in view of (or improper without disclosure in a prospectus), a proposed
financing, a reorganization, recapitalization, merger, consolidation, or similar
transaction involving the Company or its subsidiaries, in which event the
Company shall be required to keep such Shelf

                                       12
<PAGE>
Registration Statement effective for an additional period of time beyond such
two year period for an additional period of time equal to the number of days the
effectiveness thereof has been suspended pursuant to this proviso or Section
4.6. The Company, if so requested by Purchaser, will cause its counsel to
confirm in writing that it has rendered such advice to the Company.

        Section 4.2. INCIDENTAL REGISTRATION RIGHTS. If, within twelve months
after the Closing Date, the Company proposes to file a registration statement
relating to any of the Company's capital stock under the Act (other than a
registration statement required to be filed in respect of employee benefit plans
of the Company on Form S-8 or any similar form from time to time in effect, any
registration statement on Form S-4 or similar successor form, or a registration
statement filed in respect of Common Stock of the Company solely for purposes of
making acquisitions) the Company shall, at least 14 days (or if such 14 day
period is not practicable, then a reasonable shorter period which shall not be
less than seven days) prior to such filing, give written notice of such proposed
filing to Purchaser. Upon receipt by the Company not more than seven days
(unless the notice given to Purchaser pursuant to the previous sentence is less
than ten days, in which case such seven-day period shall be shortened to three
days) after such notice of a written request from Purchaser for registration of
Shares, (i) the Company shall include such Shares in such registration statement
or in a separate registration statement concurrently filed, and shall use
commercially reasonable efforts to cause such registration statement to become
effective with respect to such Shares, and (ii) if such proposed registration is
in connection with an underwritten offering of Common Stock, upon request of
Purchaser, the Company shall cause the managing underwriter therefor to include
in such offering the Shares as to which Purchaser requests such inclusion, on
terms and conditions comparable to those of the securities offered on behalf of
the Company or on behalf of any stockholder of the Company; PROVIDED, HOWEVER,
that if the managing underwriter therefor concludes that the number of shares to
be registered for selling shareholders (including Purchaser) would materially
adversely affect such offering, the number of Shares to be registered, together
with the number of shares of Common Stock or other securities held by other
shareholders proposed to be registered in such offering, shall be reduced on a
pro rata basis based on the number of Shares proposed to be sold by Purchaser as
compared to the number of shares proposed to be sold by all shareholders.

        Section 4.3. INFORMATION, DOCUMENTS, ETC. In connection with any
registration pursuant to this Article, Purchaser shall furnish to the Company
such information regarding its holdings and the proposed manner of distribution
thereof as the Company may reasonably request and as shall be required in
connection with any registration, qualification or compliance referred to in
this Article. The Company agrees that it will furnish to Purchaser the number of
prospectuses, or other documents, or any amendments or supplements thereto,
incident to any registration, qualification or compliance referred to in this
Article as Purchaser from time to time may reasonably request.

        Section 4.4. EXPENSES OF REGISTRATION. The Company will bear all
expenses of registrations pursuant to this Article including, without
limitation, registration fees, printing expenses, expenses of compliance with
Blue Sky or other state securities laws, and legal and audit

                                       13
<PAGE>
fees incurred by the Company and Purchaser in connection with such registration
and amendments or supplements in connection therewith. Underwriters' fees,
commissions and discounts and the fees and expenses of legal counsel, if any,
for Purchaser shall not be considered registration expenses for purposes hereof,
except as provided in Section 5.3.

        Section 4.5. COOPERATION. In connection with any registration of Common
Stock pursuant to Section 4.2, the Company agrees to:

               (a) enter into such customary agreements (including an
        underwriting agreement containing such representations and warranties by
        the Company and such other terms and provisions, as are customarily
        contained in underwriting agreements for comparable offerings) and take
        all such other actions as Purchaser or the underwriters, if any,
        participating in such offering and sale may reasonably request in order
        to expedite or facilitate such offering and sale;

               (b) furnish, at the request of Purchaser or any underwriters
        participating in an underwritten offering pursuant to Section 4.2, a
        comfort letter or letters, dated the date of the final prospectus and
        the date of the closing from the independent certified public
        accountants of the Company and addressed to Purchaser and any
        underwriters participating in such offering and sale, which letter or
        letters shall state that such accountants are independent and shall
        address such matters as Purchaser and underwriters may reasonably
        request and as may be customary in transactions of a similar nature for
        similar entities and an opinion, dated the date of the closing, of the
        counsel representing the Company with respect to such offering and sale,
        addressed to Purchaser and any such underwriters, which opinion shall
        address such matters as Purchaser and any underwriters may reasonably
        request and as may be customary in transactions of a similar nature for
        similar entities; and

               (c) make available for inspection by Purchaser, the underwriters,
        if any, participating in such offering and sale, or any other agent
        retained by Purchaser or such underwriters, all financial and other
        records, corporate documents and properties of the Company, and supply
        such additional information, as they shall reasonably request.

        Section 4.6.  SUSPENSION OF EFFECTIVENESS; SUPPLEMENTS.

               (a) The Company will notify Purchaser promptly of (i) any action
        by the SEC to suspend the effectiveness of any registration statement
        filed pursuant to this Article or the initiation or threatened
        initiation of any proceeding for such purpose (a "stop order") or (ii)
        the receipt by the Company of any notification with respect to the
        suspension of the qualification of the Shares or Additional Shares for
        sale in any jurisdiction or the initiation or threatened initiation of
        any proceeding for such purpose (a "suspension"). Immediately upon
        receipt of any such notice, Purchaser shall cease to offer or sell any
        Shares or Additional Shares pursuant to the registration statement in
        the jurisdiction to which such stop order or suspension relates. The
        Company will use commercially reasonable efforts

                                       14
<PAGE>
        to prevent the issuance of any such stop order or suspension and, if any
        such stop order or suspension is issued, to obtain as soon as possible
        the withdrawal or revocation thereof, and will notify Purchaser at the
        earliest practicable date of the date on which Purchaser may offer and
        sell pursuant to the registration statement.

               (b) Following the effectiveness of a registration statement
        covering the reoffer or resale of Shares or Additional Shares, the
        Company will notify Purchaser promptly of the occurrence of any event or
        the existence of any state of facts that, in the judgment of the
        Company, should be set forth in (or incorporated by reference in) such
        registration statement. Immediately upon receipt of such notice,
        Purchaser shall cease to offer or sell any Shares or Additional Shares
        pursuant to such registration statement, cease to deliver or use such
        registration statement and, if so requested by the Company, return to
        the Company, all copies (other than permanent file copies) of such
        registration statement. The Company shall take such commercially
        reasonable action as may be necessary to promptly amend or supplement
        such registration statement in order to set forth or reflect such event
        or state of facts. The Company will thereafter furnish such number of
        copies of such amendment or supplement to Purchaser as Purchaser may
        reasonably request.

        Section 4.7.  INDEMNIFICATION.

               (a) The Company agrees to indemnify and hold harmless Purchaser
        and each Person, if any, who controls Purchaser within the meaning of
        Section 15 of the Securities Act or Section 20 of the Exchange Act from
        and against any and all losses, claims, damages, liabilities and
        expenses (including, without limiting the foregoing but subject to
        Section 4.7(c) hereof, the reasonable legal and other expenses incurred
        in connection with any action, suit or proceeding or any claim asserted)
        arising out of or based upon any untrue statement or alleged untrue
        statement of a material fact contained in any registration statement or
        the related prospectus (as amended or supplemented if the Company shall
        have furnished any amendments or supplements thereto) or any preliminary
        prospectus filed pursuant to this Article 4, or arising out of or based
        upon any omission or alleged omission to state therein a material fact
        required to be stated therein or necessary to make the statements
        therein, in the light of the circumstances under which they were made in
        the case of the prospectus, not misleading, except insofar as such
        losses, claims, damages, liabilities or expenses are caused directly by
        an untrue statement or omission contained in information relating to
        Purchaser, furnished to the Company by or on behalf of Purchaser for use
        therein. In connection with any underwritten offering, the Company will
        also indemnify the underwriters participating in the distribution, their
        officers and directors and each Person who controls such Persons (within
        the meaning of the Securities Act and the Exchange Act) to the same
        extent as provided above with respect to the indemnification of
        Purchaser, if requested in connection with any registration statement.

               (b) As a condition to the inclusion of Shares or Additional
        Shares in any registration statement pursuant to this Agreement,
        Purchaser will furnish to the Company

                                       15
<PAGE>
        in writing, promptly after receipt of a request therefor, such
        information as the Company may reasonably request for use in connection
        with any registration statement, prospectus or preliminary prospectus
        and agrees to indemnify and hold harmless, severally and not jointly,
        the Company, the underwriters and their respective officers and
        directors, and any Person controlling the Company and such Underwriters
        within the meaning of Section 15 of the Securities Act or Section 20 of
        the Exchange Act to the same extent as the indemnity from the Company to
        Purchaser and Persons controlling Purchaser, but only with reference to
        information relating specifically to Purchaser furnished by or on behalf
        of Purchaser for use in such registration statement or the prospectus or
        any preliminary prospectus included therein. In case any action shall be
        brought against the Company, or any such controlling Person based on the
        registration statement, the prospectus or any preliminary prospectus and
        in respect of which indemnity may be sought against Purchaser, Purchaser
        shall have the rights and duties given to the Company by Section 4.7(c)
        hereof (except that if the Company as provided in Section 4.7(c) hereof
        shall have assumed the defense thereof Purchaser shall not be required
        to do so, but may employ separate counsel therein and participate in the
        defense thereof but the fees and expenses of such counsel shall be at
        Purchaser's expense) and the Company and its directors, any such
        officers, and any such controlling Person shall have the rights and
        duties given by Section 4.7(c) hereof. In no event shall the liability
        of Purchaser hereunder be greater than the net proceeds received by
        Purchaser upon the Disposition of the Shares or Additional Shares giving
        rise to such indemnification obligation.

               (c) In case any action or proceeding (including any governmental
        or regulatory investigation or proceeding) shall be brought against
        Purchaser or any Person controlling Purchaser, with respect to which
        indemnity may be sought against the Company pursuant to Section 4.7(a)
        hereof, Purchaser shall promptly notify the Company in writing and the
        Company shall assume the defense thereof, including the employment of
        counsel reasonably satisfactory to Purchaser and payment of all fees and
        expenses relating thereto. Purchaser and such Persons controlling
        Purchaser shall have the right to employ separate counsel in any such
        action or proceeding and participate in the defense thereof, but the
        fees and expenses of such counsel shall be at Purchaser's expense unless
        (i) the employment of such counsel has been specifically authorized in
        writing by the Company, (ii) the Company has not assumed the defense and
        employed counsel reasonably satisfactory to Purchaser within 30 days
        after notice of any such action or proceeding, or (iii) the named
        parties to any such action or proceeding (including any impleaded
        parties) include both Purchaser or any Person controlling Purchaser and
        the Company and Purchaser or any Person controlling Purchaser shall have
        been advised by the Company's counsel that there may be one or more
        legal defenses available to Purchaser or such Person controlling
        Purchaser that are different from or additional to those available to
        the Company and that counsel for the Purchaser reasonably believes that
        the assertion of such different or additional defenses is inconsistent
        with the assertion by the Company of defenses available to the Company,
        it being understood, however, that the Company shall not, in connection
        with any one such action or separate but substantially similar or
        related actions in the same jurisdiction arising

                                       16
<PAGE>
        out of the same general allegations or circumstances, be liable for the
        reasonable fees and expenses of more than one separate firm of attorneys
        (in addition to all local counsel which is necessary, in the good faith
        opinion of both counsel for the indemnifying party and counsel for the
        indemnified party in order to adequately represent the indemnified
        parties) for Purchaser and controlling Persons. The Company shall not be
        liable for any settlement of any such action effected without the
        written consent of the Company, but if settled with the written consent
        of the Company or if there is a final judgment for the plaintiff, the
        Company agrees to indemnify and hold harmless Purchaser and all Persons
        controlling Purchaser from and against any loss or liability by reason
        of such settlement or judgment. The Company shall not, without the prior
        written consent of Purchaser, effect any settlement of any pending or
        threatened proceeding in respect of which Purchaser or any Person
        controlling Purchaser is a party and indemnity has been sought hereunder
        by Purchaser or any Person controlling Purchaser unless such settlement
        includes an unconditional release of Purchaser or such controlling
        Person from all liability on claims that are the subject matter of such
        proceeding.

               (d) If the indemnification provided for in this Section is
        unavailable to an indemnified party under paragraphs (a) or (b) hereof
        in respect of any losses, claims, damages, liabilities or expenses
        referred to therein, then each indemnifying party, in lieu of
        indemnifying such indemnified party, shall contribute to the amount paid
        or payable by such indemnified party as a result of such losses, claims,
        damages, liabilities and expenses in such proportion as is appropriate
        to reflect the relative benefits received by the Company on the one hand
        and Purchaser on the other hand from the original sale by the Company of
        the Shares or Additional Shares, or if the allocation provided by clause
        (i) above is not permitted by applicable law, in such proportion as is
        appropriate to reflect not only the relative benefits referred to in
        clause (i) above but also the relative fault of the Company on the one
        hand and Purchaser on the other hand in connection with the statements
        or omissions which resulted in such losses, claims, damages, liabilities
        or expenses, as well as any other relevant equitable considerations. The
        relative fault of the Company on the one hand and Purchaser on the other
        hand shall be determined by reference to, among other things, whether
        the untrue or alleged untrue statement of a material fact or the
        omission to state a material fact relates to information supplied by the
        Company on the one hand or by Purchaser on the other hand and the
        parties' relative intent, knowledge, access to information and
        opportunity to correct or prevent such statement or omission. The amount
        paid or payable by an indemnified party as a result of the losses,
        claims, damages, liabilities or expenses shall be deemed to include,
        subject to the limitations set forth above, any legal or other expenses
        reasonably incurred by such indemnified party in connection with
        investigating or defending any such action or claim.

               (e) The Company and Purchaser agree that it would not be just and
        equitable if contribution pursuant to this Section were determined by a
        pro rata allocation or by any other method of allocation that does not
        take account of the equitable considerations referred to in paragraph
        (d) above. The amount paid or payable by an indemnified party

                                       17
<PAGE>
        as a result of the loses, claims, damages, liabilities and expenses
        referred to in paragraph (d) above shall be deemed to include, subject
        to the limitations set forth above, any legal or other expenses
        reasonably incurred by such indemnified party in connection with
        investigating any claim or defending any such action, suit or
        proceeding. Notwithstanding any other provision of this Agreement,
        Purchaser shall not be required to contribute an amount greater than the
        gross proceeds received by Purchaser with respect to the sale of Shares
        or Exercise Shares giving rise to any indemnification or contribution
        obligation under this Section. No person guilty of fraudulent
        misrepresentation (within the meaning of Section 11(f) of the Securities
        Act) shall be entitled to contribution from any person who was not
        guilty of such fraudulent misrepresentation.

        Section 4.8. TRANSFERS OF REGISTRATION RIGHTS. The rights granted to
Purchaser under this Article may be transferred or succeeded to on one occasion
only by an Affiliate of Purchaser or a transferee who acquires at least 50% of
the total number of Shares and 50% of the total number of Additional Shares, if
any, issued to all Purchasers; PROVIDED, HOWEVER, that the Company shall be
given written notice prior to or promptly following such transfer stating the
name and address of the transferee and identifying the securities with respect
to which such rights are being assigned. Such notice shall include or be
accompanied by a written undertaking by the transferee to comply with the
obligations imposed on Purchaser under this Agreement. In the event any
registration rights are transferred in accordance with the terms hereof, any
actions required to be taken by Purchaser will be taken with the approval of the
holders of such registration rights who hold a majority of the Shares, whose
action shall bind all such holders of registration rights.

                                    ARTICLE 5
                                  MISCELLANEOUS

        Section 5.1. FURTHER ASSURANCES. From time to time, as and when
requested by any party hereto, any other party hereto shall execute and deliver,
or cause to be executed and delivered, such documents and instruments and shall
take, or cause to be taken, such further or other actions as may be reasonably
necessary to effectuate the transactions contemplated hereby, including, without
limitation, the assuring, transferring and assigning unto the Company of the
Indebtedness, and the protection of the right, title and interest of Buyer in
and to, the Indebtedness.

        Section 5.2. PUBLIC ANNOUNCEMENTS. Except as mutually agreed, neither
Purchaser nor any of its respective Affiliates or agents shall issue any press
release or public announcement regarding the execution of this Agreement or the
transactions contemplated hereby. If and to the extent that the Company is
advised by legal counsel that the transactions contemplated hereby must be
publicly disclosed by press releases, filings with the SEC or otherwise, the
Company may do so.

        Section 5.3. EXPENSES. The Company and Purchaser shall bear their own
respective legal and accounting fees, and other costs and expenses with respect
to the negotiation, execution and delivery of this Agreement, and consummation
of the transactions contemplated hereby; PROVIDED, HOWEVER, that the Company
will agree to reimburse up to $15,000 of the Purchasers' out-of-pocket

                                       18
<PAGE>
expenses for the fees of outside legal counsel in connection with the execution
and delivery of this Agreement and the exercise of Purchasers' registration
rights under this Agreement. Such expense reimbursement shall be made from time
to time promptly after the Company receives documentation supporting such
reimbursable expenses.

        Section 5.4. NOTICES AND WAIVERS. Any notice, instruction,
authorization, request, demand or waiver hereunder shall be in writing, and
shall be delivered either by personal delivery, by telegram, telex, telecopy or
similar facsimile means, by certified or registered mail, return receipt
requested, or by courier or delivery service, addressed to the parties hereto at
the address set forth below, or at such other address and number as a party
shall have previously designated by written notice given to the other parties in
the manner set forth in this Section:

        For notices to Purchaser:

               [Name of Purchaser]
               c/o Wexford Management, L.L.C.
               411 West Putnam
               Greenwich, Connecticut  06380
               FAX:  203-862-7310
               Attention:  Robert Holtz, Senior Vice President

        For notices to the Company:

               DI Industries, Inc.
               625 Paragon Center One
               450 Gears Road
               Houston, Texas  77067-4581
               FAX:  713-874-0195
               Attention:  President

Notices shall be deemed given when received, if sent by facsimile means
(confirmation of such receipt by confirmed facsimile transmission being deemed
receipt of communications sent by facsimile means); and when delivered and
receipted for (or upon the date of attempted delivery where delivery is
refused), if hand-delivered, sent by express courier or delivery service, or
sent by certified or registered mail, return receipt requested.

        Section 5.5. SURVIVAL; ASSIGNMENT; CERTAIN REFERENCES. The respective
representations, warranties and agreements of the parties contained herein shall
survive the Closing for a period of two years; PROVIDED, HOWEVER, that there
shall be no expiration of any such representation, warranty or agreement as to
which a bona fide claim has been asserted by written notice of such claim
delivered to the party making such representation or warranty during the
survival period. This Agreement shall not be assignable or delegable by any
party without the consent of the other. Unless otherwise specified, all
references herein to days, weeks, months or years shall be to calendar days,

                                       19
<PAGE>
weeks, months or years. Whenever the context requires, the gender of all words
used herein shall include the masculine, feminine and neuter, and the number of
all words shall include the singular and plural. The headings and captions used
in this Agreement are solely for convenient reference and shall not affect the
meaning or interpretation of any article, section or paragraph herein, or this
Agreement. The terms "hereof," "herein" or "hereunder" shall refer to this
Agreement as a whole and not to any particular article, section or paragraph.
The terms "including" or "include" are used herein in an illustrative sense and
not to limit a more general statement. When computing time periods described by
a number of days before or after a stated date or event, the stated date or date
on which the specified event occurs shall not be counted and the last day of the
period shall be counted. Time is of the essence in the performance of this
Agreement.

        Section 5.6.  APPLICABLE LAW.  THIS AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK AND
OF THE UNITED STATES APPLICABLE IN NEW YORK.

        Section 5.7. DISPUTE RESOLUTION; SEVERABILITY; JUDICIAL MODIFICATION.
The parties expressly intend, desire and agree that any dispute arising out of,
or in connection with any term or provision of this Agreement or the issuance of
the Shares or Additional Shares shall be resolved by binding arbitration in New
York, New York in accordance with the Commercial Rules of the American
Arbitration Association then in effect; that judgment on the award rendered by
the arbitrator(s) may be entered in any court of competent jurisdiction; and
that if any such dispute is pending in any court, the parties agree to move that
the court refer the matter to such arbitration. If any term, provision,
covenant, or restriction of this Agreement (including any arbitration provision
of this Section 5.7) is held by a court of competent jurisdiction to be invalid,
void, or unenforceable, the remainder of this Agreement and the other terms,
provisions, covenants and restrictions hereof shall remain in full force and
effect and shall in no way be affected, impaired or invalidated.

        Section 5.8. AMENDMENT AND ENTIRETY. This Agreement may be amended,
modified, or superseded only by written instrument executed by all parties
hereto. This Agreement and that certain letter agreement respecting the
confidentiality of certain information provided to the Purchaser or its
Affiliates by the Company set forth the entire agreement and understanding of
the parties with respect to the transactions contemplated hereby and supersede
all prior agreements, arrangements, and understandings relating to the subject
matter hereof. Nothing in this Agreement, whether express or implied, is
intended to confer any rights or remedies under or by reason of this Agreement
on any Persons other than the parties hereto and their permitted successors and
assigns, nor shall any provision give any third Persons any right of subrogation
or action over against any party to this Agreement. Without limiting the
generality of the foregoing, it is expressly understood that this Agreement does
not create any third party beneficiary rights.

        Section 5.9. COUNTERPARTS; FACSIMILE DELIVERY. This Agreement may be
executed in any number of counterparts, each of which shall be deemed an
original and all which together shall constitute one and the same instrument.
This Agreement shall be deemed for all purposes to have been executed and
delivered by a party hereto if a copy of this Agreement bearing the facsimile

                                       20
<PAGE>
signature of an officer of such party is transmitted electronically or delivered
to the other party and such Agreement bearing a facsimile signature shall be
considered for all purposes to have the same effect as a duly executed and
delivered Agreement bearing the original, manual signature of the signatory
thereto.

        IN WITNESS WHEREOF, this Stock Purchase Agreement is executed and
delivered as of the day first above written.
<TABLE>
<CAPTION>
<S>                                                 <C>
                                                    DI INDUSTRIES, INC.

                                                    By:/s/ T. SCOTT O'KEEFE
                                                           T. Scott O'Keefe, Senior Vice
                                                           President and Chief Financial Officer


WEXFORD SPECIAL SITUATIONS 1996,                    WEXFORD-EURIS SPECIAL SITUATIONS
L.P., a Delaware limited partnership                1996, L.P., a Delaware limited partnership

By:   WEXFORD MANAGEMENT, L.L.C.,                   By:   WEXFORD MANAGEMENT, L.L.C.,
      its Investment Advisor                              its Investment Advisor

By:/s/ROBERT HOLTZ                                  By:/s/ROBERT HOLTZ
      Robert Holtz, Senior Vice President                 Robert Holtz, Senior Vice President


WEXFORD SPECIAL SITUATIONS 1996                     WEXFORD SPECIAL SITUATIONS 1996
INSTITUTIONAL, L.P., a Delaware limited             LIMITED, a Cayman Island exempted
partnership                                         company

By:   WEXFORD MANAGEMENT, L.L.C.,                   By:   WEXFORD MANAGEMENT, L.L.C.,
      its Investment Advisor                              its Investment Advisor

By:/s/ROBERT HOLTZ                                  By:/s/ROBERT HOLTZ
      Robert Holtz, Senior Vice President                 Robert Holtz, Senior Vice President
</TABLE>
                                       21
<PAGE>
                                    EXHIBIT A
<TABLE>
<CAPTION>
                                                       Shares of               Purchase
                   PURCHASER                     COMMON STOCK PURCHASED          PRICE
                                               --------------------------    -------------
                                                 NUMBER           %       
<S>                                            <C>              <C>          <C>          
Wexford Special Situations 1996, L.P., a                                  
Delaware limited partnership ...............   1,175,300        67.16%       $2,767,008.79
Wexford Special Situations 1996                                           
Institutional, L.P., a Delaware limited                                   
partnership ................................     214,550        12.26%          505,115.07
Wexford-Euris Special Situations 1996, L.P.,                              
a Delaware limited partnership .............     301,350        17.22%          709,468.30
Wexford Special Situations 1996 Limited, a                                
Cayman Island exempted company .............      58,800         3.36%          138,432.84
                                               ---------    ---------        -------------
                                               1,750,000       100.00%       $4,120,025.00
                                               =========    =========        =============
</TABLE>
                                       22

               SENIOR SECURED REDUCING REVOLVING CREDIT AGREEMENT

                                      among

                        DI INDUSTRIES, INC., AS BORROWER,

                          DRILLERS, INC., AS BORROWER,

                     THE SUBSIDIARY GUARANTORS NAMED HEREIN,

                     THE LENDING INSTITUTIONS LISTED HEREIN,

                             BANKERS TRUST COMPANY,

                       AS AGENT AND ADMINISTRATIVE AGENT,

                                       and

                          ING (US) CAPITAL CORPORATION,

                                  AS CO-AGENT.

                          Dated as of December 31, 1996

                            ------------------------
<PAGE>
                                TABLE OF CONTENTS
                                -----------------
                                                           Page
                                                           ----
SECTION 1.   Amount and Terms of Credit .................    1
     1.01    Commitments ................................    1
     1.02    Minimum Borrowing Amounts, etc. ............    2
     1.03    Notice of Borrowing ........................    2
     1.04    Disbursement of Funds ......................    3
     1.05    Notes ......................................    4
     1.06    Conversions ................................    4
     1.07    Pro Rata Borrowings ........................    5
     1.08    Interest ...................................    5
     1.09    Interest Periods ...........................    6
     1.10    Increased Costs, Illegality, etc. ..........    8
     1.11    Compensation ...............................   10
     1.12    Change of Lending Office ...................   11
     1.13    Replacement of Lenders .....................   12
     1.14    Joint and Several Liability ................   13

SECTION 2.   Letters of Credit ..........................   15
     2.01    Letters of Credit ..........................   15
     2.02    Letter of Credit Requests; Notices of
               Issuance .................................   17
     2.03    Agreement to Repay Letter of Credit
               Drawings .................................   17
     2.04    Letter of Credit Participations ............   18
     2.05    Increased Costs ............................   21

SECTION 3.   Fees; Commitments ..........................   22
     3.01    Fees .......................................   22
     3.02    Voluntary Termination or Reduction of
               Total Unutilized Revolving Loan
               Commitment ...............................   23
     3.03    Mandatory Reduction of Revolving Loan
               Commitments ..............................   23

SECTION 4.   Payments ...................................   24
     4.01    Voluntary Prepayments ......................   24
     4.02    Mandatory Prepayments ......................   25
     4.03    Method and Place of Payment ................   27
     4.04    Net Payments ...............................   27

SECTION 5.   Conditions Precedent .......................   30
     5.01    Execution of Agreement; Notes ..............   30

                                       -i-
<PAGE>
                                                           Page
                                                           ----
     5.02    No Default; Representations and
               Warranties ...............................   30
     5.03    Officer's Certificate ......................   31
     5.04    Opinions of Counsel ........................   31
     5.05    Corporate Proceedings ......................   31
     5.06    Adverse Change, etc. .......................   32
     5.07    Litigation .................................   32
     5.08    Approvals ..................................   32
     5.09    Consummation of the Acquisition ............   33
     5.10    Existing Credit Agreement ..................   33
     5.11    Security Documents .........................   33
     5.12    Payment of Fees ............................   34
     5.13    Existing Indebtedness Agreements ...........   35
     5.14    Solvency Certificate; Evidence of
               Insurance ................................   35
     5.15    Rig Appraisals..............................   36
     5.16    Environmental Report .......................   36
     5.17    Pro Forma Balance Sheet ....................   36
     5.18    Notice of Borrowing; Letter of Credit
               Request ..................................   37

SECTION 6.   Representations, Warranties and
               Agreements ...............................   37
     6.01    Corporate Status ...........................   37
     6.02    Corporate Power and Authority ..............   38
     6.03    No Violation ...............................   38
     6.04    Litigation .................................   38
     6.05    Use of Proceeds; Margin Regulations ........   39
     6.06    Governmental Approvals .....................   39
     6.07    Investment Company Act .....................   39
     6.08    Public Utility Holding Company Act .........   40
     6.09    True and Complete Disclosure ...............   40
     6.10    Financial Condition; Financial
               Statements ...............................   40
     6.11    Security Interests .........................   42
     6.12    Acquisition ................................   42
     6.13    Compliance with ERISA ......................   42
     6.14    Capitalization .............................   44
     6.15    Subsidiaries ...............................   44
     6.16    Intellectual Property ......................   44
     6.17    Compliance with Statutes, etc. .............   45
     6.18    Environmental Matters ......................   45
     6.19    Properties .................................   46
     6.20    Labor Relations ............................   46
     6.21    Tax Returns and Payments ...................   47
     6.22    Existing Indebtedness ......................   47

                                      -ii-
<PAGE>
                                                           Page
                                                           ----
SECTION 7.   Affirmative Covenants ......................   48
     7.01    Information Covenants ......................   48
     7.02    Books, Records and Inspections .............   52
     7.03    Insurance ..................................   52
     7.04    Payment of Taxes ...........................   53
     7.05    Corporate Franchises .......................   53
     7.06    Compliance with Statutes, etc. .............   54
     7.07    Compliance with Environmental Laws .........   54
     7.08    ERISA ......................................   55
     7.09    Good Repair ................................   56
     7.10    End of Fiscal Years; Fiscal Quarters .......   56
     7.11    Additional Security; Further Assur-
               ances; Appraisals ........................   56
     7.12    Register ...................................   58

SECTION 8.   Negative Covenants .........................   59
     8.01    Changes in Business ........................   59
     8.02    Consolidation, Merger, Sale or Pur-
               chase of Assets, etc. ....................   59
     8.03    Liens ......................................   62
     8.04    Indebtedness ...............................   65
     8.05    Advances, Investments and Loans ............   66
     8.06    Dividends, etc. ............................   68
     8.07    Transactions with Affiliates ...............   68
     8.08    Working Capital; Minimum Net Worth .........   69
     8.09    Asset Coverage Ratio .......................   69
     8.10    Interest Coverage Ratio ....................   69
     8.11    Leverage Ratio .............................   69
     8.12    Limitation on Voluntary Payments and
               Modifications of Indebtedness; Mod-
               ifications of Certificate of Incor-
               poration, By-Laws and Certain Other
               Agreements; Issuances of Capital
               Stock; etc. ..............................   69
     8.13    Limitation on Certain Restrictions on
               Subsidiaries .............................   70
     8.14    Limitation on the Creation of
               Subsidiaries .............................   70

SECTION 9.   Events of Default ..........................   71
     9.01    Payments ...................................   71
     9.02    Representations, etc. ......................   72
     9.03    Covenants ..................................   72
     9.04    Default Under Other Agreements .............   72
     9.05    Bankruptcy, etc. ...........................   73
     9.06    ERISA ......................................   73
     9.07    Security Documents .........................   74

                                      -iii-
<PAGE>
                                                           Page
                                                           ----
     9.08    Guarantees .................................   74
     9.09    Judgments ..................................   74
     9.10    Ownership ..................................   75

SECTION 10.  Definitions ................................   75

SECTION 11.  The Agent and Co-Agent .....................   98
     11.01   Appointment ................................   98
     11.02   Delegation of Duties .......................   98
     11.03   Exculpatory Provisions .....................   99
     11.04   Reliance by Agent and Co-Agent .............   99
     11.05   Notice of Default ..........................  100
     11.06   Nonreliance on Agent and Co-Agent and
               Other Lenders ............................  100
     11.07   Indemnification ............................  101
     11.08   Agent and Co-Agent in Its Individual
               Capacity .................................  102
     11.09   Holders ....................................  102
     11.10   Resignation of the Agent or Co-Agent;
               Successor Agent or Co-Agent ..............  102

SECTION 12.  Miscellaneous ..............................  103
     12.01   Payment of Expenses, etc. ..................  103
     12.02   Right of Setoff ............................  104
     12.03   Notices ....................................  105
     12.04   Benefit of Agreement .......................  105
     12.05   No Waiver; Remedies Cumulative .............  107
     12.06   Payments Pro Rata ..........................  107
     12.07   Calculations; Computations .................  108
     12.08   Governing Law; Submission to Juris-
               diction; Venue ...........................  109
     12.09   Counterparts ...............................  109
     12.10   Effectiveness ..............................  110
     12.11   Headings Descriptive .......................  110
     12.12   Amendment or Waiver; etc. ..................  110
     12.13   Survival ...................................  112
     12.14   Domicile of Loans ..........................  112
     12.15   Confidentiality ............................  112
     12.16   Waiver of Jury Trial .......................  112

SECTION 13.  Subsidiary Guarantees ......................  113
     13.01   The Subsidiary Guarantees ..................  113
     13.02   Bankruptcy .................................  115
     13.03   Nature of Liability ........................  115
     13.04   Independent Obligation .....................  116
     13.05   Authorization ..............................  117
     13.06   Reliance ...................................  118

                                      -iv-
<PAGE>
                                                           Page
                                                           ----
     13.07   Subordination ..............................  118
     13.08   Waiver .....................................  118

ANNEX I      List of Lenders and Commitments
ANNEX II     Lender Addresses
ANNEX III    Existing Letters of Credit
ANNEX IV     Drilling Rigs
ANNEX V      Existing Investments
ANNEX VI     Subsidiaries
ANNEX VII    Existing Indebtedness
ANNEX VIII   Insurance
ANNEX IX     Existing Liens
ANNEX X      Assets Held For Sale

SCHEDULE 6.04      Litigation
SCHEDULE 6.10      Financial Condition
SCHEDULE 6.18      Environmental Matters

EXHIBIT A-1   --   Form of Notice of Borrowing
EXHIBIT A-2   --   Form of Letter of Credit Request
EXHIBIT B     --   Form of Revolving Note
EXHIBIT C     --   Form of Section 4.04(b)(ii) Certificate
EXHIBIT D-1   --   Form of Opinion of Company's Counsel
EXHIBIT D-2   --   Form of Opinion of Cahill Gordon & Reindel
EXHIBIT E     --   Form of Officers' Certificate
EXHIBIT F     --   Form of Pledge Agreement
EXHIBIT G     --   Form of Security Agreement
EXHIBIT H     --   [intentionally omitted]
EXHIBIT I     --   Form of Solvency Certificate
EXHIBIT K     --   Form of Assignment and Assumption Agreement
EXHIBIT L     --   Form of Compliance Certificate
EXHIBIT M     --   Form of Collateral Report

                                       -v-
<PAGE>
          This SENIOR SECURED REDUCING REVOLVING CREDIT AGREEMENT, dated as of
December 31, 1996 (the "Agreement"), among DI INDUSTRIES, INC., a Texas
corporation (the "Company"), DRILLERS, INC., a Texas corporation ("DI" and, with
the Company, the "Borrowers"), each of the Subsidiary Guarantors party hereto
(the "Subsidiary Guarantors"), the lending institutions from time to time party
hereto (each a "Lender" and, collectively, the "Lenders") and BANKERS TRUST
COMPANY as Agent and Administrative Agent and ING (US) CAPITAL CORPORATION, as
Co-Agent. Unless otherwise defined herein, all capitalized terms used herein and
defined in Section 10 are used herein as so defined.

                              W I T N E S S E T H :

          WHEREAS, DI has entered into an asset purchase agreement, dated as of
November 12, 1996, to acquire (the "Acquisition") substantially all of the
assets of the land drilling division of Diamond Offshore Drilling, Inc. for $26
million in cash;

          WHEREAS, prior to the consummation of the Acquisition, DI will
permanently retire all $9.4 million of outstanding debt under its existing term
loan agreement and will permanently retire such facility; and

          WHEREAS, subject to and upon the terms and conditions herein set
forth, the Lenders are willing to make Revolving Loans to the Borrowers and
issue Letters of Credit for the purposes described herein;

          NOW, THEREFORE, in consideration of the premises and the agreements,
provisions and covenants herein, each of the Borrowers, the Subsidiary
Guarantors, the Lenders, the Agent
and the Co-Agent hereby agrees as follows:

          SECTION 1.  Amount and Terms of Credit.

          1.01 Commitments. Subject to and upon the terms and conditions herein
set forth, each Lender severally agrees, at any time and from time to time on
and after the Initial Borrowing Date and prior to the Final Maturity Date, to
make a revolving loan or loans (each a "Revolving Loan" and, collectively, the
"Revolving Loans") to the Borrowers, which Revolving Loans: (i) shall be
denominated in U.S. Dollars, (ii) except as hereinafter provided, shall, at the
option of the Borrowers, be incurred and maintained as and/or converted

                                       -2-
<PAGE>
into Base Rate Loans or Eurodollar Loans; and further provided that all
Revolving Loans made as part of the same Borrowing shall, unless otherwise
specifically provided herein, consist of Revolving Loans of the same Type, (iii)
may be repaid and reborrowed in accordance with the provisions hereof and (iv)
shall not exceed for any Lender at any time outstanding that aggregate principal
amount which, when combined with Letter of Credit Outstandings (exclusive of
Unpaid Drawings relating to Letters of Credit which are repaid with the proceeds
of, and simultaneously with the incurrence of, the respective incurrence of
Revolving Loans) at such time, equals the Revolving Loan Commitment of such
Lender at such time.

          1.02 Minimum Borrowing Amounts, etc. The aggregate principal amount of
each Borrowing of Loans shall not be less than the Minimum Borrowing Amount
applicable to such Loans. More than one Borrowing may be incurred on any day;
provided that at no time shall there be outstanding more than five Borrowings of
Eurodollar Loans.

          1.03 Notice of Borrowing. (a) Whenever a Borrower desires to incur
Revolving Loans hereunder, it shall give the Agent at the Notice Office, prior
to 10:00 A.M. (New York time), at least three Business Days' prior written
notice (or telephonic notice promptly confirmed in writing) of each Borrowing of
Eurodollar Loans and at least one Business Day's prior written notice (or
telephonic notice promptly confirmed in writing) of each Borrowing of Base Rate
Loans to be made hereunder. Each such notice (each a "Notice of Borrowing")
shall, except as provided in Section 1.10, be irrevocable, and, in the case of
each written notice and each confirmation of telephonic notice, shall be in the
form of Exhibit A-1, appropriately completed to specify (i) the aggregate
principal amount of the Revolving Loans to be made pursuant to such Borrowing,
(ii) the date of such Borrowing (which shall be a Business Day) and (iii)
whether the respective Borrowing shall consist of Base Rate Loans or, to the
extent permitted hereunder, Eurodollar Loans and, if Eurodollar Loans, the
Interest Period to be initially applicable thereto. The Agent shall promptly
give each Lender written notice (or telephonic notice promptly confirmed in
writing) of each proposed Borrowing, of such Lender's proportionate share
thereof and of the other matters covered by the Notice of Borrowing.

          (b) Without in any way limiting the obligation of the Borrowers to
confirm in writing any telephonic notice permitted to be given hereunder, the
Agent or the Letter of Credit

                                       -3-
<PAGE>
Issuer (in the case of the issuance of Letters of Credit), as the case may be,
may prior to receipt of written confirmation act without liability upon the
basis of such telephonic notice, believed by the Agent or the Letter of Credit
Issuer, as the case may be, in good faith to be from an Authorized Officer of a
Borrower. The Agent's or the Letter of Credit Issuer's record of the terms of
such telephonic notice shall be final, conclusive and binding absent manifest
error.

          1.04 Disbursement of Funds. (a) Not later than 1:00 P.M. (New York
time) on the date specified in each Notice of Borrowing, each Lender will make
available its pro rata share, if any, of each Borrowing requested to be made on
such date in the manner provided below. All amounts shall be made available to
the Agent in U.S. Dollars and in immediately available funds at the Payment
Office and the Agent promptly will make available to the applicable Borrower by
depositing to its account at the Payment Office the aggregate of the amounts so
made available in the type of funds received. Unless the Agent shall have been
notified by any Lender prior to the date of Borrowing that such Lender does not
intend to make available to the Agent its portion of the Borrowing or Borrowings
to be made on such date, the Agent may assume that such Lender has made such
amount available to the Agent on such date of Borrowing, and the Agent, in
reliance upon such assumption, may (in its sole discretion and without any
obligation to do so) make available to the applicable Borrower a corresponding
amount. If such corresponding amount is not in fact made available to the Agent
by such Lender and the Agent has made available same to the applicable Borrower,
the Agent shall be entitled to recover such corresponding amount from such
Lender. If such Lender does not pay such corresponding amount forthwith upon the
Agent's demand therefor, the Agent shall promptly notify the Borrowers, and the
Borrowers shall immediately pay such corresponding amount to the Agent, which
payment may be made, subject to the terms and conditions of this Agreement, from
the proceeds of a Loan. The Agent shall also be entitled to recover from the
Lender or the Borrowers, as the case may be, interest on such corresponding
amount in respect of each day from the date such corresponding amount was made
available by the Agent to the Borrowers to the date such corresponding amount is
recovered by the Agent, at a rate per annum equal to (x) if paid by such Lender,
the overnight Federal Funds Rate or (y) if paid by the Borrowers, the then
applicable rate of interest, calculated in accordance with Section 1.08.

                                       -4-
<PAGE>
          (b) Nothing herein shall be deemed to relieve any Lender from its
obligation to fulfill its commitments hereunder or to prejudice any rights which
the Borrowers may have against any Lender as a result of any default by such
Lender hereunder.

          1.05 Notes. (a) The Borrowers' obligation to pay the principal of, and
interest on, all the Loans made to it by each Lender shall be evidenced in the
case of Revolving Loans, by a promissory note substantially in the form of
Exhibit B-1 with blanks appropriately completed in conformity herewith (each a
"Revolving Note" and, collectively, the "Revolving Notes").

          (b) The Revolving Note issued to each Lender shall (i) be executed by
the Borrowers, (ii) be payable to such Lender or its registered assigns and be
dated the Initial Borrowing Date, (iii) be in a stated principal amount equal to
the Revolving Loan Commitment of such Lender and be payable in the principal
amount of the outstanding Revolving Loans evidenced thereby, (iv) mature on the
Final Maturity Date, (v) bear interest as provided in the appropriate clause of
Section 1.08 in respect of the Base Rate Loans and Eurodollar Loans, as the case
may be, evidenced thereby, (vi) be subject to voluntary prepayment as provided
in Section 4.01, and mandatory repayment as provided in Section 4.02, and (vii)
be entitled to the benefits of the Credit Documents.

          (c) Each Lender will note on its internal records the amount of each
Loan made by it and each payment in respect thereof and will prior to any
transfer of any of its Notes endorse on the reverse side thereof the outstanding
principal amount of Loans evidenced thereby. Failure to make any such notation
shall not affect the Borrowers' obligations in respect of such Loans.

          1.06 Conversions. The Borrowers shall have the option to convert on
any Business Day occurring on or after the Initial Borrowing Date, all or a
portion at least equal to the applicable Minimum Borrowing Amount of the
outstanding principal amount of Revolving Loans made pursuant to one or more
Borrowings of one or more Types of Revolving Loans into a Borrowing or
Borrowings of another Type of Revolving Loan; provided that (i) except as
otherwise provided in Section 1.10(b), no partial conversion of a Borrowing of
Eurodollar Loans shall reduce the outstanding principal amount of the Eurodollar
Loans made pursuant to such Borrowing to less than the Minimum Borrowing Amount
applicable thereto, (ii) Base Rate Loans may only

                                       -5-
<PAGE>
be converted into Eurodollar Loans if no payment Default, or Event of Default,
is in existence on the date of the conversion, and (iii) Borrowings of
Eurodollar Loans resulting from this Section 1.06 shall be limited in number as
provided in Section 1.02. Each such conversion shall be effected by the
applicable Borrower by giving the Agent at the Notice Office, prior to 10:00
A.M. (New York time), at least two Business Days' (or one Business Day's in the
case of a conversion into Base Rate Loans) prior written notice (or telephonic
notice promptly confirmed in writing) (each a "Notice of Conversion") specifying
the Revolving Loans to be so converted, the Borrowing(s) pursuant to which the
Revolving Loans were made and, if to be converted into a Borrowing of Eurodollar
Loans, the Interest Period to be initially applicable thereto. The Agent shall
give each Lender prompt notice of any such proposed conversion affecting any of
its Revolving Loans.

          1.07 Pro Rata Borrowings. All Borrowings of Revolving Loans under this
Agreement shall be made by the Lenders pro rata on the basis of their Revolving
Loan Commitments. It is understood that no Lender shall be responsible for any
default by any other Lender of its obligation to make Revolving Loans hereunder
and that each Lender shall be obligated to make the Revolving Loans to be made
by it hereunder, regardless of the failure of any other Lender to fulfill its
commitments hereunder.

          1.08 Interest. (a) The unpaid principal amount of each Base Rate Loan
shall bear interest from the date of the Borrowing thereof until the earlier of
(i) the maturity (whether by acceleration or otherwise) of such Base Rate Loan
and (ii) the conversion of such Base Rate Loan to a Eurodollar Loan pursuant to
Section 1.06, at a rate per annum which shall at all times be the Applicable
Base Rate Margin in excess of the Base Rate in effect from time to time.

          (b) The unpaid principal amount of each Eurodollar Loan shall bear
interest from the date of the Borrowing thereof until the earlier of (i) the
maturity (whether by acceleration or otherwise) of such Eurodollar Loan and (ii)
the conversion of such Eurodollar Loan to a Base Rate Loan pursuant to Section
1.06, 1.09 or 1.10(b), as applicable, at a rate per annum which shall at all
times be the Applicable Eurodollar Margin in excess of the relevant Eurodollar
Rate.

          (c)  Overdue principal and, to the extent permitted
by law, overdue interest in respect of each Loan shall bear

                                       -6-
<PAGE>
interest at a rate per annum equal to the greater of (x) the rate which is 2% in
excess of the rate then borne by such Loans and (y) the rate which is 2% in
excess of the rate otherwise applicable to Base Rate Loans from time to time.
Interest which accrues under this Section 1.08(c) shall be payable on demand.

          (d) Interest shall accrue from and including the date of any Borrowing
to but excluding the date of any repayment thereof (determined in accordance
with Section 4.03) and shall be payable (i) in respect of each Base Rate Loan,
quarterly in arrears on each Quarterly Payment Date, (ii) in respect of each
Eurodollar Loan, on (x) the date of any prepayment or repayment thereof (on the
amount prepaid or repaid), (y) the date of any conversion into a Base Rate Loan
pursuant to Section 1.06, 1.09 or 1.10(b), as applicable (on the amount so
converted) and (z) the last day of each Interest Period applicable thereto and,
in the case of an Interest Period in excess of three months, on each date
occurring at three month intervals after the first day of such Interest Period
and (iii) in respect of each Loan, at maturity (whether by acceleration or
otherwise) and, after such maturity, on demand.

          (e) All computations of interest hereunder shall be made in accordance
with Section 12.07(b).

          (f) The Agent, upon determining the interest rate for any Borrowing of
Eurodollar Loans for any Interest Period, shall promptly notify the Borrowers
and the Lenders thereof.

          1.09 Interest Periods. At the time a Borrower gives a Notice of
Borrowing or Notice of Conversion in respect of the making of, or conversion
into, a Borrowing of Eurodollar Loans (in the case of the initial Interest
Period applicable thereto) or prior to 10:00 A.M. (New York time) on the second
Business Day prior to the expiration of an Interest Period applicable to a
Borrowing of Eurodollar Loans, such Borrower shall have the right to elect by
giving the Agent written notice (or telephonic notice promptly confirmed in
writing) of the Interest Period applicable to such Borrowing, which Interest
Period shall, at the option of such Borrower (but otherwise subject to clause
(y) of the proviso to Section 1.01(a)(ii)), be a one, two, three or six month
period. Notwithstanding anything to the contrary contained above:

          (i)  all Eurodollar Loans comprising a single Bor-
     rowing shall have the same Interest Period;

                                       -7-
<PAGE>
         (ii) the initial Interest Period for any Borrowing of Eurodollar Loans
     shall commence on the date of such Borrowing (including the date of any
     conversion from a Borrowing of Base Rate Loans) and each Interest Period
     occurring thereafter in respect of such Borrowing shall commence on the day
     on which the next preceding Interest Period expires;

        (iii) if any Interest Period begins on a day for which there is no
     numerically corresponding day in the calendar month at the end of such
     Interest Period, such Interest Period shall end on the last Business Day of
     such calendar month;

         (iv) if any Interest Period would otherwise expire on a day which is
     not a Business Day, such Interest Period shall expire on the next
     succeeding Business Day; provided that if any Interest Period would
     otherwise expire on a day which is not a Business Day but is a day of the
     month after which no further Business Day occurs in such month, such
     Interest Period shall expire on the next preceding Business Day;

          (v)  no Interest Period shall be elected which
     extends beyond the Final Maturity Date;

         (vi) no Interest Period may be elected at any time when a payment
     Default or any Event of Default is then in existence; provided, however,
     that at any time when a non-payment Default is in existence, only a
     one-month Interest Period may be elected; and

        (vii) no Interest Period in respect of any Borrowing of Eurodollar Loans
     shall be elected which extends beyond any date upon which a mandatory
     prepayment of Revolving Loans is required to be made under Section 4.02(a),
     as a result of reductions to the Total Revolving Loan Commitment pursuant
     to Section 3.03(b), unless the aggregate principal amount of Revolving
     Loans which are maintained as Base Rate Loans or which have Interest
     Periods which will expire on or before such date will be sufficient to make
     such required payment.

If, upon the expiration of any Interest Period applicable to a Borrowing of
Eurodollar Loans, the Borrowers have failed to elect, or are not permitted to
elect by virtue of the application of clause (vi) above, a new Interest Period
to be

                                       -8-
<PAGE>
applicable to the respective Borrowing of Eurodollar Loans as provided above,
the Borrowers shall be deemed to have elected to convert such Borrowing into a
Borrowing of Base Rate Loans effective as of the expiration date of such current
Interest Period.

          1.10 Increased Costs, Illegality, etc. (a) In the event that (x) in
the case of clause (i) below, the Agent or (y) in the case of clauses (ii) and
(iii) below, any Lender, shall have determined (which determination shall,
absent manifest error, be final and conclusive and binding upon all parties
hereto):

          (i) on any date for determining the Eurodollar Rate for any Interest
     Period, that, by reason of any changes arising after the date of this
     Agreement affecting the interbank Eurodollar market, adequate and fair
     means do not exist for ascertaining the applicable interest rate on the
     basis provided for in the definition of Eurodollar Rate; or

         (ii) at any time, that such Lender shall incur increased costs or
     reductions in the amounts received or receivable hereunder with respect to
     any Eurodollar Loans (other than any increased cost or reduction in the
     amount received or receivable resulting from the imposition of or a change
     in the rate of net income taxes or similar charges) because of (x) any
     change since the date of this Agreement in any applicable law, governmental
     rule, regulation, guideline, order or request (whether or not having the
     force of law), or in the interpretation or administration thereof and
     including the introduction of any new law or governmental rule, regulation,
     guideline, order or request (such as, for example, but not limited to, a
     change in official reserve requirements, but, in all events, excluding
     reserves required under Regulation D to the extent included in the
     computation of the Eurodollar Rate) and/or (y) other circumstances
     affecting such Lender, the interbank Eurodollar market or the position of
     such Lender in such market; or

        (iii) at any time since the date of this Agreement, that the making or
     continuance of any Eurodollar Loan has become unlawful by compliance by
     such Lender in good faith with any law, governmental rule, regulation,
     guideline or order (or would conflict with any such governmental rule,
     regulation, guideline or order not having the force of law

                                       -9-
<PAGE>
     but with which such Lender customarily complies even though the failure to
     comply therewith would not be unlawful), or has become impracticable as a
     result of a contingency occurring after the date of this Agreement which
     materially and adversely affects the interbank Eurodollar market;

then, and in any such event, such Lender (or the Agent in the case of clause (i)
above) shall (x) within five Business Days after any such event and (y) within
five Business Days of the date on which such event no longer exists give notice
(by telephone confirmed in writing) to the Borrowers and (except in the case of
clause (i)) to the Agent of such determination (which notice the Agent shall
promptly transmit to each of the other Lenders). Thereafter, (x) in the case of
clause (i) above, Eurodollar Loans shall no longer be available until such time
as the Agent notifies the Borrowers and the Lenders that the circumstances
giving rise to such notice by the Agent no longer exist (which notice the Agent
shall endeavor to give promptly after any determination thereof by the Agent),
and any Notice of Borrowing or Notice of Conversion given by a Borrower with
respect to Eurodollar Loans which have not yet been incurred shall be deemed
rescinded by the Borrowers, (y) in the case of clause (ii) above, the Borrowers
agree to pay to such Lender, upon written demand therefor (accompanied by the
written notice referred to below), such additional amounts (in the form of an
increased rate of, or a different method of calculating, interest or otherwise
as such Lender in its sole discretion shall determine) as shall be required to
compensate such Lender for such increased costs or reductions in amounts
received or receivable hereunder (a written notice as to the additional amounts
owed to such Lender, showing the basis for the calculation thereof, submitted to
the Borrowers by such Lender shall, absent manifest error, be final and
conclusive and binding upon all parties hereto) and (z) in the case of clause
(iii) above, the Borrowers shall take one of the actions specified in Section
1.10(b) as promptly as possible and, in any event, within the time period
required by law.

          (b) At any time that any Eurodollar Loan is affected by the
circumstances described in Section 1.10(a)(ii) or (iii), the Borrowers may (and
in the case of a Eurodollar Loan affected pursuant to Section 1.10(a)(iii) the
Borrowers shall) either (i) if the affected Eurodollar Loan is then being made
pursuant to a Borrowing, cancel said Borrowing by giving the Agent telephonic
notice (confirmed promptly in writing) thereof on the same date that a Borrower
was notified by a Lender

                                      -10-
<PAGE>
pursuant to Section 1.10(a)(ii) or (iii)), or (ii) if the affected Eurodollar
Loan is then outstanding, upon at least two Business Days' notice to the Agent,
require the affected Lender to convert each such Eurodollar Loan into a Base
Rate Loan (which conversion, in the case of the circumstances described in
Section 1.10(a)(iii), shall occur no later than the last day of the Interest
Period then applicable to such Eurodollar Loan (or such earlier date as shall be
required by applicable law)); provided that if more than one Lender is affected
at any time, then all affected Lenders must be treated the same pursuant to this
Section 1.10(b).

          (c) If any Lender shall have determined that the adoption or
effectiveness of any applicable law, rule or regulation regarding capital
adequacy, or any change therein, or any change in the interpretation or
administration thereof by any governmental authority, central bank or comparable
agency charged with the interpretation or administration thereof, or compliance
by such Lender or any corporation controlling such Lender with any request or
directive regarding capital adequacy (whether or not having the force of law) of
any such authority, central bank or comparable agency, in each case, after the
date of this Agreement, has or would have the effect of reducing the rate of
return on such Lender's or such other corporation's capital or assets as a
consequence of such Lender's Revolving Loan Commitment or obligations hereunder
to a level below that which such Lender or such other corporation could have
achieved but for such adoption, effectiveness, change or compliance (taking into
consideration such Lender's or such other corporation's policies with respect to
capital adequacy), then from time to time, upon written demand by such Lender
(with a copy to the Agent), accompanied by the notice referred to in the last
sentence of this clause (c), the Borrowers shall pay to such Lender such
additional amount or amounts as will compensate such Lender or such other
corporation for such reduction. Each Lender, upon determining in good faith that
any additional amounts will be payable pursuant to this Section 1.10(c), will
give prompt written notice thereof to the Borrowers, which notice shall set
forth the basis of the calculation of such additional amounts, although the
failure to give any such notice shall not release or diminish the Borrowers'
obligations to pay additional amounts pursuant to this Section 1.10(c) upon the
subsequent receipt of such notice.

          1.11  Compensation.  The Borrowers shall compensate
each Lender, promptly upon its written request (which request
shall set forth the basis for requesting such compensation),

                                      -11-
<PAGE>
for all reasonable losses, expenses and liabilities (including, without
limitation, any loss, expense or liability incurred by reason of the liquidation
or reemployment of deposits or other funds required by such Lender to fund its
Eurodollar Loans but excluding loss of anticipated profit with respect to any
Eurodollar Loans) which such Lender may sustain: (i) if for any reason (other
than a default by such Lender or the Agent) a Borrowing of Eurodollar Loans does
not occur on a date specified therefor in a Notice of Borrowing or Notice of
Conversion (whether or not withdrawn by the Borrowers or deemed withdrawn
pursuant to Section 1.10(a) or (b)); (ii) if any repayment (including any
repayment made pursuant to Section 4.01 or 4.02 or as a result of an
acceleration of the Loans pursuant to Section 9) or conversion of any Eurodollar
Loans occurs on a date which is not the last day of an Interest Period
applicable thereto; (iii) if any prepayment of any Eurodollar Loans is not made
on any date specified in a notice of prepayment given by a Borrower; or (iv) as
a consequence of (x) any other default by the Borrowers to repay Eurodollar
Loans when required by the terms of this Agreement or (y) an election made
pursuant to Section 1.10(b). Calculation of all amounts payable to a Lender
under this Section 1.11 shall be made as though that Lender had actually funded
its relevant Eurodollar Loan through the purchase of a Eurodollar deposit
bearing interest at the Eurodollar Rate in an amount equal to the amount of that
Loan, having maturity comparable to the relevant Interest Period and through the
transfer of such Eurodollar deposit from an off-shore office of that Lender to a
domestic office of that Lender in the United States of America; provided,
however, that each Lender may fund each of its Eurodollar Loans in any manner it
sees fit and the foregoing assumption shall be utilized only for the calculation
of amounts payable under this Section 1.11. It is further understood and agreed
that if any repayment of Eurodollar Loans pursuant to Section 4.01 or any
conversion of Eurodollar Loans pursuant to Section 1.06 in either case occurs on
a date which is not the last day of an Interest Period applicable thereto, such
repayment or conversion shall be accompanied by any amounts owing to any Lender
pursuant to this Section 1.11.

          1.12 Change of Lending Office. Each Lender agrees that, upon the
occurrence of any event giving rise to the operation of Section 1.10(a)(ii) or
(iii), 1.10(c), 2.05 or 4.04 with respect to such Lender, it will, if requested
by the Company, use reasonable efforts (subject to overall policy considerations
of such Lender) to designate another lending office for any Loans or Letters of
Credit affected by such event;

                                      -12-
<PAGE>
provided that such designation is made on such terms that, in the sole judgment
of such Lender, such Lender and its lending office suffer no economic, legal or
regulatory disadvantage, with the object of avoiding the consequences of the
event giving rise to the operation of any such Section. Nothing in this Section
1.12 shall affect or postpone any of the obligations of the Borrowers or the
right of any Lender provided in Section 1.10, 2.05 or 4.04.

          1.13 Replacement of Lenders. (x) If any Lender becomes a Defaulting
Lender, (y) upon the occurrence of any event giving rise to the operation of
Section 1.10(a)(ii) or (iii), Section 1.10(c), Section 2.05 or Section 4.04 with
respect to any Lender which results in such Lender charging to the Borrowers
increased costs in excess of those being generally charged by the other Lenders
or (z) in the case of a refusal by a Lender to consent to a proposed change,
waiver, discharge or termination with respect to this Agreement which has been
approved by the Required Lenders as provided in Section 12.12(b) the Borrowers
shall have the right, if no Default or Event of Default then exists or, in the
case of clause (z) above, would exist after giving effect to such replacement,
to replace such Lender (the "Replaced Lender") with one or more other Eligible
Transferee or Transferees, none of whom shall constitute a Defaulting Lender at
the time of such replacement (collectively, the "Replacement Lender") and each
of whom shall be acceptable to the Agent; provided that (i) at the time of any
replacement pursuant to this Section 1.13, the Replacement Lender shall enter
into one or more Assignment and Assumption Agreements pursuant to Section
12.04(b) (and with all fees payable pursuant to said Section 12.04(b) to be paid
by the Replacement Lender) pursuant to which the Replacement Lender shall
acquire the Revolving Loan Commitment and outstanding Revolving Loans of, and in
each case participations in Letters of Credit by, the Replaced Lender and, in
connection therewith, shall pay to (x) the Replaced Lender in respect thereof an
amount equal to the sum of (A) an amount equal to the principal of, and all
accrued interest on, all outstanding Revolving Loans of the Replaced Lender, (B)
an amount equal to all Unpaid Drawings that have been funded by (and not
reimbursed to) such Replaced Lender, together with all then unpaid interest with
respect thereto at such time and (C) an amount equal to all accrued, but
theretofore unpaid, Fees owing to the Replaced Lender pursuant to Section 3.01,
(y) each Letter of Credit Issuer an amount equal to such Replaced Lender's
Percentage of any Unpaid Drawing relating to Letters of Credit issued by such
Letter of Credit Issuer (which at such time remains an Unpaid

                                      -13-
<PAGE>
Drawing) to the extent such amount was not theretofore funded by such Replaced
Lender and (ii) all obligations of the Borrowers then owing to the Replaced
Lender (other than those specifically described in clause (i) above in respect
of which the assignment purchase price has been, or is concurrently being, paid,
but including all amounts, if any, owing under Section 1.11) shall be paid in
full to such Replaced Lender concurrently with such replacement. Upon the
execution of the respective Assignment and Assumption Agreements, the payment of
amounts referred to in clauses (i) and (ii) above, recordation of the assignment
on the Register by the Agent pursuant to Section 7.12 and, if so requested by
the Replacement Lender of the appropriate Revolving Note or Revolving Notes
executed by the Borrowers, the Replacement Lender shall become a Lender
hereunder and the Replaced Lender shall cease to constitute a Lender hereunder,
except with respect to indemnification provisions under this Agreement
(including, without limitation, Sections 1.10, 1.11, 2.05, 4.04, 12.01 and
12.06), which shall survive as to such Replaced Lender.

          1.14 Joint and Several Liability. (a) The Borrowers shall have joint
and several liability in respect of all Obligations hereunder and under any
other Credit Document to which any Borrower is a party, without regard to any
defense (other than the defense that payment in full has been made), set-off or
counterclaim which may at any time be available to or be asserted by any other
Credit Party against the Lenders, or by any other circumstance whatsoever (with
or without notice to or knowledge of the Borrowers) which constitutes, or might
be construed to constitute, an equitable or legal discharge of the Borrowers'
liability hereunder, in bankruptcy or in any other instance, and the Obligations
of the Borrowers hereunder shall not be conditioned or contingent upon the
pursuit by the Lenders or any other Person at any time of any right or remedy
against the Borrowers or against any other Person which may be or become liable
in respect of all or any part of the Obligations or against any Collateral or
guarantee therefor or right of offset with respect thereto. The Borrowers hereby
acknowledge that this Agreement is the independent and several obligation of
each Borrower (regardless of which Borrower shall have delivered a Notice of
Borrowing) and may be enforced against each Borrower separately, whether or not
enforcement of any right or remedy hereunder has been sought against the other
Borrower. Each Borrower hereby expressly waives, with respect to any of the
Loans made to the other Borrower hereunder and any of the amounts owing
hereunder by such other Credit Parties in respect of such Loans, diligence,
presentment, demand of

                                      -14-
<PAGE>
payment, protest and all notices whatsoever, and any requirement that the Agent
or any Lender exhaust any right, power or remedy or proceeds against such other
Credit Parties under this Agreement or the Notes or any other agreement or
instrument referred to herein or therein, or against any other Person under any
other guarantee of, or security for, any of such amounts owing hereunder.

          (b) Notwithstanding any other provisions of this Agreement or the
other Credit Documents, the maximum aggregate amount for which a Borrower shall
be liable hereunder with respect to Loans to the other Borrower and other
Obligations of the other Borrower shall not exceed the maximum aggregate amount
of Obligations which does not render this Section 1.14, as it relates to such
Borrower, void or voidable under applicable laws relating to fraudulent
conveyance or fraudulent transfer. Subject to the preceding sentence, each
Borrower shall be liable for payment of Obligations when due and not for
collection thereof and each Lender may, from time to time, enforce this
provision against any Borrower up to the full amount of the Obligations owed to
such Lender without proceeding against the other Borrower, against any security
for the Obligations, against any Subsidiary Guarantor or under any Subsidiary
Guarantee covering the Obligations.

          (c) The Borrowers hereby agree, as between themselves, that if any
Borrower (an "Excess Funding Borrower") shall pay amounts in excess of the
portion of the then outstanding Obligations which have arisen in respect of
extensions of credit to or for the benefit of the Excess Funding Borrower the
other Borrower shall, on demand (but subject to the next sentence hereof), pay
to the Excess Funding Borrower an amount equal to such excess. The payment
obligation of any Borrower to any Excess Funding Borrower under this Section
1.14(c) shall be subordinate in right of payment to, and subject to, the prior
payment and satisfaction in full of the Obligations of such Borrower under the
other provisions of this Agreement and the other Credit Documents and such
Excess Funding Borrower shall not exercise any right or remedy with respect to
such excess until payment and satisfaction in full of all of the Obligations; in
addition, no Borrower shall be obligated to pay to the Excess Funding Borrower
an amount under this Section 1.14(c) greater than the amount which, when taken
together with the aggregate of the amounts paid by it under this Credit
Agreement and all other payments under this Section 1.14, would exceed the
portion of the then outstanding

                                      -15-
<PAGE>
Obligations which have arisen in respect of extensions of credit to or for the
benefit of such Borrower.

          SECTION 2.  Letters of Credit.

          2.01 Letters of Credit. (a) Subject to and upon the terms and
conditions herein set forth, the Borrowers may request the Letter of Credit
Issuer at any time and from time to time on or after the Initial Borrowing Date
and prior to the Business Day preceding the Final Maturity Date to issue, for
the account of the Borrowers and in support of, on a standby basis, L/C
Supportable Indebtedness of the Borrowers or any Subsidiary of either Borrower
to any other Person, irrevocable letters of credit in such form as may be
approved by such Letter of Credit Issuer (each such letter of credit, a "Letter
of Credit" and, collectively, the "Letters of Credit"). Notwithstanding the
foregoing, no Letter of Credit Issuer shall be under any obligation to issue any
Letter of Credit if at the time of such issuance:

          (i) any order, judgment or decree of any governmental authority or
     arbitrator shall purport by its terms to enjoin or restrain such Letter of
     Credit Issuer from issuing such Letter of Credit or any requirement of law
     applicable to such Letter of Credit Issuer or any request or directive
     (whether or not having the force of law) from any governmental authority
     with jurisdiction over such Letter of Credit Issuer shall prohibit, or
     request that such Letter of Credit Issuer refrain from, the issuance of
     letters of credit generally or such Letter of Credit in particular or shall
     impose upon such Letter of Credit Issuer with respect to such Letter of
     Credit any restriction or reserve or capital requirement (for which such
     Letter of Credit Issuer is not otherwise compensated pursuant to the terms
     hereof) not in effect on the date hereof, or any unreimbursed loss, cost or
     expense which was not applicable, in effect or known to such Letter of
     Credit Issuer as of the date hereof and which such Letter of Credit Issuer
     in good faith deems material to it; or

         (ii) such Letter of Credit Issuer shall have received notice from the
     Borrowers or the Required Lenders prior to the issuance of such Letter of
     Credit of the type described in clause (vi) of Section 2.01(b).

                                      -16-
<PAGE>
          (b) Notwithstanding the foregoing, (i) no Letter of Credit shall be
issued the Stated Amount of which, when added to the Letter of Credit
Outstandings (exclusive of Unpaid Drawings which are repaid on the date of, and
prior to the issuance of, the respective Letter of Credit) at such time, would
exceed either (x) the Letter of Credit Sublimit or (y) when added to the
aggregate principal amount of all Revolving Loans then outstanding, the Total
Revolving Loan Commitment at such time; (ii) each Letter of Credit shall have an
expiry date occurring not later than one year after such Letter of Credit's date
of issuance; provided that any such Letter of Credit may be automatically
extendable for periods of up to one year so long as such Letter of Credit
provides that the respective Letter of Credit Issuer retains an option,
satisfactory to such Letter of Credit Issuer, to terminate such Letter of Credit
within a specified period of time prior (but not less than 30 days) to each
scheduled extension date; provided, further, that each Letter of Credit shall
state and shall provide that it shall, in no event, expire no later than five
Business Days prior to the Final Maturity Date; (iii) each Letter of Credit
shall be denominated in U.S. Dollars; (iv) each Letter of Credit shall provide
that the Stated Amount of each Letter of Credit shall not be less than $100,000
or such lesser amount as is acceptable to the respective Letter of Credit
Issuer; (v) no Letter of Credit Issuer will issue any Letter of Credit after it
has received written notice from a Borrower or the Required Lenders stating that
a Default or an Event of Default exists until such time as such Letter of Credit
Issuer shall have received a written notice of (x) rescission of such notice
from the party or parties originally delivering the same or (y) a waiver of such
Default or Event of Default by the Required Lenders and (vi) no Letter of Credit
in support of L/C Supportable Indebtedness of a Foreign Subsidiary shall be
issued the Stated Amount of which, when added to the Letter of Credit
Outstandings (exclusive of Unpaid Drawings which are repaid on the date of, and
prior to the issuance of, the respective Letter of Credit) in support of L/C
Supportable Indebtedness of Foreign Subsidiaries at such time, would exceed $1
million.

          (c) Notwithstanding the foregoing, in the event a Lender Default
exists, no Letter of Credit Issuer shall be required to issue any Letter of
Credit unless the respective Letter of Credit Issuer has entered into
arrangements satisfactory to it and the Borrowers to eliminate such Letter of
Credit Issuer's risk with respect to the participation in Letters of Credit of
the Defaulting Lender or Lenders, including by cash collateralizing such
Defaulting Lender's or Lenders' Percentage

                                      -17-
<PAGE>
of the Letter of Credit Outstandings, as the case may be. No such arrangement
shall prejudice the right of the Borrowers or the Letter of Credit Issuer to
pursue any available remedies it may have against any Defaulting Lender.

          2.02 Letter of Credit Requests; Notices of Issuance. (a) Whenever the
Borrowers desires that a Letter of Credit be issued, a Borrower shall give the
Agent and the respective Letter of Credit Issuer written notice (or notice by
facsimile) thereof prior to 12:00 Noon (New York time) at least two Business
Days (or such shorter period as may be acceptable to the respective Letter of
Credit Issuer) prior to the proposed date of issuance (which shall be a Business
Day) which written notice shall be in the form of Exhibit A-2 (each, a "Letter
of Credit Request"). Each Letter of Credit Request shall include any other
documents as such Letter of Credit Issuer customarily requires in connection
therewith.

          (b) Each Letter of Credit Issuer shall, promptly after each issuance
of, or amendment or modification to, a Letter of Credit issued by it, give the
Agent, each Lender and the Borrowers written notice of the issuance of, or
amendment or modification to, such Letter of Credit, accompanied by a copy of
the Letter of Credit or Letters of Credit issued by it and each such amendment
or modification thereto.

          2.03 Agreement to Repay Letter of Credit Drawings. (a) The Borrowers
hereby agree to reimburse each Letter of Credit Issuer, by making payment to the
Agent in immediately available funds at the Payment Office, for any payment or
disbursement made by such Letter of Credit Issuer under any Letter of Credit
issued by it (each such amount so paid or disbursed until reimbursed, an "Unpaid
Drawing") no later than one Business Day following the date of such payment or
disbursement, with interest on the amount so paid or disbursed by such Letter of
Credit Issuer, to the extent not reimbursed prior to 1:00 P.M. (New York time)
on the date of such payment or disbursement, from and including the date paid or
disbursed to but not including the date such Letter of Credit Issuer is
reimbursed therefor at a rate per annum which shall be the Applicable Base Rate
Margin in excess of the Base Rate as in effect from time to time (plus an
additional 2% per annum if not reimbursed by the third Business Day after the
date of such payment or disbursement), such interest also to be payable on
demand. Each Letter of Credit Issuer shall provide the Borrowers prompt notice
of any payment or disbursement made by it under any Letter of Credit issued by
it, although the failure of, or delay

                                      -18-
<PAGE>
in, giving any such notice shall not release or diminish the obligations of the
Borrowers under this Section 2.03(a) or under any other Section of this
Agreement.

          (b) The Borrowers' obligation under this Section 2.03 to reimburse the
respective Letter of Credit Issuer with respect to Unpaid Drawings (including,
in each case, interest thereon) shall be absolute and unconditional under any
and all circumstances and irrespective of any setoff, counterclaim or defense to
payment which the Borrowers or any of its Subsidiaries may have or have had
against such Letter of Credit Issuer, the Agent or any Lender, including,
without limitation, any defense based upon the failure of any drawing under a
Letter of Credit issued by it to conform to the terms of the Letter of Credit or
any nonapplication or misapplication by the beneficiary of the proceeds of such
drawing; provided, however, that the Borrowers shall not be obligated to
reimburse such Letter of Credit Issuer for any wrongful payment made by such
Letter of Credit Issuer under a Letter of Credit issued by it as a result of
acts or omissions that have been found to constitute willful misconduct or gross
negligence on the part of such Letter of Credit Issuer.

          2.04 Letter of Credit Participations. (a) Immediately upon the
issuance by a Letter of Credit Issuer of any Letter of Credit, such Letter of
Credit Issuer shall be deemed to have sold and transferred to each other Lender,
and each such Lender (each a "Participant") shall be deemed irrevocably and
unconditionally to have purchased and received from such Letter of Credit
Issuer, without recourse or warranty, an undivided interest and participation,
to the extent of such Participant's Percentage, in such Letter of Credit, each
substitute Letter of Credit, each drawing made thereunder and the obligations of
the Borrowers under this Agreement with respect thereto (although Letter of
Credit Fees shall be payable directly to the Agent for the account of the
Lenders as provided in Section 3.01(b) and the Participants shall have no right
to receive any portion of any Facing Fees with respect to such Letters of
Credit) and any security therefor or guaranty pertaining thereto. Upon any
change in the Revolving Loan Commitments of the Lenders pursuant to Section 1.13
or 12.04(b), it is hereby agreed that, with respect to all outstanding Letters
of Credit and Unpaid Drawings with respect thereto, there shall be an automatic
adjustment to the participations pursuant to this Section 2.04 to reflect the
new Percentages of the assigning and assignee Lender.

                                      -19-
<PAGE>
          (b) In determining whether to pay under any Letter of Credit, no
Letter of Credit Issuer shall have any obligation relative to the Participants
other than to determine that any documents required to be delivered under such
Letter of Credit have been delivered and that they appear to substantially
comply on their face with the requirements of such Letter of Credit. Any action
taken or omitted to be taken by any Letter of Credit Issuer under or in
connection with any Letter of Credit issued by it if taken or omitted in the
absence of such a finding of gross negligence or willful misconduct, shall not
create for such Letter of Credit Issuer any resulting liability.

          (c) In the event that any Letter of Credit Issuer makes any payment
under any Letter of Credit issued by it and the Borrowers shall not have
reimbursed such amount in full to the Letter of Credit Issuer pursuant to
Section 2.03(a), such Letter of Credit Issuer shall promptly notify the Agent,
and the Agent shall promptly notify each Participant of such failure, and each
such Participant shall promptly and unconditionally pay to the Agent for the
account of such Letter of Credit Issuer, the amount of such Participant's
Percentage of such payment in U.S. Dollars and in same day funds; provided,
however, that no Participant shall be obligated to pay to the Agent its
Percentage of such unreimbursed amount for any wrongful payment made by such
Letter of Credit Issuer under a Letter of Credit issued by it as a result of
acts or omissions that have been found to constitute willful misconduct or gross
negligence on the part of such Letter of Credit Issuer. If the Agent so notifies
any Participant required to fund a payment under a Letter of Credit prior to
11:00 A.M. (New York time) on any Business Day, such Participant shall make
available to the Agent for the account of the respective Letter of Credit Issuer
such Participant's Percentage of the amount of such payment on such Business Day
in same day funds (and, to the extent such notice is given after 11:00 A.M. (New
York time) on any Business Day, such Participant shall make such payment on the
immediately following Business Day). If and to the extent such Participant shall
not have so made its Percentage of the amount of such payment available to the
Agent for the account of the respective Letter of Credit Issuer, such
Participant agrees to pay to the Agent for the account of such Letter of Credit
Issuer, forthwith on demand such amount, together with interest thereon, for
each day from such date until the date such amount is paid to the Agent for the
account of the Letter of Credit Issuer at the overnight Federal Funds Rate. The
failure of any Participant to make available to the Agent for the account of

                                      -20-
<PAGE>
the respective Letter of Credit Issuer its Percentage of any payment under any
Letter of Credit issued by it shall not relieve any other Participant of its
obligation hereunder to make available to the Agent for the account of such
Letter of Credit Issuer its applicable Percentage of any payment under any such
Letter of Credit on the date required, as specified above, but no Participant
shall be responsible for the failure of any other Participant to make available
to the Agent for the account of such Letter of Credit Issuer such other
Participant's Percentage of any such payment.

          (d) Whenever any Letter of Credit Issuer receives a payment of a
reimbursement obligation as to which the Agent have received for the account of
such Letter of Credit Issuer any payments from the Participants pursuant to
clause (c) above, such Letter of Credit Issuer shall pay to the Agent and the
Agent shall promptly pay to each Participant which has paid its Percentage
thereof, in U.S. Dollars and in same day funds, an amount equal to such
Participant's Percentage of the principal amount thereof and interest thereon
accruing after the purchase of the respective participations.

          (e) The obligations of the Participants to make payments to the Agent
for the account of the respective Letter of Credit Issuer with respect to each
Letter of Credit issued by it shall be irrevocable and not subject to
counterclaim, set-off or other defense or any other qualification or exception
whatsoever and shall be made in accordance with the terms and conditions of this
Agreement under all circumstances, including, without limitation, any of the
following circumstances:

          (i)  any lack of validity or enforceability of this
     Agreement or any of the other Credit Documents;

         (ii) the existence of any claim, set-off, defense or other right which
     the Borrowers or any of their Subsidiaries may have at any time against a
     beneficiary named in a Letter of Credit, any transferee of any Letter of
     Credit (or any Person for whom any such transferee may be acting), the
     Agents, any Letter of Credit Issuer, any Lender, or other Person, whether
     in connection with this Agreement, any Letter of Credit, the transactions
     contemplated herein or any unrelated transactions (including any underlying
     transaction between the Borrowers, or any of their Subsidiaries and the
     beneficiary named in any such Letter of Credit);

                                      -21-
<PAGE>
          (iii) any draft, certificate or other document presented under the
     Letter of Credit proving to be forged, fraudulent, invalid or insufficient
     in any respect or any statement therein being untrue or inaccurate in any
     respect;

          (iv) the surrender or impairment of any security for the performance
     or observance of any of the terms of any of the Credit Documents; or

          (v) the occurrence of any Default or Event of Default.

          2.05 Increased Costs. If the adoption or effectiveness of any
applicable law, rule or regulation, or any change therein, or any change in the
interpretation or administration thereof by any governmental authority, central
bank or comparable agency charged with the interpretation or administration
thereof, or compliance by any Letter of Credit Issuer or any Participant with
any request or directive (whether or not having the force of law) by any such
authority, central bank or comparable agency, in each case, after the date
hereof, shall either (i) impose, modify or make applicable any reserve, deposit,
capital adequacy or similar requirement against Letters of Credit issued by such
Letter of Credit Issuer or such Participant's participation therein, or (ii)
impose on any Letter of Credit Issuer or any Participant any other conditions
affecting this Agreement, any Letter of Credit or such Participant's
participation therein; and the result of any of the foregoing is to increase the
cost to such Letter of Credit Issuer or such Participant of issuing, maintaining
or participating in any Letter of Credit, or to reduce the amount of any sum
received or receivable by such Letter of Credit Issuer or such Participant
hereunder, then, upon written demand to the Borrowers by such Letter of Credit
Issuer or such Participant (a copy of which notice shall be sent by such Letter
of Credit Issuer or such Participant to the Agent), accompanied by the
certificate described in the last sentence of this Section 2.05, the Borrowers
shall pay to such Letter of Credit Issuer or such Participant such additional
amount or amounts as will compensate such Letter of Credit Issuer or such
Participant for such increased cost or reduction. A certificate submitted to the
Borrowers by such Letter of Credit Issuer or such Participant, as the case may
be (a copy of which certificate shall be sent by such Letter of Credit Issuer or
such Participant to the Agent), setting forth the basis for the determination of
such additional amount or amounts necessary to compensate such

                                      -22-
<PAGE>
Letter of Credit Issuer or such Participant as aforesaid shall be final and
conclusive and binding on the Borrowers absent manifest error, although the
failure to deliver any such certificate shall not release or diminish the
Borrowers' obligations to pay additional amounts pursuant to this Section 2.05
upon subsequent receipt of such certificate.

          SECTION 3.  Fees; Commitments.

          3.01 Fees. (a) The Borrowers shall pay to the Agent for distribution
to each Non-Defaulting Lender a commitment fee (the "Commitment Fee") for the
period from and including the Effective Date to but not including the Final
Maturity Date (or such earlier date as the Total Revolving Loan Commitment shall
have been terminated), computed at a rate for each day equal to .50% per annum
on the daily average Unutilized Revolving Loan Commitment of such Lender.
Accrued Commitment Fees shall be due and payable on a pro rata basis quarterly
in arrears on each Quarterly Payment Date and the date upon which the Total
Revolving Loan Commitment is terminated.

          (b) The Borrowers shall pay to the Agent for the account of the
Lenders pro rata on the basis of their Percentages, a fee in respect of each
Letter of Credit (the "Letter of Credit Fee") computed at a rate per annum equal
to the Applicable Eurodollar Margin then in effect on the daily Stated Amount of
such Letter of Credit. Accrued Letter of Credit Fees shall be due and payable
quarterly in arrears on each Quarterly Payment Date and upon and until the first
day on or after the termination of the Total Revolving Loan Commitment upon
which no Letters of Credit remain outstanding.

          (c) The Borrowers shall pay to the Agent for the account of each
Letter of Credit Issuer a fee in respect of each Letter of Credit issued by such
Letter of Credit Issuer (the "Facing Fee") computed at the rate of 1/4 of 1% per
annum on the daily Stated Amount of such Letter of Credit; provided that in no
event shall the annual Facing Fee with respect to each Letter of Credit be less
than $500; it being agreed that, on the date of issuance of any Letter of Credit
and on each anniversary thereof prior to the termination of such Letter of
Credit, if $500 will exceed the amount of Facing Fees that will accrue with
respect to such Letter of Credit for the immediately succeeding 12-month period,
the full $500 shall be payable on the date of issuance of such Letter of Credit
and on each such anniversary thereof prior to the termination of such Letter of
Credit. Except as provided in the immediately

                                      -23-
<PAGE>
preceding sentence, accrued Facing Fees shall be due and payable quarterly in
arrears on each Quarterly Payment Date and upon the first day on or after the
termination of the Total Revolving Loan Commitment upon which no Letters of
Credit remain outstanding.

          (d) The Borrowers shall pay directly to the Letter of Credit Issuer
upon each payment under, and/or amendment of, a Letter of Credit issued by the
Letter of Credit Issuer such amount as shall at the time of such payment or
amendment be the administrative charge which the Letter of Credit Issuer is
customarily charging for payments under, or amendments of, letters of credit
issued by it.

          (e) The Borrowers shall pay to the Agent and Co-Agent such fees as may
be agreed to from time to time between the Borrowers and the Agent and Co-Agent
when and as due.

          (f) All computations of Fees shall be made in accordance with Section
12.07(b).

          3.02 Voluntary Termination or Reduction of Total Unutilized Revolving
Loan Commitment. (a) Upon at least two Business Days' prior written notice (or
telephonic notice promptly confirmed in writing) to the Agent at the Notice
Office (which notice the Agent shall promptly transmit to each of the Lenders),
the Borrowers shall have the right, without premium or penalty, to terminate or
partially reduce the Total Unutilized Revolving Loan Commitment; provided that
(x) any such termination or partial reduction shall apply to proportionately and
permanently reduce the Revolving Loan Commitment of each of the Lenders and (y)
any partial reduction pursuant to this Section 3.02(a) shall be in the amount of
at least $1,000,000.

          3.03 Mandatory Reduction of Revolving Loan Commitments. (a) The Total
Revolving Loan Commitment (and the Revolving Loan Commitment of each Lender)
shall terminate in its entirety on December 31, 1996 unless the Initial
Borrowing Date has occurred on or before such date.

          (b) In addition to any other mandatory commitment reductions pursuant
to this Section 3.03, the Total Revolving Loan Commitment shall be permanently
reduced on the dates set forth below and by the amounts set forth opposite such
dates below:

                                      -24-
<PAGE>
             Date               Amount of Reduction
             ----               -------------------

            January 2, 1998         $ 5,000,000

            January 2, 1999         $ 5,000,000

          (c) In addition to any other mandatory commitment reductions pursuant
to this Section 3.03, the Total Revolving Loan Commitment shall be permanently
reduced on each date on which the Company or any of its Subsidiaries receives
Net Cash Proceeds from Asset Sales in excess of $500,000 individually or
$1,000,000 in the aggregate in any consecutive twelve month period to the extent
of the excess Net Cash Proceeds so received.

          (d)  The Total Revolving Loan Commitment (and the
Revolving Loan Commitment of each Lender) shall terminate in
its entirety on the Final Maturity Date.

          (e) Each reduction to the Total Revolving Loan Commitment pursuant to
this Section 3.03 shall apply proportionately to reduce the Revolving Loan
Commitment of each Lender.

          SECTION 4.  Payments.

          4.01 Voluntary Prepayments. (a) The Borrowers shall have the right to
prepay the Loans, in whole or in part, without premium or penalty except as
otherwise provided in this Agreement, from time to time on the following terms
and conditions: (i) a Borrower shall give the Agent at the Notice Office written
notice (or telephonic notice promptly confirmed in writing) of its intent to
prepay the Loans, the amount of such prepayment and (in the case of Eurodollar
Loans) the specific Borrowing(s) pursuant to which such Loans were made, which
notice shall be given by a Borrower prior to 11:00 A.M. (New York time) (x) at
least one Business Day prior to the date of such prepayment in the case of
Revolving Loans maintained as Base Rate Loans and (y) at least three Business
Days prior to the date of such prepayment in the case of Eurodollar Loans, which
notice shall promptly be transmitted by the Agent to each of the Lenders; (ii)
each prepayment shall be in an aggregate principal amount of at least
$1,000,000; provided that no partial payment of Eurodollar Loans made pursuant
to a Borrowing shall reduce the aggregate principal amount of the Eurodollar

                                      -25-
<PAGE>
Loans outstanding pursuant to such Borrowing to an amount less than the Minimum
Borrowing Amount applicable thereto; and (iii) each prepayment in respect of any
Revolving Loans made pursuant to a Borrowing shall be applied pro rata among
such Revolving Loans; provided that such prepayment shall not be applied to any
Revolving Loans of a Defaulting Lender.

          4.02 Mandatory Prepayments. (a) If on any date the sum of (i) the
aggregate outstanding principal amount of Revolving Loans (after giving effect
to all other repayments thereof on such date) plus (ii) the Letter of Credit
Outstandings on such date exceeds the Total Revolving Loan Commitment as then in
effect, the Borrowers shall repay on such date the principal of Revolving Loans
in an aggregate amount equal to such excess. If, after giving effect to the
prepayment of all outstanding Revolving Loans, the aggregate amount of Letter of
Credit Outstandings exceeds the Total Revolving Loan Commitment as then in
effect, the Company shall pay to the Agent on such date an amount in cash and/or
Cash Equivalents equal to such excess (up to the aggregate amount of Letter of
Credit Outstandings at such time) and the Agent shall hold such payment as
security for the obligations of the Borrowers hereunder pursuant to a cash
collateral agreement to be entered into in form and substance reasonably
satisfactory to the Agent (which shall permit certain investments in Cash
Equivalents reasonably satisfactory to the Agent until the proceeds are applied
to the secured obligations); provided that any such Cash collateral shall be
released to the Borrowers at any time at which such excess shall no longer
exist.

          (b) In addition to any other mandatory prepayments pursuant to this
Section 4.02, on each date on or after the Initial Borrowing Date on which the
Company or any of its Subsidiaries receives Net Cash Proceeds from an Asset Sale
or Sales, disregarding for purposes of this Section 4.02(b) clause (iii) of the
definition of "Asset Sale", in excess of $500,000 individually or $1,000,000 in
the aggregate in any consecutive twelve month period, any Borrowings and Letter
of Credit Outstandings shall be reduced by an amount equal to 100% of such
excess Net Cash Proceeds so received.

          (c) In addition to any other mandatory prepayments pursuant to this
Section 4.02, on each date on or after the Initial Borrowing Date on which the
Company or any of its Subsidiaries receives any cash proceeds from any
incurrence of Indebtedness (other than Indebtedness permitted to be incurred
pursuant to Section 8.04) by the Company or any of its

                                      -26-
<PAGE>
Subsidiaries, any Borrowings and Letter of Credit Outstandings shall be reduced
by an amount equal to 100% of the cash proceeds (net of all underwriting
discounts, fees and commissions and other costs and expenses associated
therewith) of the respective incurrence of Indebtedness.

          (d) In addition to any other mandatory prepayments pursuant to this
Section 4.02, on each date on or after the Initial Borrowing Date on which the
Company or any of its Subsidiaries receives any cash proceeds, from any sale or
issuance of preferred or common equity of (or cash capital contributions to) the
Company or any of its Subsidiaries (other than proceeds received from (x)
issuances of options to purchase the Company Common Stock to management,
directors, non-employee consultants, and employees of the Company and its
Subsidiaries, (y) issuances of the Company Common Stock (including as a result
of the exercise of any options with regard thereto) to management, directors,
non-employee consultants, and employees of the Company and its Subsidiaries and
(z) equity contributions to any Subsidiary of the Company made by the Company or
any other Subsidiary of the Company), any Borrowings and Letter of Credit
Outstandings shall be reduced by an amount equal to 100% of such cash proceeds
(net of all underwriting discounts, fees and commissions and other costs and
expenses associated therewith) of the respective equity issuance or capital
contribution.

          (e) In addition to any other mandatory prepayments pursuant to this
Section 4.02, within 10 days following each date on or after the Initial
Borrowing Date on which the Company or any of its Subsidiaries receives proceeds
from any insurance on any assets owned by the Company or its Subsidiaries and
such proceeds are in excess of $500,000 individually or $1,000,000 in the
aggregate in any consecutive twelve month period, and such proceeds are not
otherwise reinvested (or contractually committed to be reinvested) in like
assets within 90 days of receipt, any Borrowings and Letter of Credit
Outstandings shall be reduced by an amount equal to 100% of such excess
insurance proceeds; provided, however, that any proceeds in excess of $2 million
shall be deposited in a cash collateral account, pursuant to documentation
acceptable to the Agent, pending application of such proceeds in accordance
herewith.

          (f) With respect to each repayment of Revolving Loans required by this
Section 4.02, the Borrowers may designate the Types of Revolving Loans which are
to be repaid and,

                                      -27-
<PAGE>
in the case of Eurodollar Loans, the specific Borrowing(s) pursuant to which
such Loans were made; provided that (i) Eurodollar Loans may be designated for
repayment pursuant to this Section 4.02 only on the last day of an Interest
Period applicable thereto unless all Eurodollar Loans with Interest Periods
ending on such date of required prepayment and all Base Rate Loans have been
paid in full; (ii) if any repayment of Eurodollar Loans made pursuant to a
single Borrowing shall reduce the outstanding Eurodollar Loans to an amount less
than the Minimum Borrowing Amount, such Borrowing shall be immediately converted
into Base Rate Loans; and (iii) each repayment of any Revolving Loans made
pursuant to a Borrowing shall be applied pro rata among such Revolving Loans. In
the absence of a designation by the Borrowers as described in the preceding
sentence, the Agent shall, subject to the above, make such designation in its
sole discretion with a view, but no obligation, to minimize breakage costs owing
under Section 1.11.

          (g) Notwithstanding anything to the contrary contained elsewhere in
this Agreement, all then outstanding Revolving Loans and Letter of Credit
Outstandings shall be repaid in full on the Final Maturity Date.

          4.03 Method and Place of Payment. Except as otherwise specifically
provided herein, all payments under this Agreement or under any Note shall be
made to the Agent for the ratable account of the Lenders entitled thereto, not
later than 2:00 P.M. (New York time) on the date when due and shall be made in
immediately available funds and in U.S. Dollars at the Payment Office, it being
understood that written, telex or facsimile transmission notice by a Borrower to
the Agent to make a payment from the funds in such Borrower's account at the
Payment Office shall constitute the making of such payment to the extent of such
funds held in such account. Any payments under this Agreement or under any Note
which are made later than 2:00 P.M. (New York time) shall be deemed to have been
made on the next succeeding Business Day. Whenever any payment to be made
hereunder or under any Note shall be stated to be due on a day which is not a
Business Day (unless otherwise provided herein), the due date thereof shall be
extended to the next succeeding Business Day and, with respect to payments of
principal, interest shall be payable during such extension at the applicable
rate in effect immediately prior to such extension.

          4.04 Net Payments. (a) All payments made by the Borrowers hereunder or
under any Note will be made without set- off, counterclaim or other defense
(which payment shall not be

                                      -28-
<PAGE>
deemed a waiver by the Borrowers of any claims arising under this Agreement).
Except as provided in Section 4.04(b), all such payments will be made free and
clear of, and without deduction or withholding for, any present or future taxes,
levies, imposts, duties, fees, assessments or other charges of whatever nature
now or hereafter imposed by any jurisdiction or by any political subdivision or
taxing authority thereof or therein with respect to such payment (but excluding,
except as provided in the second succeeding sentence, any tax (including any
franchise tax) imposed on or measured by the net income or net profits of a
Lender pursuant to the laws of the jurisdiction in which it is organized or the
jurisdiction in which the principal office or applicable lending office of such
Lender is located or any subdivision thereof or therein) and all interest,
penalties or similar liabilities with respect thereto (all such nonexcluded
taxes, levies, imposts, duties, fees, assessments or other charges being
referred to collectively as "Taxes"). If any Taxes are so levied or imposed, the
Borrowers agree to pay the full amount of such Taxes, and such additional
amounts as may be necessary so that every payment of all amounts due under this
Agreement or under any Note, after withholding or deduction for or on account of
any Taxes, will not be less than the amount provided for herein or in such Note.
If any amounts are payable in respect of Taxes pursuant to the preceding
sentence, the Borrowers agree to reimburse each Lender, upon the written request
of such Lender, for taxes imposed on or measured by the net income or net
profits of such Lender pursuant to the laws of the jurisdiction in which the
principal office or applicable lending office of such Lender is located or under
the laws of any political subdivision or taxing authority of any such
jurisdiction in which the principal office or applicable lending office of such
Lender is located and for any withholding of taxes as such Lender shall
determine are payable by, or withheld from, such Lender in respect of such
amounts so paid to or on behalf of such Lender pursuant to the preceding
sentence and in respect of any amounts paid to or on behalf of such Lender
pursuant to this sentence; provided, however, that no such reimbursement shall
be required unless such Lender determines that the amount of such Taxes exceeds
the amount of any credit, allowance or deduction allowable to such Lender as an
offset against any Taxes payable on behalf of such Lender and in such event
reimbursement shall not be required in any amount greater than such excess. The
Borrowers will furnish to the Agent within 45 days after the date the payment of
any Taxes is due pursuant to applicable law certified copies of tax receipts
evidencing such payment by the Borrowers. The Borrowers agree, jointly and
severally, to

                                      -29-
<PAGE>
indemnify and hold harmless each Lender and the Agent, and reimburse such Lender
and the Agent upon their written request, for the amount of any Taxes so levied
or imposed and paid by such Lender or the Agent. A certificate as to the amount
of any such required indemnification payment prepared by such Lender or the
Agent shall be final, conclusive and binding for all purposes absent manifest
error.

          (b) Each Lender that is not a United States person (as such term is
defined in Section 7701(a)(30) of the Code) agrees to deliver to the Borrowers
and the Agent on or prior to the Effective Date, or in the case of a Lender that
is an assignee or transferee of an interest under this Agreement pursuant to
Section 1.13 or 12.04 (unless the respective Lender was already a Lender
hereunder immediately prior to such assignment or transfer), on the date of such
assignment or transfer to such Lender, (i) two accurate and complete original
signed copies of Internal Revenue Service Form 4224 or 1001 (or successor forms)
certifying to such Lender's entitlement to a complete exemption from United
States withholding tax with respect to payments to be made under this Agreement
and under any Note, or (ii) if the Lender is not a "bank" within the meaning of
Section 881(c)(3)(A) of the Code and cannot deliver either Internal Revenue
Service Form 1001 or 4224 pursuant to clause (i) above, (x) a certificate
substantially in the form of Exhibit C (any such certificate, a "Section
4.04(b)(ii) Certificate") and (y) two accurate and complete original signed
copies of Internal Revenue Service Form W-8 (or successor form) certifying to
such Lender's entitlement to a complete exemption from United States withholding
tax with respect to payments of interest to be made under this Agreement and
under any Note. In addition, each Lender agrees that from time to time after the
Effective Date, when a lapse in time or change in circumstances renders the
previous certification obsolete or inaccurate in any material respect, it will
deliver promptly to the Borrowers and the Agent two new accurate and complete
original signed copies of Internal Revenue Service Form 4224 or 1001, or Form
W-8 and a Section 4.04(b)(ii) Certificate, as the case may be, and such other
forms as may be required in order to confirm or establish the entitlement of
such Lender to a continued exemption from or reduction in United States
withholding tax with respect to payments under this Agreement and any Note, or
it shall immediately notify the Borrowers and the Agent of its inability to
deliver any such Form or Certificate in which case such Lender shall not be
required to deliver any such Form or Certificate pursuant to this Section
4.04(b). Notwithstanding anything to the contrary contained in Section 4.04(a),
but

                                      -30-
<PAGE>
subject to Section 12.04(b) and the immediately succeeding sentence, (x) the
Borrowers shall be entitled, to the extent they are required to do so by law, to
deduct or withhold income or similar taxes imposed by the United States (or any
political subdivision or taxing authority thereof or therein) from interest,
fees or other amounts payable hereunder for the account of any Lender which is
not a United States person (as such term is defined in Section 7701(a)(30) of
the Code) for U.S. Federal income tax purposes to the extent that such Lender
has not provided to the Borrowers U.S. Internal Revenue Service Forms that
establish a complete exemption from such deduction or withholding and (y) the
Borrowers shall not be obligated pursuant to Section 4.04(a) hereof to gross-up
payments to be made to a Lender in respect of income withholding or similar
taxes imposed by the United States if (I) such Lender has not provided to the
Borrowers the Internal Revenue Service Forms required to be provided to the
Borrowers pursuant to this Section 4.04(b) or (II) in the case of a payment,
other than interest, to a Lender described in clause (ii) above, to the extent
that such Forms do not establish a complete exemption from withholding of such
taxes. Notwithstanding anything to the contrary contained in the preceding
sentence or elsewhere in this Section 4.04 and except as set forth in Section
12.04(b), the Company agrees to indemnify each Lender and the Agent in the
manner set forth in Section 4.04(a) (without regard to the identity of the
jurisdiction requiring the deduction or withholding) in respect of any amounts
deducted or withheld by it as described in the immediately preceding sentence as
a result of any changes after the Effective Date in any applicable law, treaty,
governmental rule, regulation, guideline or order, or in the interpretation
thereof, relating to the deducting or withholding of income or similar Taxes.

          SECTION 5. Conditions Precedent. The obligation of each Lender to make
each Loan to a Borrower hereunder, and the obligation of the Letter of Credit
Issuer to issue each Letter of Credit hereunder, is subject, at the time of each
such Credit Event (except as otherwise hereinafter indicated), to the
satisfaction of the following conditions:

          5.01 Execution of Agreement; Notes. On or prior to the Initial
Borrowing Date, (i) the Effective Date shall have occurred and (ii) there shall
have been delivered to the Agent for the account of each Lender the appropriate
Revolving Note executed by the Borrowers and in the amount, maturity and as
otherwise provided herein.

                                      -31-
<PAGE>
          5.02 No Default; Representations and Warranties. At the time of each
Credit Event and also after giving effect thereto, (i) there shall exist no
Default or Event of Default and (ii) all representations and warranties
contained herein and in the other Credit Documents in effect at such time shall
be true and correct in all material respects with the same effect as though such
representations and warranties had been made on and as of the date of such
Credit Event, unless stated to relate to a specific earlier date, in which case
such representations and warranties shall be true and correct in all material
respects as of such earlier date.

          5.03 Officer's Certificate. On the Initial Borrowing Date, the Agent
and Co-Agent shall have received a certificate dated such date signed by an
appropriate officer of the Company stating that all of the applicable conditions
set forth in Sections 5.02, 5.06, 5.07, 5.08, 5.09 (deleting the reference to
the Agent and Co-Agent therein), 5.10(a) and (b) (deleting the reference to the
Agent and Co-Agent therein), 5.14, exist as of such date.

          5.04 Opinions of Counsel. On the Initial Borrowing Date, the Agent and
Co-Agent shall have received opinions, addressed to the Agent and Co-Agent and
each of the Lenders and dated the Initial Borrowing Date, from Porter & Hedges,
L.L.P., counsel to the Credit Parties, in the form of Exhibit D-1, which opinion
shall cover such matters incident to the transactions contemplated herein and in
the other Credit Documents as the Agent and Co-Agent may reasonably request and
shall be in form and substance reasonably satisfactory to the Agent and
Co-Agent.

          5.05 Corporate Proceedings. (a) On the Initial Borrowing Date, the
Agent and Co-Agent shall have received from each Credit Party a certificate,
dated the Initial Borrowing Date, signed by the chairman, a vice chairman, the
president or any vice-president of such Credit Party, and attested to by the
secretary or any assistant secretary of such Credit Party, in the form of
Exhibit E with appropriate insertions, together with copies of the Certificate
of Incorporation and By-Laws of such Credit Party and the resolutions of such
Credit Party referred to in such certificate and all of the foregoing (including
each such Certificate of Incorporation and By-Laws) shall be reasonably
satisfactory to the Agent and Co-Agent.

          (b) On the Initial Borrowing Date, all corporate and legal proceedings
and all instruments and agreements in

                                      -32-
<PAGE>
connection with the transactions contemplated by the Credit Documents shall be
reasonably satisfactory in form and substance to the Agent and Co-Agent, and the
Agent and Co-Agent shall have received all information and copies of all
certificates, documents and papers, including good standing certificates,
bring-down certificates and any other records of corporate proceedings and
governmental approvals, if any, which the Agent and Co-Agent reasonably may have
requested in connection therewith, such documents and papers, where appropriate,
to be certified by proper corporate or governmental authorities.

          5.06 Adverse Change, etc. At the time of each Credit Event and after
giving effect thereto, nothing shall have occurred since September 30, 1996 (and
neither the Lenders nor the Agent and Co-Agent shall have become aware of any
facts or conditions not previously known) which (a) have, or could reasonably be
expected to have, a material adverse effect on the rights or remedies of the
Lenders or the Agent and Co-Agent, or on the ability of any Credit Party to
perform its obligations to them hereunder or under any other Credit Document or
(b) have, or could reasonably be expected to have, a Material Adverse Effect.

          5.07 Litigation. At the time of each Credit Event and after giving
effect thereto, there shall be no actions, suits or proceedings pending or
threatened (a) with respect to this Agreement or any other Document or the
Acquisition or (b) which could reasonably be expected to (i) have a Material
Adverse Effect or (ii) have a material adverse effect on the Acquisition, the
rights or remedies of the Lenders or the Agent or Co-Agent hereunder or under
any other Credit Document or on the ability of any Credit Party to perform its
respective obligations to the Lenders or the Agent or Co-Agent hereunder or
under any other Credit Document.

          5.08 Approvals. On or prior to the Initial Borrowing Date, all
necessary governmental (domestic and foreign) and third party approvals in
connection with the Acquisition, the transactions contemplated by the Credit
Documents and otherwise referred to herein or therein shall have been obtained
and remain in effect, and all applicable waiting periods shall have expired
without any action being taken by any competent authority which restrains,
prevents or imposes materially adverse conditions upon the consummation of the
Acquisition, the transactions contemplated by the Documents and otherwise
referred to herein or therein. Additionally, there shall not exist any judgment,
order, injunction or other restraint

                                      -33-
<PAGE>
issued or filed or a hearing seeking injunctive relief or other restraint
pending or notified prohibiting or imposing materially adverse conditions upon
the consummation of the Acquisition or the making of Loans.

          5.09 Consummation of the Acquisition. On the Initial Borrowing Date,
DI shall have consummated the Acquisition in accordance with the terms and
conditions of the Acquisition Agreement, without amendment thereto or the waiver
of any of the conditions to closing therein other than any amendment or waiver
satisfactory to the Agent and the Co-Agent.

          5.10 Existing Credit Agreement. (a) On the Initial Borrowing Date, the
commitments under the Existing Credit Agreement shall have been terminated, all
loans thereunder shall have been repaid in full, together with all accrued and
unpaid interest thereon, all accrued and unpaid fees thereon shall have been
repaid in full, all letters of credit issued thereunder shall have been
terminated or incorporated hereunder as Letters of Credit, and all other amounts
then owing pursuant to the Existing Credit Agreement shall have been repaid in
full.

          (b) On the Initial Borrowing Date, all security interests and Liens
created under the Existing Credit Agreement and the related security documents
on the capital stock of, and assets (including intercompany notes) owned by, the
Company and its Subsidiaries shall have been terminated and released, and the
Agent and Co-Agent shall have received all such releases as may have been
requested by the Agent and Co-Agent, which releases shall be in the form and
substance reasonably satisfactory to the Agent and Co-Agent.

          (c) The Agent and Co-Agent shall have received evidence from the
lenders under the Existing Credit Agreement in form, scope and substance
reasonably satisfactory to it that the matters set forth in this Section 5.10(a)
and (b) have been satisfied at such time.

          5.11 Security Documents. (a) On the Initial Borrowing Date, each
Credit Party shall have duly authorized, executed and delivered a Pledge
Agreement in the form of Exhibit F (as modified, amended or supplemented from
time to time in accordance with the terms thereof and hereof, the "Pledge
Agreement") and shall have delivered to the Collateral Agent, as pledgee
thereunder, all of the Pledged Securities referred to therein accompanied by
executed and undated stock powers in

                                      -34-
<PAGE>
the case of capital stock, and the Pledge Agreement shall be in full force and
effect.

          (b) On the Initial Borrowing Date, each Credit Party shall have duly
authorized, executed and delivered a Security Agreement in the form of Exhibit G
(as modified, amended or supplemented from time to time in accordance with the
terms thereof and hereof, the "Security Agreement") covering all of the Security
Agreement Collateral, together with:

          (A) executed copies of Financing Statements (Form UCC-1) or
     appropriate local equivalent in appropriate form for filing under the UCC
     or appropriate local equivalent of each jurisdiction as may be necessary to
     perfect the security interests purported to be created by the Security
     Agreement;

          (B) certified copies of Requests for Information or Copies (Form
     UCC-11), or equivalent reports, each of a recent date listing all effective
     financing statements that name the Company or any of its Domestic
     Subsidiaries as debtor and that are filed in the jurisdictions referred to
     in clause (A) above, together with copies of such financing statements that
     name the Company or any of its Domestic Subsidiaries as debtor (none of
     which shall cover the Collateral except (x) those with respect to which
     appropriate termination statements executed by the secured lender
     thereunder have been delivered to the Agent and Co-Agent and (y) to the
     extent evidencing Permitted Liens);

          (C) evidence of the completion of all other recordings and filings of,
     or with respect to, the Security Agreement as may be necessary or, in the
     reasonable opinion of the Collateral Agent, desirable, to perfect the
     security interests purported to be created by the Security Agreement; and

          (D) evidence that all other actions necessary or, in the reasonable
     opinion of the Collateral Agent, desirable, to perfect the security
     interests purported to be created by the Security Agreement have been
     taken;

and the Security Agreement shall be in full force and effect.

          5.12  Payment of Fees.  On or before the Initial Bor-
rowing Date and thereafter at the time of each Credit Event and

                                      -35-
<PAGE>
after giving effect thereto, all costs, fees and expenses, and all other
compensation related to the transactions contemplated by this Agreement due to
the Agent or Co-Agent or the Lenders (including, without limitation, legal fees
and expenses) shall have been paid to the extent then due.

          5.13 Existing Indebtedness Agreements. On or prior to the Initial
Borrowing Date, there shall have been delivered to the Agent or Co-Agent copies,
certified as true and correct by an appropriate officer of the Company, of:

          (a) all agreements evidencing or relating to the Existing Indebtedness
     that are to remain in effect after giving effect to the consummation of the
     Acquisition (collectively, the "Existing Indebtedness Agreements"); and

          (b)  all agreements and documents relating to the
     Acquisition (collectively, the "Transaction Documents");

all of which agreements and documents shall be (x) in form and substance
satisfactory to the Agent or Co-Agent and (y) in full force and effect on the
Initial Borrowing Date.

          Prior to the Initial Borrowing Date, the Norex Loan shall have been
paid in full and all debts thereunder permanently retired. The agreements and
documents reflecting such payments and termination of the Norex Loan shall be
(x) in form and substance satisfactory to the Agent and Co-Agent and (y)
delivered to the Agent and in full force and effect on the Initial Borrowing
Date.

          5.14 Solvency Certificate; Evidence of Insurance. On the Initial
Borrowing Date, the Agent and Co-Agent shall have received:

          (a) one or more solvency certificates in the form of Exhibit I from
     the chief financial officer of the Company and of DI and dated the Initial
     Borrowing Date, in each case, addressed to the Agent and Co-Agent and each
     Lender, and reciting that, both prior to and after giving effect to the
     Acquisition and the incurrence of all financings contemplated herein, the
     Company and DI (on a stand-alone basis) are not and will not be rendered
     insolvent or inadequately capitalized for the respective businesses they
     intend to conduct and have not and will not have incurred debts beyond
     their ability to pay as they mature and that,

                                      -36-
<PAGE>
     upon consummation of the Acquisition, (x) the total assets of the Company
     and DI exceed the amount necessary to pay all of their liabilities and to
     pay any distribution preference on any outstanding preferred stock upon
     dissolution and (y) the amount by which the total assets of the Company and
     DI exceeds and will exceed their liabilities is no less than their stated
     capital; and that neither the Company nor any of its Subsidiaries is
     entering into the Acquisition or this Agreement with the intent to hinder,
     delay or defraud any creditor of the Company or any of its Subsidiaries;
     and

          (b) (i) a report from a third party, in form and substance
     satisfactory to the Agent and Co-Agent, regarding the adequacy of the
     insurance coverage on the assets of the Company and its Subsidiaries and
     (ii) evidence of insurance complying with the requirements of Section 7.03
     for the business and properties of the Company and its Subsidiaries, in
     scope, form and substance reasonably satisfactory to the Agent and Co-Agent
     and naming the Collateral Agent as an additional insured and/or loss payee,
     and stating that such insurance shall not be cancelled or revised without
     at least 30 days' (or 10 days' in the case of non-payment of premium) prior
     written notice by the insurer to the Collateral Agent.

          5.15 Rig Appraisals. On or prior to the Initial Borrowing Date, the
Agent and Co-Agent shall have received an appraisal of the value of each rig
owned by the Company and its Subsidiaries, in form and substance satisfactory to
the Agent and Co-Agent, from an Approved Appraiser. A complete record of all
drilling rigs, including location, owned by the Company and its Subsidiaries, is
set forth in Annex IV hereto.

          5.16 Environmental Report. On or prior to the Initial Borrowing Date,
the Agent and Co-Agent shall have received a Phase I environmental report
pertaining to the Real Properties of the Company and its Subsidiaries, in form
and substance satisfactory to the Agent and Co-Agent.

          5.17 Pro Forma Balance Sheet. On or prior to the Initial Borrowing
Date, there shall have been delivered to the Agent and Co-Agent an unaudited pro
forma consolidated balance sheet of the Company and its Subsidiaries as of
December 31, 1996 after giving effect to the Acquisition and the borrowings to
occur on the Initial Borrowing Date, together with a related funds flow
statement, which pro forma balance sheet and funds

                                      -37-
<PAGE>
flow statement shall be reasonably satisfactory in form and substance to the
Agent and Co-Agent and the Required Lenders.

          5.18 Notice of Borrowing; Letter of Credit Request. The Agent shall
have received a Notice of Borrowing satisfying the requirements of Section 1.03
with respect to each incurrence of Loans; and the Agent and the Letter of Credit
Issuer shall have received a Letter of Credit Request satisfying the
requirements of Section 2.02 with respect to each issuance of a Letter of
Credit.

          The acceptance of the benefits of each Credit Event shall constitute a
representation and warranty by each Credit Party to the Agent and Co-Agent and
each of the Lenders that all of the applicable conditions specified above exist
as of the date of such Credit Event. All of the certificates, legal opinions and
other documents and papers referred to in this Section 5, unless otherwise
specified, shall be delivered to the Agent at the Notice Office for the account
of each of the Lenders and, except for the Notes, in sufficient counterparts for
each of the Lenders and shall be reasonably satisfactory in form and substance
to the Agent and Co-Agent and the Required Lenders.

          SECTION 6. Representations, Warranties and Agreements. In order to
induce the Lenders to enter into this Agreement and to make the Loans and issue
and/or participate in the Letters of Credit provided for herein, the Borrowers,
jointly and severally, make the following representations, warranties and
agreements with the Lenders (in each case after giving pro forma effect to the
Acquisition including the repayment of Indebtedness under the Existing Credit
Agreement) all of which shall survive the execution and delivery of this
Agreement, the making of the Loans and the issuance of the Letters of Credit
(with the occurrence of each Credit Event being deemed to constitute a
representation and warranty that the matters specified in this Section 6 are
true and correct in all material respects on and as of the date of each such
Credit Event, unless stated to relate to a specific earlier date in which case
such representations and warranties shall be true and correct in all material
respects as of such earlier date):

          6.01 Corporate Status. Each of the Company and its Subsidiaries (i) is
a duly organized and validly existing cor- poration in good standing under the
laws of the jurisdiction of its organization, (ii) has the requisite corporate
power and authority to own its property and assets and to transact the

                                      -38-
<PAGE>
business in which it is engaged and presently proposes to engage and (iii) is
duly qualified and is authorized to do business and is in good standing in all
jurisdictions where it is required to be so qualified and where the failure to
be so qualified would have a Material Adverse Effect.

          6.02 Corporate Power and Authority. Each Credit Party has the
requisite corporate power and authority to execute, deliver and carry out the
terms and provisions of the Credit Documents to which it is a party and has
taken all necessary corporate action to authorize the execution, delivery and
performance of the Credit Documents to which it is a party. Each Credit Party
has duly executed and delivered each Credit Document to which it is a party and
each such Credit Document constitutes the legal, valid and binding obligation of
such Credit Party enforceable in accordance with its terms, except to the extent
that the enforceability thereof may be limited by applicable bankruptcy,
insolvency, reorganization, moratorium or similar laws generally affecting
creditors' rights and by equitable principles (regardless of whether enforcement
is sought in equity or at law).

          6.03 No Violation. Neither the execution, delivery or performance by
any Credit Party of the Credit Documents to which it is a party nor compliance
by any Credit Party with the terms and provisions thereof, nor the consummation
of the transactions contemplated herein or therein, (i) will contravene any
applicable provision of any law, statute, rule or regulation, or any order,
writ, injunction or decree of any court or governmental instrumentality, (ii)
will conflict or be inconsistent with or result in any breach of, any of the
terms, covenants, conditions or provisions of, or constitute a default under, or
(other than pursuant to the Security Documents) result in the creation or
imposition of (or the obligation to create or impose) any Lien upon any of the
property or assets of the Company or any of its Subsidiaries pursuant to the
terms of any indenture, mortgage, deed of trust, loan agreement, credit
agreement or any other agreement or instrument to which the Company or any of
its Subsidiaries is a party or by which it or any of its property or assets are
bound or to which it may be subject, other than such conflicts, inconsistencies,
breaches, defaults or impositions which could not, individually or in the
aggregate, have a Material Adverse Effect or (iii) will violate any provision of
the Certificate of Incorporation or By-Laws of the Company or any of its
Subsidiaries.

                                      -39-
<PAGE>
          6.04 Litigation. There are no actions, suits or proceedings pending
or, to the knowledge of the Company or any of its Subsidiaries, threatened, with
respect to the Company or any of its Subsidiaries (i) that are likely to have a
Material Adverse Effect, except as set forth on Schedule 6.04, or (ii) that
could reasonably be expected to have a material adverse effect on the rights or
remedies of the Agent or Co-Agent or the Lenders or on the ability of any Credit
Party to perform its respective obligations to the Agent or Co-Agent or the
Lenders hereunder and under the other Credit Documents to which it is, or will
be, a party. Additionally, there does not exist any judgment, order or
injunction prohibiting or imposing material adverse conditions upon the
occurrence of any Credit Event.

          6.05 Use of Proceeds; Margin Regulations. (a) The proceeds of the
Loans shall be utilized (I) on the Initial Borrowing Date to (i) consummate the
Acquisition, (ii) pay existing debt and (iii) pay fees and expenses in
connection with the Acquisition; provided that such borrowings on the Initial
Borrowing Date shall not exceed $25,000,000 and (II) on and after the Initial
Borrowing Date (subject to the terms and conditions contained in the Credit
Documents) (i) to make other land rig acquisitions and (ii) for the general
corporate purposes of the Company and its Subsidiaries.

          (b) Neither the making of any Loan, nor the use of the proceeds
thereof, will violate the provisions of Regulation G, T, U or X of the Board of
Governors of the Federal Reserve System and no part of the proceeds of any Loan
will be used to purchase or carry any Margin Stock or to extend credit for the
purpose of purchasing or carrying any Margin Stock.

          6.06 Governmental Approvals. Except for filings with applicable
governmental authority contemplated by the Security Documents, all of which
shall be made in accordance with such Security Documents, no order, consent,
approval, license, authorization, or validation of, or filing, recording or
registration with, or exemption by, any foreign or domestic governmental or
public body or authority, or any subdivision thereof, is required to authorize
or is required in connection with (i) the execution, delivery and performance of
any Credit Document or (ii) the legality, validity, binding effect or
enforceability of any Credit Document.

          6.07 Investment Company Act. Neither the Company nor any of its
Subsidiaries is an "investment company" or a

                                      -40-
<PAGE>
company "controlled" by an "investment company," within the meaning of the
Investment Company Act of 1940, as amended.

          6.08 Public Utility Holding Company Act. Neither the Company nor any
of its Subsidiaries is a "holding company," or a "subsidiary company" of a
"holding company," or an "affiliate" of a "holding company" or of a "subsidiary
company" of a "holding company," within the meaning of the Public Utility
Holding Company Act of 1935, as amended.

          6.09 True and Complete Disclosure. All factual information (taken as a
whole) heretofore or contemporaneously furnished by or on behalf of the Company
or any of its Subsidiaries in writing to the Agent, Co-Agent or any Lender
(including, without limitation, all information contained in the Credit
Documents) for purposes of or in connection with the Credit Documents or any
transaction contemplated therein is, and all other such factual information
(taken as a whole) hereafter furnished by or on behalf of any such Persons in
writing to the Agent, Co-Agent or any Lender will be, true and accurate in all
material respects on the date as of which such information is dated or certified
and not incomplete by omitting to state any material fact necessary to make such
information (taken as a whole) not misleading at such time.

          6.10 Financial Condition; Financial Statements. (a) On and as of the
Initial Borrowing Date, on a pro forma basis after giving effect to the
Acquisition and to all Indebtedness incurred, and to be incurred, and Liens
created, and to be created, by each Credit Party in connection therewith, (x)
the sum of the assets, at a fair valuation (i.e., the amount that may be
realized within a reasonable time, considered to be six months to one year,
either through collection or sale at the regular market value, conceiving the
latter as the amount that would be obtained for such assets within such period
by a capable and diligent businessman from an interested buyer who is willing to
purchase under ordinary selling conditions), of each of the Company and its
Subsidiaries (on a consolidated basis) and DI (on a stand-alone basis) will
exceed its debts, (y) each Credit Party has not incurred nor intended to, nor
believes that it will, incur debts beyond its ability to pay such debts as such
debts mature and (z) each Credit Party will have sufficient capital with which
to conduct its business. For purposes of this Section 6.10, "debt" means any
liability on a claim, and "claim" means (i) right to payment whether or not such
a right is reduced to judgment, liquidated, unliquidated, fixed, contingent,
matured, unmatured, disputed, undisputed, legal,

                                      -41-
<PAGE>
equitable, secured or unsecured or (ii) right to an equitable remedy for breach
of performance if such breach gives rise to a payment, whether or not such right
to an equitable remedy is reduced to judgment, fixed, contingent, matured,
unmatured, disputed, undisputed, secured or unsecured; provided that to the
extent any such "claim" is not fixed, the amount thereof shall equal the
Company's good faith estimate of the likely maximum amount thereof.

          (b) The annual and interim financial statements included in the
Company's Proxy Statement mailed on or about August 2, 1996, as supplemented by
the Company's Quarterly Report on Form 10-Q for the quarter ended September 30,
1996 and the Company's current report on Form 8-K dated November 4, 1996 (both
as to the Company and as to its Subsidiaries on a combined basis) (including
statements of income and cash flows and changes in shareholders' equity),
present fairly in all material respects the financial condition of the relevant
Persons at the dates of said statements and the results for the periods covered
thereby. All such financial statements have been prepared in accordance with
GAAP consistently applied (except as therein noted) and the financial statements
as of and for the fiscal years have been audited by and accompanied by the
opinion of Deloitte & Touche, LLP or KPMG Peat Marwick, independent public
accountants.

          (c) Since September 30, 1996 and except as disclosed to the Agent and
the Co-Agent in a memorandum dated December 6, 1996 (the "Memorandum"), nothing
has occurred that has had or could reasonably be expected to have a Material
Adverse Effect.

          (d) Except as fully reflected in the financial statements described in
Section 6.10(b) and the Indebtedness incurred under this Agreement and except as
set forth in Schedule 6.10 hereto, (i) there were as of the Initial Borrowing
Date (and after giving effect to any Loans made on such date), no liabilities or
obligations (excluding obligations or liabilities (i) incurred in the ordinary
course of business, which, individually or in the aggregate, could not
reasonably be expected to have a Material Adverse Effect and (ii) disclosed to
the Agent and the Co-Agent in the Memorandum) with respect to the Company or any
of its Subsidiaries of any nature whatsoever (whether absolute, accrued,
contingent or otherwise and whether or not due), and (ii) neither the Company
nor any of its Subsidiaries knows of any basis for the assertion against the
Company or any of its Subsidiaries of any such liability or obligation which,
either individually or in the aggregate, has,

                                      -42-
<PAGE>
or could be reasonably likely to have, a Material Adverse Effect.

          6.11 Security Interests. On and after the Initial Borrowing Date, each
of the Security Documents creates (or after the execution and delivery thereof
and, where applicable, filing and/or recording thereof will create), as security
for the Obligations, a valid and enforceable perfected security interest in and
Lien on all of the Collateral subject thereto, superior to and prior to the
rights of all third Persons, and subject to no Liens other than Prior Liens and
Liens permitted under the Security Documents. No filings or recordings are
required in order to perfect the security interests created under any Security
Document except for filings or recordings required in connection with any such
Security Document which shall have been made on or prior to the Initial
Borrowing Date as contemplated by Section 5.11(b) or on or prior to the
execution and delivery thereof as contemplated by Sections 7.11 and 8.14.

          6.12 Acquisition. At the time of consummation of the Acquisition, all
consents and approvals of, and filings and registrations with, and all other
actions in respect of, all governmental agencies, authorities or
instrumentalities required to make or consummate the Acquisition shall have been
obtained, given, filed or taken or waived and are or will be in full force and
effect (or effective judicial relief with respect thereto has been obtained)
except where the failure to obtain, give, file, or take would not reasonably be
expected to have a Material Adverse Effect. All applicable waiting periods with
respect thereto have or, prior to the time when required, will have, expired
without, in all such cases, any action being taken by any competent authority
which restrains, prevents, or imposes material adverse conditions upon the
Acquisition. Additionally, there does not exist any judgment, order or
injunction prohibiting or imposing material adverse conditions upon the
Acquisition, or the occurrence of any Credit Event or the performance by the
Company and its Subsidiaries of their obligations under the Documents and all
applicable laws. The Acquisition has been consummated in accordance with the
Acquisition Agreement and all applicable laws.

          6.13 Compliance with ERISA. (a) The Company, its respective
Subsidiaries and its respective ERISA Affiliates are in compliance with all
applicable provisions of ERISA and the Code and the published regulations and
interpretations thereunder with respect to all employee benefit plans (as
defined in

                                      -43-
<PAGE>
Section 3(3) of ERISA); no Reportable Event has occurred with respect to a Plan;
no Plan is insolvent or in reorganization; no Plan has an Unfunded Current
Liability; no Plan has an accumulated or waived funding deficiency, has
permitted decreases in its funding standard account or has applied for a waiver
of the minimum funding standard or an extension of any amortization period
within the meaning of Section 412 of the Code; all contributions required to be
made with respect to a Plan and a Foreign Pension Plan have been timely made;
neither the Company nor any Subsidiary of the Company nor any ERISA Affiliate
has incurred any liability to or on account of a Plan pursuant to Section 409,
502(i), 502(l), 515, 4062, 4063, 4064, 4069, 4201, 4204 or 4212 of ERISA or
Section 401(a)(29), 4971, 4975 or 4980 of the Code or reasonably expects to
incur any liability (including any indirect, contingent or secondary liability)
under any of the foregoing Sections with respect to any Plan (other than
liabilities of any ERISA Affiliate which could not, by operation of law or
otherwise, become a liability of the Company or any of its Subsidiaries); no
proceedings have been instituted to terminate, or to appoint a trustee to
administer, any Plan; no condition exists which presents a material risk to the
Company or any Subsidiary of the Company or any ERISA Affiliate of incurring a
liability to or on account of a Plan pursuant to the foregoing provisions of
ERISA and the Code; using actuarial assumptions and computation methods
consistent with subpart 1 of subtitle E of Title IV of ERISA, the aggregate
liabilities of the Company and its Subsidiaries and its ERISA Affiliates to all
Multiemployer Plans in the event of a complete withdrawal therefrom, as of the
close of the most recent fiscal year of each such Plan ended prior to the date
of the most recent Credit Event, would not, singly or in the aggregate, result
in a Material Adverse Effect; no lien imposed under the Code or ERISA on the
assets of the Company or any Subsidiary of the Company or any ERISA Affiliate
exists or is reasonably likely to arise on account of any Plan; and the Company
and its Subsidiaries do not maintain or contribute to any employee welfare
benefit plan (as defined in Section 3(1) of ERISA) which provides benefits to
retired employees or other former employees (other than as required by Section
601 of ERISA) or any employee pension benefit plan (as defined in Section 3(2)
of ERISA) the obligations with respect to which could reasonably be expected,
singly or in the aggregate, to have a Material Adverse Effect.

          (b) Notwithstanding the foregoing, the representations, warranties and
agreements contained in this Section 6.13 are qualified such that a breach or
failure thereof shall not

                                      -44-
<PAGE>
be treated as such unless the circumstances of such breach or failure have
resulted in or are reasonably expected to result in either (i) a Material
Adverse Effect or (ii) the imposition of a lien on the assets of the Company or
any Subsidiary.

          6.14 Capitalization. On the Initial Borrowing Date, the authorized
capital stock of the Company shall consist of (i) 300,000,000 shares of common
stock, $.10 par value per share (the "Company Common Stock"), of which
approximately 123,283,934 shares are issued and outstanding as of December 26,
1996 (plus up to 1,750,000 shares to be issued in connection with the
cancellation of the Norex Loan) and (ii) 10,000 shares of Series B Preferred
Stock, $1.00 par value per share, none of which are outstanding. All outstanding
shares of the Company Common Stock have been duly and validly issued, and are
fully paid and nonassessable. The Company does not have outstanding any
securities convertible into or exchangeable for its capital stock or outstanding
any rights to subscribe for or to purchase, or any options for the purchase of,
or any agreement providing for the issuance (contingent or otherwise) of, or any
calls, commitments or claims of any character relating to, its capital stock
except for options to purchase the Company Common Stock issued or to be issued
to certain officers, employees and directors and consultants of the Company and
its Subsidiaries and except for approximately 720,000 shares of mandatorily
redeemable Series A Preferred Stock of the Company.

          6.15 Subsidiaries. On and as of the Initial Borrowing Date and after
giving effect to the consummation of the Acquisition, the Company has no
Subsidiaries other than those Subsidiaries listed on Annex VI. Annex VI
correctly sets forth, as of the Initial Borrowing Date and after giving effect
to the Acquisition, the percentage ownership (direct and indirect) of the
Company in each class of capital stock of each of its Subsidiaries and also
identifies the direct owner thereof. The Company owns all of the issued and
outstanding capital stock of DI, and no other Person has any securities
convertible into or exchangeable for any capital stock of DI, or any rights to
subscribe for or to the purchase, or any options for the purchase of, or any
calls, commitments or claims relating to, any of DI's capital stock.

          6.16 Intellectual Property. Each of the Company and each of its
Subsidiaries owns or holds a valid license to use all the patents, trademarks,
permits, service marks, trade names, technology, know-how and formulas or other
rights with

                                      -45-
<PAGE>
respect to the foregoing, free from restrictions that are adverse to the use
thereof, that are used in the operation of the business of the Company and each
of its Subsidiaries as presently conducted, except where any failure to do so or
restrictions could, individually or in the aggregate, have a Material Adverse
Effect.

          6.17 Compliance with Statutes, etc. Each of the Company and each of
its Subsidiaries is in compliance with all applicable statutes, regulations and
orders of, and all applicable restrictions imposed by, all governmental bodies,
domestic or foreign, in respect of the conduct of its business and the ownership
of its property (provided, however, that this Section 6.17 does not apply to (i)
compliance with respect to Environmental Laws, as to which no representation is
made in this Section 6.17, but which is covered by Section 6.18 hereof, (ii)
compliance with respect to Taxes, as to which no representation is made in this
Section 6.17, but which is covered by Section 6.21 hereof, (iii) compliance with
respect to ERISA, as to which no representation is made in this Section 6.17,
but which is covered by Section 6.13 hereof, and (iv) compliance with respect to
labor relations matters, as to which no representation is made in this Section
6.17, but which is covered by Section 6.20), except such non-compliance as is
not likely to, individually or in the aggregate, have a Material Adverse Effect.

          6.18 Environmental Matters. Except as set forth in Schedule 6.18: (a)
Each of the Company and each of its Subsidiaries, and their respective
businesses and Real Property, has complied with, and on the date of each Credit
Event is in compliance with, all applicable Environmental Laws and the
requirements of any permits, licenses or other authorizations issued under such
Environmental Laws. There are no pending or past or, to the best knowledge of
the Company and its Subsidiaries, threatened Environmental Claims against the
Company or any of its Subsidiaries or any Real Property currently or formerly
owned or operated by the Company or any of its Subsidiaries. There are no facts,
circumstances, conditions or occurrences on any Real Property currently or
formerly owned or operated by the Company or any of its Subsidiaries or, to the
best knowledge of the Company and its Subsidiaries, on any property adjoining or
in the vicinity of any such Real Property that would reasonably be expected (i)
to form the basis of an Environmental Claim against the Company or any of its
Subsidiaries or any such Real Property or (ii) to cause any such Real Property
to be subject to any restrictions on the ownership,

                                      -46-
<PAGE>
occupancy, use or transferability of such Real Property by the Company or any of
its Subsidiaries under any applicable Environmental Law.

          (b) Hazardous Materials have not at any time been generated, used,
treated or stored on, or transported to or from, any Real Property currently or
formerly owned or operated by the Company or any of its Subsidiaries where such
generation, use, treatment or storage has violated or could reasonably be
expected to violate any Environmental Law. Hazardous Materials have not at any
time been Released on or from any Real Property currently or formerly owned or
operated by the Company or any of its Subsidiaries. There are not now any
underground storage tanks or related piping located on any Real Property
currently or formerly owned or operated by the Company or any of its
Subsidiaries.

          (c) Notwithstanding anything to the contrary in this Section 6.18, the
representations made in this Section 6.18 shall only be untrue if either the
individual or aggregate effect of all conditions, failures, noncompliances,
Environmental Claims, Releases and presence of underground storage tanks or
related piping, in each case of the types described above, could reasonably be
expected to have a Material Adverse Effect.

          6.19 Properties. Each of the Company and each of its Subsidiaries has
good and marketable title to, or a validly subsisting leasehold interest in, all
material properties owned or leased by it, including all Real Property reflected
in the financial statements referred to in Section 6.10(b), free and clear of
all Liens, other than Prior Liens and Permitted Liens.

          6.20 Labor Relations. Neither the Company nor any of its Subsidiaries
is engaged in any unfair labor practice that could reasonably be expected to
have a Material Adverse Effect. There is (i) no unfair labor practice complaint
pending against the Company or any of its Subsidiaries or threatened against any
of them, before the National Labor Relations Board, and no grievance or
arbitration proceeding arising out of or under any collective bargaining
agreement is so pending against the Company or any of its Subsidiaries or, to
the best knowledge of the Company, threatened against any of them, (ii) no
strike, labor dispute, slowdown or stoppage pending against the Company or any
of its Subsidiaries or, to the best knowledge of the Company, threatened against
the Company or any of its Subsidiaries and (iii) no union representation
question existing with respect to the employees of the Company or any of

                                      -47-
<PAGE>
its Subsidiaries and no union organizing activities are taking place, except
(with respect to any matter specified in clause (i), (ii) or (iii) above, either
individually or in the aggregate) such as is not reasonably likely to have a
Material Adverse Effect.

          6.21 Tax Returns and Payments. All Federal, state and other material
returns, statements, forms and reports for taxes (the "Returns") required to be
filed by or with respect to the income, properties or operations of the Company
and/or any of its Subsidiaries have been timely filed with the appropriate
taxing authority. The Returns accurately reflect all liability for taxes of the
Company and its Subsidiaries for the periods covered thereby. The Company and
each of its Subsidiaries have paid all taxes payable by them other than
immaterial taxes and other taxes which are not yet due and payable, and other
than taxes contested in good faith and for which adequate reserves have been
established in accordance with GAAP. Except as disclosed in the financial
statements referred to in Section 6.10(b), (a) there is no material action,
suit, proceeding, investigation, audit or claim now pending or threatened by any
authority regarding any taxes relating to the Company or any of its Subsidiaries
and (b) neither the Company nor any of its Subsidiaries (nor any other person on
their behalf or as part of a consolidated group) has entered into an agreement
or waiver or been requested to enter into an agreement or waiver extending any
statute of limitations relating to the payment or collection of taxes of the
Company or any of its Subsidiaries, or is aware of any circumstances that would
cause the taxable years or other taxable periods of the Company or any of its
Subsidiaries not to be subject to the normally applicable statute of
limitations. Neither the Company nor any of its Subsidiaries (nor any other
person on their behalf or as part of a consolidated group) has provided, with
respect to themselves or property held by them, any consent under Section 341 of
the Code. Neither the Company nor any of its Subsidiaries has incurred, or will
incur, any material tax liability in connection with the Acquisition and the
other transactions contemplated hereby.

          6.22 Existing Indebtedness. Annex VII sets forth a true and complete
list of all Indebtedness of the Company and its Subsidiaries (other than (i)
Indebtedness consisting of Capital Lease Obligations related to motor vehicles
not in excess of $1,000,000 in the aggregate and (ii) other Indebtedness which
in the aggregate does not exceed $50,000) as of the Initial Borrowing Date and
which is to remain outstanding after

                                      -48-
<PAGE>
giving effect to the Acquisition and the incurrence of Loans on such date
(excluding the Loans and the Letters of Credit, the "Existing Indebtedness"), in
each case showing the aggregate principal amount thereof and the name of the
respective borrower and any other entity which directly or indirectly guaranteed
such debt. Annex III sets forth a true and complete list of all Existing Letters
of Credit (the "Existing Letters of Credit") of the Company and its Subsidiaries
as of the Initial Borrowing Date.

          SECTION 7. Affirmative Covenants. The Borrowers, jointly and
severally, hereby covenant and agree that as of the Initial Borrowing Date and
thereafter for so long as this Agreement is in effect and until the Total
Revolving Loan Commitment has terminated, no Letters of Credit or Notes are
outstanding and the Loans and Unpaid Drawings, together with interest, Fees and
all other Obligations (other than any indemnities described in Section 12.13
which are not then due and payable) incurred hereunder, are paid in full:

          7.01  Information Covenants.  The Company will fur-
nish to each Lender:

          (a) Monthly Reports. (i) Within 45 days after the end of each fiscal
     month of the Company, the consolidated balance sheet of the Company and its
     Subsidiaries as at the end of such fiscal month and the related
     consolidated statements of income and statements of cash flows for such
     fiscal month and for the elapsed portion of the fiscal year ended with the
     last day of such fiscal month, in each case setting forth comparable
     budgeted figures for the current fiscal month and year-to-date results, all
     of which shall be certified by the chief financial officer or other
     Authorized Officer of the Company, subject to normal year-end audit
     adjustments and the absence of footnotes, (ii) within 15 days after the end
     of each fiscal month of the Company, a report as of the last day of such
     month detailing the status of all operating Drilling Rigs including (x) the
     location of each such Drilling Rig, (y) the projected term of, type of and
     parties to any contract relating to each such Drilling Rig and (z) the day
     rates under such contract for each such Drilling Rig and (iii) within 15
     days after the end of each fiscal month of the Company, a Collateral Report
     in the form of Exhibit M hereto.

                                      -49-
<PAGE>
          (b) Quarterly Financial Statements. Within 45 days after the close of
     each of the first three quarterly accounting periods in each fiscal year of
     the Company, the consolidated balance sheet of the Company and its
     Subsidiaries as at the end of such quarterly accounting period and the
     related consolidated statements of income, statements of changes in
     stockholders equity and statements of cash flows for such quarterly
     accounting period and for the elapsed portion of the fiscal year ended with
     the last day of such quarterly accounting period; all of which shall be in
     the form such information is submitted to the SEC if the Company is a
     reporting company, and, if not, in the same form as would have been
     submitted to the SEC and accompanied by a certification by the chief
     financial officer or other Authorized Officer of the Company that they
     fairly present in all material respects the financial condition of the
     Company and its Subsidiaries as of the dates indicated and the results of
     their operations and changes in their cash flows for the periods indicated,
     subject in all cases to normal year-end audit adjustments and the absence
     of footnotes.

          (c) Annual Financial Statements. Within 90 days after the close of
     each fiscal year of the Company, the consolidated balance sheet of the
     Company and its Subsidiaries as at the end of such fiscal year and the
     related consolidated statements of income, statements of changes in
     stockholders equity and statements of cash flows for such fiscal year and
     certified by KPMG Peat Marwick or such other independent certified public
     accountants of recognized national standing, in each case to the effect
     that such statements fairly present in all material respects the financial
     condition of the Company and its Subsidiaries as of the dates indicated and
     the results of their operations and cash flows, together with a certificate
     of such accounting firm stating that in the course of its regular audit of
     the business of the Company and its Subsidiaries, which audit was conducted
     in accordance with generally accepted auditing standards, no Default or
     Event of Default which has occurred and is continuing has come to their
     attention insofar as such Default or Event of Default relates to financial
     and accounting matters or, if such a Default or an Event of Default has
     come to their attention a statement as to the nature thereof.

          (d) Budgets, etc. Except for the 1997 budget which shall be delivered
     before January 31, 1997, no later than

                                      -50-
<PAGE>
     the commencement of each fiscal year of the Company, budgets of and for the
     Company and its Subsidiaries in reasonable detail for each month of the
     succeeding fiscal year, as customarily prepared by management for its
     internal use setting forth, with appropriate discussion, the principal
     assumptions upon which such budgets are based.

          (e) Officer's Certificates. At the time of the delivery of the
     financial statements provided for in Section 7.01(b) and (c), a certificate
     of the chief financial officer or other Authorized Officer of the Company
     to the effect than no Default or Event of Default exists or, if any Default
     or Event of Default does exist, specifying the nature and extent thereof,
     which certificate shall set forth the calculations required to establish
     whether the Company and its Subsidiaries were in compliance with the
     provisions of Sections 8.04(d) and (g), 8.08, 8.09, 8.10 and 8.11, as at
     the end of such fiscal quarter or fiscal year, as the case may be.

          (f) Notice of Default or Litigation. Promptly, and in any event within
     five Business Days (or 10 Business Days in the case of clause (y) below)
     after any executive or senior officer of the Company obtains actual
     knowledge thereof, notice of (x) the occurrence of any event which
     constitutes a Default or an Event of Default, which notice shall specify
     the nature thereof, the period of existence thereof and what action the
     Company proposes to take with respect thereto and (y) the commencement of,
     or threat of, any litigation or governmental proceeding pending against the
     Company or any of its Subsidiaries which is reasonably likely to have a
     Material Adverse Effect, or a material adverse effect on the ability of any
     Credit Party to perform its respective obligations hereunder or under any
     other Credit Document.

          (g) Auditors' Reports. Promptly upon receipt thereof, a copy of each
     report or "management letter" submitted to the Company or any of its
     Subsidiaries by its independent accountants in connection with any annual,
     interim or special audit made by them of the books of the Company or any of
     its Subsidiaries.

          (h) Environmental Matters. Promptly, and in any event, within five
     Business Days after obtaining knowledge of any of the following (but only
     to the extent that any

                                      -51-
<PAGE>
     of the following, either individually or in the aggregate, could have a
     Material Adverse Effect), written notice of:

               (i) any pending or threatened Environmental Claim against the
          Company or any of its Subsidiaries or any Real Property currently or
          formerly owned or operated by the Company or any of its Subsidiaries;

              (ii) any condition or occurrence on any Real Property currently or
          formerly owned or operated by the Company or any of its Subsidiaries
          that (x) results in material noncompliance by the Company or any of
          its Subsidiaries with any applicable Environmental Law or (y) could
          reasonably be anticipated to form the basis of an Environmental Claim
          against the Company or any of its Subsidiaries or any such Real
          Property;

             (iii) any condition or occurrence on any Real Property currently or
          formerly owned or operated by the Company or any of its Subsidiaries
          that could reasonably be anticipated to cause such Real Property to be
          subject to any material restrictions on the ownership, occupancy, use
          or transferability by the Company or its Subsidiary, as the case may
          be, of its interest in such Real Property under any Environmental Law;
          and

              (iv) the taking of any material removal, remedial corrective or
          other response action in response to the actual or alleged presence of
          any Hazardous Material on any Real Property currently or formerly
          owned or operated by the Company or any of its Subsidiaries.

     All such notices shall describe in reasonable detail the nature of the
     claim, investigation, condition, occurrence or removal, remedial,
     corrective or other response action and the Company's response thereto. In
     addition, the Company agrees to provide the Lenders with copies of all
     material written communications by or to the Company or any of its
     Subsidiaries with or from any Person, government or governmental agency
     relating to any of the matters set forth in clauses (i)-(iv) above, and
     such detailed reports relating to any of the matters set forth in clauses
     (i)-(iv) above as may reasonably be requested by the Agent, Co-Agent or the
     Required Lenders.

                                      -52-
<PAGE>
          (i) Other Information. Promptly upon transmission thereof, copies of
     any filings and registrations with, and reports to, the SEC by the Company
     or any of its Subsidiaries and copies of all financial statements, proxy
     statements, notices and reports as the Company or any of its Subsidiaries
     shall send generally to analysts or the holders of their capital stock in
     their capacity as such holders (to the extent not theretofore delivered to
     the Lenders pursuant to this Agreement) and, with reasonable promptness,
     such other information or documents (financial or otherwise) as the Agent
     or Co-Agent on their own behalf or on behalf of the Required Lenders may
     reasonably request from time to time.

          7.02 Books, Records and Inspections. The Company will, and will cause
each of its Subsidiaries to, permit, upon notice to the chief financial officer
or other Authorized Officer of the Company, officers and designated
representatives of the Agent, Co-Agent or the Required Lenders to visit and
inspect any of the properties or assets of the Company and any of its
Subsidiaries in whomsoever's possession, and to examine the books of account of
the Company and of any of its Subsidiaries and discuss the affairs, finances and
accounts of the Company and of any of its Subsidiaries with, and be advised as
to the same by, their officers and independent accountants, all at such
reasonable times and intervals and to such reasonable extent as the Agent,
Co-Agent or the Required Lenders may desire.

          7.03 Insurance. The Company will, and will cause each of its
Subsidiaries to, at all times maintain in full force and effect insurance with
reputable and solvent insurance carriers in such amount, covering such risks and
liabilities and with such deductibles or self-insured retentions as are in
accordance with past practice of the Company and its Subsidiaries. The Company
will furnish to the Agent on the Initial Borrowing Date (see Annex VIII hereto )
and on each such later date as the Agent, Co-Agent or the Required Lenders may
reasonably request a summary of the insurance carried in respect of the Company
and its Subsidiaries and the assets of the Company and its Subsidiaries together
with certificates of insurance and other evidence of such insurance, if any,
naming the Collateral Agent as an additional insured and/or loss payee as
required pursuant to the next paragraph of this Section 7.03.

          Each policy or certificate with respect to insurance of the Pledged
Collateral shall be endorsed to Collateral

                                      -53-
<PAGE>
Agent's satisfaction for the benefit of Collateral Agent (including, without
limitation, by naming Collateral Agent as an additional named insured or sole
loss payee, as required by Collateral Agent) and such policy or certificate
shall be delivered to Collateral Agent. Each such policy shall state that it
cannot be cancelled without 30 days' prior written notice to Collateral Agent.
At least 10 days prior to the expiration of any such policy of insurance, the
appropriate Credit Party shall deliver to Collateral Agent an extension or
renewal policy or an insurance certificate evidencing renewal or extension of
such policy. If any such Credit Party shall fail to insure such Pledged
Collateral in accordance with this Section 7.03 or if any Credit Party shall
fail to so endorse and deposit, or to extend or renew, all such insurance
policies or certificates with respect thereto, Collateral Agent shall have the
right (but shall be under no obligation) to advance funds to procure or renew or
extend such insurance and each Credit Party agrees to reimburse Collateral Agent
for all costs and expenses thereof, with interest on all such funds from the
date advanced until paid in full at the highest rate then in effect under the
Credit Agreement. Collateral Agent agrees that it shall provide notice to the
applicable Credit Party that it has advanced funds on its behalf pursuant to
this Section 7.03.

          7.04 Payment of Taxes. The Company will pay and discharge, and will
cause each of its Subsidiaries to pay and discharge, all taxes, assessments and
governmental charges or levies imposed upon it or upon its income or profits, or
upon any properties belonging to it, prior to the date on which material
penalties attach thereto, and all lawful claims for sums that have become due
and payable which, if unpaid, might become a Lien not otherwise permitted under
Section 8.03(a) or charge upon any properties of the Company or any of its
Subsidiaries; provided that neither the Company nor any of its Subsidiaries
shall be required to pay any such tax, assessment, charge, levy or claim which
is being contested in good faith and by proper proceedings if it has maintained
adequate reserves with respect thereto in accordance with GAAP.

          7.05 Corporate Franchises. The Company will do, and will cause each of
its Subsidiaries to do, or cause to be done, all things necessary to preserve
and keep in full force and effect its existence and its material rights,
franchises and authority to do business; provided, however, that any transaction
permitted by Section 8.02 will not constitute a breach of this Section 7.05.

                                      -54-
<PAGE>
          7.06 Compliance with Statutes, etc. The Company will, and will cause
each of its Subsidiaries to, comply with all applicable statutes, regulations
and orders of, and all applicable restrictions imposed by, all governmental
bodies, domestic or foreign, in respect of the conduct of its business and the
ownership of its property (provided, however, that this Section 7.06 does not
apply to applicable statutes, regulations, orders and restrictions relating to
environmental standards and controls, as to which no covenant is made in this
Section 7.06, but which are referred to in Section 7.07 hereof) except for such
noncompliance as would not, singly or in the aggregate, have a Material Adverse
Effect or a material adverse effect on the ability of any Credit Party to
perform its obligations under any Credit Document to which it is a party.

          7.07 Compliance with Environmental Laws. (a) The Company will pay, and
will cause each of its Subsidiaries to pay, all costs and expenses incurred by
it in keeping in compliance in all material respects with, and avoiding
liability under, all Environmental Laws, and will keep or cause to be kept all
Real Properties owned or operated by the Company or any of its Subsidiaries free
and clear of any Liens imposed pursuant to such Environmental Laws; and (b)
neither the Company nor any of its Subsidiaries will generate, use, treat,
store, release or dispose of, or permit the generation, use, treatment, storage,
release or disposal of, Hazardous Materials on any Real Property owned or
operated by the Company or any of its Subsidiaries, or transport or permit the
transportation of Hazardous Materials to or from any such Real Property, where
the failure to comply with clause (a) or clause (b) above, either individually
or in the aggregate, could reasonably be expected to result in a Material
Adverse Effect. If the Company or any of its Subsidiaries, or any tenant or
occupant of any Real Property owned or operated by the Company or any of its
Subsidiaries, causes or permits any intentional or unintentional act or omission
resulting in, or otherwise discovers, the presence or Release of any Hazardous
Material (except in compliance with applicable Environmental Laws), the Company
agrees to undertake, and/or to cause any of its Subsidiaries, tenants or
occupants to undertake, promptly and at their sole expense, any clean up,
investigation, removal, remedial, corrective or other action required pursuant
to Environmental Laws to investigate, remove or cleanup any Hazardous Materials
from any Real Property where the failure to do so, either individually or in the
aggregate, could reasonably be expected to result in a Material Adverse Effect;
provided that neither the Company nor any of its Subsidiaries shall be required
to comply

                                      -55-
<PAGE>
with any such order or directive which is being contested in good faith and by
proper proceedings so long as it has maintained adequate reserves with respect
to such compliance to the extent required in accordance with GAAP.

          7.08 ERISA. As soon as possible and, in any event, within 30 days
after the Company knows or has reason to know of the occurrence of any of the
following events to the extent that one or more of such events is reasonably
likely to result in a material liability to the Company or any Subsidiary of the
Company, the Company will deliver to each of the Lenders a certificate of the
chief financial officer or other Authorized Officer of the Company setting forth
details as to such occurrence and the action, if any, which the Company, such
Subsidiary or such ERISA Affiliate is required or proposes to take, together
with any notices required or proposed to be given to or filed with or by the
Company, the Subsidiary, the ERISA Affiliate, the PBGC, a Plan participant or
the Plan administrator with respect thereto: that a Reportable Event has
occurred; that an accumulated funding deficiency (as such term is defined in
Section 412(a) of the Code) has been incurred or an application is reasonably
expected to be or has been made to the Secretary of the Treasury for a waiver or
modification of the minimum funding standard (including any required installment
payments) or an extension of any amortization period under Section 412 of the
Code with respect to a Plan; that a contribution required to be made to a Plan
or Foreign Pension Plan has not been timely made; that a Plan has been or is
reasonably expected to be terminated, reorganized, partitioned or declared
insolvent under Title IV of ERISA; that a Plan has an Unfunded Current Liability
giving rise to a lien under ERISA or the Code; that proceedings are reasonably
expected to be or have been instituted to terminate or appoint a trustee to
administer a Plan; that a proceeding has been instituted pursuant to Section 515
of ERISA to collect a delinquent contribution to a Plan; that the Company, any
Subsidiary of the Company or any ERISA Affiliate will or is reasonably expected
to incur any material liability (including any contingent or secondary
liability) to or on account of the termination of or withdrawal from a Plan
under Section 4062, 4063, 4064, 4069, 4201, 4204 or 4212 of ERISA or with
respect to a Plan under Section 401(a)(29), 4971, 4975 or 4980 of the Code or
Section 409, 502(i) or 502(l) of ERISA; or that the Company or any Subsidiary of
the Company has or is reasonably expected to incur any material liability under
any employee welfare benefit plan (within the meaning of Section 3(l) of ERISA)
that provides benefits to retired employees or other former employees (other

                                      -56-
<PAGE>
than as required by Section 601 of ERISA) or any employee pension benefit plan
(as defined in Section 3(2) of ERISA). At the request of any Lender, the Company
will deliver to such Lender a complete copy of the annual report (Form 5500) of
each Plan required to be filed with the Internal Revenue Service. In addition to
any certificates or notices delivered to the Lenders pursuant to the first
sentence hereof, at the request of the Agent and Co-Agent or any Lender, copies
of annual reports and any notices received by the Company or any Subsidiary of
the Company or any ERISA Affiliate with respect to any Plan or Foreign Pension
Plan shall be delivered to the Lenders no later than 30 days after the date such
report has been filed with the Internal Revenue Service or received by the
Company or the Subsidiary or the ERISA Affiliate.

          7.09 Good Repair. The Company will, and will cause each of its
Subsidiaries to, ensure that its material properties, its operating drilling
rigs and other equipment used in its business are kept in good repair, working
order and condition, normal wear and tear and damage by casualty excepted, and
that from time to time there are made in such properties and equipment all
needful and proper repairs, renewals, replacements, extensions, additions,
betterments and improvements thereto, to the extent and in the manner useful or
customary for companies in similar businesses.

          7.10 End of Fiscal Years; Fiscal Quarters. The Company will, for
financial reporting purposes, cause (i) its fiscal years to end on or about
December 31 of each year and (ii) its fiscal quarters to end on or about March
31, June 30 and September 30 of each year; provided that the Company may change
such fiscal year to any other fiscal year period of twelve consecutive months
with the consent of the Agent and Co-Agent.

          7.11 Additional Security; Further Assurances; Appraisals. (a)
Promptly, and in any event within 30 days after the acquisition of assets of the
type that would have constituted Collateral (if the person acquiring such assets
had executed an appropriate Security Document on the Initial Borrowing Date) at
the Initial Borrowing Date (the "Additional Collateral"), the Company will, and
will cause each of the Guarantors to, at the request of the Collateral Agent
following consultation with the Company as to the value of any such Additional
Collateral, take all necessary action, including entering into the appropriate
security documents and filing the appropriate financing statements under the
provisions of the UCC or applicable foreign, domestic or local laws, rules or

                                      -57-
<PAGE>
regulations in each of the offices where such filing is necessary or appropriate
to grant the Collateral Agent a perfected Lien in such Collateral (or comparable
interest under foreign law in the case of foreign Collateral) pursuant to and to
the full extent required by the Security Documents and this Agreement; provided
that no such action will be required by the Company or any Guarantor to the
extent that any such Additional Collateral is subject to a preexisting agreement
which prohibits the granting of any additional liens; provided further that such
preexisting agreement was not entered into in connection with, or in
anticipation of or contemplation of, the acquisition of such assets by the
Company or any of its Subsidiaries. In the event that the Company or a Guarantor
acquires an interest in Real Property with a value in excess of $3 million, the
Company or such Guarantor, as the case may be, will take such actions and
execute such documents as the Collateral Agent shall require to create a
mortgage on such Real Property for the benefit of the Lenders. All actions taken
by the parties in connection with the pledge of Additional Collateral,
including, without limitation, costs of counsel for the Collateral Agent, shall
be for the account of the Company, which shall pay all sums due on demand.

          (b) The Company will, and will cause each of the Guarantors to, at the
expense of the Company, make, execute, endorse, acknowledge, file and/or deliver
to the Collateral Agent from time to time such vouchers, invoices, schedules,
confirmatory assignments, conveyances, financing statements, transfer
endorsements, powers of attorney, certificates, real property surveys, reports
and other assurances or instruments and take such further steps relating to the
Collateral covered by any of the Security Documents as the Collateral Agent may
reasonably require. Furthermore, the Company shall cause to be delivered to the
Collateral Agent such opinions of counsel, title insurance and other related
documents as may be reasonably requested by the Collateral Agent to assure
itself that this Section 7.11 has been complied with.

          (c) The Company will provide to the Agent and CoAgent a formal
Appraisal of Fair Market Value and Orderly Liquidation Value, which shall be in
form and substance reasonably satisfactory to the Agent and Co-Agent, prepared
in respect of the Drilling Rigs and Related Equipment constituting Collateral,
with such appraisals to be provided (x) annually (within 45 days after the end
of each fiscal year beginning at the end of fiscal year 1997) at the Company's
expense, (y) upon request from the Agent on behalf of the Lenders one additional

                                      -58-
<PAGE>
time per year at the Company's expense and (z) at any time at the Lenders'
expense. Any such appraisal requested pursuant to (y) or (z) in the preceding
sentence shall be supplied to the Agent and Co-Agent within 30 days of such
request.

          (d) The Company agrees that each action required above by Section
7.11(a) and (b) shall be completed within 60 days after such action is either
requested to be taken by the Agent or the Required Lenders or required to be
taken by the Company or any Subsidiary Guarantor pursuant to the terms of this
Section 7.11; provided that in no event shall the Company or any of its
Subsidiaries be required to take any action, other than using its best efforts,
to obtain consents from third parties with respect to its compliance with this
Section 7.11.

          7.12 Register. The Borrower hereby designates the Agent to serve as
the Borrower's agent, solely for purposes of this Section 7.12, to maintain a
register (the "Register") on which they will record the Revolving Loan
Commitment from time to time of each of the Lenders, the Revolving Loans made by
each of the Lenders and each repayment in respect of the principal amount of the
Revolving Loans of each Lender. Failure to make any such recordation, or any
error in such recordation shall not affect the Borrower's obligations in respect
of such Revolving Loans. With respect to any Lender, the transfer of the
Revolving Loan Commitment of such Lender and the rights to the principal of, and
interest on, any Revolving Loan made pursuant to such Revolving Loan Commitment
shall not be effective until such transfer is recorded on the Register
maintained by the Agent with respect to ownership of such Revolving Loan
Commitment and Revolving Loans and prior to such recordation all amounts owing
to the transferor with respect to such Revolving Loan Commitment and Revolving
Loans shall remain owing to the transferor. The registration of assignment or
transfer of all or part of any Revolving Loan Commitment and Revolving Loans
shall be recorded by the Agent on the Register only upon the acceptance by the
Agent of a properly executed and delivered Assignment and Assumption Agreement
pursuant to Section 12.04(b). Coincident with the delivery of such an Assignment
and Assumption Agreement to the Agent for acceptance and registration of
assignment or transfer of all or part of a Revolving Loan, or as soon thereafter
as practicable, the assigning or transferor Lender shall surrender the Revolving
Note evidencing such Revolving Loan, and thereupon one or more new Revolving
Notes in the same aggregate principal amount shall be issued to the assigning or
transferor Lender and/or the new Lender. The

                                      -59-
<PAGE>
Borrower agrees to indemnify the Agent from and against any and all losses,
claims, damages and liabilities of whatsoever nature which may be imposed on,
asserted against or incurred by the Agent in performing its duties under this
Section 7.12, except to the extent that any such losses, claims, damages or
liabilities are found to have resulted from the gross negligence or willful
misconduct of the Agent.

          SECTION 8. Negative Covenants. The Borrowers, jointly and severally,
hereby covenant and agree that as of the Initial Borrowing Date and thereafter
for so long as this Agreement is in effect and until the Total Revolving Loan
Commitment has terminated, no Letters of Credit or Notes are outstanding and the
Loans, together with interest, Fees and all other Obligations (other than any
indemnities described in Section 12.13 which are not then due and payable)
incurred hereunder, are paid in full:

          8.01 Changes in Business. The Company and its Subsidiaries will not
engage in any business other than the businesses in which the Company and its
Subsidiaries are engaged in as of the Effective Date and activities incidental
thereto, and similar or related businesses.

          8.02 Consolidation, Merger, Sale or Purchase of Assets, etc. The
Company will not, and will not permit any of its Subsidiaries to, wind up,
liquidate or dissolve its affairs or enter into any transaction of merger or
consolidation, or convey, sell, lease or otherwise dispose of (or agree to do
any of the foregoing at any future time) all or any part of its property or
assets (other than sales, transfers or other dispositions of inventory in the
ordinary course of business, including sales of inventory on consignment in the
ordinary course of business), or enter into any partnerships, joint ventures or
sale-leaseback transactions, or purchase or otherwise acquire (in one or a
series of related transactions) any part of the property or assets (other than
purchases or other acquisitions of inventory, materials and equipment in the
ordinary course of business) of any Person, except that the following shall be
permitted:

          (a) the Company and its Subsidiaries may, as lessee or lessor, enter
     into operating leases in the ordinary course of business with respect to
     real or personal property;

                                      -60-
<PAGE>
          (b) the advances, investments and loans permitted pursuant to Section
     8.05;

          (c) the Company and its Subsidiaries may sell or discount, in each
     case without recourse, accounts receivable arising in the ordinary course
     of business, but only in connection with the compromise or collection
     thereof;

          (d) without limitation to clause (c), the Company and its Subsidiaries
     may sell or exchange specific items of machinery or equipment, so long as
     the proceeds of each such sale or exchange is used (or contractually
     committed to be used) to acquire (and results within 180 days of such sale
     or exchange in the acquisition of) replacement items of machinery or
     equipment which are the functional equivalent of the item of equipment so
     sold or exchanged;

          (e) the Company and its Subsidiaries may, in the ordinary course of
     business, license, as licensor or licensee, patents, trademarks, copyrights
     and know-how to third Persons and to one another, so long as any such
     license by the Company or its Subsidiaries in its capacity as licensor is
     permitted to be assigned pursuant to the Security Agreement (to the extent
     that a security interest in such patents, trademarks, copyrights and
     know-how is granted thereunder) and does not otherwise prohibit the
     granting of a Lien by the Company or any of its Subsidiaries pursuant to
     the Security Agreement in the intellectual property covered by such
     license;

          (f) the assets of any Foreign Subsidiary of the Company may be
     transferred to the Company or any of its Subsidiaries, and any Foreign
     Subsidiary of the Company may be merged with and into, or be dissolved or
     liquidated into, the Company or any of its Subsidiaries so long as the
     Company or such Subsidiary is the surviving corporation of any such merger,
     dissolution or liquidation;

          (g) any Domestic Subsidiary of the Company (other than DI) may
     transfer assets to the Company or to any other Domestic Subsidiary of the
     Company, so long as (i) if the transferee is a Subsidiary, such Subsidiary
     is a Credit Party and (ii) the security interests granted to the Collateral
     Agent for the benefit of the Secured Creditors pursuant to the Security
     Documents in the assets so transferred shall remain in full force and
     effect and

                                      -61-
<PAGE>
     perfected (to at least the same extent as in effect imme- diately prior to
     such transfer);

          (h) any Domestic Subsidiary of the Company (other than DI) may merge
     with and into, or be dissolved or liquidated into, the Company so long as
     (i) the Company is the surviving corporation of any such merger,
     dissolution or liquidation and (ii) the security interests granted to the
     Collateral Agent for the benefit of the Secured Creditors pursuant to the
     Security Documents in the assets of such Domestic Subsidiary shall remain
     in full force and effect and perfected (to at least the same extent as in
     effect immediately prior to such merger, dissolution or liquidation);

          (i) any Domestic Subsidiary of the Company (other than DI) may merge
     with and into, or be dissolved or liquidated into, any Domestic Subsidiary
     of the Company so long as (i) such Domestic Subsidiary is a Credit Party
     and is the surviving corporation of any such merger, dissolution or
     liquidation and (ii) the security interests granted to the Collateral Agent
     for the benefit of the Secured Creditors pursuant to the Security Documents
     in the assets of such Domestic Subsidiary shall remain in full force and
     effect and perfected (to at least the same extent as in effect immediately
     prior to such merger, dissolution or liquidation);

          (j) so long as no Default or Event of Default then exists or would
     result therefrom (including giving pro forma effect to such acquisition and
     any additional Indebtedness resulting therefrom or incurred or assumed in
     connection therewith as if such acquisition had occurred and such
     Indebtedness had been incurred as of the first day of the most recently
     completed Test Period (including any other Permitted Acquisition that
     occurred, and related Indebtedness that was incurred, during such Test
     Period)), the Company and its Wholly-Owned Subsidiaries may acquire assets
     or the capital stock of any Person (any such acquisition permitted by this
     clause (j), a "Permitted Acquisition"); provided that (i) such Person (or
     the assets so acquired) was, immediately prior to such acquisition, engaged
     (or used) primarily in the business permitted pursuant to Section 8.01,
     (ii) if such acquisition is structured as a stock or other equity
     acquisition, then either (A) the Person so acquired becomes a Wholly-Owned
     Subsidiary of the Company or (B) such Person is merged with and

                                      -62-
<PAGE>
     into the Company or a Wholly-Owned Subsidiary of the Company (with the
     Company or such Wholly-Owned Subsidiary being the surviving corporation of
     such merger), and in any case, all of the provisions of Section 8.14 have
     been complied with in respect of such Person and (iii) any Liens or
     Indebtedness assumed or issued in connection with such acquisition is
     otherwise permitted under Section 8.03 or 8.04, as the case may be;
     provided, however, that in connection with Permitted Acquisitions effected
     by Foreign Subsidiaries or involving the direct or indirect acquisition of
     assets located outside the continental United States or the stock of an
     entity incorporated in any jurisdiction which is not part of the United
     States, the aggregate consideration (other than Indebtedness incurred or
     assumed in connection with such Permitted Acquisitions) for all such
     Permitted Acquisitions shall not exceed $1 million; and provided, further,
     that the Company shall have delivered to the Agent and Co-Agent a
     certificate of the Chief Financial Officer of the Company showing
     compliance (in reasonable detail as to pro forma calculations) with all of
     the provisions of this paragraph (j);

          (k) leases or subleases granted by the Company or any of its
     Subsidiaries to third Persons not interfering in any material respect with
     the business of the Company or any of its Subsidiaries;

          (l) "inactive" or "shell" Subsidiaries may be dis- solved or otherwise
     liquidated; and

          (m)  sales of those assets listed on Annex X hereto.

To the extent the Required Lenders waive the provisions of this Section 8.02
with respect to the sale or other disposition of any Collateral, or any
Collateral is sold or otherwise disposed of as permitted by this Section 8.02,
such Collateral in each case shall be sold or otherwise disposed of free and
clear of the Liens created by the Security Documents and the Collateral Agent
shall take such actions as are appropriate in connection therewith.

          8.03 Liens. The Company will not, and will not per- mit any Subsidiary
to, create, incur, assume or suffer to exist any Lien upon or with respect to
any item constituting Collat- eral except for the Lien of the Security Documents
relating thereto, the Prior Liens applicable thereto and other Liens expressly
permitted by such Security Documents. The Company

                                      -63-
<PAGE>
will not, and will not permit any of its Subsidiaries to, create, incur, assume
or suffer to exist any Lien upon or with respect to any property or assets of
the Company or such Subsidiary which does not constitute Collateral, whether now
owned or hereafter acquired, or sell any such property or assets subject to an
understanding or agreement, contingent or otherwise, to repurchase such property
or assets or assign any right to receive income, or file or permit the filing of
any financing statement under the UCC or any other similar notice of Lien under
any similar recording or notice statute, except the following (collectively
referred to as "Permitted Liens"):

          (a) inchoate Liens for taxes, assessments or governmental charges of
     levies not yet due or Liens for taxes, assessments or governmental charges
     or levies being contested in good faith and by appropriate proceedings for
     which adequate reserves have been established in accordance with GAAP;

          (b) Liens in respect of property or assets of the Company or any of
     its Subsidiaries imposed by law which were incurred in the ordinary course
     of business or in connection with any Capital Expenditure permitted by the
     terms of this Agreement and which have not arisen to secure Indebtedness
     for borrowed money, such as carriers', warehousemen's and mechanics' Liens,
     statutory landlord's Liens, and other similar Liens arising in the ordinary
     course of business, and which either (x) do not in the aggregate materially
     detract from the value of such property or assets or materially impair the
     use thereof in the operation of the business of the Company or any of its
     Subsidiaries or (y) are being contested in good faith by appropriate
     proceedings, which proceedings have the effect of preventing the forfeiture
     or sale of the property or asset subject to such Lien;

          (c) Liens in existence on the Initial Borrowing Date which are listed,
     and the property subject thereto described, in Annex IX, and extensions,
     renewals or related refinancings thereof, provided that such extensions,
     renewals or related refinancings pursuant to Section 8.04(b) (x) do not
     increase the obligations so secured and (y) do not apply to additional
     assets not subject to the lien being extended or renewed;

                                      -64-
<PAGE>
          (d) Liens arising from judgments, decrees or attachments in
     circumstances not constituting an Event of Default under Section 9.09;

          (e) Liens incurred or deposits made (x) in the ordinary course of
     business in connection with workers' compensation, unemployment insurance
     and other types of social security, or to secure the performance of
     tenders, statutory obligations, surety and appeal bonds, bids, government
     contracts, performance and return-of-money bonds and other similar
     obligations incurred in the ordinary course of business (exclusive of
     obligations in respect of the payment for borrowed money); and (y) to
     secure the performance of leases of Real Property, to the extent incurred
     or made in the ordinary course of business consistent with past practices;

          (f) licenses, leases or subleases granted to third Persons not
     interfering in any material respect with the business of the Company or any
     of its Subsidiaries;

          (g) easements, zoning restrictions, rights-of-way, restrictions, minor
     defects or irregularities in title and other similar charges or or
     encumbrances not interfering in any material respect with the ordinary
     conduct of the business of the Company or any of its Subsidiaries;

          (h) Liens arising from precautionary UCC financing statements
     regarding operating leases permitted by this Agreement;

          (i) any interest or title of a licensor, lessor or sublessor under any
     license or lease permitted by this Agreement;

          (j) Liens created pursuant to Capital Leases permit- ted pursuant to
     Section 8.04(d);

          (k) Liens arising pursuant to purchase money mortgages or security
     interests securing Indebtedness representing the purchase price (or
     financing of the purchase price within 90 days after the respective
     purchase) of assets acquired after the Initial Borrowing Date; provided
     that (i) any such Liens attach only to the assets so purchased, (ii) the
     Indebtedness secured by any such Lien (including refinancings thereof) does
     not exceed 100% of the lesser of the fair market value or the purchase
     price

                                      -65-
<PAGE>
     of the property being purchased at the time of the incurrence of such
     Indebtedness and (iii) the Indebtedness secured thereby is permitted to be
     incurred pursuant to Section 8.04(d);

          (l) Liens on property or assets acquired pursuant to a Permitted
     Acquisition, or on property or assets of a Subsidiary of the Company in
     existence at the time such Subsidiary is acquired pursuant to a Permitted
     Acquisition; provided that (i) any Indebtedness that is secured by such
     Liens is permitted to exist under Section 8.04(i), and (ii) such Liens are
     not incurred in connection with, or in contemplation or anticipation of,
     such Permitted Acquisition and do not attach to any other asset of the
     Company or any of its Subsidiaries;

          (m) Liens granted with respect to Indebtedness incurred pursuant to
     Section 8.04(g); provided that the collateral subject to such Lien is Cash
     or Cash Equivalents and does not have an aggregate value in excess of
     $250,000; and

          (n) additional Liens (on assets other than the Collateral) incurred by
     the Company and its Subsidiaries so long as the aggregate value of the
     property subject to such Liens, and the Indebtedness and other obligations
     secured thereby, do not exceed $350,000.

          8.04 Indebtedness. The Company will not, and will not permit any of
its Subsidiaries to, contract, create, incur, assume or suffer to exist any
Indebtedness, except:

          (a) Indebtedness incurred pursuant to this Agreement and the other
     Credit Documents;

          (b) Existing Indebtedness outstanding on the Initial Borrowing Date
     and listed on Annex VII, including any extensions, refinancings,
     replacements or restructurings thereof, provided that the then outstanding
     principal amount thereof is not increased nor the maturity thereof
     shortened;

          (c) Indebtedness under Interest Rate Protection Agreement and Other
     Hedging Agreements permitted by Section 8.05(d);

                                      -66-
<PAGE>
          (d) Capitalized Lease Obligations and Indebtedness of the Company and
     its Subsidiaries incurred pursuant to purchase money Liens permitted under
     Section 8.03(k); provided that the sum of (x) the aggregate Capitalized
     Lease Obligations (excluding up to $1,000,000 of Motor Vehicle Capitalized
     Lease Obligations) outstanding at any time plus (y) the aggregate principal
     amount of such purchase money Indebtedness (excluding therefrom any
     insurance premiums paid in monthly installments) outstanding at such time
     shall not exceed $500,000 (including Capital Lease Obligations referred to
     on Annex VII);

          (e) Indebtedness constituting Intercompany Loans to the extent
     permitted by Section 8.05(g);

          (f) Indebtedness consisting of guaranties (x) by the Company of
     Indebtedness, leases and other contractual obligations permitted to be
     incurred by Subsidiaries of the Company that are Guarantors and (y) by
     Foreign Subsidiaries of the Company of Indebtedness, leases and other
     contractual obligations permitted to be incurred by the Company and its
     Subsidiaries;

          (g) third party letters of credit to support the workmens compensation
     obligations of the Company and its Domestic Subsidiaries in an aggregate
     face amount not to exceed $2 million and only secured by Liens permitted
     pursuant to Section 8.03(m);

          (h) additional third party unsecured letters of credit in an aggregate
     face amount not to exceed $1 million; and

          (i) additional Indebtedness of the Company and its Subsidiaries not
     otherwise permitted hereunder not exceeding $1 million in aggregate
     principal amount at any time outstanding.

          8.05 Advances, Investments and Loans. The Company will not, and will
not permit any of its Subsidiaries to, lend money or credit or make advances to
any Person, or purchase or acquire any stock, obligations or securities of, or
any other interest in, or make any capital contribution to, any Person, or
purchase or own a futures contract or otherwise become liable for the purchase
or sale of currency or other commodities at a future date in the nature of a
futures contract, or hold

                                      -67-
<PAGE>
any cash, Cash Equivalents (collectively, "Investments"), except:

          (a) the Company and its Subsidiaries may invest in Cash and Cash
     Equivalents, and the Company's Foreign Subsidiaries may invest in Foreign
     Cash Equivalents;

          (b) the Company and its Subsidiaries may acquire and hold receivables
     owing to it, if created or acquired in the ordinary course of business and
     payable or dischargeable in accordance with customary trade terms
     (including the dating of receivables) of the Company or such Subsidiary;

          (c) the Company and its Subsidiaries may acquire and own investments
     (including debt obligations) received in connection with the bankruptcy or
     reorganization of suppliers and customers and in settlement of delinquent
     obligations of, and other disputes with, customers and suppliers arising in
     the ordinary course of business;

          (d) Interest Rate Protection Agreements entered into to protect the
     Company against fluctuations in interest rates in respect of the
     Obligations and other Hedging Agreements;

          (e) advances, loans and investments in existence on the Initial
     Borrowing Date and listed on Annex V shall be permitted, without giving
     effect to any additions thereto or replacements thereof (except those
     additions or replacements which are existing obligations as of the Initial
     Borrowing Date but only to the extent such further obligations are
     described on such Annex V);

          (f) deposits made in the ordinary course of business consistent with
     past practices to secure the performance of leases or other contractual
     arrangements shall be permitted;

          (g) the Company may make intercompany loans and advances to any of its
     Subsidiaries that are Guarantors and any Subsidiary of the Company may make
     intercompany loans and advances to the Company or any other Subsidiary of
     the Company that is a Guarantor (collectively, "Intercompany Loans");

                                      -68-
<PAGE>
          (h) loans and advances by the Company and its Subsidiaries to
     employees of the Company and its Subsidiaries for moving and travel
     expenses and other similar expenses or in connection with stock purchases
     in each case incurred in the ordinary course of business and consistent
     with past practices shall be permitted in an aggregate principal amount not
     to exceed $100,000 at any one time outstanding;

          (i) the Company and its Subsidiaries may acquire and hold promissory
     notes and/or equity securities issued by the purchaser or purchasers in
     connection with the sale of receivables to the extent permitted under
     Section 8.02(c); and

          (j) the Company may contribute cash to one or more of its Subsidiaries
     that are or become Guarantors formed after the Initial Borrowing Date in
     accordance with Section 8.14 so long as such Subsidiary remains a
     Guarantor.

          8.06 Dividends, etc. The Company will not, and will not permit any of
its Subsidiaries to, declare or pay any dividends (other than dividends payable
solely in common stock of the Company or any such Subsidiary, as the case may
be) or return any capital to, its stockholders or authorize or make any other
distribution, payment or delivery of property or cash to its stockholders as
such, or redeem, retire, purchase or otherwise acquire, directly or indirectly,
for any consideration, any shares of any class of its capital stock, now or
hereafter outstanding (or any warrants for or options or stock appreciation
rights (other than such rights as are granted only to employees as compensation
for their employment) in respect of any of such shares), or set aside any funds
for any of the foregoing purposes, and the Company will not permit any of its
Subsidiaries to purchase or otherwise acquire for consideration any shares of
any class of the capital stock of the Company or any Subsidiary of the Company
now or hereafter outstanding (or any options or warrants or such stock
appreciation rights issued by such Person with respect to its capital stock)
(all of the foregoing "Dividends", it being understood that the payments made in
accordance with the clauses contained in the proviso of Section 8.07 shall not
be deemed to be Dividends), except that any Subsidiary of the Company may pay
Dividends to the Company or any Wholly-Owned Subsidiary of the Company.

          8.07 Transactions with Affiliates. The Company will not, and will not
permit any of its Subsidiaries to, enter into

                                      -69-
<PAGE>
any transaction or series of transactions with any Affiliate other than in the
ordinary course of business and on terms and conditions substantially as
favorable to the Company or such Subsidiary as would be reasonably expected to
be obtainable by the Company or such Subsidiary at the time in a comparable
arm's-length transaction with a Person other than an Affiliate; provided that
the following shall in any event be permitted: (i) the Acquisition; and (ii)
transactions between or among the Company and its Subsidiaries to the extent
that such transactions are otherwise specifically permitted under this
Agreement, (iii) all transactions between or among the Credit Parties and (iv)
all immaterial transactions with Affiliates.

          8.08 Working Capital; Minimum Net Worth. The Company shall not permit
its Working Capital (excluding for the purposes of this Section 8.08 the current
portion of Indebtedness under this Agreement) on the last day of any fiscal
quarter to be less than $5 million.

          The Company will not permit Consolidated Net Worth at any time to be
less than the Minimum Net Worth.

          8.09 Asset Coverage Ratio. The Company shall at all times maintain an
Asset Coverage Ratio greater than 1.0:1.0.

          8.10 Interest Coverage Ratio. The Company will not permit the Interest
Coverage Ratio for the three month periods ended March 31, 1997 and June 30,
1997 to be less than 2.75:1.0 and thereafter to be less than 3.0:1.0.

          8.11 Leverage Ratio. The Company will not permit the Leverage Ratio at
any time to be greater than .50.

          8.12 Limitation on Voluntary Payments and Modifications of
Indebtedness; Modifications of Certificate of Incorporation, By-Laws and Certain
Other Agreements; Issuances of Capital Stock; etc. The Company will not, and
will not permit any of its Subsidiaries to:

          (i) make (or give any notice in respect of) any voluntary or optional
     payment or prepayment on or redemption or acquisition for value of
     (including, without limitation, by way of depositing with the trustee with
     respect thereto or any other Person money or securities before due for the
     purpose of paying when due) any Indebtedness, including any Existing
     Indebtedness;

                                      -70-
<PAGE>
         (ii) amend or modify in any material respect or in any manner adverse
     to the Company or the Lenders, or permit such an amendment or modification
     of, any provision of the Existing Indebtedness;

        (iii) amend, modify or change in any way adverse to the interests of the
     Lenders, its Certificate of Incorporation (including, without limitation,
     by the filing or modification of any certificate of designation) or ByLaws;
     and

          (iv) issue any class of capital stock other than com- mon stock.

          8.13 Limitation on Certain Restrictions on Subsidiaries. The Company
will not, and will not permit any of its Subsidiaries to, directly or
indirectly, create or otherwise cause or suffer to exist or become effective any
encumbrance or restriction on the ability of any such Subsidiary to (a) pay
dividends or make any other distributions on its capital stock or any other
interest or participation in its profits owned by the Company or any Subsidiary
of the Company, or pay any Indebtedness owed to the Company or a Subsidiary of
the Company, (b) make loans or advances to the Company or any of the Company's
Subsidiaries or (c) transfer any of its properties or assets to the Company or
any of its Subsidiaries, except for such encumbrances or restrictions existing
under or by reason of (i) applicable law, (ii) the Credit Documents, (iii)
customary provisions restricting subletting or assignment of any lease governing
a leasehold interest of the Company or a Subsidiary of the Company, (iv)
customary provisions restricting assignment of any licensing agreement entered
into by the Company or a Subsidiary of the Company in the ordinary course of
business, (vi) customary provisions restricting the transfer of assets pursuant
to Liens permitted under Section 8.03(j), (k), (l), (m) or (n) and (vii)
restrictions or encumbrances pursuant to Indebtedness of a Subsidiary acquired
pursuant to a Permitted Acquisition (or Indebtedness assumed at the time of a
Permitted Acquisition) or on an asset securing such Indebtedness, provided that
such Indebtedness was not incurred in connection with, or in anticipation or
contemplation of, such Permitted Acquisition, and provided, further, that such
restrictions or encumbrances apply solely to such Subsidiary or asset so
acquired.

          8.14 Limitation on the Creation of Subsidiaries. Notwithstanding
anything to the contrary contained in this

                                      -71-
<PAGE>
Agreement, the Company will not, and will not permit any of its Subsidiaries to,
establish, create or acquire after the Initial Borrowing Date any Subsidiary;
provided that the Company and its Wholly-Owned Subsidiaries shall be permitted
to establish or create Subsidiaries as a result of investments made pursuant to
Section 8.05(j) so long as, in each case, (i) at least 15 days' prior written
notice thereof is given to the Agent (or such shorter period of time as is
acceptable to the Agent), (ii) unless otherwise consented to by the Agent
because such Subsidiary is a Foreign Subsidiary, the capital stock of such new
Subsidiary is promptly pledged pursuant to, and to the extent required by, this
Agreement and the Pledge Agreement and the certificates, if any, representing
such stock, together with stock powers duly executed in blank, are delivered to
the Collateral Agent, (iii) unless otherwise consented to by the Agent because
such Subsidiary is a Foreign Subsidiary, such new Subsidiary promptly executes a
counterpart of the Guaranty, the Pledge Agreement and the Security Agreement,
and (iv) to the extent requested by the Agent, the Co-Agent or the Required
Lenders, takes all actions required pursuant to Section 7.11, provided that no
such action will be required by any new Subsidiary (that is not a Wholly-Owned
Subsidiary) to the extent such new Subsidiary is a party to a preexisting
agreement which prohibits such new Subsidiary from executing a Guaranty;
provided, further, such preexisting agreement was not entered into for the
purpose of avoiding the requirements of Section 8.14 and the restrictions
contained therein are no more adverse to the Company and its Subsidiaries than
to the other equity owners in such new Subsidiary. In addition, each new
Subsidiary that is required to execute any Credit Document shall execute and
deliver, or cause to be executed and delivered, all other relevant documentation
of the type described in Section 5 as such new Subsidiary would have had to
deliver if such new Subsidiary were a Credit Party on the Initial Borrowing
Date.

          SECTION 9. Events of Default. Upon the occurrence of any of the
following specified events (each an "Event of Default"):

          9.01 Payments. The Borrowers shall (i) default in the payment when due
of any principal of the Loans or (ii) default, and such default shall continue
for two or more Business Days, in the payment when due of any Unpaid Drawing,
any interest on the Loans or any Fees or any other amounts owing hereunder or
under any other Credit Document;

                                      -72-
<PAGE>
          9.02 Representations, etc. Any representation, warranty or statement
made by any Credit Party in any Credit Document or in any statement or
certificate delivered pursuant thereto shall prove to be untrue in any material
respect on the date as of which made or deemed made; or

          9.03 Covenants. Any Credit Party shall (a) default in the due
performance or observance by it of any term, covenant or agreement contained in
Section 8, or (b) default in the due performance or observance by it of any
term, covenant or agreement (other than those referred to in Section 9.01, 9.02
or clause (a) of this Section 9.03) contained in this Agreement and such default
shall continue unremedied for a period of at least 30 days after notice to the
defaulting party by the Agent, Co-Agent or the Required Lenders, provided that
if any such default covered by this clause (b) (i) is not capable of being
remedied within such 30-day period, (ii) is capable of being remedied within an
additional 30-day period and (iii) the Credit Party is diligently pursuing such
remedy during the periods contemplated by (i) and (ii) and has advised the Agent
as to the remedy thereof, the first 30-day period referred to in this clause (b)
shall be extended for an additional 30-day period but only so long as (x) the
Credit Party continues to diligently pursue such remedy and (y) such default
remains capable of being remedied within such period; or

          9.04 Default Under Other Agreements. (a) The Company or any of its
Subsidiaries shall (i) default in any payment on or with respect to any
Indebtedness (other than the Obligations) beyond the period of grace, if any,
provided in the instrument or agreement under which such Indebtedness was
created or (ii) default in the observance or performance of any agreement or
condition relating to any such Indebtedness or contained in any instrument or
agreement evidencing, securing or relating thereto, or any other event shall
occur or condition exist, the effect of which default or other event or
condition is to cause, or to permit the holder or holders of such Indebtedness
(or a trustee or agent on behalf of such holder or holders) to cause, any such
Indebtedness to become due prior to its stated maturity; or (b) any Indebtedness
(other than the Obligations) of the Company or any of its Subsidiaries shall be
declared to be due and payable, or shall be required to be pre-paid other than
by a regularly scheduled required prepayment or as a mandatory prepayment
(unless such required prepayment or mandatory prepayment results from a default
thereunder or an event of the type that constitutes an Event of Default), prior
to the stated maturity thereof; provided that it shall not

                             -73-
<PAGE>
constitute an Event of Default pursuant to clause (a) or (b) of this Section
9.04 unless the principal amount of any one issue of such Indebtedness, or the
aggregate amount of all such Indebtedness referred to in clauses (a) and (b)
above, exceeds $350,000 at any one time; or

          9.05 Bankruptcy, etc. The Company or any of its Subsidiaries shall
commence a voluntary case concerning itself under Title 11 of the United States
Code entitled "Bankruptcy," as now or hereafter in effect, or any successor
thereto (the "Bankruptcy Code"); or an involuntary case is commenced against the
Company or any of its Subsidiaries and the petition is not controverted within
30 days, or is not dismissed within 60 days, after commencement of the case; or
a custodian (as defined in the Bankruptcy Code) is appointed for, or takes
charge of, all or substantially all of the property of the Company or any of its
Subsidiaries; or the Company or any of its Subsidiaries commences any other
proceeding under any reorganization, arrangement, adjustment of debt, relief of
debtors, dissolution, insolvency or liquidation or similar law of any
jurisdiction whether now or hereafter in effect relating to the Company or any
of its Subsidiaries; or there is commenced against the Company or any of its
Subsidiaries any such proceeding which remains undismissed for a period of 60
days; or the Company or any of its Subsidiaries is adjudicated insolvent or
bankrupt; or any order of relief or other order approving any such case or
proceeding is entered; or the Company or any of its Subsidiaries suffers any
appointment of any custodian or the like for it or any substantial part of its
property to continue undischarged or unstayed for a period of 60 days; or the
Company or any of its Subsidiaries makes a general assignment for the benefit of
creditors; or any corporate action is taken by the Company or any of its
Subsidiaries for the purpose of effecting any of the foregoing; or

          9.06 ERISA. (a) Any Plan shall fail to satisfy the minimum funding
standard required for any plan year or part thereof or a waiver of such standard
or extension of any amortization period is sought or granted under Section 412
of the Code, any Plan shall have had or is likely to have a trustee appointed to
administer such Plan, any Plan is, shall have been or is likely to be terminated
or the subject of termination proceedings under ERISA, any Plan shall have an
Unfunded Current Liability, a contribution required to be made to a Plan or a
Foreign Pension Plan has not been timely made, the Company or any Subsidiary of
the Company or any ERISA Affiliate has incurred or is likely to incur a
liability to or on account of

                                      -74-
<PAGE>
a Plan under Section 409, 502(i), 502(l), 515, 4062, 4063, 4064, 4069, 4201,
4204 or 4212 of ERISA or Section 401(a)(2), 4971, 4975 or 4980 of the Code, or
the Company or any Subsidiary of the Company has incurred or is likely to incur
liabilities pursuant to one or more employee welfare benefit plans (as defined
in Section 3(1) of ERISA) which provide benefits to retired employees and other
former employees (other than as required by Section 601 of ERISA) or employee
pension benefit plans (as defined in Section 3(2) of ERISA) or Foreign Pension
Plans; (b) there shall result from any such event or events the imposition of a
lien, the granting of a security interest, or a liability or a material risk of
imposition of a lien, granting of a security interest or incurring a liability;
and (c) which lien, security interest or liability which arises from such event
or events is reasonably likely to have a Material Adverse Effect; or

          9.07 Security Documents. (a) Any Security Document shall cease to be
in full force and effect, or shall cease to give the Collateral Agent the Liens,
rights, powers and privileges purported to be created thereby in favor of the
Collateral Agent with respect to any portion of the Collateral which is not de
minimis, or (b) any Credit Party shall default in the due performance or
observance of any term, covenant or agreement on its part to be performed or
observed pursuant to any such Security Document and such default shall continue
beyond any cure or grace period specifically applicable thereto pursuant to the
terms of any such Security Document; or

          9.08 Guarantees. The Guarantees or any provision thereof shall cease
to be in full force and effect, or any Guarantor or any Person acting by or on
behalf of such Guarantor shall deny or disaffirm such Guarantor's obligations
under any Guaranty or any Guarantor shall default in the due performance or
observance of any term, covenant or agreement on its part to be performed or
observed pursuant to any Guaranty; or

          9.09 Judgments. One or more judgments or decrees shall be entered
against the Company or any of its Subsidiaries involving a liability (to the
extent not paid or not fully covered (which coverage has not been denied) by
insurance) in excess of $350,000 for all such judgments and decrees and all such
judgments or decrees shall not have been vacated, discharged or stayed or bonded
pending appeal within 60 days from the entry thereof; or

                                      -75-
<PAGE>
          9.10 Ownership. A Change of Control Event shall have occurred; then,
and in any such event, and at any time thereafter, if any Event of Default shall
then be continuing, the Agent may (and shall, upon the written request of the
Required Lenders), by written notice to the Borrowers, take any or all of the
following actions, without prejudice to the rights of the Agent or Co-Agent or
any Lender to enforce its claims against any Guarantor or the Borrowers, except
as otherwise specifically provided for in this Agreement (provided that if an
Event of Default specified in Section 9.05 shall occur with respect to the
Borrowers the result which would occur upon the giving of written notice by the
Agent as specified in clauses (i) and (ii) below shall occur automatically
without the giving of any such notice): (i) declare the Total Revolving Loan
Commitment terminated, whereupon the Revolving Loan Commitment of each Lender
shall forthwith terminate immediately and any Commitment Fees shall forthwith
become due and payable without any other notice of any kind; (ii) declare the
principal of and any accrued interest in respect of all Loans and all
Obligations owing hereunder (including Unpaid Drawings) to be, whereupon the
same shall become, forthwith due and payable without presentment, demand,
protest or other notice of any kind, all of which are hereby waived by the
Borrowers; (iii) enforce, as Collateral Agent (or direct the Collateral Agent to
enforce), any or all of the Liens and security interests created pursuant to the
Security Documents; (iv) terminate any Letter of Credit which may be terminated
in accordance with its terms; and (v) direct the Borrowers to pay (and the
Borrowers hereby agree upon receipt of such notice, or upon the occurrence of
any Event of Default specified in Section 9.05, to pay) to the Collateral Agent
at the Payment Office such additional amounts of cash, to be held as security
for the Borrowers' reimbursement obligations in respect of Letters of Credit
then outstanding, equal to the aggregate Stated Amount of all Letters of Credit
then outstanding.

          SECTION 10. Definitions. As used herein, the following terms shall
have the meanings herein specified unless the context otherwise requires.
Defined terms in this Agreement shall include in the singular number the plural
and in the plural the singular:

          "Acquisition" shall have the meaning provided in the Recitals hereto.

                                      -76-
<PAGE>
          "Acquisition Agreement" shall mean the Acquisition Agreement, dated as
of November 12, 1996, between DI and Diamond M Onshore, Inc., including the
Exhibits and Schedules thereto.

          "Affiliate" shall mean, with respect to any Person, any other Person
directly or indirectly controlling (including but not limited to all directors
and executive officers of such Person), controlled by, or under direct or
indirect common control with such Person. A Person shall be deemed to control a
corporation if such Person possesses, directly or indirectly, the power (i) to
vote 10% or more of the securities having ordinary voting power for the election
of directors of such corporation or (ii) to direct or cause the direction of the
management and policies of such corporation, whether through the ownership of
voting securities, by contract or otherwise.

          "Agent" shall mean BTCo and shall include any successor appointed
pursuant to Section 11.10.

          "Agreement" shall mean this Credit Agreement, as the same may be from
time to time modified, amended and/or supplemented.

          "Applicable Base Rate Margin" shall mean a percentage per annum equal
to 2.00%.

          "Applicable Eurodollar Margin" shall mean a percent- age per annum
equal to 3.00%.

          "Appraisal of Fair Market Value" shall mean a report establishing Fair
Market Value of an asset or property. The values in such appraisal shall be
determined by using the market data approach. The market data approach is that
approach to value where recent sales and/or offering prices of similar assets or
property are analyzed to arrive at an indication of the most probable selling
price for the asset or property being appraised.

          "Approved Appraiser" shall mean Superior Appraisals and Hadco
International, Inc. or any other appraiser acceptable to the Agent.

          "Asset Coverage Ratio" shall mean the ratio of (i) Eligible Cash plus
75% of Eligible Accounts Receivable plus 40% of Inventory plus the lesser of (x)
40% of the Fair Market Value (as determined in the most recent Appraisal
delivered

                                      -77-
<PAGE>
pursuant to Section 7.11(c)) of Domestic Drilling Rigs and Related Equipment and
(y) 50% of the Orderly Liquidation Value (as determined in the most recent
Appraisal delivered pursuant to Section 7.11(c)) of Domestic Drilling Rigs and
Related Equipment to (ii) the Total Commitment.

          "Asset Sale" shall mean any sale, transfer or other disposition by the
Company or any of its Subsidiaries to any Person of any asset (including,
without limitation, any capital stock or other securities of another Person, but
excluding the sale by such Person of its own capital stock) of the Company or
such Subsidiary other than (i) sales, transfers or other dispositions of
inventory made in the ordinary course of business, (ii) sales of assets pursuant
to, Sections 8.02(e), (f), (g), (h) and (i) and (iii) sales of those assets
listed on Annex X hereto.

          "Assignment and Assumption Agreement" shall mean the Assignment and
Assumption Agreement substantially in the form of Exhibit K (appropriately
completed).

          "Authorized Officer" shall mean any senior officer of a Borrower
designated as such in writing to the Agent and Co-Agent by the Borrowers to the
extent reasonably acceptable to the Agent and Co-Agent.

          "Bankruptcy Code" shall have the meaning provided in Section 9.05.

          "Base Rate" at any time shall mean the highest of (x) the Prime
Lending Rate and (y) the rate which is 1/2 of 1% in excess of the Federal Funds
Rate.

          "Base Rate Loan" shall mean each Loan bearing interest at the rates
provided in Section 1.08(a).

          "Borrower" and "Borrowers" shall have the meanings provided in the
first paragraph of this Agreement.

          "Borrowing" shall mean and include the borrowing of one Type of
Revolving Loan from all of the Lenders on a given date (or resulting from
conversions on a given date), having in the case of Eurodollar Loans the same
Interest Period; provided that Base Rate Loans incurred pursuant to Section
1.10(b) shall be considered part of any related Borrowing of Eurodollar Loans.

                                      -78-
<PAGE>
          "BTCo" shall mean Bankers Trust Company, in its individual capacity,
and any successor corporation thereto by merger, consolidation or otherwise.

          "Business Day" shall mean (i) for all purposes other than as covered
by clause (ii) below, any day excluding Saturday, Sunday and any day which shall
be in the City of New York a legal holiday or a day on which banking
institutions are authorized by law or other governmental actions to close and
(ii) with respect to all notices and determinations in connection with, and
payments of principal and interest on, Eurodollar Loans, any day which is a
Business Day described in clause (i) and which is also a day for trading by and
between banks in U.S. dollar deposits in the interbank Eurodollar market.

          "Capital Expenditures" shall mean, with respect to any Person, all
expenditures by such Person which should be added to the fixed assets account on
the consolidated balance sheet of such Person in accordance with GAAP, including
all such expenditures with respect to plant, property or equipment (including,
without limitation, expenditures for maintenance and repairs which should be
capitalized in accordance with GAAP).

          "Capital Lease," as applied to any Person, shall mean any lease of any
property (whether real, personal or mixed) by that Person as lessee which, in
conformity with GAAP, should be accounted for as a capital lease on the balance
sheet of that Person.

          "Capitalized Lease Obligations" shall mean all obligations under
Capital Leases of the Company or any of its Subsidiaries in each case taken at
the amount thereof that should be accounted for as liabilities in accordance
with GAAP.

          "Cash" shall mean U.S. dollars.

          "Cash Equivalents" shall mean (i) securities issued or directly and
fully guaranteed or insured by the United States of America or any agency or
instrumentality thereof (provided that the full faith and credit of the United
States of America is pledged in support thereof) having maturities of not more
than twelve months from the date of acquisition, (ii) U.S. dollar denominated
time deposits, certificates of deposit and banker acceptances of (x) any Lender
or (y) any bank whose short-term commercial paper rating from S&P is at least
A-1 or the equivalent thereof or from Moody's is at least

                                      -79-
<PAGE>
P-1 or the equivalent thereof (any such bank or Lender, an "Approved Lender"),
in each case with maturities of not more than twelve months from the date of
acquisition, (iii) commercial paper issued by any Approved Lender or by the
parent company of any Approved Lender and commercial paper issued by, or
guaranteed by, any industrial or financial company with a short-term commercial
paper rating of at least A-1 or the equivalent thereof by S&P or at least P-1 or
the equivalent thereof by Moody's, as the case may be, and in each case maturing
within twelve months after the date of acquisition, (iv) marketable direct
obligations issued by any state of the United States of America or any political
subdivision of any such state or any public instrumentality thereof maturing
within twelve months from the date of acquisition thereof and, at the time of
acquisition having one of the two highest ratings obtainable from either S&P or
Moody's, (v) any repurchase agreement entered into with any Approved Lender
which is secured by any obligation of the type described in any of clauses (i)
through (iii) and (vi) investments in money market funds substantially all the
assets of which are comprised of securities of the types described in clauses
(i) through (iv) above.

          "Cash Proceeds" shall mean, with respect to any Asset Sale, the
aggregate cash payments (including any cash received by way of deferred payment
pursuant to a note receivable issued in connection with such Asset Sale, other
than the portion of such deferred payment constituting interest, but only as and
when so received) received by the Company and/or any of its Subsidiaries from
such Asset Sale.

          "Change of Control Event" shall mean (a) the Company shall cease to
own directly 100% on a fully diluted basis of the economic and voting interest
in the capital stock of Drillers, Inc. and DI International, Inc. or (b) any
Person or "group" (within the meaning of Rules 13d-3 and 13d-5 under the
Securities Exchange Act of 1934, as in effect on the Effective Date), shall (A)
have acquired beneficial ownership of 30% or more on a fully diluted basis of
the voting and/or economic interest in the Company's capital stock or (B)
obtained the power (whether or not exercised) to elect a majority of the
Company's directors or (c) the Board of Directors of the Company shall cease to
consist of a majority of Continuing Directors or (d) Norex Drilling Ltd.,
Somerset Drilling Associates, L.L.C., and Somerset Capital Partners shall cease
to own or control at least 30% on a fully diluted basis of the voting interest
in the capital stock of the Company.

                                      -80-
<PAGE>
          "Co-Agent" shall mean ING Capital and shall include any successor to
the Co-Agent appointed pursuant to Section 11.10.

          "Code" shall mean the Internal Revenue Code of 1986, as amended from
time to time, and the regulations promulgated and ruling issued thereunder.
Section references to the Code are to the Code, as in effect at the date of this
Agreement and any subsequent provisions of the Code amendatory thereof,
supplemental thereto or substituted therefor.

          "Collateral" shall mean all of the Pledged Collateral and Pledged
Securities.

          "Collateral Agent" shall mean BTCo acting as collateral agent for the
Lenders.

          "Commitment Fee" shall have the meaning provided in Section 3.01(a).

          "Company" shall have the meaning provided in the first paragraph of
this Agreement.

          "Company Common Stock" shall have the meaning provided in Section
6.14.

          "Consolidated Current Assets" shall mean the current assets of the
Company and its Subsidiaries determined on a consolidated basis in accordance
with GAAP.

          "Consolidated Current Liabilities" shall mean the current liabilities
of the Company and its Subsidiaries determined on a consolidated basis in
accordance with GAAP, but excluding the current portion of and the accrued but
unpaid interest on any Indebtedness under this Agreement.

          "Consolidated Debt" shall mean, at any time, all Indebtedness of the
Company and its Subsidiaries determined on a consolidated basis; provided that
for purposes of this definition, the amount of Indebtedness in respect of
Interest Rate Protection Agreements and Other Hedging Agreements shall be at any
time equal to the unrealized net loss position, if any, of the Company and/or
its Subsidiaries thereunder on a marked to market basis determined no more than
one month prior to such time.

                                      -81-
<PAGE>
          "Consolidated EBIT" shall mean, for any period, Consolidated Net
Income, before total interest expense (inclusive of amortization of deferred
financing fees, premiums on Interest Rate Protection Agreements and any original
issue discount) of the Company and its Subsidiaries determined on a consolidated
basis and provisions for taxes based on income, whether paid or deferred.

          "Consolidated EBITDA" shall mean, for any period, Consolidated EBIT,
adjusted by adding thereto the amount of all depreciation expense and
amortization expense plus non-cash compensation expenses relating to restricted
stock and stockoption grants, in each case, that were deducted in determining
Consolidated EBIT for such period, plus net earnings of any Person (other than a
consolidated Subsidiary that is a Guarantor) in which the Company or any
consolidated Subsidiary has an ownership interest to the extent such net
earnings shall have actually been received by the Company or such consolidated
Subsidiary in the form of cash distributions.

          "Consolidated Interest Expense" shall mean, for any period, total
interest expense (including that attributable to (A) any rent paid in respect of
Capital Leases which is or should be allocable to interest expense in accordance
with GAAP and (B) interest capitalized during the construction of any Capital
Expenditure) of the Company and its Subsidiaries determined on a consolidated
basis with respect to all outstanding Indebtedness of the Company and its
Subsidiaries, including, without limitation, all commissions, discounts and
other fees and charges owed with respect to letters of credit and bankers'
acceptance financing and net costs or benefits under Interest Rate Protection
Agreements, but excluding, however, amortization of any payments made to obtain
any Interest Rate Protection Agreement and Other Hedging Agreements and deferred
financing costs and any interest expense on deferred compensation arrangements
to the extent included in total interest expense.

          "Consolidated Net Income" shall mean, for any period, the net income
(or loss), after provisions for income taxes (other than with respect to net
income taxes attributable to items that are excluded from the calculation of
Consolidated Net Income in the period), of the Company and its Subsidiaries on a
consolidated basis for such period taken as a single accounting period in
conformity with GAAP but excluding in any event (a) any extraordinary gains (net
of extraordinary losses) but with giving effect to gains or losses from sales of
assets

                                      -82-
<PAGE>
sold in the ordinary course of business; (b) net earnings of any person (other
than a consolidated Subsidiary that is a Guarantor) in which the Company or any
consolidated Subsidiary has an ownership interest unless such net earnings shall
have actually been received by the Company or such consolidated Subsidiary in
the form of cash distributions; (c) any portion of the net earnings of any
consolidated Subsidiary which is unavailable for payment of dividends to the
Company or any other consolidated Subsidiary by reason of the provisions of any
agreement or applicable law or regulation (including, without limitation, those
agreements referred to in the exceptions set forth in Section 8.13); (d)
earnings resulting from any reappraisal, revaluation or write-up of assets; (e)
the income (or loss) of any Person accrued prior to the date it becomes a
Subsidiary of such Person or is merged into or consolidated with such Person or
any of its Subsidiaries or that Person's assets are acquired by such Person or
any of its Subsidiaries; (f) the aggregate net gain (or loss) during such period
arising from the revaluation (but not sale) of readily marketable securities;
(g) the income (or loss) from discontinued operations; and (h) non-cash charges
relating to the Acquisition and repayment of Indebtedness incurred under the
Existing Credit Agreement.

          "Consolidated Net Worth" shall mean, at any time, the net worth of the
Company and its Subsidiaries on a consolidated basis determined in accordance
with GAAP.

          "Contingent Obligations" shall mean as to any Person any obligation of
such Person guaranteeing or intended to guarantee any Indebtedness, leases,
dividends or other obligations ("primary obligations") of any other Person (the
"primary obligor") in any manner, whether directly or indirectly, including,
without limitation, any obligation of such Person, whether or not contingent,
(a) to purchase any such primary obligation or any property constituting direct
or indirect security therefor, (b) to advance or supply funds (x) for the
purchase or payment of any such primary obligation or (y) to maintain working
capital or equity capital of the primary obligor or otherwise to maintain the
net worth or solvency of the primary obligor, (c) to purchase property,
securities or services primarily for the purpose of assuring the owner of any
such primary obligations of the ability of the primary obligor to make payment
of such primary obligation or (d) otherwise to assure or hold harmless the owner
of such primary obligation against loss in respect thereof; provided, however,
that the term Contingent Obligation shall not include endorsements of
instruments for

                                      -83-
<PAGE>
deposit or collection or standard contractual indemnities entered into, in each
case in the ordinary course of business. The amount of any Contingent Obligation
shall be deemed to be an amount equal to the stated or determinable amount of
the primary obligation in respect of which such Contingent Obligation is made
or, if not stated or determinable, the maximum reasonably anticipated liability
in respect thereof (assuming such Person is required to perform thereunder) as
determined by such Person in good faith.

          "Continuing Directors" shall mean the directors of the Company on the
Initial Borrowing Date and each other director if such director's nomination for
the election to the Board of Directors of the Company is recommended by a
majority of the then Continuing Directors.

          "Credit Documents" shall mean this Agreement, each of the Notes and
each Security Document.

          "Credit Event" shall mean the making of a Loan or the issuance of a
Letter of Credit.

          "Credit Party" shall mean the Borrowers and each Guarantor.

          "Default" shall mean any event, act or condition which with notice or
lapse of time, or both, would constitute an Event of Default.

          "Defaulting Lender" shall mean any Lender with respect to which a
Lender Default is in effect.

          "Dividends" shall have the meaning provided in Section 8.07.

          "Documents" shall mean the Credit Documents.

          "Domestic Drilling Rigs and Related Equipment" shall mean Drilling
Rigs and Related Equipment owned by the Company or its Domestic Subsidiaries and
located in the 48 contiguous states.

          "Domestic Subsidiary" shall mean each Subsidiary of the Company
incorporated or organized in the United States or any State or territory
thereof.

                                      -84-
<PAGE>
          "Drilling Rig(s) and Related Equipment" shall mean all drilling and
workover rigs owned by the Company and its Subsidiaries, and all pumps, drilling
equipment, machinery, equipment, supplies, parts and other goods of any
description whatsoever installed on or affixed to or to be used in connection
with any such rig.

          "Effective Date" shall have the meaning provided in Section 12.10.

          "Eligible Accounts Receivable" shall mean all accounts receivable of
the Company and its Domestic Subsidiaries with respect to account debtors that
are located in the 48 contiguous states; accounts that are no more than 90 days
past the original invoice date; and accounts that have not otherwise been
declared ineligible by the Agent and Co-Agent.

          "Eligible Cash" shall mean all Cash and Cash Equivalents held by the
Company and its Domestic Subsidiaries as of the last month in excess of $10
million.

          "Eligible Transferee" shall mean a commercial bank, financial
institution or other institutional "accredited investor" (as defined in
Regulation D of the Securities Act).

          "Environmental Claims" shall mean any and all administrative,
regulatory or judicial actions, suits, demands, demand letters, claims, liens,
notices of non-compliance, deficiency, liability or violation, investigations or
proceedings relating in any way to any violation or liability (or alleged
violation or liability) by the Company or any of its Subsidiaries under any
Environmental Law (hereafter "Claims") or any permit, license or other
authorization issued to the Company or any of its Subsidiaries under any such
law, including, without limitation, (a) any and all Claims by governmental or
regulatory authorities for enforcement, cleanup, removal, remedial, corrective,
response or other actions or damages pursuant to any Environmental Law, and (b)
any and all Claims by any third party seeking damages, contribution,
indemnification, cost recovery, compensation or injunctive relief resulting from
Hazardous Materials or arising from alleged injury or threat of injury to
health, safety or the environment.

          "Environmental Law" shall mean any foreign, federal, state or local
policy, statute, law, rule, regulation, ordinance, code or rule of common law
now or hereafter in effect and in each case as amended, and any judicial or
administrative

                                      -85-
<PAGE>
interpretation thereof, including any judicial or administrative order, consent,
decree or judgment (for purposes of this definition (collectively, "Laws")),
relating to the environment or Hazardous Materials, or health and safety to the
extent such health and safety issues arise under the Occupational Safety and
Health Act of 1970, as amended, or any such similar Laws.

          "ERISA" shall mean the Employee Retirement Income Security Act of
1974, as amended from time to time, and the regulations promulgated and the
rulings issued thereunder. Section references to ERISA are to ERISA as in effect
at the date of this Agreement and any subsequent provisions of ERISA amendatory
thereof, supplemental thereto or substituted therefor.

          "ERISA Affiliate" shall mean each person (as defined in Section 3(9)
of ERISA) which together with the Company or any Subsidiary of the Company would
be deemed to be a "single employer" within the meaning of Section 414(b) or (c)
of the Code or (to the extent required by operation of Title IV of ERISA or
Section 412 of the Code or Section 302 of ERISA) Section 414(m) or (o) of the
Code.

          "Eurodollar Loans" shall mean each Loan bearing interest at the rates
provided in Section 1.08(b).

          "Eurodollar Rate" shall mean with respect to each Interest Period for
a Eurodollar Loan, (i) the arithmetic average (rounded to the nearest 1/16 of
1%) of the offered quotation to first-class banks in the interbank Eurodollar
market by BTCo for U.S. dollar deposits of amounts in same day funds generally
comparable to the aggregate principal amount of the Eurodollar Loan for which an
interest rate is then being determined with maturities comparable to the
Interest Period to be applicable to such Eurodollar Loan, determined as of 10:00
A.M. (New York time) on the date which is two Business Days prior to the
commencement of such Interest Period divided (and rounded upward to the next
whole multiple of 1/16 of 1%) by (ii) a percentage equal to 100% minus the then
stated maximum rate of all reserve requirements (including, without limitation,
any marginal, emergency, supplemental, special or other reserves) applicable to
any member bank of the Federal Reserve System in respect of Eurocurrency
liabilities as defined in Regulation D (or any successor category of liabilities
under Regulation D).

          "Event of Default" shall have the meaning provided in Section 9.

                                      -86-
<PAGE>
          "Existing Credit Agreement" means the credit facility provided to DI
and certain Subsidiaries pursuant to the Loan Agreement dated as of December 12,
1994 among DI and NordlandsBanken AS, as amended.

          "Existing Indebtedness" shall have the meaning provided in Section 
6.22.

          "Existing Indebtedness Agreements" shall have the meaning provided in 
Section 5.13.

          "Existing Letters of Credit" shall have the meaning provided in 
Section 6.22.

          "Facing Fee" shall have the meaning provided in Section 3.01(c).

          "Fair Market Value" shall mean with respect to any asset the amount of
Net Proceeds which could be expected upon a sale by a willing and informed
seller to a willing and informed buyer, both exercising prudent judgment and not
acting with undue haste.

          "Federal Funds Rate" shall mean, for any period, a fluctuating
interest rate equal for each day during such period to the weighted average of
the rates on overnight Federal Funds transactions with members of the Federal
Reserve System arranged by Federal Funds brokers, as published for such day (or,
if such day is not a Business Day, for the next preceding Business Day) by the
Federal Reserve Lender of New York, or, if such rate is not so published for any
day which is a Business Day, the average of the quotations for such day on such
transactions received by the Agent and Co-Agent from three Federal Funds brokers
of recognized standing selected by the Agent and Co-Agent.

          "Fees" shall mean all amounts payable pursuant to, or referred to in, 
Section 3.01.

          "Final Maturity Date" shall mean December 31, 1999.

          "Foreign Cash Equivalents" shall mean dollar denominated certificates
of deposit or bankers acceptances of any bank organized under the laws of the
jurisdiction of incorporation of a Foreign Subsidiary, provided that the
short-term commercial paper rating of such bank from S&P is at least A-1 or the
equivalent thereof or from Moody's is at least P-1 or the

                                      -87-
<PAGE>
equivalent thereof, in each case with maturities of not more than twelve months
from the date of acquisition.

          "Foreign Subsidiary" shall mean each Subsidiary of the Company other
than a Domestic Subsidiary.

          "GAAP" shall mean generally accepted accounting principles in the
United States of America as in effect from time to time; it being understood and
agreed that determinations in accordance with GAAP for purposes of Section 8 and
the definition of Interest Reduction Discount, including defined terms as used
therein, are subject (to the extent provided therein) to Section 12.07(a).

          "Guaranteed Creditors" shall mean and include each of the Agent, the
Co-Agent, the Collateral Agent, the Lenders and the Letter of Credit Issuer.

          "Guaranteed Obligations" shall mean the full and prompt payment when
due (whether at the stated maturity, by acceleration or otherwise) of the
principal and interest on each Note issued by the Borrowers to each Lender, and
Loans made, under this Agreement and all reimbursement obligations and Unpaid
Drawings with respect to Letters of Credit, together with all the other
obligations (including obligations which, but for the automatic stay under
Section 362(a) of the Bankruptcy Code, would become due) and liabilities
(including, without limitation, indemnities, fees and interest thereon) of the
Borrowers or any Guarantor to such Lender, the Agent, the Co-Agent and the
Collateral Agent now existing or hereafter incurred under, arising out of or in
connection with any Credit Document and the due performance and compliance with
all the terms, conditions and agreements contained in each of the Credit
Documents by the Borrowers.

          "Guarantees" shall mean the Subsidiary Guarantees.

          "Guarantors" shall mean the Subsidiary Guarantors.

          "Hazardous Materials" shall mean (a) any petrochemical or petroleum
products or wastes (including crude oil or any fraction thereof), radioactive
materials, asbestos in any form that is or could become friable, urea
formaldehyde foam insulation, transformers or other equipment that contain
dielectric fluid containing levels of polychlorinated biphenyls, and radon gas;
and (b) any chemicals, materials or substances defined as or included in the
definition of "hazardous substances,"

                                      -88-
<PAGE>
"hazardous wastes," "hazardous materials," "restricted hazardous materials,"
"extremely hazardous wastes," "restrictive hazardous wastes," "toxic
substances," "toxic pollutants," "contaminants" or "pollutants," or words of
similar meaning and regulatory effect under any Environmental Law.

          "Indebtedness" of any Person shall mean, without duplication, (i) all
indebtedness of such Person for borrowed money, (ii) the deferred purchase price
of assets or services payable to the sellers thereof or any of such seller's
assignees which in accordance with GAAP would be shown on the liability side of
the balance sheet of such Person but excluding deferred rent as determined in
accordance with GAAP, (iii) the face amount of all letters of credit issued for
the account of such Person and, without duplication, all drafts drawn
thereunder, (iv) all Indebtedness of a second Person secured by any Lien on any
property owned by such first Person, whether or not such Indebtedness has been
assumed; provided, however, that in the event that the liability of such first
Person is non-recourse to such Person and is recourse only to specified assets
of such Person, the amount of Indebtedness attributed thereto shall not exceed
the greater of the market value of such assets or the book value of such assets,
(v) all Capitalized Lease Obligations of such Person, (vi) all obligations of
such Person to pay a specified purchase price for goods or services whether or
not delivered or accepted, i.e., take-or-pay and similar obligations, (vii) all
obligations under Interest Rate Protection Agreements and Other Hedging
Agreements and (viii) all Contingent Obligations of such Person; provided that
Indebtedness shall not include trade payables and accrued expenses, in each case
arising and payable in the ordinary course of business and consistent with past
practice and in no event 120 days past the invoice date (so long as so paid in
the ordinary course of business and consistent with past practice).

          "ING Capital" shall mean ING (US) Capital Corporation, in its
individual capacity, and any successor corporation thereto by merger,
consolidation or otherwise.

          "Initial Borrowing Date" shall mean the date upon which the initial
Borrowing of Loans occurs.

          "Intercompany Loan" shall have the meaning provided in Section
8.05(g).

          "Interest Coverage Ratio" shall mean, for the three- month period most
recently ended for which consolidated

                                      -89-
<PAGE>
financial information is available, commencing with March 31, 1997, the ratio of
Consolidated EBITDA to Consolidated Interest Expense for such period; provided,
however, that for purposes of calculating this ratio, interest expense on the
Norex Loan shall not constitute Consolidated Interest Expense.

          "Interest Period," with respect to any Eurodollar Loan, shall mean the
interest period applicable thereto, as determined pursuant to Section 1.09.

          "Interest Rate Protection Agreement" shall mean any interest rate swap
agreement, interest rate cap agreement, interest rate collar agreement, interest
rate hedging agreement or other similar agreement or arrangement.

          "Inventory" shall mean inventory of the Company and its Domestic
Subsidiaries located in the 48 contiguous states determined in accordance with
GAAP.

          "L/C Supportable Indebtedness" shall mean (i) obligations of the
Company or its Subsidiaries incurred in the ordinary course of business with
respect to insurance obligations and workers' compensation, surety bonds and
other similar statutory obligations and (ii) such other obligations of the
Company or any of its Subsidiaries as are reasonably acceptable to the Agent and
the Letter of Credit Issuer and otherwise permitted to exist pursuant to the
terms of this Agreement.

          "Lease" shall mean any lease, sublease, franchise agreement, license,
occupancy or concession agreement.

          "Leasehold" of any Person shall mean all of the right, title and
interest of such Person as lessee or licensee in, to and under leases or
licenses of land, improvements and/or fixtures.

          "Lender" shall have the meaning provided in the first paragraph of
this Agreement.

          "Lender Default" shall mean (i) the refusal (which has not been
retracted) of a Lender to make available its portion of any Borrowing or to fund
its portion of any unreimbursed payment under Section 2.04(c) or (ii) a Lender
having notified the Agent and Co-Agent and/or the Company that it does not
intend to comply with the obligations under Section 1.01(a) or 2.04(c), in the
case of either clause (i) or (ii) above as a result of the appointment of a
receiver or

                                      -90-
<PAGE>
conservator with respect to such Lender at the direction or request of any
regulatory agency or authority.

          "Letter of Credit" shall have the meaning provided in
Section 2.01(a).

          "Letter of Credit Fees" shall have the meaning provided in Section
3.01(b).

          "Letter of Credit Issuer" shall mean BTCo.

          "Letter of Credit Outstandings" shall mean, at any time, the sum of,
without duplication, (i) the aggregate Stated Amount of all outstanding Letters
of Credit and (ii) the aggregate amount of all Unpaid Drawings in respect of all
Letters of Credit.

          "Letter of Credit Request" shall have the meaning provided in Section
2.02(a).

          "Letter of Credit Sublimit" shall mean $5,000,000.

          "Leverage Ratio" shall mean, at any time, the ratio of (x)
Consolidated Debt on such date to (y) Total Capitalization.

          "Lien" shall mean any mortgage, pledge, security interest,
encumbrance, lien or charge of any kind (including any agreement to give any of
the foregoing, any conditional sale or other title retention agreement, any
financing or similar statement or notice filed under the UCC or any similar
recording or notice statute, and any lease having substantially the same effect
as the foregoing).

          "Loan" shall mean each Revolving Loan.

          "Margin Stock" shall have the meaning provided in Regulation U.

          "Material Adverse Effect" shall mean a material adverse effect on the
business, properties, assets, liabilities, condition (financial or otherwise) or
prospects of the Company and its Subsidiaries, taken as a whole and after giving
effect to the Acquisition.

          "Minimum Borrowing Amount" shall mean for Revolving Loans, $1,000,000.

                                      -91-
<PAGE>
          "Minimum Net Worth" shall mean the sum of (x) $60 million, (y) 50% of
Consolidated Net Income, if positive, for the period from and including January
1, 1997 to and including the final day of the most recent period for which
consolidated financial information of the Company is available and (z) 50% of
the increase to stockholders' equity of the Company attributable to the issuance
of Company Common Stock.

          "Moody's" shall mean Moody's Investors Service, Inc.

          "Motor Vehicle Capitalized Lease Obligations" shall mean Capitalized
Lease Obligations with respect to Capital Leases of motor vehicles.

          "Multiemployer Plan" shall mean a Plan which is a multiemployer plan
(as defined in Section 4001(a)(3) of ERISA).

          "Net Cash Proceeds" shall mean, with respect to any Asset Sale, the
Cash Proceeds resulting therefrom net of (a) cash expenses of sale (including,
without limitation, brokerage fees, if any, transfer taxes and payment of
principal, premium and interest of Indebtedness other than the Loans required to
be repaid as a result of such Asset Sale), (b) all foreign, federal, state and
local taxes to the extent payable as a direct consequence of any such Asset Sale
and (c) deduction of reasonable amounts, determined in accordance with GAAP,
required to be provided by the Company or such Subsidiary as a reserve against
any liabilities retained by the Company or any Subsidiary of the Company
associated with such assets after such Asset Sale, including, without
limitation, any indemnification, pension and other post-employment benefit
liabilities, workers compensation liabilities, liabilities associated with
retiree benefits and liabilities relating to environmental matters, except and
until such reserves are reversed, in which case the amount of such reversal
shall constitute Net Cash Proceeds.

          "Non-Defaulting Lender" shall mean each Lender other than a Defaulting
Lender.

          "Norex Loan" shall mean the $4,000,000 term loan to the Company from
Norex Drilling Ltd., dated August 29, 1996.

          "Note" shall mean each Revolving Note.

          "Notice of Borrowing" shall have the meaning provided in Section 
1.03(a).

                                      -92-
<PAGE>
          "Notice of Conversion" shall have the meaning pro- vided in Section
1.06.

          "Notice Office" shall mean the office of BTCo located at 130 Liberty
Street, New York, New York 10006 or such other office as the BTCo may designate
to the Company and the Lenders from time to time.

          "Obligations" shall mean all amounts, direct or indirect, contingent
or absolute, of every type or description, and at any time existing, owing to
the Agent, the Co-Agent, the Collateral Agent or any Lender pursuant to the
terms of any Credit Document.

          "Orderly Liquidation Value" shall mean with respect to any asset the
amount of Net Proceeds which could be expected upon a sale by an informed seller
to a willing and informed buyer, but with the seller under a compulsion to sell
within a liquidation period not to exceed 120 days.

          "Other Hedging Agreements" shall mean any foreign exchange contracts,
currency swap agreements or other similar agreements or arrangements designed to
protect the Company and its Subsidiaries against fluctuations in currency
values.

          "Participant" shall have the meaning provided in Section 2.04(a)(i).

          "Payment Office" shall mean the office of BTCo located at 130 Liberty
Street, New York, New York 10006 or such other office as BTCo may designate to
the Company and the Lenders from time to time.

          "PBGC" shall mean the Pension Benefit Guaranty Corporation established
pursuant to Section 4002 of ERISA, or any successor thereto.

          "Percentage" shall mean, at any time for each Lender, the percentage
obtained by dividing such Lender's Revolving Loan Commitment at such time by the
Total Revolving Loan Commitment then in effect; provided that if the Total
Revolving Loan Commitment has been terminated, the Percentage of each Lender
shall be determined by dividing such Lender's Revolving Loan Commitment as in
effect immediately prior to such termination by the Total Revolving Loan
Commitment as in effect immediately prior to such termination.

                                      -93-
<PAGE>
          "Permitted Acquisition" shall have the meaning provided in Section 
8.02(j).

          "Permitted Liens" shall have the meaning provided in Section 8.03.

          "Person" shall mean any individual, partnership, joint venture, firm,
corporation, limited liability company or partnership, association, trust or
other enterprise or any government or political subdivision or any agency,
department or instrumentality thereof.

          "Plan" shall mean any multiemployer plan or singleemployer plan as
defined in Section 4001 of ERISA, which is maintained or contributed to by (or
to which there is an obligation to contribute of) the Company, any of its
Subsidiaries or any ERISA Affiliate and each such plan for the five calendar
year period immediately following the latest date on which the Company, any of
its Subsidiaries or any ERISA Affiliate maintained, contributed to or had an
obligation to contribute to such plan or any such plan as to which the Company,
any of its Subsidiaries or any ERISA Affiliate may have any liability, provided,
however, the term "Plan" shall not include any Foreign Pension Plan.

          "Pledge Agreement" shall have the meaning provided in Section 5.11(a)
and shall include any additional pledge agreement executed by the Company or any
of its Subsidiaries pursuant to Section 7.11.

          "Pledge Agreement Collateral" shall mean all "Collateral" as defined
in the Pledge Agreements.

          "Pledged Collateral" shall have the meaning assigned to such term in
the Security Agreements.

          "Pledged Securities" shall mean all the Pledged Securities as defined
in the Pledge Agreements.

          "Prime Lending Rate" shall mean the rate which BTCo announces from
time to time as its prime lending rate, the Prime Lending Rate to change when
and as such prime lending rate changes. The Prime Lending Rate is a reference
rate and does not necessarily represent the lowest or best rate actually charged
to any customer. BTCo may make commercial loans or other loans at rates of
interest at, above or below the Prime Lending Rate.

                                      -94-
<PAGE>
          "Prior Liens" shall mean Liens which, pursuant to the provisions of
any Security Document, are or may be superior to the Lien of such Security
Document.

          "Quarterly Payment Date" shall mean the last Business Day of each
fiscal quarter (including the fourth fiscal quarter) of the Company.

          "Real Property" of any Person shall mean all of the right, title and
interest of such Person in and to land, improvements and fixtures, including
Leaseholds.

          "Register" shall have the meaning provided in Section 7.12.

          "Regulation D" shall mean Regulation D of the Board of Governors of
the Federal Reserve System as from time to time in effect and any successor to
all or a portion thereof establishing reserve requirements.

          "Regulation G" shall mean Regulation G of the Board of Governors of
the Federal Reserve System as from time to time in effect and any successor to
all or any portion thereof.

          "Regulation T" shall mean Regulation T of the Board of Governors of
the Federal Reserve System as from time to time in effect and any successor to
all or any portion thereof.

          "Regulation U" shall mean Regulation U of the Board of Governors of
the Federal Reserve System as from time to time in effect and any successor to
all or any portion thereof.

          "Regulation X" shall mean Regulation X of the Board of Governors of
the Federal Reserve System as from time to time in effect and any successor to
all or any portion thereof.

          "Release" means disposing, discharging, injecting, spilling, pumping,
leaking, leaching, dumping, emitting, escaping, emptying, seeping, placing,
pouring and the like, into or upon any land or water or air, or otherwise
entering into the environment.

          "Replaced Lender" shall have the meaning provided in Section 1.13.

          "Reportable Event" shall mean an event described in Section 4043(c) of
ERISA with respect to a Plan as to which the

                                      -95-
<PAGE>
30-day notice requirement has not been waived by the PBGC by regulation.

          "Required Lenders" shall mean collectively (and not individually)
Non-Defaulting Lenders the sum of whose Revolving Loan Commitments (or, if after
the Total Revolving Loan Commitment has been terminated, outstanding Revolving
Loans and Letter of Credit Outstandings) constitute greater than 66-2/3% of the
Total Revolving Loan Commitment less the aggregate Revolving Loan Commitments of
Defaulting Lenders (or, if after the Total Revolving Loan Commitment has been
terminated, the total outstanding Revolving Loans of Non-Defaulting Lenders and
Letter of Credit Outstandings at such time).

          "Returns" shall have the meaning provided in Section 6.21.

          "Revolving Loan" shall have the meaning provided in Section 1.01(a).

          "Revolving Loan Commitment" shall mean, with respect to each Lender,
the amount set forth opposite such Lender's name in Annex I directly below the
column entitled "Revolving Loan Commitment," as the same may be reduced from
time to time pursuant to Section 3.02, Section 3.03, Section 9 and/or the
definition of "Total Revolving Loan Commitment."

          "Revolving Note" shall have the meaning provided in Section 1.05(a).

          "SEC" shall mean the Securities and Exchange Commission or any 
successor thereto.

          "Section 4.04(b)(ii) Certificate" shall have the meaning provided in 
Section 4.04(b)(ii).

          "Secured Creditors" shall have the meaning provided in the Security 
Documents.

          "Security Agreement" shall have the meaning provided in Section
5.11(b) and shall include any additional security agreement executed by the
Company or any of its Subsidiaries pursuant to Section 7.11.

          "Security Documents" shall mean and include the Security Agreements
and the Pledge Agreements.

                                      -96-
<PAGE>
          "S&P" shall mean Standard & Poors' Ratings Service.

          "Stated Amount" of each Letter of Credit shall mean the maximum amount
available to be drawn thereunder (regardless of whether any conditions for
drawing could then be met).

          "Subsidiary" of any Person shall mean and include (i) any corporation
more than 50% of whose stock of any class or classes having by the terms thereof
ordinary voting power to elect a majority of the directors of such corporation
(irrespective of whether or not at the time stock of any class or classes of
such corporation shall have or might have voting power by reason of the
happening of any contingency) is at the time owned by such Person directly or
indirectly through Subsidiaries and (ii) any partnership, association, joint
venture or other entity (other than a corporation) in which such Person,
directly or indirectly through Subsidiaries, has more than a 50% equity interest
at the time; provided, however, that for purposes of this Agreement Indrillers
LLC shall not be deemed to be a Subsidiary of the Company.

          "Subsidiary Guarantee" shall mean the Guarantee contained in Section
13 hereof.

          "Subsidiary Guarantor" shall mean each Subsidiary of the Company
executing a Subsidiary Guarantee.

          "Taxes" shall have the meaning provided in Section 4.04.

          "Total Capitalization" shall mean on any date the sum of Consolidated
Debt and Consolidated Net Worth at such time.

          "Total Revolving Loan Commitment" shall mean the sum of the Revolving
Loan Commitments of each of the Lenders it being understood that the Total
Revolving Loan Commitment as of the Initial Borrowing Date shall be $35,000,000.

          "Total Revolving Outstandings" shall mean, at any time, the sum of (i)
the aggregate principal amount of all Revolving Loans outstanding at such time
and (ii) the aggregate amount of all Letter of Credit Outstandings at such time.

          "Total Unutilized Revolving Loan Commitment" shall mean, at any time,
(i) the Total Revolving Loan Commitment at such time less (ii) Total Revolving
Outstandings at such time.

                                      -97-
<PAGE>
          "Type" shall mean any type of Revolving Loan determined with respect
to the interest option applicable thereto, i.e., a Base Rate Loan or a
Eurodollar Loan.

          "UCC" shall mean the Uniform Commercial Code as in effect from time to
time in the relevant jurisdiction.

          "Unfunded Current Liability" of any Plan shall mean the amount, if
any, by which the actuarial present value of the accumulated plan benefits under
the Plan as of the close of its most recent plan year exceeds the fair market
value of the assets allocable thereto, each determined in accordance with
Statement of Financial Accounting Standards No. 87, based upon the actuarial
assumptions used by the Plan's actuary in the most recent annual valuation of
the Plan.

          "Unpaid Drawing" shall have the meaning provided in Section 2.03(a).

          "Unutilized Revolving Loan Commitment" with respect to any Lender at
any time shall mean such Lender's Revolving Loan Commitment at such time less
the sum of (i) the aggregate then outstanding principal amount of all Revolving
Loans made by such Lender and (ii) such Lender's Percentage of the then Letter
of Credit Outstandings.

          "U.S. Dollars" and the sign "$" shall each mean freely transferable 
lawful money of the United States of America.

          "Wholly-Owned Domestic Subsidiary" shall mean, as to any Person, any
Wholly-Owned Subsidiary of such Person which is a Domestic Subsidiary.

          "Wholly-Owned Foreign Subsidiary" shall mean, as to any Person, any
Wholly-Owned Subsidiary of such Person which is a Foreign Subsidiary.

          "Wholly-Owned Subsidiary" shall mean, as to any Person, (i) any
corporation 100% of whose capital stock (other than director's qualifying shares
and/or other nominal amounts of shares required to be held other than by such
Person under applicable law) is at the time owned by such Person and/or one or
more Wholly-Owned Subsidiaries of such Person and (ii) any partnership,
association, joint venture or other entity in which such Person and/or one or
more Wholly-Owned Subsidiaries of such Person has a 100% equity interest at such
time.

                                      -98-
<PAGE>
          "Working Capital" shall mean the excess of Consolidated Current Assets
over Consolidated Current Liabilities.

          "Written" (whether lower or upper case) or "in writing" shall mean any
form of written communication or a communication by means of telex, facsimile
device, or telegraph or cable.

          SECTION 11.  The Agent and Co-Agent.

          11.01 Appointment. Each Lender hereby irrevocably designates and
appoints BTCo as Agent and ING Capital as CoAgent of such Lender (such term to
include for purposes of this Section 11, BTCo acting as Collateral Agent) to act
as specified herein and in the other Credit Documents, and each such Lender
hereby irrevocably authorizes BTCo as Agent and ING Capital as Co-Agent to take
such action on its behalf under the provisions of the Credit Documents and to
exercise such powers and perform such duties as are expressly delegated to the
Agent and Co-Agent by the terms of the Credit Documents, together with such
other powers as are reasonably incidental thereto. The Agent and Co-Agent agree
to act as such upon the express conditions contained in this Section 11.
Notwithstanding any provision to the contrary elsewhere in any Credit Document,
the Agent and Co-Agent shall not have any duties or responsibilities, except
those expressly set forth in the Credit Documents, or any fiduciary relationship
with any Lender, and no implied covenants, functions, responsibilities, duties,
obligations or liabilities shall be read into this Agreement or otherwise
(including by operation of law) to exist against the Agent or Co-Agent. The
provisions of this Section 11 are solely for the benefit of the Agent and
Co-Agent and the Lenders, and neither the Company nor any of its Subsidiaries or
Affiliates shall have any rights as a third party beneficiary of any of the
provisions hereof. In performing its functions and duties under this Agreement,
the Agent and Co-Agent shall act solely as agents of the Lenders and the Agent
and Co-Agent do not assume and shall not be deemed to have assumed any
obligation or relationship of agency or trust with or for the Company or any of
its Subsidiaries or Affiliates.

          11.02 Delegation of Duties. Each of the Agent and Co-Agent may execute
any of its duties under any Credit Document by or through agents or
attorneys-in-fact and shall be entitled to advice of counsel concerning all
matters pertaining to such duties. The Agent and Co-Agent shall not be
responsible for the negligence or misconduct of any agents or

                                      -99-
<PAGE>
attorneys-in-fact selected by either of them with reasonable care except to the
extent otherwise required by Section 11.03.

          11.03 Exculpatory Provisions. Neither of the Agent or Co-Agent nor any
of their Affiliates or any of their officers, directors, employees, agents or
attorneys-in-fact shall be (i) liable for any action lawfully taken or omitted
to be taken by it or such Person in its capacity as Agent or Co-Agent under or
in connection with any Credit Document (except to the extent found to have
resulted from such Person's own gross negligence or willful misconduct) or (ii)
responsible in any manner to any of the Lenders for any recitals, statements,
representations or warranties made by the Company, any of its Subsidiaries or
any of their respective officers contained in any Credit Document, any other
Document or in any certificate, report, statement or other document referred to
or provided for in, or received by the Agent or Co-Agent under or in connection
with, any Document or for any failure of the Company or any of its Subsidiaries
or any of their respective officers to perform its obligations hereunder or
thereunder. Neither the Agent or Co-Agent shall be under any obligation to any
Lender to ascertain or to inquire as to the observance or performance of any of
the agreements contained in, or condition of, any Document, or to inspect the
properties, books or records of the Company or any of its Subsidiaries. The
Agent and the Co-Agent shall not be responsible to any Lender for the
effectiveness, genuineness, validity, enforceability, collectability or
sufficiency of any Document or for any representations, warranties, recitals or
statements made herein or therein or made in any written or oral statement or in
any financial or other statements, instruments, reports, certificates or any
other documents in connection herewith or therewith furnished or made by the
Agent or Co-Agent to the Lenders or by or on behalf of the Company or any of its
Subsidiaries to the Agent or Co-Agent or any Lender or be required to ascertain
or inquire as to the performance or observance of any of the terms, conditions,
provisions, covenants or agreements contained herein or therein or as to the use
of the proceeds of the Loans or of the existence or possible existence of any
Default or Event of Default.

          11.04 Reliance by Agent and Co-Agent. Each of the Agent and Co-Agent
shall be entitled to rely, and shall be fully protected in relying, upon any
note, writing, resolution, notice, consent, certificate, affidavit, letter,
cablegram, telegram, facsimile, telex or teletype message, statement, order or
other document or conversation reasonably believed by it to be genuine and
correct and to have been signed, sent or

                                      -100-
<PAGE>
made by the proper Person or Persons and upon advice and statements of legal
counsel (including, without limitation, counsel to the Company or any of its
Subsidiaries), independent accountants and other experts selected by the Agent
or Co-Agent. Each of the Agent and Co-Agent shall be fully justified in failing
or refusing to take any action under any Credit Document unless is shall first
receive such advice or concurrence of the Required Lenders as it deems
appropriate or it shall first be indemnified to its satisfaction by the Lenders
against any and all liability and expense which may be incurred by it by reason
of taking or continuing to take any such action. The Agent and Co-Agent shall in
all cases be fully protected in acting, or in refraining from acting, under any
of the Credit Documents in accordance with a request of the Required Lenders,
and such request and any action taken or failure to act pursuant thereto shall
be binding upon all the Lenders.

          11.05 Notice of Default. The Agent and Co-Agent shall not be deemed to
have knowledge or notice of the occurrence of any Default or Event of Default
unless the Agent and Co-Agent have actually received notice from a Lender or the
Company referring to this Agreement, describing such Default or Event of Default
and stating that such notice is a "notice of default." In the event that the
Agent and Co-Agent receive such a notice, the Agent and Co-Agent shall give
prompt notice thereof to the Lenders. The Agent and Co-Agent shall take such
action with respect to such Default or Event of Default as shall be reasonably
directed by the Required Lenders; provided that, unless and until the Agent and
Co-Agent shall have received such directions, the Agent and Co-Agent may (but
shall not be obligated to) take such action, or refrain from taking such action,
with respect to such Default or Event of Default as they shall deem advisable in
the best interests of the Lenders.

          11.06 Nonreliance on Agent and Co-Agent and Other Lenders. Each Lender
expressly acknowledges that neither of the Agent or Co-Agent nor any of their
Affiliates nor any of their respective officers, directors, employees, agents or
attorneys-in-fact have made any representations or warranties to them and that
no act by the Agent or Co-Agent hereinafter taken, including any review of the
affairs of the Company or any of its Subsidiaries, shall be deemed to constitute
any representation or warranty by the Agent or Co-Agent or any such other Person
to any Lender. Each Lender represents to the Agent and Co-Agent that it has,
independently and without reliance upon the Agent or Co-Agent or any such other
Person or any

                                      -101-
<PAGE>
other Lender, and based on such documents and information as it has deemed
appropriate, made its own appraisal of and investigation into the business,
assets, operations, property, financial and other condition, prospects and
creditworthiness of the Company and its Subsidiaries and made its own decision
to make its Loans hereunder and enter into this Agreement. Each Lender also
represents that it will, independently and without reliance upon the Agent or
Co-Agent or any such other Person or any other Lender, and based on such
documents and information as it shall deem appropriate at the time, continue to
make its own credit analysis, appraisals and decisions in taking or not taking
action under this Agreement, and to make such investigation as it deems
necessary to inform itself as to the business, assets, operations, property,
financial and other condition, prospects and creditworthiness of the Company and
its Subsidiaries. The Agent and Co-Agent shall not have any duty or
responsibility to provide any Lender with any credit or other information
concerning the business, operations, assets, property, financial and other
condition, prospects or creditworthiness of the Company or any of its
Subsidiaries which may come into the possession of the Agent or Co-Agent or any
of their Affiliates or any of their officers, directors, employees, agents or
attorneys-in-fact.

          11.07 Indemnification. The Lenders agree to indemnify each of the
Agent and Co-Agent in its capacity as such ratably according to their respective
"percentages" as used in determining the Required Lenders at such time (with
such "percentages" to be determined as if there are no Defaulting Lenders), from
and against any and all liabilities, obligations, losses, damages, penalties,
actions, judgments, suits, costs, reasonable expenses or disbursements of any
kind whatsoever which may at any time (including, without limitation, at any
time following the payment of the Obligations) be imposed on, incurred by or
asserted against the Agent or Co-Agent in its capacity as such in any way
relating to or arising out of any Credit Document, or any documents contemplated
by or referred to herein or therein, or the transactions contemplated hereby or
thereby or any action taken or omitted to be taken by the Agent or Co-Agent
under or in connection with any of the foregoing, but only to the extent that
any of the foregoing is not paid by the Company or any of its Subsidiaries;
provided that no Lender shall be liable to the Agent or Co-Agent for the payment
of any portion of such liabilities, obligations, losses, damages, penalties,
actions, judgments, suits, costs, expenses or disbursements to the extent found
to have resulted solely from the gross negligence or willful misconduct of such
Agent

                                      -102-
<PAGE>
or Co-Agent. To the extent any Lender would be required to indemnify the Agent
or Co-Agent pursuant to the immediately preceding sentence but for the fact that
it is a Defaulting Lender, such Defaulting Lender shall not be entitled to
receive any portion of any payment or other distribution hereunder (including,
without limitation as to principal of or interest on any Loans) until each other
Lender shall have been reimbursed for the excess, if any, of the aggregate
amount paid by such Lender under this Section 11.07 over the aggregate amount
such Lender would have been obligated to pay had such first Lender not been a
Defaulting Lender. If any indemnity furnished to the Agent or Co-Agent for any
purpose shall, in the opinion of such Agent or Co-Agent be insufficient or
become impaired, the Agent or Co-Agent may call for additional indemnity and
cease, or not commence, to do the acts indemnified against until such additional
indemnity is furnished. The agreements in this Section 11.07 shall survive the
payment of all Obligations.

          11.08 Agent or Co-Agent in Its Individual Capacity. The Agent or
Co-Agent and their respective Affiliates may make loans to, accept deposits from
and generally engage in any kind of business with the Company and its
Subsidiaries and Affiliates as though the Agent or Co-Agent were not an Agent or
Co-Agent hereunder. With respect to the Loans made by it and all Obligations
owing to it, the Agent and Co-Agent shall have the same rights and powers under
this Agreement as any Lender and may exercise the same as though it were not an
Agent or Co-Agent and the terms "Lender" and "Lenders" shall include each of the
Agent or Co-Agent in its individual capacity.

          11.09 Holders. The Agent or Co-Agent may deem and treat the payee of
any Note as the owner thereof for all purposes hereof unless and until a written
notice of the assignment, transfer or endorsement thereof, as the case may be,
shall have been filed with the Agent. Any request, authority or consent of any
Person or entity who, at the time of making such request or giving such
authority or consent, is the holder of any Note shall be conclusive and binding
on any subsequent holder, transferee, assignee or indorsee, as the case may be,
of such Note or of any Note or Notes issued in exchange therefor.

          11.10  Resignation of the Agent or Co-Agent; Successor Agent or 
Co-Agent.  The Agent or Co-Agent may resign as the Agent or Co-Agent upon 60 
days' notice to the Lenders and the Company.  Upon the resignation the Agent or 
Co-Agent, the

                                      -103-
<PAGE>
Required Lenders shall appoint from among the Lenders a successor Agent or
Co-Agent which is a bank or a trust company for the Lenders subject to prior
approval by the Company (such approval not to be unreasonably withheld, provided
that such approval shall not be required if a Default or an Event of Default
then exists), whereupon such successor agent shall succeed to the rights, powers
and duties of the Agent or Co-Agent, as the case may be, and the term "Agent" or
"Co-Agent" shall include such successor agent effective upon its appointment,
and the resigning Agent's or Co-Agent's rights, powers and duties as the Agent
or Co-Agent shall be terminated, without any other or further act or deed on the
part of such former Agent or Co-Agent or any of the parties to this Agreement.
After the resignation of the Agent or Co-Agent hereunder, the provisions of this
Section 11 shall inure to its benefit as to any actions taken or omitted to be
taken by it while it was the Agent or Co-Agent under this Agreement.

          SECTION 12.  Miscellaneous.

          12.01 Payment of Expenses, Etc. The Borrowers agree, jointly and
severally, to: (i) whether or not the transactions herein contemplated are
consummated, pay all out-of-pocket costs and expenses of each of the Agent and
Co-Agent (including, without limitation, the reasonable fees and disbursements
of Cahill Gordon & Reindel) in connection with the negotiation, preparation,
execution and delivery of the Credit Documents and the documents and instruments
referred to therein and any amendment, waiver or consent relating thereto and in
connection with the Agent's and Co-Agent's syndication efforts with respect to
this Agreement; (ii) pay all out-of-pocket costs and expenses of each of the
Agent and Co-Agent, each Letter of Credit Issuer and each of the Lenders in
connection with the enforcement of the Credit Documents and the documents and
instruments referred to therein and, after a Default or an Event of Default
shall have occurred and be continuing, the protection of the rights of each of
the Agent and Co-Agent, each Letter of Credit Issuer and each of the Lenders
thereunder (including, without limitation, the fees and disbursements of counsel
for each of the Agent and Co-Agent, for each Letter of Credit Issuer and for
each of the Lenders); (iii) pay and hold each of the Lenders harmless from and
against any and all present and future stamp and other similar taxes with
respect to the foregoing matters and save each of the Lenders harmless from and
against any and all liabilities with respect to or resulting from any delay or
omission (other than to the extent attributable to such Lender) to pay such
taxes; and (iv)

                                      -104-
<PAGE>
indemnify each of the Agent, the Co-Agent, the Collateral Agent, each Letter of
Credit Issuer and each Lender and each of their Affiliates, and each of their
respective officers, directors, employees, representatives and agents from and
hold each of them harmless against any and all losses, liabilities, claims,
damages or expenses incurred by any of them as a result of, or arising out of,
or in any way related to, or by reason of, (a) any investigation, litigation or
other proceeding (whether or not any such Person is a party thereto and whether
or not any such investigation, litigation or other proceeding is between or
among any such Person, or any third Person or otherwise) related to the entering
into and/or performance of any Credit Document or the use of the proceeds of any
Loans hereunder or the consummation of any other transactions contemplated in
any Credit Document (but excluding any such losses, liabilities, claims, damages
or expenses to the extent found to have been incurred by reason of the gross
negligence or willful misconduct of the Person to be indemnified), or (b) the
actual or alleged presence of Hazardous Materials in the air, surface water or
groundwater or on the surface or subsurface of any Real Property or any
Environmental Claim, in each case, including, without limitation, the reasonable
fees and disbursements of counsel and independent consultants incurred in
connection with any such investigation, litigation or other proceeding.

          12.02 Right of Setoff. In addition to any rights now or hereafter
granted under applicable law or otherwise, and not by way of limitation of any
such rights, upon the occurrence of an Event of Default, each of the Agent, the
Co-Agent, each Letter of Credit Issuer and each Lender is hereby authorized at
any time or from time to time, without presentment, demand, protest or any other
notice of any kind to the Company or any of its Subsidiaries or any Guarantor or
any other Person, any such notice, to the full extent permitted by applicable
law, being hereby expressly waived, to set off and to appropriate and apply any
and all deposits (general or special) and any other Indebtedness at any time
held or owing by the Agent, Co-Agent, such Letter of Credit Issuer or such
Lender (including, without limitation, by branches and agencies of the Agent,
Co-Agent, such Letter of Credit Issuer and such Lender wherever located) to or
for the credit or the account of the Borrowers or any Guarantor against and on
account of the Obligations of the Borrowers or any Guarantor to the Agent,
Co-Agent, such Letter of Credit Issuer or such Lender under this Agreement or
under any of the other Credit Documents, including, without limitation, all
interests in Obligations of the Borrowers or any Guarantor purchased by such
Lender

                                      -105-
<PAGE>
pursuant to Section 12.06(b), and all other claims of any nature or description
arising out of or connected with any Credit Document, irrespective of whether or
not such Agent, Co-Agent, such Letter of Credit Issuer or such Lender shall have
made any demand hereunder and although said Obligations shall be contingent or
unmatured.

          12.03 Notices. Except as otherwise expressly provided herein, all
notices and other communications provided for hereunder shall be in writing
(including telegraphic, telex, facsimile or cable communication) and mailed,
telegraphed, telexed, telecopied, cabled or delivered, if to any Credit Party,
at the address specified opposite its signature below or in the other relevant
Credit Documents, as the case may be; if to any Lender, at its address specified
for such Lender on Annex II; or, at such other address as shall be designated by
any party in a written notice to the other parties hereto. All such notices and
communications shall be mailed, telegraphed, telexed, telecopied or cabled or
sent by overnight courier, and shall be effective when received. For all
purposes hereunder, notice delivered to one Borrower shall be deemed to be
notice to each Borrower.

          12.04 Benefit of Agreement. (a) This Agreement shall be binding upon
and inure to the benefit of and be enforceable by the respective successors and
assigns of the parties hereto; provided, however, neither the Borrowers nor any
Guarantor may assign or transfer any of its rights, obligations or interest
under any Credit Document without the prior written consent of the Lenders; and
provided, further, that, although any Lender may transfer, assign or grant
participations in its rights hereunder, such Lender shall remain a "Lender" for
all purposes hereunder (and may not transfer or assign all or any portion of its
Revolving Loan Commitment hereunder except as provided in Section 12.04(b)) and
the transferee, assignee or participant, as the case may be, shall not
constitute a "Lender" hereunder; and provided, further, that no Lender shall
transfer or grant any participation under which the participant shall have
rights to approve any amendment to or waiver of any Credit Document except to
the extent such amendment or waiver would (i) extend the Final Maturity Date, or
reduce the rate or extend the time of payment of interest or Fees on Loans or
Letters of Credit in which such participant is participating (except in
connection with a waiver of applicability of any post-default increase in
interest rates) or reduce the principal amount thereof (it being understood that
any amendment or modification to the financial

                                      -106-
<PAGE>
definitions in this Agreement shall not constitute a reduction in any rate of
interest or fees for purposes of this clause (i), or increase the amount of the
participant's participation over the amount thereof, or increase the amount of
the participant's participation over the amount thereof then in effect (it being
understood that a waiver of any Default or Event of Default or of a mandatory
reduction in the Total Revolving Loan Commitment shall not constitute a change
in the terms of such participation, and that an increase in any Revolving Loan
Commitment or Loan shall be permitted without the consent of any participant if
the participant's participation is not increased as a result thereof), (ii)
consent to the assignment or transfer by the Borrowers of any of their rights
and obligations under this Agreement or (iii) release all or substantially all
of the Collateral under all of the Security Documents (except as expressly
provided in the Credit Documents) supporting the Loans in which such participant
is participating. In the case of any such participation, the participant shall
not have any rights under any of the Credit Documents (the participant's rights
against such Lender in respect of such participation to be those set forth in
the agreement executed by such Lender in favor of the participant relating
thereto) and all amounts payable by the Borrowers hereunder shall be determined
as if such Lender had not sold such participation.

          (b) Notwithstanding the foregoing, any Lender (or any Lender together
with one or more other Lenders) may (x) assign all or a portion of its Revolving
Loan Commitment (and related outstanding Obligations hereunder) to any Affiliate
of such Lender which is at least 50% owned by such Lender or its parent company
or to one or more Lenders or (y) assign all, or if less than all, a portion
equal to at least $2,000,000 in the aggregate for the assigning Lender or
assigning Lenders, of such Revolving Loan Commitment (and related outstanding
Obligations hereunder) to one or more Eligible Transferees, each of which
assignees shall become a party to this Agreement as a Lender by execution of an
Assignment and Assumption Agreement; provided that (i) at such time Annex I
shall be deemed modified to reflect the Revolving Loan Commitments of such new
Lender and of the existing Lenders, (ii) upon surrender of the old Revolving
Notes, new Revolving Notes will be issued, at the Borrowers' expense, to such
new Lender and to the assigning Lender, such new Revolving Notes to be in
conformity with the requirements of Section 1.05 (with appropriate
modifications) to the extent needed to reflect the revised Revolving Loan
Commitments, (iii) the consent of the Agent shall be required in connection with
any such assignment

                                      -107-
<PAGE>
pursuant to clause (y) of this Section 12.04(b) and (iv) the Agent shall receive
at the time of each such assignment, from the assigning or assignee Lender, the
payment of a non-refundable assignment fee of $3,500; and provided, further,
that such transfer or assignment will not be effective until recorded by the
Agent on the Register pursuant to Section 7.12. To the extent of any assignment
pursuant to this Section 12.04(b), the assigning Lender shall be relieved of its
obligations hereunder with respect to its assigned Revolving Loan Commitment. At
the time of each assignment pursuant to this Section 12.04(b) to a Person which
is not already a Lender hereunder and which is not a United States person (as
such term is defined in Section 7701(a)(30) of the Code) for Federal income tax
purposes, the respective assignee Lender shall provide to the Borrowers and the
Agent the appropriate Internal Revenue Service Forms (and, if applicable, a
Section 4.04(b)(ii) Certificate) described in Section 4.04(b).

          (c) Any Lender may at any time pledge or assign all or any portion of
its rights under this Agreement and the other loan documents to any Federal
Reserve Bank without notice to or consent of the Borrowers. No such pledge or
assignment shall release the transferor Lender from its obligations hereunder.

          12.05 No Waiver; Remedies Cumulative. No failure or delay on the part
of any party in exercising any right, power or privilege under any Credit
Document and no course of dealing between any Credit Party and the Agent,
Co-Agent or any Lender shall operate as a waiver thereof; nor shall any single
or partial exercise of any right, power or privilege under any Credit Document
preclude any other or further exercise thereof or the exercise of any other
right, power or privilege hereunder or thereunder. The rights and remedies
herein expressly provided are cumulative and not exclusive of any rights or
remedies which any party would otherwise have. No notice to or demand on any
Credit Party in any case shall entitle any Credit Party to any other or further
notice or demand in similar or other circumstances or constitute a waiver of the
rights of the Agent, Co-Agent or the Lenders to any other or further action in
any circumstances without notice or demand.

          12.06 Payments Pro Rata. (a) The Agent agrees that promptly after its
receipt of each payment from or on behalf of any Credit Party in respect of any
Obligations of such Credit Party, it shall, except as otherwise provided in this
Agreement, distribute such payment to the Lenders (other than any Lender that
has consented in writing to waive its pro rata

                                      -108-
<PAGE>
share of such payment) pro rata based upon their respective shares, if any, of
the Obligations with respect to which such payment was received.

          (b) Each of the Lenders agrees that, if it should receive any amount
hereunder (whether by voluntary payment, by realization upon security, by the
exercise of the right of set-off or banker's lien, by counterclaim or cross
action, by the enforcement of any right under the Credit Documents, or
otherwise) which is applicable to the payment of the principal of, or interest
on, the Loans, Unpaid Drawings or Fees, of a sum which with respect to the
related sum or sums received by other Lenders is in a greater proportion than
the total of such Obligation then owed and due to such Lender bears to the total
of such Obligation then owed and due to all of the Lenders immediately prior to
such receipt, determined in accordance with the terms of this Agreement, then
such Lender receiving such excess payment shall purchase for cash without
recourse or warranty from the other Lenders an interest in the Obligations of
the respective Credit Party to such Lenders in such amount as shall result in a
proportional participation by all of the Lenders in such amount; provided that
if all or any portion of such excess amount is thereafter recovered from such
Lender, such purchase shall be rescinded and the purchase price restored to the
extent of such recovery, but without interest.

          12.07 Calculations; Computations. (a) The financial statements to be
furnished to the Lenders pursuant hereto shall be made and prepared in
accordance with GAAP consistently applied throughout the periods involved
(except as set forth in the notes thereto or as otherwise disclosed in writing
by the Company to the Lenders); provided that except as otherwise specifically
provided herein, all computations determining compliance with Sections 3.03 and
8, including definitions used therein shall, (x) in each case, utilize
accounting principles and policies in effect at the time of the preparation of,
and in conformity with those used to prepare, the 1996 financial statements
delivered to the Lenders pursuant to Section 6.10(b), and (y) to the extent any
period covered by such computation (including any Test Period) includes a period
prior to the date of the consummation of the Acquisition, such computation shall
be made on a pro forma basis as if the Acquisition had occurred at the beginning
of such period.

          (b) All computations of interest and Fees hereunder shall be based on
the actual number of days elapsed over a year of 360 days (except for interest
payable in respect of Base

                                      -109-
<PAGE>
Rate Loans based on the Prime Lending Rate, which shall be computed on the bases
of a 365/66 day year).

          12.08 Governing Law; Submission to Jurisdiction; Venue. (a) THIS
AGREEMENT AND THE OTHER CREDIT DOCUMENTS AND THE RIGHTS AND OBLIGATIONS OF THE
PARTIES HEREUNDER AND (EXCEPT AS OTHERWISE EXPRESSLY STATED THEREIN) THEREUNDER
SHALL BE CONSTRUED IN ACCORDANCE WITH AND BE GOVERNED BY THE LAW OF THE STATE OF
NEW YORK. Any legal action or proceeding with respect to this Agreement or any
other Credit Document may be brought in the courts of the State of New York or
of the United States for the Southern District of New York, and, by execution
and delivery of this Agreement, each Credit Party hereby irrevocably accepts for
itself and in respect of its property, generally and unconditionally, the
jurisdiction of the aforesaid courts. Each Credit Party hereby further
irrevocably waives any claim that any such courts lack jurisdiction over such
Credit Party, and agrees not to plead or claim, in any legal action or
proceeding with respect to any Credit Document brought in any of the aforesaid
courts, that any such court lacks jurisdiction over such Credit Party. Each
Credit Party irrevocably consents to the service of process in any such action
or proceeding by the mailing of copies thereof by registered or certified mail,
postage prepaid, to such Credit Party, at its address for notices pursuant to
Section 12.03, such service to become effective 30 days after such mailing. Each
Credit Party hereby irrevocably waives any objection to such service of process
and further irrevocably waives and agrees not to plead or claim in any action or
proceeding commenced under any Credit Document that service of process was in
any way invalid or ineffective. Nothing herein shall affect the right of the
Agent, Co-Agent, any Lender or the holder of any Note to serve process in any
other manner permitted by applicable law or to commence legal proceedings or
otherwise proceed against any Credit Party in any other jurisdiction.

          (b) Each Credit Party hereby irrevocably waives any objection which it
may now or hereafter have to the laying of venue of any of the aforesaid actions
or proceedings arising out of or in connection with any Credit Document brought
in the courts referred to in clause (a) above and hereby further irrevocably
waives and agrees not to plead or claim in any such court that any such action
or proceeding brought in any such court has been brought in an inconvenient
forum.

          12.09 Counterparts. This Agreement may be executed in any number of
counterparts and by the different parties

                                      -110-
<PAGE>
hereto on separate counterparts, each of which when so executed and delivered
shall be an original, but all of which shall together constitute one and the
same instrument. A complete set of counterparts executed by all of the parties
hereto shall be lodged with the Borrower and the Agent.

          12.10 Effectiveness. This Agreement shall become effective on the date
(the "Effective Date") on which the Borrowers, each Guarantor, the Agent, the
Co-Agent and each of the Lenders shall have signed a counterpart hereof (whether
the same or different counterparts) and shall have delivered the same to the
Agent at the Notice Office or, in the case of the Lenders, shall have given to
the Agent telephonic (confirmed in writing), written, telex or facsimile notice
(actually received) at such office that the same has been signed and mailed to
it. The Agent will give the Borrowers and each Lender prompt written notice of
the occurrence of the Effective Date.

          12.11 Headings Descriptive. The headings of the several sections and
subsections of this Agreement are inserted for convenience only and shall not in
any way affect the mean- ing or construction of any provision of this Agreement.

          12.12 Amendment or Waiver; etc. (a) Neither this Agreement nor any
other Credit Document nor any terms hereof or thereof may be changed, waived,
discharged or terminated unless such change, waiver, discharge or termination is
in writing signed by the respective Credit Parties party thereto and the
Required Lenders; provided that no such change, waiver, discharge or termination
shall, without the consent of each Lender (other than a Defaulting Lender) (with
Obligations being directly affected thereby in the case of the following clause
(i)), (i) extend the Final Maturity Date, or reduce the rate or extend the time
of payment of interest or Fees on any Loan or Letter of Credit thereon, or
reduce the principal amount thereof (it being understood that any amendment or
modification to the financial definitions in this Agreement shall not constitute
a reduction in any rate of interest or fees for purposes of this clause (i)),
(ii) release all or substantially all of the Collateral (except as expressly
provided in the Security Documents) under all the Security Documents, or release
any Guarantor (other than in connection with a sale otherwise permitted hereby),
(iii) amend, modify or waive any provision of this Section 12.12, (iv) reduce
the percentage specified in the definition of Required Lenders (it being
understood that, with the consent of the Required Lenders,

                                      -111-
<PAGE>
additional extensions of credit pursuant to this Agreement may be included in
the determination of the Required Lenders on substantially the same basis as the
extensions of Revolving Loan Commitments are included on the Effective Date) or
(v) consent to the assignment or transfer by the Borrowers of any of their
rights and obligations under this Agreement; provided, further, that no such
change, waiver, discharge or termination shall (w) increase the Revolving Loan
Commitments of any Lender over the amount thereof then in effect without the
consent of such Lender (it being understood that waivers or modifications of
conditions precedent, covenants, Defaults or Events of Default or of a mandatory
reduction in the Total Revolving Loan Commitment shall not constitute an
increase of the Revolving Loan Commitment of any Lender, and that an increase in
the available portion of any Revolving Loan Commitment of any Lender shall not
constitute an increase in the Revolving Loan Commitment of such Lender), (x)
without the consent of BTCo., amend, modify or waive any provision of Section 2
or alter its rights or obligations with respect to Letters of Credit, (y)
without the consent of the Agent and Co-Agent, amend, modify or waive any
provision of Section 11 as the same applies to the Agent and Co-Agent or any
other provision as the same relates to the rights or obligations of the Agent
and Co-Agent and (z) without the consent of the Collateral Agent, amend, modify
or waive any provision relating to the rights or obligations of the Collateral
Agent.

          (b) If, in connection with any proposed change, waiver, discharge or
termination of any of the provisions of this Agreement as contemplated by
clauses (i) through (v), inclusive, of the first proviso to Section 12.12(a),
the consent of the Required Lenders is obtained but the consent of one or more
of such other Lenders whose consent is required is not obtained, then the
Borrowers shall have the right, so long as all non-consenting Lenders whose
individual consent is required are treated as described below, to replace each
such non-consenting Lender or Lenders with one or more Replacement Lenders
pursuant to Section 1.13 so long as at the time of such replacement, each
Replacement Lender consents to the proposed change, waiver, discharge or
termination; but only if, in each such case, such Replacement Lender at the time
of such action is acceptable to the Agent, provided that the Borrowers shall not
have the right to replace a Lender solely as a result of the exercise of such
Lender's rights (and the withholding of any required consent by such Lender)
pursuant to the second proviso to Section 12.12(a).

                             -112-
<PAGE>
          12.13 Survival. All indemnities set forth herein including, without
limitation, in Section 1.10, 1.11, 2.05, 4.04, 11.07 or 12.01, shall survive the
execution and delivery of this Agreement and the making and repayment of the
Loans.

          12.14 Domicile of Loans. Each Lender may transfer and carry its Loans
at, to or for the account of any branch office, subsidiary or affiliate of such
Lender; provided that the Company shall not be responsible for costs arising
under Section 1.10, 1.11, 2.05 or 4.04 resulting from any such transfer (other
than a transfer pursuant to Section 1.12) to the extent such costs would not
otherwise be applicable to such Lender in the absence of such transfer.

          12.15 Confidentiality. Each of the Lenders agrees that it will use its
reasonable efforts not to disclose without the prior consent of the Company
(other than to Affiliates of such Lenders and their respective directors,
employees, auditors, counsel or other professional advisors) any confidential
information with respect to the Company or any of its Subsidiaries which is
furnished pursuant to this Agreement; provided that any Lender may disclose any
such information (a) that is or has become generally available to the public,
(b) as may be required or appropriate (x) in any report, statement or testimony
submitted to any municipal, state or Federal or other governmental regulatory
body having or claiming to have jurisdiction over such Lender or to the Federal
Reserve Board or the Federal Deposit Insurance Corporation or similar
organizations (whether in the United States or elsewhere) or their successors or
(y) in connection with any request or requirement of any such regulatory body,
(c) as may be required or appropriate in response to any summons or subpoena or
in connection with any litigation, (d) to comply with any law, order, regulation
or ruling applicable to such Lender, and (e) to any prospective transferee in
connection with any contemplated transfer of any of the Notes or any interest
therein by such Lender; provided that such prospective transferee agrees to be
bound by this Section 12.15 to the same extent as such Lender.

          12.16 Waiver of Jury Trial. EACH OF THE PARTIES TO THIS AGREEMENT
HEREBY IRREVOCABLY WAIVES ALL RIGHT TO A TRIAL BY JURY IN ANY ACTION, PROCEEDING
OR COUNTERCLAIM ARISING OUT OF OR RELATING TO THIS AGREEMENT, THE OTHER CREDIT
DOCUMENTS OR THE TRANSACTIONS CONTEMPLATED HEREBY OR THEREBY.

                                      -113-
<PAGE>
          SECTION 13.  Subsidiary Guarantees.

          13.01 The Subsidiary Guarantees. (a) In order to induce the Lenders to
enter into this Agreement and to extend credit hereunder and in recognition of
the direct and indirect benefits to be received by each Subsidiary Guarantor
from the proceeds of the Loans and the issuance of the Letters of Credit, each
Subsidiary Guarantor hereby agrees with the Lenders as follows: each Subsidiary
Guarantor hereby unconditionally and irrevocably, jointly and severally,
guarantees, as primary obligor and not merely as surety the full and prompt
payment when due, whether upon maturity, acceleration or otherwise, of any and
all of the Guaranteed Obligations of the Borrowers to the Guaranteed Creditors.
If any or all of the Guaranteed Obligations of the Borrowers to the Guaranteed
Creditors becomes due and payable hereunder, each Subsidiary Guarantor, jointly
and severally, and unconditionally promises to pay such indebtedness to the
Guaranteed Creditors, or order, on demand, together with any and all expenses
(including reasonable legal fees and expenses) which may be incurred by the
Guaranteed Creditors in collecting or enforcing any of the Guaranteed
Obligations. If claim is ever made upon any Guaranteed Creditor for repayment or
recovery of any amount or amounts received in payment or on account of any of
the Guaranteed Obligations and any of the aforesaid payees repays all or part of
said amount by reason of (i) any judgment, decree or order of any court or
administrative body having jurisdiction over such payee or any of its property
or (ii) any settlement or compromise of any such claim effected by such payee
with any such claimant (including the Borrowers), then and in such event each
Subsidiary Guarantor agrees that any such judgment, decree, order, settlement or
compromise shall be binding upon such Subsidiary Guarantor, notwithstanding any
revocation of this Subsidiary Guarantee or any other instrument evidencing any
liability of the Borrowers, and each Subsidiary Guarantor shall be and remain
jointly and severally liable to the aforesaid payees hereunder for the amount so
repaid or recovered to the same extent as if such amount had never originally
been received by any such payee. This is a guarantee of payment and not of
collection.

          (b) Anything contained in this Subsidiary Guarantee to the contrary
notwithstanding, the obligations of each Subsidiary Guarantor hereunder shall be
limited to a maximum aggregate amount equal to the largest amount that would not
render its obligations and/or the grant of security interests in Collateral to
secure its Obligations hereunder subject to

                                      -114-
<PAGE>
avoidance as a fraudulent transfer or conveyance under Section 548 of the
Bankruptcy Code or any applicable provisions of comparable state law
(collectively, the "Fraudulent Transfer Laws"), in each case after giving effect
to all other liabilities of such Subsidiary Guarantor, contingent or otherwise,
that are relevant under the Fraudulent Transfer Laws (specifically excluding,
however, any liabilities of such Subsidiary Guarantor in respect of intercompany
Indebtedness to the Company or other Affiliates of the Company to the extent
that such Indebtedness would be discharged in an amount equal to the amount paid
by such Subsidiary Guarantor hereunder, and after giving effect (x) to the
direct and indirect benefits received by such Subsidiary Guarantor as a result
of the Credit Documents and the Loans and (y) as assets to the value (as
determined under the applicable provisions of the Fraudulent Transfer Laws) of
any rights to subrogation, reimbursement, indemnification or contribution of
such Subsidiary Guarantor pursuant to applicable law or pursuant to the terms of
any agreement (including without limitation any such right of contribution under
Section 13.01(c)).

          (c) Subsidiary Guarantors under this Subsidiary Guarantee together
desire to allocate among themselves in a fair and equitable manner their
obligations arising under this Subsidiary Guarantee. Accordingly, in the event
any payment or distribution is made on any date by any Subsidiary Guarantor
under this Subsidiary Guarantee (a "Funding Guarantor") that exceeds its Fair
Share (as defined below) as of such date, that Funding Guarantor shall be
entitled to a contribution from each of the other Subsidiary Guarantors in the
amount of such other Subsidiary Guarantor's Fair Share Shortfall (as defined
below) as of such date, with the result that all such contributions will cause
each Subsidiary Guarantor's Aggregate Payments (as defined below) to equal its
Fair Share as of such date. "Fair Share" means, with respect to a Subsidiary
Guarantor as of any date of determination, an amount equal to (i) the ratio of
(x) the Adjusted Maximum Amount (as defined below) with respect to such
Subsidiary Guarantor to (y) the aggregate of the Adjusted Maximum Amounts with
respect to all Subsidiary Guarantors, multiplied by (ii) the aggregate amount
paid or distributed on or before such date by all Funding Guarantors under this
Subsidiary Guarantee in respect of the obligations guaranteed. "Fair Share
Shortfall" means, with respect to a Subsidiary Guarantor as of any date of
determination, the excess, if any, of the Fair Share of such Subsidiary
Guarantor over the Aggregate Payments of such Subsidiary Guarantor. "Adjusted
Maximum Amount" means, with respect to a Guarantor as of any

                                      -115-
<PAGE>
date of determination, the maximum aggregate amount of the obligations of such
Subsidiary Guarantor under this Subsidiary Guarantee, determined as of such date
in accordance with this Section 13.01; provided that, solely for purposes of
calculating the "Adjusted Maximum Amount" with respect to any Subsidiary
Guarantor for purposes of this Section 13.01(c), any assets or liabilities of
such Subsidiary Guarantor arising by virtue of any rights to subrogation,
reimbursement or indemnification or any rights to or obligations of contribution
hereunder shall not be considered as assets or liabilities of such Subsidiary
Guarantor. "Aggregate Payments" means, with respect to a Subsidiary Guarantor as
of any date of determination, an amount equal to (i) the aggregate amount of all
payments and distributions made on or before such date by such Subsidiary
Guarantor in respect of this Subsidiary Guarantee (including, without
limitation, in respect of this Section 13.01(c)) minus (ii) the aggregate amount
of all payments received on or before such date by such Subsidiary Guarantor
from the other Subsidiary Guarantors as contributions under this Section
13.01(c). The amounts payable as contributions hereunder shall be determined as
of the date on which the related payment or distribution is made by the
applicable Funding Guarantor. The allocation among Subsidiary Guarantors of
their obligations as set forth in this Section 13.01(c) shall not be construed
in any way to limit the liability of any Subsidiary Guarantor hereunder.

          13.02 Bankruptcy. Additionally, each Subsidiary Guarantor
unconditionally and irrevocably, jointly and severally, guarantees the payment
of any and all of the Guaranteed Obligations of the Borrowers or any Guarantor
to the Guaranteed Creditors whether or not due or payable by the Borrowers upon
the occurrence of any of the events specified in Section 9.05, and
unconditionally, and jointly and severally, promises to pay such indebtedness to
the Guaranteed Creditors, or order, on demand, in lawful money of the United
States.

          13.03 Nature of Liability. (a) The liability of each Subsidiary
Guarantor hereunder is joint and several and exclusive and independent of any
security for or other guarantee of the Guaranteed Obligations of the Borrowers
or any Guarantor whether executed by such Guarantor, any other Guarantor, any
other guarantor or by any other party, and the liability of each Subsidiary
Guarantor hereunder is not affected or impaired by (a) any direction as to
application of payment by the Borrowers or by any other party, or (b) any other
continuing or other guarantee, undertaking or maximum liability of a

                                      -116-
<PAGE>
guarantor or of any other party as to the Guaranteed Obligations of the
Borrowers, or (c) any payment on or in reduction of any such other guarantee or
undertaking, or (d) any dissolution, termination or increase, decrease or change
in personnel by the Borrowers, or (e) any payment made to the Guaranteed
Creditors on the Guaranteed Obligations which any such Guaranteed Creditor
repays to the Borrowers pursuant to court order in any bankruptcy,
reorganization, arrangement, moratorium or other debtor relief proceeding, and
each Subsidiary Guarantor, to the extent permitted by applicable law, waives any
right to the deferral or modification of its obligations hereunder by reason of
any such proceeding.

          (b) It is the desire and intent of each Subsidiary Guarantor and the
Guaranteed Creditors that this Subsidiary Guarantee shall be enforced against
each Subsidiary Guarantor to the fullest extent permissible under the laws and
public policies applied in each jurisdiction in which enforcement is sought. If,
however, and to the extent that, the obligations of any Subsidiary Guarantor
under this Subsidiary Guarantee shall be adjudicated to be invalid or
unenforceable for any reason (including, without limitation, because of any
applicable state or federal law relating to fraudulent conveyances or
transfers), then the amount of the Guaranteed Obligations of such Subsidiary
Guarantor shall be deemed to be reduced and such Subsidiary Guarantor shall pay
the maximum amount of the Guaranteed Obligations which would be permissible
under applicable law.

          13.04 Independent Obligation. The obligations of each Subsidiary
Guarantor hereunder are independent of the obligations of any other Subsidiary
Guarantor, any other guarantor, any other party or the Borrowers, and a separate
action or actions may be brought and prosecuted against each Subsidiary
Guarantor whether or not action is brought against any other Subsidiary
Guarantor, any other guarantor, any other party or the Borrowers and whether or
not any other guarantor, any other party or the Borrowers are joined in any such
action or actions. Each Subsidiary Guarantor waives, to the full extent
permitted by law, the benefit of any statute of limitations affecting its
liability hereunder or the enforcement thereof. Any payment by the Borrowers or
other circumstance which operates to toll any statute of limitations as to the
Borrowers shall operate to toll the statute of limitations as to any Subsidiary
Guarantor.

                                      -117-
<PAGE>
          13.05 Authorization. Each Subsidiary Guarantor authorizes the
Guaranteed Creditors without notice or demand (except as shall be required by
applicable statute and cannot be waived), and without affecting or impairing its
liability hereunder, from time to time to:

          (a) change the manner, place or terms of payment of, and/or change or
     extend the time of payment of, renew, increase, accelerate or alter, any of
     the Guaranteed Obligations (including any increase or decrease in the rate
     of interest thereon), any security therefor, or any liability incurred
     directly or indirectly in respect thereof, and the Subsidiary Guarantee
     herein made shall apply to the Guaranteed Obligations as so changed,
     extended, renewed or altered;

          (b) take and hold security for the payment of the Guaranteed
     Obligations and sell, exchange, release, surrender, realize upon or
     otherwise deal with in any manner and in any order any property by
     whomsoever at any time pledged or mortgaged to secure, or howsoever
     securing, the Guaranteed Obligations or any liabilities (including any of
     those hereunder) incurred directly or indirectly in respect thereof or
     hereof, and/or any offset thereagainst;

          (c) exercise or refrain from exercising any rights against the
     Borrowers or others or otherwise act or refrain from acting;

          (d) release or substitute any one or more endorsers, guarantors, the
     Borrowers or other obligors;

          (e) settle or compromise any of the Guaranteed Obligations, any
     security therefor or any liability (including any of those hereunder)
     incurred directly or indirectly in respect thereof or hereof, and may
     subordinate the payment of all or any part thereof to the payment of any
     liability (whether due or not) of the Borrowers to its creditors other than
     the Guaranteed Creditors;

          (f) apply any sums by whomsoever paid or howsoever realized to any
     liability or liabilities of the Borrowers to the Guaranteed Creditors
     regardless of what liability or liabilities of the Borrowers remain unpaid;

          (g) consent to or waive any breach of, or any act, omission or default
     under, this Agreement, any other

                                      -118-
<PAGE>
     Credit Document or any of the instruments or agreements referred to herein
     or therein, or otherwise amend, modify or supplement this Agreement, any
     other Credit Document or any of such other instruments or agreements;
     and/or

          (h) take any other action which would, under otherwise applicable
     principles of common law, give rise to a legal or equitable discharge of
     any Subsidiary Guarantor from its liabilities under this Subsidiary
     Guarantee.

          13.06 Reliance. It is not necessary for the Guaranteed Creditors to
inquire into the capacity or powers of the Borrowers or the officers, directors,
partners or agents acting or purporting to act on its behalf, and any Guaranteed
Obligations made or created in reliance upon the professed exercise of such
powers shall be guaranteed hereunder.

          13.07 Subordination. Any of the indebtedness of the Borrowers now or
hereafter owing to any Subsidiary Guarantor is hereby subordinated to the
Guaranteed Obligations of the Borrowers owing to the Guaranteed Creditors; and
if the Agent so requests at a time when an Event of Default exists, all such
indebtedness of the Borrowers to any Subsidiary Guarantor shall be collected,
enforced and received by such Subsidiary Guarantor for the benefit of the
Guaranteed Creditors and be paid over to the Agent on behalf of the Guaranteed
Creditors on account of the Guaranteed Obligations of the Borrowers to the
Guaranteed Creditors, but without affecting or impairing in any manner the
liability of any Subsidiary Guarantor under the other provisions of this
Subsidiary Guarantee (other than the reduction of any such liability
attributable to such payment). Prior to the transfer by any Subsidiary Guarantor
of any note or negotiable instrument evidencing any of the indebtedness of the
Borrowers to such Subsidiary Guarantor, such Subsidiary Guarantor shall mark
such note or negotiable instrument with a legend that the same is subject to
this subordination. Without limiting the generality of the foregoing, each
Subsidiary Guarantor hereby agrees with the Guaranteed Creditors that it will
not exercise any right of subrogation which it may at any time otherwise have as
a result of this Subsidiary Guarantee (whether contractual, under Section 509 of
the Bankruptcy Code or otherwise) until all Guaranteed Obligations have been
irrevocably paid in full in cash.

          13.08 Waiver. (a) Each Subsidiary Guarantor waives any right (except
as shall be required by applicable statute and cannot be waived) to require any
Guaranteed Creditor to

                                      -119-
<PAGE>
(i) proceed against the Borrowers, any other Guarantor, any other guarantor or
any other party, (ii) proceed against or exhaust any security held from the
Borrowers, any other Guarantor, any other guarantor or any other party or (iii)
pursue any other remedy in any Guaranteed Creditor's power whatsoever. Each
Subsidiary Guarantor waives any defense based on or arising out of any defense
of the Borrowers, any other Guarantor, any other guarantor or any other party,
other than payment in full of the Guaranteed Obligations, based on or arising
out of the disability of the Borrowers, any other Guarantor, any other guarantor
or any other party, or the unenforceability of the Guaranteed Obligations or any
part thereof from any cause, or the cessation from any cause of the liability of
the Borrowers other than payment in full of the Guaranteed Obligations. The
Guaranteed Creditors may, at their election, foreclose on any security held by
the Agent, the Collateral Agent or any other Guaranteed Creditor by one or more
judicial or nonjudicial sales, whether or not every aspect of any such sale is
commercially reasonable (to the extent such sale is permitted by applicable
law), or exercise any other right or remedy the Guaranteed Creditors may have
against the Borrowers or any other party, or any security, without affecting or
impairing in any way the liability of any Subsidiary Guarantor hereunder except
to the extent the Guaranteed Obligations have been paid. Each Subsidiary
Guarantor waives any defense arising out of any such election by the Guaranteed
Creditors, even though such election operates to impair or extinguish any right
of reimbursement or subrogation or other right or remedy of such Subsidiary
Guarantor against the Borrowers or any other party or any security.

          (b) Each Subsidiary Guarantor waives all presentments, demands for
performance, protests and notices, including, without limitation, notices of
nonperformance, notices of protest, notices of dishonor, notices of acceptance
of this Subsidiary Guarantee, and notices of the existence, creation or
incurring of new or additional Guaranteed Obligations. Each Subsidiary Guarantor
assumes all responsibility for being and keeping itself informed of the
Borrowers' financial condition and assets, and of all other circumstances
bearing upon the risk of nonpayment of the Guaranteed Obligations and the
nature, scope and extent of the risks which each Subsidiary Guarantor assumes
and incurs hereunder, and agrees that the Guaranteed Creditors shall have no
duty to advise any Subsidiary Guarantor of information known to them regarding
such circumstances or risks.

                                       S-1
<PAGE>
          IN WITNESS WHEREOF, the parties hereto have caused their duly
authorized officers to execute and deliver this Agreement as of the date first
above written.

Address for all Credit Parties:      DI INDUSTRIES, INC.             
                                     as Borrower
450 Gears Road                     
Houston, Texas 77067                 By /s/ T. SCOTT O'KEEFE
Telephone No.:  (713) 874-0202              T. Scott O'Keefe
Facsimile No.:  (713) 874-0195       Title: Senior Vice President, Chief 
                                            Financial Officer, and Secretary
                                   
                                     DRILLERS, INC.
                                       as Borrower
                                   
                                     By /s/ T. SCOTT O'KEEFE                 
                                            T. Scott O'Keefe                 
                                     Title: Senior Vice President, Chief     
                                            Financial Officer, and Secretary
                                     
                                     DI INTERNATIONAL, INC.
                                       as Guarantor
                                   
                                     By /s/ T. SCOTT O'KEEFE                
                                            T. Scott O'Keefe                
                                     Title: Senior Vice President, Chief    
                                            Financial Officer, and Secretary
                                     
                                     BANKERS TRUST COMPANY,
                                     Individually and as Agent
                                   
                                     By /s/ MARY ZADROGA
                                            Mary Zadroga
                                     Title: Vice President
                                   
                                     ING (US) CAPITAL CORPORATION,
                                     Individually and as Co-Agent
                                   
                                     By /s/ FRANK P. FENERA
                                            Frank P. Fenera
                                     Title: Associate
<PAGE>
                                                                         ANNEX I
                                                                         -------

                LIST OF LENDERS AND COMMITMENTS
                -------------------------------
                                                                       Revolving
Lender                                        Loan Commitment
- -----                                         ---------------

Bankers Trust Company                            $14,000,000
ING (US) Capital Corporation                      14,000,000
NordlandsBanken AS                                 7,000,000
                                                 -----------

Total:                                           $35,000,000
<PAGE>
                                                                        ANNEX II
                                                                        --------
                                LENDER ADDRESSES
                                ----------------

Lender                       Address

Bankers Trust Company        130 Liberty Street
                             New York, New York  10006
                             Attention:  James T. Cullen
                             Telephone No.:  (212) 250-7343
                             Facsimile No.:  (212) 250-6029

ING (US) Capital Corporation 135 East 57th Street
                             New York, New York  10022
                             Attention:  Frank Ferrara
                             Telephone No.:  (212) 409-1733
                             Facsimile No.:  (212) 832-3616

NordlandsBanken AS           Postboks 1213 Vika,
                             0110 Oslo, Norway
                             Attention:  Torre Formo
                             Telephone No.:  011-47-22-
                             Facsimile No.:  011-47-22-33-67-10
<PAGE>
                                                                     EXHIBIT A-1
                                                                     -----------

                           FORM OF NOTICE OF BORROWING
                           ---------------------------

                                                                          [Date]

Bankers Trust Company, as Agent and ING (US) Capital Corporation, as Co-Agent
 for the Banks party to the Credit Agreement referred to below
c/o Bankers Trust Company
One Bankers Trust Plaza
New York, New York  10006

Attention:

Ladies and Gentlemen:

          The undersigned, DI Industries, Inc., a Texas corporation (the
"Company"), Drillers, Inc., a Texas corporation ("DI" and together with the
Company, the "Borrowers"), refers to the Senior Secured Reducing Revolving
Credit Agreement, dated as of December , 1996 (as amended, modified or
supplemented from time to time, the "Credit Agreement," the terms defined
therein being used herein as therein defined), among the Borrowers, each of the
Subsidiary Guarantors a party thereto, the lenders from time to time party
thereto (the "Banks"), ING (US) Capital Corporation as Co-Agent, and Bankers
Trust Company, as Agent for such Banks, and subject to the terms of Sections
1.10 of the Credit Agreement, hereby gives you, the Agent and Co-Agent,
irrevocable notice, pursuant to Section 1.03(a) of the Credit Agreement, that
the undersigned hereby request a Borrowing of Revolving Loans under the Credit
Agreement, and in that connection sets forth below the information relating to
such Borrowing (the "Proposed Borrowing") as required by Section 1.03(a) of the
Credit Agreement:

        (i) The Business Day of the Proposed Borrowing is
          , 19  .1
- -------------------------
1    Shall be a Business Day at least one Business Day in the case of Base Rate
     Loans and two Business Days in the case of Eurodollar Loans, in each case,
     after the date hereof.
<PAGE>
                                       -2-

       (ii) The aggregate principal amount of the Proposed Borrowing is $      .

      (iii) The Revolving Loans to be made pursuant to the Proposed Borrowing
shall be initially maintained as [Base Rate Loans] [Eurodollar Loans].

      [(iv) The initial Interest Period for the Proposed Borrowing is [one
month] [two months] [three months] [six months].]2

          The undersigned hereby certify that the following statements are true
on the date hereof, and will be true on the date of the Proposed Borrowing:

        (A) the representations and warranties contained in the Credit Agreement
and in the other Credit Documents are and will be true and correct in all
material respects, both before and after giving effect to the Proposed Borrowing
and to the application of the proceeds thereof, as though made on such date,
unless stated to relate to a specific earlier date, in which case such
representations and warranties shall be true and correct in all material
respects as of such earlier date; and

        (B) no Default or Event of Default has occurred and is continuing, or
would result from such Proposed Borrowing or from the application of the
proceeds thereof.

- -------------------------
2    To be included for a Proposed Borrowing of Eurodollar
     Loans.
<PAGE>
                                       -3-

                                   Very truly yours,

                                   DI INDUSTRIES, INC.

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

                                   DRILLERS, INC.

                                   By
                                        ----------------------
                                        Title:
<PAGE>
                                                                     Exhibit A-2

               FORM OF LETTER OF CREDIT REQUEST
               --------------------------------

TO:  Bankers Trust Company, as agent (the "Agent") and ING (US) Capital
     Corporation, as co-agent (the "Co-Agent") under that certain Senior Secured
     Reducing Revolving Credit Agreement dated as of December , 1996 (as
     amended, modified or supplemented from time to time, the "Credit
     Agreement") by and among DI Industries, Inc., a Texas corporation (the
     "Company"), Drillers, Inc., a Texas corpora- tion ("DI" and together with
     the Company, the "Borrowers"), each of the Subsidiary Guaran- tors a party
     thereto, the lenders from time to time party thereto (the "Banks"), the
     Agent and the Co-Agent. Capitalized terms used herein without definition
     shall have the meanings given to such terms in the Credit Agreement.

Ladies and Gentlemen:

          Pursuant to Sections 2.01 and 2.02 of the Credit Agreement, the
Company hereby requests the issuance of a Letter of Credit for the account of
[the Company/DI] on [_____________, 199_]1. In connection with this Letter of
Credit Request for issuance, the undersigned is providing the Agent with the
following information:

     1.   Stated Amount of Letter of Credit: __________________

     2.   Expiration Date of Letter of Credit: ________________

     3.   Name of Beneficiary: ________________________________

     4.   Address of Beneficiary: _____________________________

- -------------------
1    Insert proposed date of issuance.
<PAGE>
                                       -2-

          The undersigned officer of [the Company/DI] does hereby certify that
each of the applicable conditions precedent set forth in Article 5 of the Credit
Agreement have been and will be satisfied as of the date of making of this
Letter of Credit.

DATED:

                                   DI INDUSTRIES, INC./
                                    DRILLERS, INC.

                                   By:
                                        -----------------------
                                        Name:
                                        Title:
<PAGE>
                                                                       EXHIBIT B

                             FORM OF REVOLVING NOTE
                             ----------------------

$                                            New York, New York
                                              December   , 1996

          FOR VALUE RECEIVED, DI INDUSTRIES, INC., a Texas corporation (the
"Company"), DRILLERS, INC., a Texas corporation ("DI" and together with the
Company, the "Borrowers"), hereby promise to pay to [Name of Bank] or its
registered assigns (the "Bank"), in lawful money of the United States of America
in immediately available funds, at the office of Bankers Trust Company (the
"Agent") located at One Bankers Trust Plaza, New York, New York 10006 on the
Final Maturity Date (as defined in the Agreement referred to below) the
principal sum of ________ DOLLARS ($ ) or, if less, the unpaid principal amount
of all Revolving Loans (as defined in the Agreement) made by the Bank pursuant
to the Agreement.

          The Borrowers promise also to pay interest on the unpaid principal
amount hereof in like money at said office from the date hereof until paid at
the rates and at the times provided in Section 1.08 of the Agreement.

          This Note is one of the Revolving Notes referred to in the Senior
Secured Reducing Revolving Credit Agreement, dated as of December , 1996, among
the Borrowers, each of the Subsidiary Guarantors a party thereto, the lenders
from time to time party thereto (including the Bank), the Agent and ING (US)
Capital Corporation as Co-Agent (as amended, modified or supplemented from time
to time, the "Agreement") and is issued pursuant to and entitled to the benefits
thereof and of the other Credit Documents (as defined in the Agreement). This
Note is secured by the Security Documents (as defined in the Agreement) and is
entitled to the benefits of the Guaranties (as defined in the Agreement). This
Note is subject to voluntary prepayment and mandatory repayment prior to the
Final Maturity Date, in whole or in part, as provided in the Agreement, and
Revolving Loans may be converted from one Type (as defined in Agreement) into
another Type to the extent provided in the Agreement.

          In case an Event of Default (as defined in the Agreement) shall occur
and be continuing, the principal of and accrued interest on this Note may become
or be declared to be
<PAGE>
                                       -2-

due and payable in the manner and with the effect provided in the Agreement.

          The Borrowers hereby waive presentment, demand, protest or notice of
any kind in connection with this Note.

          THIS NOTE SHALL BE CONSTRUED IN ACCORDANCE WITH AND BE GOVERNED BY THE
LAW OF THE STATE OF NEW YORK.

                                   DI INDUSTRIES, INC.

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

                                   DRILLERS, INC.

                                   By
                                        ----------------------
                                        Title:
<PAGE>
                                                                       EXHIBIT C

            FORM OF SECTION 4.04(b)(ii) CERTIFICATE
            ---------------------------------------

          Reference is hereby made to the Senior Secured Reducing Revolving
Credit Agreement, dated as of December , 1996, among DI Industries, Inc., a
Texas corporation (the "Company"), Drillers, Inc., a Texas corporation ("DI" and
together with the Company, the "Borrowers"), each of the Subsidiary Guarantors a
party thereto, the lenders from time to time party thereto, Bankers Trust
Company, as Agent and ING (US) Capital Corporation, as Co-Agent (as amended,
modified or supplemented from time to time, the "Credit Agreement"). Pursuant to
the provisions of Section 4.04(b)(ii) of the Credit Agreement, the undersigned
hereby certifies that it is not a "bank" within the meaning of Section
881(c)(3)(A) of the Internal Revenue Code of 1986, as amended.

                                   [NAME OF BANK]

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

Date:         ,
     --------  -----
<PAGE>
                                                                       EXHIBIT E
                                                                       ---------
                          FORM OF OFFICERS' CERTIFICATE
                          -----------------------------

          I, the undersigned, [President/Vice President] of DI Industries, Inc.,
a corporation organized and existing under the laws of the State of Texas (the
"Company"), and Drillers, Inc., a corporation organized and existing under the
laws of the State of Texas ("DI" and together with the Company, the "Borrowers")
do hereby certify on behalf of the Borrowers that:

          1. This Certificate is furnished pursuant to the Senior Secured
Reducing Revolving Credit Agreement, dated as of December , 1996, among the
Borrowers, each of the Subsidiary Guarantors a party thereto, the lenders from
time to time party thereto, ING (US) Capital Corporation as Co-Agent and Bankers
Trust Company, as Agent (such Credit Agreement, as in effect on the date of this
Certificate, being herein called the "Credit Agreement"). Unless otherwise
defined herein, capitalized terms used in this Certificate shall have the
meanings set forth in the Credit Agreement.

          2. The following named individuals are elected officers of the
Borrowers, each holds the office of the Borrowers set forth opposite his name
and has held such office since _____, 19__.1 The signature written opposite the
name and title of each such officer is his genuine signature.

        Name2              Office             Signature
     ----------          -----------         -----------

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

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

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

          3. Attached hereto as Exhibit A-1 is a certified copy of the
Certificate of Incorporation of the Company, as
- -------------------------
1    Insert a date prior to the time of any corporate action relating to the
     Credit Documents or related documentation.

2    Include name, office and signature of each officer who will sign any Credit
     Document, including the officer who will sign the certification at the end
     of this Certificate or related documentation.
<PAGE>
                                       -2-

filed in the Office of the Secretary of State of the State of Texas on ________,
19__, together with all amendments thereto adopted through the date hereof.
Attached hereto as Exhibit A-2 is a certified copy of the Certificate of
Incorporation of DI, as filed in the Office of the Secretary of State of the
State of Texas on ________, 19__, together with all amendments thereto adopted
through the date hereof.

          4. Attached hereto as Exhibit B-1 is a true and correct copy of the
By-Laws of the Company which were duly adopted, are in full force and effect on
the date hereof, and have been in effect since _________, 19__. Attached hereto
as Exhibit B-2 is a true and correct copy of the By-Laws of DI which were duly
adopted, are in full force and effect on the date hereof, and have been in
effect since _________, 19__.

          5. Attached hereto as Exhibit C-1 is a true and correct copy of
resolutions which were duly adopted on ______, 19__ [by unanimous written
consent of the Board of Directors of the Company] [by a meeting of the Board of
Directors of the Company at which a quorum was present and acting throughout],
and said resolutions have not been rescinded, amended or modified. Except as
attached hereto as Exhibit C-1, no resolutions have been adopted by the Board of
Directors of the Company which deal with the execution, delivery or performance
of any of the Documents to which the Company is party. Attached hereto as
Exhibit C-2 is a true and correct copy of resolutions which were duly adopted on
______, 19__ [by unanimous written consent of the Board of Directors of DI] [by
a meeting of the Board of Directors of DI at which a quorum was present and
acting throughout], and said resolutions have not been rescinded, amended or
modified. Except as attached hereto as Exhibit C-2, no resolutions have been
adopted by the Board of Directors of DI which deal with the execution, delivery
or performance of any of the Documents to which DI is party.

          6. On the date hereof, all of the applicable conditions set forth in
Sections 5.02, 5.06, 5.07, 5.08, 5.09, 5.10 and 5.14 of the Credit Agreement
have been satisfied.

          7. On the date hereof, the representations and warranties contained in
the Credit Agreement and in the other Credit Documents to which the Borrowers
are a party are true and correct in all material respects with the same effect
as though such representations and warranties had been made on the date hereof,
both before and after giving effect to the
<PAGE>
                                       -3-

incurrence of Loans on the date hereof and the application of the proceeds
thereof.

          8. On the date hereof, no Default or Event of Default has occurred and
is continuing or would result from the Borrowing to occur on the date hereof or
from the application of the proceeds thereof.

          9. There are no proceedings for the dissolution or liquidation of
either the Company or DI.
<PAGE>
                                       -4-

          IN WITNESS WHEREOF, I have hereunto set my hand this ___ day of
December, 1996.

                              DI INDUSTRIES, INC.

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

                              DRILLERS, INC.

                              --------------------------------
                                      Name:
                                     Title:
<PAGE>
                                       -5-

I, the undersigned, [ ] of the Company and of DI, do hereby certify on behalf of
the Company and DI that [ ] is the duly elected and qualified [ ] of the Company
and of DI and the signature above is his genuine signature.

          IN WITNESS WHEREOF, I have hereunto set my hand this ____ day of
_______________, 1996.

                              DI INDUSTRIES, INC.
                              DRILLERS, INC.

                              --------------------------------
                                      Name:
                                     Title:
<PAGE>
                                               Exhibit F to
                                               Credit Agreement

                                PLEDGE AGREEMENT

          PLEDGE AGREEMENT (the "Agreement"), dated as of December 31, 1996,
made by DI INDUSTRIES, INC. (the "Company") and DRILLERS, INC. ("DI")
(collectively the "Borrowers"), each Texas corporations, and DI INTERNATIONAL,
INC. (the "Subsidiary Pledgor"; together with the Borrowers, the "Pledgors") in
favor of BANKERS TRUST COMPANY, a New York banking corporation having an office
at One Bankers Trust Plaza, New York, New York 10006, as Collateral Agent, as
pledgee, assignee and secured party, in its capacity as collateral agent (in
such capacities and together with any successors in such capacities, "Collateral
Agent") for the Banks (as hereinafter defined).

                       R E C I T A L S :

          A. The Company owns, directly or through its Subsidiaries (as defined
in the Credit Agreement referred to below), all of the issued and outstanding
stock of DI and the Subsidiary Pledgor.

          B.  Each Pledgor is the owner of the Pledged Collat-
eral (as hereinafter defined) pledged by it pursuant to this
Agreement.

          C. The Pledgors, certain financial institutions (collectively, the
"Banks"), Bankers Trust Company, as Agent and Administrative Agent, and ING (US)
Capital Corporation, as Co-Agent are entering into a certain revolving credit
agreement (the "Credit Agreement"; capitalized terms used herein and not defined
shall have the meaning assigned to such terms in the Credit Agreement), dated as
of the date hereof, pursuant to which the Banks agreed to (i) extend to or for
the account of the Borrowers certain Revolving Loans in an aggregate principal
amount not to exceed $35,000,000.00 and (ii) issue to or for the account of the
Borrowers Letters of Credit.

          D. Each of the Borrowers and the Subsidiary Pledgor are, as of the
date hereof, executing the Credit Agreement pursuant to which, among other
things, the Subsidiary Pledgor will guarantee the obligations of the Borrowers
under the Credit Agreement and the other Credit Documents.

          E. Each of the Borrowers and the Subsidiary Pledgor expects to receive
substantial benefit from the execution, delivery and performance of the Credit
Agreement and has agreed to grant to the Collateral Agent, liens and security
interests
<PAGE>
                                       -2-

in the Pledged Collateral owned by it to secure the Secured Obligations (as
hereinafter defined).

          F. It is a condition to the obligations of the Banks to make the Loans
under the Credit Agreement and to issue Letters of Credit that the Borrowers and
the Subsidiary Pledgor execute and deliver the applicable Credit Documents,
including this Agreement.

                      A G R E E M E N T :

          NOW, THEREFORE, in consideration of the foregoing premises and other
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, each Pledgor and Collateral Agent hereby agree as follows:

          Section 1. Pledge. As collateral security for the payment and
performance when due of all the Secured Obligations, each Pledgor hereby
pledges, assigns, transfers and grants to Collateral Agent for its benefit and
the benefit of the Secured Parties (as hereinafter defined), a continuing first
priority security interest in and to all of the right, title and interest of
such Pledgor in, to and under the following property, whether now existing or
hereafter acquired, (collectively, the "Pledged Collateral"):

          (a) all issued and outstanding shares of capital stock of each Person
     described on Schedule A hereto (the "Pledged Stock") (which are and shall,
     subject to Section 4(b) hereof, remain at all times until this Agreement
     terminates, certificated shares), including the certificates representing
     the Pledged Stock and any interest of any Pledgor in the entries on the
     books of any financial intermediary pertaining to the Pledged Stock;

          (b) all additional shares of capital stock of any issuer of the
     Pledged Stock from time to time acquired by any Pledgor in any manner
     (which are and shall, subject to Section 4(b) hereof, remain at all times
     until this Agreement terminates, certificated shares) (which shares shall,
     upon acquisition, be deemed to be part of the Pledged Stock), including the
     certificates representing such additional shares and any interest of any
     Pledgor in the entries on the books of any financial intermediary
     pertaining to such additional shares;

          (c) all member interests in Indrillers L.L.C., a Michigan limited
     liability company, held by DI, together with all rights, privileges,
     authority and powers of DI in
<PAGE>
                                       -3-

     and to Indrillers L.L.C. or under the membership agreement
     of Indrillers L.L.C. (the "Membership Agreement") (collec-
     tively, the "Initial Pledged Interest"), and the certifi-
     cates, instruments and agreements, if any, representing
     the Initial Pledged Interest;

          (d) all options, warrants, rights, agreements, additional membership
     interests or other interests relating to Indrillers L.L.C. or any interest
     in Indrillers L.L.C., including, without limitation, any right relating to
     the equity or membership interests in Indrillers L.L.C. or under the
     Membership Agreement (collectively, the "Additional Interests"; together
     with the Initial Pledged Interest, the "Pledged Interest"; the Pledged
     Interest and the Pledged Stock, collectively, the "Pledged Securities")
     from time to time acquired by Pledgor in any manner and the certificates,
     instruments and agreements, if any, representing the Additional Interests;

          (e) all intercompany notes now owned or held by any Pledgor and from
     time to time acquired by any Pledgor in any way, including the intercompany
     notes described on Schedule B hereto (collectively, the "Intercompany
     Notes") and all certificates or instruments evidencing such Intercompany
     Notes and all proceeds thereof, all accessions thereto and substitutions
     therefore;

          (f) all dividends, cash, options, warrants, rights, instruments,
     distributions, returns of capital, income, profits and other property,
     interests or proceeds from time to time received, receivable or otherwise
     distributed to any Pledgor in respect of or in exchange for any or all of
     the Pledged Securities or Intercompany Notes (collectively,
     "Distributions"); and

          (g) all Proceeds (as defined under the Uniform Commercial Code as in
     effect in any relevant jurisdiction (the "Code") or under other relevant
     law) of any of the foregoing, and in any event, including, without
     limitation, any and all (i) proceeds of any insurance (except payments made
     to a Person which is not a party to this Agreement), indemnity, warranty or
     guarantee payable to Collateral Agent or to any Pledgor from time to time
     with respect to any of the Pledged Collateral, (ii) payments (in any form
     whatsoever) made or due and payable to any Pledgor from time to time in
     connection with any requisition, confiscation, condemnation, seizure or
     forfeiture of all or any part of the Pledged Collateral by any Governmental
     Authority (or any person acting under color of a Governmental Authority),
     (iii) instruments representing
<PAGE>
                                       -4-

     obligations to pay amounts in respect of Pledged Securities or Intercompany
     Notes, (iv) products of the Pledged Collateral, and (v) other amounts from
     time to time paid or payable under or in connection with any of the Pledged
     Collateral.

          Section 2. Secured Obligations. This Agreement is entered into by each
Pledgor in favor of Collateral Agent, for its benefit and the benefit of the
Banks, the Agent and the Co-Agent (collectively, the "Secured Parties") to
secure the payment and performance in full when due, whether at stated maturity,
by acceleration or otherwise (including, without limitation, the payment of
interest and other amounts which would accrue and become due but for the filing
of a petition in bankruptcy or the operation of the automatic stay under Section
362(a) of the Bankruptcy Code, 11 U.S.C. { 362(a)) of (i) all obligations of the
Pledgors now or hereafter existing under or in respect of the Credit Agreement;
(ii) all obligations of the Pledgors now or hereafter existing under or in
respect of this Agreement or any other Security Document and (iii) all interest,
charges, fees, costs, expenses, reimbursements, premiums, indemnities and other
payments of any kind or nature in respect of amounts or instruments referred to
in any of clauses (i) and (ii) (the obligations described in clauses (i) through
(iii), collectively, the "Secured Obligations").

          Section 3. No Release. Nothing set forth in this Agreement shall
relieve any Pledgor from the performance of any term, covenant, condition or
agreement on such Pledgor's part to be performed or observed under or in respect
of any of the Pledged Collateral or from any liability to any Person under or in
respect of any of the Pledged Collateral or shall impose any obligation on
Collateral Agent or any Secured Party to perform or observe any such term,
covenant, condition or agreement on such Pledgor's part to be so performed or
observed or shall impose any liability on Collateral Agent or any Secured Party
for any act or omission on the part of any Pledgor relating thereto or for any
breach of any representation or warranty on the part of any Pledgor contained in
this Agreement or any other Credit Document or under or in respect of the
Pledged Collateral or made in connection herewith or therewith.

          Section 4.  Delivery of Pledged Collateral.

          (a) All certificates, agreements or instruments rep- resenting or
evidencing the Pledged Collateral, to the extent not previously delivered to
Collateral Agent, shall immediately upon receipt thereof by any Pledgor be
delivered to and held by or on behalf of Collateral Agent pursuant hereto. All
Pledged
<PAGE>
                                       -5-

Collateral shall be in suitable form for transfer by delivery or shall be
accompanied by duly executed instruments of transfer or assignment in blank, all
in form and substance reasonably satisfactory to Collateral Agent. Collateral
Agent shall have the right, at any time upon the occurrence of an Event of
Default and without notice to any Pledgor, to endorse, assign or otherwise
transfer to or to register in the name of Collateral Agent or any of its
nominees any or all of the Pledged Collateral. In addition, Collateral Agent
shall have the right at any time to exchange certificates representing or
evidencing Pledged Collateral for certificates of smaller or larger
denominations.

          (b) If the issuer of any Pledged Securities is organized in a
jurisdiction which does not permit the use of certificates to evidence equity
ownership, or if any of the Pledged Securites are not evidenced by certificates
of ownership, then the Pledgor that pledged such Pledged Securities shall, to
the extent permitted by applicable law, record such pledge on the stock register
or books of the issuer, execute any customary stock pledge forms or other
documents necessary or appropriate to complete the pledge and give Collateral
Agent the right to transfer such Pledged Securities under the terms hereof and
provide to Collateral Agent an opinion of counsel, in form and substance
reasonably satisfactory to Collateral Agent, confirming such pledge.

          Section 5.  Supplements, Further Assurances.

          (a) Each Pledgor agrees that at any time and from time to time, at its
sole cost and expense, it shall promptly execute and deliver all further
instruments and documents, including, without limitation, supplemental or
additional UCC-1 financing statements, and take all further action that may be
necessary or that Collateral Agent may reasonably request, in order to perfect
and protect the pledge, security interest and Lien granted or purported to be
granted hereby or to enable Collateral Agent to exercise and enforce its rights
and remedies hereunder with respect to any Pledged Collateral.

          (b) Each Pledgor shall, upon obtaining any Pledged Securities or
Intercompany Notes of any Person, promptly (and in any event within five
Business Days) deliver to Collateral Agent a pledge amendment, duly executed by
such Pledgor, in substantially the form of Exhibit 1 hereto (each, a "Pledge
Amendment"), in respect of the additional Pledged Securities or Intercompany
Notes which are to be pledged pursuant to this Agreement, and confirming the
attachment of the Lien hereby created on and in respect of such additional
shares. Each Pledgor hereby authorizes Collateral Agent to attach each
<PAGE>
                                       -6-

Pledge Amendment to this Agreement and agrees that all Pledged Securities or
Intercompany Notes listed on any Pledge Amendment delivered to Collateral Agent
shall for all purposes hereunder be considered Pledged Collateral.

          Section 6. Representations, Warranties and Covenants. Each Pledgor
represents, warrants or covenants (as applicable), after giving effect to the
Transaction and the repayment of the Indebtedness incurred under the Existing
Credit Agreement, as follows (as to itself only, except that Borrower represents
and warrants as to itself and each of the Subsidiary Pledgors):

          (a) No Liens. Such Pledgor is, and at the time of any delivery of any
     Pledged Collateral to Collateral Agent pursuant to Section 4 of this
     Agreement will be, the sole legal and beneficial owner of the Pledged
     Collateral pledged by it. All Pledged Collateral pledged by it is on the
     date hereof, and will be, so owned by such Pledgor free and clear of any
     Lien except for the Lien created by this Agreement.

          (b) No Consents, etc. No consent of any party (including, without
     limitation, stockholders or creditors of such Pledgor) and no consent,
     authorization, approval, or other action by, and no notice to or filing
     with, any Governmental Authority or regulatory body or other Person (other
     than those consents or approvals which have been obtained as of the date
     hereof) is required (x) for the execution, delivery or performance of this
     Agreement by such Pledgor or for the pledge by such Pledgor of the Pledged
     Collateral pursuant to this Agreement, or (y) for the exercise by
     Collateral Agent of the voting or other rights provided for in this
     Agreement (other than any such consent, approval or action required to be
     taken by the Collateral Agent), or (z) for the exercise by Collateral Agent
     of the remedies in respect of the Pledged Collateral pursuant to this
     Agreement (other than any such consent, approval or action required to be
     taken by the Collateral Agent).

          (c) Due Authorization and Issuance. All of the Pledged Shares pledged
     by it have been, and to the extent hereafter issued will be upon such
     issuance, duly authorized and validly issued and fully paid and
     nonassessable to the extent permitted by applicable law. DI has fully paid
     for the Initial Pledged Interest and there is no amount or other obligation
     on the part of DI owing to Indrillers L.L.C. in exchange for or in
     connection with
<PAGE>
                                       -7-

     the issuance of the Initial Pledged Interest or DI's sta- tus as a member
     of Indrillers L.L.C.

          (d) Chief Executive Office. Such Pledgor's chief executive office is
     located at the location indicated on Schedule C hereto. No Pledgor shall
     move its chief executive office except to such new location as such Pledgor
     may establish in accordance with the last sentence of this Section 6(e). No
     Pledgor shall establish a new location for its chief executive office or
     shall it change its name until (i) it shall have given Collateral Agent not
     less than 30 days' prior written notice of its intention to do so, clearly
     describing such new location or name and providing such other information
     in connection therewith as Collateral Agent or any Secured Party may
     reasonably request, and (ii) with respect to such new location or name,
     such Pledgor shall have taken all action satisfactory to Collateral Agent
     and the Secured Parties to maintain the perfection and priority of the
     security interest in the Pledged Collateral intended to be granted hereby.

          (e) Delivery of Pledged Collateral; Filings. Such Pledgor has
     delivered (or in the case of Pledged Securities acquired by such Pledgor
     after the date hereof, such Pledgor will have delivered) to Collateral
     Agent all certificates representing the Pledged Securities and Intercompany
     Notes intended to be pledged pursuant to this Agreement and has caused to
     be filed with the Secretary of State of the State of New York and the State
     indicated on Schedule C hereto, the State in which the chief executive
     office of such Pledgor is located, UCC-1 financing statements evidencing
     the Lien created by this Agreement, and such delivery, filing and pledge of
     the Pledged Collateral pursuant to this Agreement creates a valid and
     perfected first priority security interest in the Pledged Collateral
     securing the payment of the Secured Obligations pursuant to the Code in
     effect in each applicable jurisdiction, including, without limitation, the
     State of New York and the State indicated on Schedule C hereto.

          (f) Pledged Collateral. All information set forth herein, including
     the Schedules annexed hereto, relating to the Pledged Collateral pledged by
     it is accurate and complete in all respects. DI represents that the Initial
     Pledged Interest constitutes 65% of the equity interests in Indrillers
     L.L.C.

          (g) No Violations, etc. The pledge of the Pledged Collateral pledged
     by it pursuant to this Agreement does
<PAGE>
                                       -8-

     not violate Regulation G, T, U or X of the Federal Reserve Board.

          (h) Ownership of Pledged Collateral. Except as otherwise permitted by
     the Credit Agreement, such Pledgor at all times will be the sole beneficial
     owner of the Pledged Collateral pledged by it.

          (i) No Options, Warrants, etc. There are no options, warrants, calls,
     rights, commitments or agreements of any character to which such Pledgor is
     a party or by which it is bound obligating such Pledgor to issue, deliver
     or sell or cause to be issued, delivered or sold, additional Pledged
     Securities or obligating such Pledgor to grant, extend or enter into any
     such option, warrant, call, right, commitment or agreement. There are no
     voting trusts or other agreements or understandings to which such Pledgor
     is a party with respect to the voting of the capital stock of any issuer of
     the Pledged Securities pledged by it.

          (j) Partnership Agreement. DI has delivered to Collateral Agent a
     true, correct and complete copy of the Membership Agreement. The Membership
     Agreement is in full force and effect, has not as of the date hereof, been
     amended or modified and there is no existing default by any party
     thereunder or any event which, with the giving of notice or passage of time
     or both, would constitute a default by any party thereunder. DI shall
     deliver to Collateral Agent a copy of any notice of default given or
     received by it under the Membership Agreement within ten (10) days after DI
     gives or receives such notice. DI will not terminate or agree to terminate
     the Membership Agreement or make any amendment or modification to the
     Membership Agreement which may have a material adverse effect on the value
     of the Pledged Collateral or an adverse effect on the security intended to
     be provided by this Agreement except as permitted by the Credot Agreement.


          Section 7.  Voting Rights; Distributions; etc.

          (a) So long as no Event of Default shall have occurred and be
continuing:

          (i) each Pledgor shall be entitled to exercise any and all voting and
     other consensual rights pertaining to the Pledged Securities or any part
     thereof for any purpose not inconsistent with the terms or purpose of this
     Agreement or any other Credit Document; provided, however, that
<PAGE>
                                       -9-

     such Pledgor shall not in any event exercise such rights in any manner
     which could reasonably be expected to have an adverse effect on the value
     of the Pledged Collateral pledged by it or the security intended to be
     provided by this Agreement.

         (ii) Subject to the terms of the Credit Agreement, each Pledgor shall
     be entitled to receive and retain, and to utilize free and clear of the
     Lien of this Agreement, any and all Distributions, but only if and to the
     extent made in accordance with the provisions of the Credit Agreement;
     provided, however, that any and all such Distributions consisting of rights
     or interests in the form of securities shall be, and shall be forthwith
     delivered to Collateral Agent to hold as Pledged Collateral and shall, if
     received by any Pledgor, be received in trust for the benefit of Collateral
     Agent, be segregated from the other property or funds of such Pledgor, and
     be forthwith delivered to Collateral Agent as Pledged Collateral in the
     same form as so received (with any necessary endorsement).

        (iii) Collateral Agent shall be deemed without further action or
     formality to have granted to each Pledgor all necessary consents relating
     to voting rights and shall, if necessary, upon written request of any
     Pledgor and at such Pledgor's sole cost and expense, from time to time
     execute and deliver (or cause to be executed and delivered) to such Pledgor
     all such instruments as such Pledgor may reasonably request in order to
     permit such Pledgor to exercise the voting and other rights which it is
     entitled to exercise pursuant to Section 7(a)(i) hereof and to receive the
     Distributions which it is authorized to receive and retain pursuant to
     Section 7(a)(ii) hereof.

          (b)  Upon the occurrence and during the continuance
of an Event of Default:

          (i) All rights of each Pledgor to exercise the voting and other
     consensual rights it would otherwise be entitled to exercise pursuant to
     Section 7(a)(i) hereof without any action or the giving of any notice shall
     cease, and all such rights shall thereupon become vested in Collateral
     Agent (for so long as such Event of Default shall be continuing), which
     shall thereupon have the sole right to exercise such voting and other
     consensual rights.

         (ii) All rights of each Pledgor to receive Distributions which it would
     otherwise be authorized to receive and retain pursuant to Section 7(a)(ii)
     hereof shall cease
<PAGE>
                                      -10-

     and all such rights shall thereupon become vested in Collateral Agent (for
     so long as such Event of Default shall be continuing), which shall
     thereupon have the sole right to receive and hold as Pledged Collateral
     such Distributions.

          (c) Each Pledgor shall, at its sole cost and expense, from time to
time execute and deliver to Collateral Agent appropriate instruments as
Collateral Agent may reasonably request in order to permit Collateral Agent to
exercise the voting and other rights which it may be entitled to exercise
pursuant to Section 7(b)(i) hereof and to receive all Distributions which it may
be entitled to receive under Section 7(b)(ii) hereof.

          (d) All Distributions which are received by any Pledgor contrary to
the provisions of Section 7(b)(ii) hereof shall be received in trust for the
benefit of Collateral Agent, shall be segregated from other funds of such
Pledgor and shall immediately be paid over to Collateral Agent as Pledged
Collateral in the same form as so received (with any necessary endorsement).

          Section 8. Transfers and Other Liens; Additional Shares.

          (a) No Pledgor shall (i) sell, convey, assign or otherwise dispose of,
or grant any option, right or warrant with respect to, any of the Pledged
Collateral pledged by it except as permitted by the Credit Agreement, (ii)
create or permit to exist any Lien upon or with respect to any Pledged
Collateral pledged by it other than the Lien and security interest granted to
Collateral Agent under this Agreement, or (iii) except as permitted by the
Credit Agreement, permit the issuer of any Pledged Securities pledged by it to
merge, consolidate or change its legal form, unless all of the outstanding
capital stock or membership interests of the surviving or resulting entity is,
upon such merger or consolidation, pledged hereunder and no cash, securities or
other property is distributed in respect of the outstanding shares or membership
interests of any other constituent entity.

          (b) Each Pledgor shall (i) cause each issuer of the Pledged Securities
pledged by it not to issue any stock or other securities or equity interests in
addition to or in substitution for the Pledged Securities issued by such issuer,
except to such Pledgor and (ii) pledge hereunder, immediately upon its
acquisition (directly or indirectly) thereof, any and all additional shares of
capital stock or other equity
<PAGE>
                                      -11-

securities or equity interests of the issuer of the Pledged Securities which are
required to be pledged hereunder.

          Section 9. Reasonable Care. Collateral Agent shall be deemed to have
exercised reasonable care in the custody and preservation of the Pledged
Collateral in its possession if such Pledged Collateral is accorded treatment
substantially equivalent to that which Collateral Agent, in its individual
capacity, accords its own property consisting of similar instruments or
interests, it being understood that neither Collateral Agent nor any of the
Secured Parties shall have responsibility for (i) ascertaining or taking action
with respect to calls, conversions, exchanges, maturities, tenders or other
matters relating to any Pledged Collateral, whether or not Collateral Agent or
any other Secured Party has or is deemed to have knowledge of such matters, or
(ii) taking any necessary steps to preserve rights against any Person with
respect to any Pledged Collateral.

          Section 10. Remedies Upon Default; Decisions Relat- ing to Exercise of
Remedies.

          (a) If any Event of Default shall have occurred and be continuing,
Collateral Agent shall have the right, in addition to other rights and remedies
provided for herein or otherwise available to it to be exercised from time to
time, (i) to retain and apply the Distributions to the Secured Obligations as
provided in Section 11 hereof, (ii) to exercise any remedies set forth in any
Intercompany Notes (to the extent that a default has occurred thereunder) and
(iii) to exercise all the rights and remedies of a secured party under the Code
at the time of an event of default, and Collateral Agent may also in its sole
discretion, without notice except as specified below, sell the Pledged
Collateral or any part thereof (including, without limitation, any partial
interest in the Pledged Securities) in one or more parcels at public or private
sale, at any exchange, broker's board or at any of Collateral Agent's offices or
elsewhere, for cash, on credit or for future delivery, and at such price or
prices and upon such other terms as Collateral Agent may deem commercially
reasonable, irrespective of the impact of any such sales on the market price of
the Pledged Collateral. Collateral Agent or any other Secured Party or any of
their respective Affiliates may be the purchaser of any or all of the Pledged
Collateral at any such sale and shall be entitled, for the purpose of bidding
and making settlement or payment of the purchase price for all or any portion of
the Pledged Collateral sold at such sale, to use and apply any of the Secured
Obligations owed to such Person as a credit on account of the purchase price of
any Pledged Collateral payable by such Person at such sale. Each purchaser at
<PAGE>
                                      -12-

any such sale shall acquire the property sold absolutely free from any claim or
right on the part of any Pledgor, and each Pledgor hereby waives, to the fullest
extent permitted by law, all rights of redemption, stay and/or appraisal which
it now has or may at any time in the future have under any rule of law or
statute now existing or hereafter enacted. Each Pledgor acknowledges and agrees
that, to the extent notice of sale shall be required by law, five Business Days
notice to such Pledgor of the time and place of any public sale or the time
after which any private sale or other intended disposition is to take place
shall constitute reasonable notification of such matters. No notification need
be given to a Pledgor if it has signed, after the occurrence of an Event of
Default, a statement renouncing or modifying any right to notification of sale
or other intended disposition. Collateral Agent shall not be obligated to make
any sale of Pledged Collateral regardless of notice of sale having been given.
Collateral Agent may adjourn any public or private sale from time to time by
announcement at the time and place fixed therefor, and such sale may, without
further notice, be made at the time and place to which it was so adjourned. Each
Pledgor hereby waives, to the fullest extent permitted by law, any claims
against Collateral Agent arising by reason of the fact that the price at which
any Pledged Collateral may have been sold at such a private sale was less than
the price which might have been obtained at a public sale, even if Collateral
Agent accepts the first offer received and does not offer such Pledged
Collateral to more than one offeree.

          (b) Each Pledgor recognizes that, by reason of certain prohibitions
contained in the Securities Act of 1933, as amended (the "Securities Act"), and
applicable state securities laws, Collateral Agent may be compelled, with
respect to any sale of all or any part of the Pledged Collateral, to limit
purchasers to Persons who will agree, among other things, to acquire the Pledged
Collateral for their own account, for investment and not with a view to the
distribution or resale thereof. Each Pledgor acknowledges that any such private
sales may be at prices and on terms less favorable to Collateral Agent than
those obtainable through a public sale without such restrictions (including,
without limitation, a public offering made pursuant to a registration statement
under the Securities Act), and, notwithstanding such circumstances, agrees that
any such private sale shall be deemed to have been made in a commercially
reasonable manner and that Collateral Agent shall have no obligation to engage
in public sales and no obligation to delay the sale of any Pledged Collateral
for the period of time necessary to permit the issuer thereof to register it for
a form of public sale requiring registration under the
<PAGE>
                                      -13-

Securities Act or under applicable state securities laws, even if such issuer
would agree to do so.

          (c) If Collateral Agent determines to exercise its right hereunder to
sell any or all of the Pledged Collateral, upon written request, each Pledgor
shall from time to time furnish to Collateral Agent all such information as
Collateral Agent may request in order to determine the number of securities
included in the Pledged Collateral which may be sold by Collateral Agent as
exempt transactions under the Securities Act and the rules of the Securities and
Exchange Commission thereunder, as the same are from time to time in effect.

          (d) In addition to any of the other rights and remedies hereunder,
Collateral Agent shall have the right to institute a proceeding seeking specific
performance in connection with any of the agreements or obligations hereunder.

          (e) Notwithstanding any other provision of this Agreement to the
contrary, if, after giving effect to (i) any sale, transfer or other disposition
of any or all of the Pledged Collateral pursuant hereto and after the
application of the proceeds hereunder to the Secured Obligations and (ii) the
sale, transfer or other disposition of any collateral pledged pursuant to any
other Security Document and the application of such proceeds thereunder, any
Secured Obligation remains unpaid or unsatisfied, each Pledgor shall remain
liable for the unpaid and unsatisfied amount of such Secured Obligations for
which such Pledgor is otherwise liable pursuant to the Credit Agreement or
otherwise.

          Section 11. Application of Proceeds. All Distributions held from time
to time by Collateral Agent in accordance with the terms of this Agreement and
all proceeds received by Collateral Agent in respect of any sale of, collection
from, or other realization upon all or any part of the Pledged Collateral
pursuant to the exercise by Collateral Agent of its remedies as a secured
creditor as provided in Section 10 hereof shall be applied, together with any
other sums then held by Collateral Agent pursuant to this Agreement, promptly by
Collateral Agent as follows:

          FIRST, to the payment of all costs and expenses, fees, commissions and
     taxes of such sale, collection or other realization, including, without
     limitation, compensation to Collateral Agent and its agents and the
     reasonable fees and expenses of its counsel, and all expenses, liabilities
     and advances made or incurred by Collateral Agent in connection therewith,
     together with interest on each such amount at the highest rate then in
     effect under
<PAGE>
                                      -14-

     the Credit Agreement from and after the date such amount
     is due, owing or unpaid until paid in full;

          SECOND, to the payment of all other costs and expenses of such sale,
     collection or other realization, including, without limitation,
     compensation to the Banks and their agents and the reasonable fees and
     expenses of their counsel and all costs, liabilities and indebtedness made
     or incurred by the Banks in connection therewith, together with interest on
     each such amount at the highest rate then in effect under the Credit
     Agreement from and after the date such amount is due, owing or unpaid until
     paid in full;

          THIRD, to the indefeasible payment in full in cash of interest and all
     amounts other than principal under the Credit Agreement at any time and
     from time to time owing by any Pledgor under or in connection with the
     Credit Agreement, ratably according to the unpaid amounts thereof, without
     preference or priority of any kind among amounts so due and payable,
     together with interest on each such amount at the highest rate then in
     effect under the Credit Agreement from and after the date such amount is
     due, owing or unpaid until paid in full;

          FOURTH, to the indefeasible payment in full in cash of principal at
     any time and from time to time owing by the Pledgors under or in connection
     with the Credit Agreement, ratably according to the unpaid amounts thereof,
     without preference or priority of any kind, among amounts so due and
     payable, together with interest on each such amount at the highest rate
     then in effect under the Credit Agreement from and after the date such
     amount is due, owing or unpaid until paid in full; and

          FIFTH, the balance, if any, to the Person lawfully entitled thereto
     (including Pledgor or its successors or assigns).

          Section 12. Expenses. Each Subsidiary Pledgor with respect to itself,
and the Borrowers with respect to themselves and jointly and severally with
respect to all Subsidiary Pledgors, will upon demand pay to Collateral Agent the
amount of any and all expenses of Collateral Agent in connection with this
Agreement in accordance with Section 12.01 of the Credit Agreement. All amounts
payable by any Pledgor under this Section 12 shall be due upon demand and shall
be part of the Secured Obligations. Each Pledgor's obligations under this
Section shall survive the termination of this Agreement and the discharge of
such Pledgor's other obligations hereunder.
<PAGE>
                                      -15-

          Section 13. No Waiver; Cumulative Remedies. (a) No failure on the part
of Collateral Agent to exercise, no course of dealing with respect to, and no
delay on the part of Collateral Agent in exercising, any right, power or remedy
hereunder shall operate as a waiver thereof; nor shall any single or partial
exercise of any such right, power or remedy hereunder preclude any other or
further exercise thereof or the exercise of any other right, power or remedy.
The remedies herein provided are cumulative and are not exclusive of any
remedies provided by law.

          (b) In the event Collateral Agent shall have instituted any proceeding
to enforce any right, power or remedy under this Agreement by foreclosure, sale,
entry or otherwise, and such proceeding shall have been discontinued or
abandoned for any reason or shall have been determined adversely to Collateral
Agent, then and in every such case, each Pledgor, Collateral Agent and each
holder of any of the Secured Obligations shall, subject to any determination in
such proceeding, be restored to their respective former positions and rights
hereunder with respect to the Pledged Collateral, and all rights, remedies and
powers of Collateral Agent and the Secured Parties shall continue as if no such
proceeding had been instituted.

          Section 14. Collateral Agent. Collateral Agent has been appointed as
collateral agent pursuant to the Credit Agreement. The actions of Collateral
Agent hereunder are subject to the provisions of the Credit Agreement.
Collateral Agent shall have the right hereunder to make demands, to give
notices, to exercise or refrain from exercising any rights, and to take or
refrain from taking action (including, without limitation, the release or
substitution of Pledged Collateral), in accordance with this Agreement and the
Credit Agreement. Collateral Agent may resign and a successor Collateral Agent
may be appointed in the manner provided in the Credit Agreement. Upon the
acceptance of any appointment as Collateral Agent by a successor Collateral
Agent, that successor Collateral Agent shall thereupon succeed to and become
vested with all the rights, powers, privileges and duties of the retiring
Collateral Agent under this Agreement, and the retiring Collateral Agent shall
thereupon be discharged from its duties and obligations under this Agreement.
After any retiring Collateral Agent's resignation, the provisions of this
Agreement shall inure to its benefit as to any actions taken or omitted to be
taken by it under this Agreement while it was Collateral Agent.

          Section 15. Collateral Agent May Perform; Collateral Agent Appointed
Attorney-in-Fact. If any Pledgor shall fail to do any act or thing that it has
covenanted to do hereunder or any warranty on the part of any Pledgor contained
herein shall
<PAGE>
                                      -16-

be breached, Collateral Agent or any Secured Party may (but shall not be
obligated to), upon notice to any such Pledgor, do the same or cause it to be
done or remedy any such breach, and may expend funds for such purpose. Any and
all amounts so expended by Collateral Agent or such Secured Party shall be paid
by such Pledgor promptly upon demand therefor, with interest at the highest rate
then in effect under the Credit Agreement during the period from and including
the date on which such funds were so expended to the date of repayment. Each
Pledgor's obligations under this Section 15 shall survive the termination of
this Agreement and the discharge of such Pledgor's other obligations under the
Credit Agreement and the other Credit Documents. Each Pledgor hereby appoints
Collateral Agent its attorney-in-fact, with full authority in the place and
stead of such Pledgor and in the name of such Pledgor, or otherwise, from time
to time during the continuance of an Event of Default or at any other time that
such Pledgor has failed, after notice from Collateral Agent, to take any action
required to be taken by it hereunder, in Collateral Agent's discretion to take
any action and to execute any instrument consistent with the terms of this
Agreement and the Credit Agreement which Collateral Agent may deem necessary or
advisable to accomplish the purposes of this Agreement. The foregoing grant of
authority is a power of attorney coupled with an interest and such appointment
shall be irrevocable for the term of this Agreement. Each Pledgor hereby
ratifies, to the fullest extent permitted by law, all that such attorney shall
lawfully do or cause to be done by virtue hereof.

          Section 16.  Indemnity.

          (a) Indemnity. Each of the Borrowers and the Subsidiary Pledgor with
respect to itself, and the Borrowers with respect to themselves and jointly and
severally with respect to the Subsidiary Pledgor, agrees to indemnify, pay and
hold harmless Collateral Agent and each of the Secured Parties in accordance
with the provisions of Section 12.01 of the Credit Agreement. To the extent that
the undertaking to indemnify, pay and hold harmless set forth in the preceding
sentence may be unenforceable because it is violative of any law or public
policy, each Pledgor shall contribute the maximum portion which it is permitted
to pay and satisfy under applicable law, to the payment and satisfaction of all
indemnified liabilities incurred by the indemnitees or any of them.

          (b) Survival. The obligations of each Pledgor contained in this
Section 16 shall survive the termination of this Agreement and the discharge of
such Pledgor's other obligations under this Agreement and the other Credit
Documents.
<PAGE>
                                      -17-

          (c) Reimbursement. Any amounts paid by any Indemnitee as to which such
indemnitee has the right to reimbursement shall constitute Secured Obligations
secured by the Pledged Collateral.

          Section 17. Modification in Writing. No amendment, modification,
supplement, termination or waiver of or to any provision of this Agreement, nor
consent to any departure by any Pledgor therefrom, shall be effective unless the
same shall be done in accordance with the terms of this Agreement and the Credit
Agreement. Any amendment, modification or supplement of or to any provision of
this Agreement, any waiver of any provision of this Agreement and any consent to
any departure by any Pledgor from the terms of any provision of this Agreement,
shall be effective only in the specific instance and for the specific purpose
for which made or given. Except where notice is specifically required by this
Agreement, no notice to or demand on any Pledgor in any case shall entitle such
Pledgor to any other or further notice or demand in similar or other
circumstances.

          Section 18. Termination; Release. When all the Secured Obligations
have been paid in full and the Commitments of the Banks to make any Loan or to
issue any Letter of Credit under the Credit Agreement have expired, this
Agreement shall terminate. Upon termination of this Agreement or any release of
Pledged Collateral in accordance with the provisions of the Credit Agreement,
the Collateral Agent shall, upon the request and at the sole cost and expense of
any Pledgor, forthwith assign, transfer and deliver to such Pledgor, against
receipt and without recourse to or warranty by Collateral Agent, such of the
Pledged Collateral pledged by it to be released (in the case of a release) as
may be in the possession of Collateral Agent and as shall not have been sold or
otherwise applied pursuant to the terms hereof, and, with respect to any other
Pledged Collateral, proper instruments (including, without limitation, Uniform
Commercial Code termination statements on Form UCC-3) acknowledging the
termination of this Agreement or the release of such Pledged Collateral, as the
case may be.

          Section 19. Notices. All notices or other communi- cations herein
required to be given shall be given at the address and in the manner required in
the Credit Agreement.

          Section 20. Continuing Security Interest; Assignment. This Agreement
shall create a continuing security interest in the Pledged Collateral and shall
(a) be binding upon each Pledgor, and its successors and assigns and (b) inure,
together with the rights and remedies of Collateral Agent hereunder, to the
benefit of Collateral Agent and the other Secured
<PAGE>
                                      -18-

Parties and each of their respective successors, transferees and assigns; no
other Persons (including, without limitation, any other creditor of any Pledgor)
shall have any interest herein or any right or benefit with respect hereto.

          Section 21. GOVERNING LAW; TERMS. THIS AGREEMENT SHALL BE GOVERNED BY,
AND SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF
NEW YORK, WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAWS, EXCEPT TO THE
EXTENT THAT THE VALIDITY OR PERFECTION OF THE SECURITY INTEREST HEREUNDER, OR
REMEDIES HEREUNDER, IN RESPECT OF ANY PARTICULAR PROPERTY ARE GOVERNED BY THE
LAWS OF A JURISDICTION OTHER THAN THE STATE OF NEW YORK.

          Section 22. CONSENT TO JURISDICTION AND SERVICE OF PROCESS. ALL
JUDICIAL PROCEEDINGS BROUGHT AGAINST ANY PLEDGOR WITH RESPECT TO THIS AGREEMENT
MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT JURISDICTION IN THE
STATE OF NEW YORK AND BY EXECUTION AND DELIVERY OF THIS AGREEMENT EACH PLEDGOR
ACCEPTS FOR ITSELF AND IN CONNECTION WITH ITS PROPERTIES, GENERALLY AND
UNCONDITIONALLY, THE NONEXCLUSIVE JURISDICTION OF THE AFORESAID COURTS, AND
IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED THEREBY IN CONNECTION
WITH THIS AGREEMENT. EACH PARTY HERETO HEREBY IRREVOCABLY WAIVES TRIAL BY JURY,
AND EACH PARTY HERETO HEREBY IRREVOCABLY WAIVES ANY OBJECTION, INCLUDING,
WITHOUT LIMITATION, ANY OBJECTION TO THE LAYING OF VENUE OR BASED ON THE GROUNDS
OF FORUM NON CONVENIENS, WHICH IT MAY NOW OR HEREAFTER HAVE TO THE BRINGING OF
ANY SUCH ACTION OR PROCEEDING IN SUCH RESPECTIVE JURISDICTIONS.

          Section 23. Severability of Provisions. Any provision of this
Agreement which is prohibited or unenforceable in any jurisdiction shall, as to
such jurisdiction, be ineffective to the extent of such prohibition or
unenforceability without invalidating the remaining provisions hereof or
affecting the validity or enforceability of such provision in any other
jurisdiction.

          Section 24. Execution in Counterparts. This Agreement and any
amendments, waivers, consents or supplements hereto may be executed in any
number of counterparts and by different parties hereto in separate counterparts,
each of which when so executed and delivered shall be deemed to be an original,
but all such counterparts together shall constitute one and the same agreement.

          Section 25. Headings. The Section headings used in this Agreement are
for convenience of reference only and shall not affect the construction of this
Agreement.
<PAGE>
                                      -19-

          Section 26. Obligations Absolute. All obligations of each Pledgor
hereunder shall be absolute and unconditional irrespective of:

          (i) any bankruptcy, insolvency, reorganization, arrangement,
     readjustment, composition, liquidation or the like of any other Pledgor;

         (ii) any lack of validity or enforceability of the Credit Agreement,
     any other Credit Document, or any other agreement or instrument relating
     thereto;

        (iii) any change in the time, manner or place of payment of, or in any
     other term of, all or any of the Secured Obligations, or any other
     amendment or waiver of or any consent to any departure from the Credit
     Agreement, any other Credit Document, or any other agreement or instrument
     relating thereto;

         (iv) any exchange, release or non-perfection of any other collateral or
     the pledge of any additional collateral or the failure to recover in
     respect thereof pursuant to any remedy or right of the Collateral Agent or
     any Bank contained in this Agreement, the Credit Agreement, or any release
     or amendment or waiver of or consent to any departure from any guarantee,
     for all or any of the Secured Obligations;

          (v) any exercise or non-exercise, or any waiver of any right, remedy,
     power or privilege under or in respect of this Agreement or any Credit
     Document except as specifically set forth in a waiver granted pursuant to
     the provisions of Section 17 hereof; or

         (vi) any other circumstances which might otherwise constitute a defense
     available to, or a discharge of, any Pledgor.

          Section 27. Collateral Agent's Right to Sever Indebtedness. (a) Each
Pledgor acknowledges that (i) the Pledged Collateral does not constitute the
sole source of security for the payment and performance of the Secured
Obligations and that the Secured Obligations are also secured by other types of
property of such Pledgor and its Affiliates in other jurisdictions (all such
property, collectively, the "Collateral"), (ii) the number of such jurisdictions
and the nature of the transaction of which this instrument is a part are such
that it would have been impracticable for the parties to allocate to each item
of Collateral a specific loan amount and to execute in respect of such item a
separate credit agreement and
<PAGE>
                                      -20-

security agreement, and (iii) each Pledgor intends that Collateral Agent have
the same rights with respect to the Pledged Collateral, in any judicial
proceeding relating to the exercise of any right or remedy hereunder or
otherwise, that Collateral Agent would have had if each item of Collateral had
been pledged or encumbered pursuant to a separate credit agreement and security
agreement. In furtherance of such intent, each Pledgor agrees to the greatest
extent permitted by law that, from and after the occurrence of an Event of
Default, Collateral Agent may at any time by notice (an "Allocation Notice") to
such Pledgor allocate a portion of the Secured Obligations (the "Allocated
Indebtedness") to the Pledged Collateral pledged by it and sever from the
remaining Secured Obligations the Allocated Indebtedness. From and after the
giving of an Allocation Notice with respect to the Pledged Collateral, the
Secured Obligations hereunder shall be limited to the extent set forth in the
Allocation Notice and (as so limited) shall, for all purposes, be construed as a
separate credit obligation of such Pledgor unrelated to the other transactions
contemplated by the Credit Agreement. To the extent that the proceeds of any
judicial proceeding relating to the exercise of any right or remedy hereunder of
the Pledged Collateral shall exceed the Allocated Indebtedness, such proceeds
shall belong to such Pledgor and shall not be available hereunder to satisfy any
Secured Obligations of such Pledgor other than the Allocated Indebtedness. In
any action or proceeding to exercise any right or remedy under this Agreement
which is commenced after the giving by Collateral Agent of an Allocation Notice,
the Allocation Notice shall be conclusive proof of the limits of the Secured
Obligations hereby secured, and such Pledgor may introduce, by way of defense or
counterclaim, evidence thereof in any such action or proceeding. Notwithstanding
any provision of this Section 27, the proceeds received by the Collateral Agent
pursuant to this Agreement shall be applied by the Collateral Agent in
accordance with the provisions of Section 11 hereof.

          (b) Each Pledgor hereby waives to the fullest extent permitted by law
the right to a discharge of any of the Secured Obligations under any statute or
rule of law now or hereafter in effect which provides that the exercise of any
particular right or remedy as provided for herein (by judicial proceedings or
otherwise) constitutes the exclusive means for satisfaction of the Secured
Obligations or which makes unavailable any further judgment or any other right
or remedy provided for herein because the Collateral Agent elected to proceed
with the exercise of such initial right or remedy or because of any failure by
Collateral Agent to comply with laws that prescribe conditions to the
entitlement to such subsequent judgment or the availability of such subsequent
right or remedy. In the event
<PAGE>
                                      -21-

that, notwithstanding the foregoing waiver, any court shall for any reason hold
that such subsequent judgment or action is not available to Collateral Agent, no
Pledgor shall (i) to the extent permitted by applicable law, introduce in any
other jurisdiction any judgment so holding as a defense to enforcement against
such Pledgor of any remedy in the Credit Agreement or any other Credit Document
or (ii) seek to have such judgment recognized or entered in any other
jurisdiction, and any such judgment shall in all events be limited in
application only to the state or jurisdiction where rendered and only with
respect to the Collateral referred to in such judgment.

          (c) In the event any instrument in addition to the Allocation Notice
is necessary to effectuate the provisions of this Section 27, including, without
limitation, any amendment to this Agreement, any substitute promissory note or
affidavit or certificate of any kind, each Pledgor agrees that it shall execute
and deliver any such instrument reasonably requested by the Collateral Agent so
long as such instrument is consistent with the terms of the Credit Documents.

          Section 28. Future Advances. Without releasing or in any way impairing
any of the Secured Obligations existing as of the date hereof, this Agreement
shall secure the obligations of the Borrowers and the Subsidiary Pledgor in
respect of any Loans made and any Letters of Credit issued on or after the date
hereof pursuant to the terms of the Credit Agreement.
<PAGE>
          IN WITNESS WHEREOF, each Pledgor and the Collateral Agent have caused
this Agreement to be duly executed and delivered by their duly authorized
officers as of the date first above written.

                               DI INDUSTRIES, INC.

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

                         DRILLERS, INC.

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

                            BANKERS TRUST COMPANY, as
                                Collateral Agent

                         By:
                             --------------------------------
                             Name:
                             Title:
<PAGE>
                                   SCHEDULE A

                                  Pledged Stock

                                                                   PERCENTAGE OF
                                                                      CAPITAL OR
                                                                    OTHER EQUITY
                CLASS     PAR    CERTIFICATE  NUMBER     INTERESTS OF
ISSUER          OF STOCK  VALUE     NO(S).    OF SHARES  ISSUER PLEDGED
- -----           -------   -----  -----------  ---------  --------------

Drillers, Inc.                                              100%

DI International, Inc.                                      100%
<PAGE>

                                   SCHEDULE B

                               Intercompany Notes
<PAGE>
                                   SCHEDULE C

                  Chief Executive Offices of Pledgors

Pledgor                                  Office
- -------                                  ------

DI Industries, Inc.

Drillers Inc.

DI International, Inc.
<PAGE>
                                    EXHIBIT 1

                                PLEDGE AMENDMENT

          This Pledge Amendment, dated ______________, is delivered pursuant to
Section 5 of the Agreement referred to below. The undersigned hereby agrees that
this Pledge Amendment may be attached to the Pledge Agreement, dated as of
December __, 1996, between the undersigned, certain other parties identified
therein and BANKERS TRUST COMPANY, as Collateral Agent (the "Agreement";
capitalized terms used herein and not defined have the meanings ascribed to them
in the Agreement) and that the Pledged Securities and/or Intercompany Notes
listed on this Pledge Amendment shall be deemed to be and shall become part of
the Pledged Collateral and shall secure all Secured Obligations.

                              -------------------------------,
                                     Pledgor

                              By:  ____________________________
                                      Name:
                                     Title:
<PAGE>
                               Pledged Securities

                                                         PERCENTAGE OF
                                                        ALL CAPITAL OR
                                                         OTHER EQUITY
         CLASS OF    PAR       CERTIFICATE   NUMBER      INTERESTS OF
ISSUER   STOCK       VALUE        NO(S).     OF SHARES      ISSUER
- ------   -------     ----      -----------   ---------   --------------
<PAGE>
                               Intercompany Notes

              PRINCIPAL      DATE OF          INTEREST     MATURITY
ISSUER        AMOUNT         ISSUANCE         RATE         DATE
- ------        --------       --------         --------     --------
<PAGE>
                                                                    Exhibit G to
                                                                Credit Agreement

                      SECURITY AGREEMENT

          SECURITY AGREEMENT, dated as of December 31, 1996, made by DI
INDUSTRIES, INC. and DRILLERS, INC. (collectively the "Borrowers"), each Texas
corporations having an office at 450 Gears Road, Suite 625, Houston, Texas 77067
and EACH OF THE SUBSIDIARIES LISTED ON THE SIGNATURE PAGES HERETO (collectively,
the "Subsidiary Pledgors"; together with the Borrowers, "the Pledgors"), in
favor of BANKERS TRUST COMPANY, a New York banking corporation having an office
at 130 Liberty Street, New York, New York 10006, as collateral agent, as
pledgee, assignee and secured party (in such capacity and together with any
successors in such capacity, the "Collateral Agent") for the Banks (as
hereinafter defined).

                       R E C I T A L S :

          A. Borrowers own, directly or through its Subsidiaries (as defined in
the Credit Agreement referred to below), all of the issued and outstanding stock
of each of the Subsidiary Pledgors.

          B. Each Pledgor is the owner of the Pledged Collat- eral (as
hereinafter defined) pledged by it pursuant to this Agreement.

          C. Borrowers, the Subsidiary Pledgors, certain financial institutions
(collectively, the "Banks"), Bankers Trust Company, as Agent and Administrative
Agent, and ING (US) Capital Corporation, as Co-Agent, are entering into a
certain senior secured reducing revolving credit agreement (the "Credit
Agreement"; capitalized terms used herein and not defined shall have the meaning
assigned to such terms in the Credit Agreement), dated as of the date hereof,
pursuant to which the Banks agreed to (i) extend to or for the account of the
Borrowers certain Revolving Loans in an aggregate principal amount not to exceed
$35,000,000.00 and (ii) issue to or for the account of the Borrowers Letters of
Credit.

          D. Each Subsidiary Pledgor is, as of the date hereof, executing the
Credit Agreement pursuant to which it will guarantee the obligations of the
Borrowers under the Credit Agreement and the other Credit Documents.
<PAGE>
                                       -2-

          E. Each Subsidiary Pledgor expects to receive substantial benefit from
the execution, delivery and performance of the Credit Agreement and has agreed
to grant to the Collateral Agent, liens and security interests in the Pledged
Collateral owned by it to secure the Secured Obligations (as hereinafter
defined).

          F. It is a condition to the obligations of the Banks to make the Loans
under the Credit Agreement and to issue Letters of Credit that Borrowers and
each Subsidiary Pledgor execute and deliver the applicable Credit Documents,
including this Agreement.

                      A G R E E M E N T :

          NOW, THEREFORE, in consideration of the foregoing premises and other
good and valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, each Pledgor and the Collateral Agent hereby agree as follows:

          Section 1. Pledge. As collateral security for the payment and
performance when due of all the Secured Obligations, each Pledgor hereby
pledges, hypothecates, assigns, transfers and grants to the Collateral Agent,
for its benefit and the benefit of the Secured Parties (as hereinafter defined),
continuing security interests, in and to all of the right, title and interest of
such Pledgor in, to and under the following property whether now existing or
hereafter arising or acquired from time to time (collectively, the "Pledged
Collateral"):

          (i)  all Equipment (as hereinafter defined);

         (ii)  all Inventory (as hereinafter defined);

        (iii)  all Contract Rights (as hereinafter defined);

         (iv)  all Instruments (as hereinafter defined);

          (v)  all General Intangibles (as hereinafter
               defined);

         (vi)  all Receivables (as hereinafter defined);

        (vii)  all books, records, ledgers, printouts, file
               materials and other papers containing
<PAGE>
                                       -3-

               information relating to Receivables and any
               account debtors in respect thereof;

       (viii)  all Permits (as hereinafter defined);

         (ix)  all Pension Plan Reversions (as hereinafter
               defined);

          (x)  all Patents;

         (xi)  all Trademarks (as hereinafter defined);

        (xii)  all Copyrights (as hereinafter defined);

       (xiii)  all Licenses (as hereinafter defined);

        (xiv)  all goodwill connected with the use of, and sym-
               bolized by any of, the Patents, Trademarks,
               Copyrights and Licenses;

         (xv)  all Documents (as hereinafter defined) relating
               to any of the foregoing; and

        (xvi)  all Proceeds (as hereinafter defined) of any of
               the foregoing.

          Section 2. Secured Obligations. This Agreement is entered into by each
Pledgor in favor of the Collateral Agent for its benefit and the benefit of the
Banks, the Agent and the Co-Agent (collectively, the "Secured Parties") to
secure the payment and performance in full when due, whether at stated maturity,
by acceleration or otherwise (including, without limitation, the payment of
interest and other amounts which would accrue and become due but for the filing
of a petition in bankruptcy or the operation of the automatic stay under Section
362(a) of the Bankruptcy Code) of (i) all Obligations of the Pledgors now or
hereafter existing under or in respect of the Credit Agreement; (ii) all
obligations of each Pledgor now or hereafter existing under or in respect of
this Agreement or any other Security Documents; and (iii) all interest, charges,
fees, costs, expenses, reimbursements, premiums, indemnities or other payments
of any kind or nature in respect of amounts or instruments referred to in any of
clauses (i) and (ii) (the obligations described in clauses (i) through (iii),
collectively, the "Secured Obligations").
<PAGE>
                                       -4-

          Section 3. No Release. Nothing set forth in this Agreement shall
relieve any Pledgor from the performance of any term, covenant, condition or
agreement on such Pledgor's part to be performed or observed under or in respect
of any of the Pledged Collateral pledged by it or from any liability to any
Person under or in respect of any of the Pledged Collateral pledged by it or
shall impose any obligation on the Collateral Agent or any Secured Party to
perform or observe any such term, covenant, condition or agreement on any
Pledgor's part to be so performed or observed or shall impose any liability on
the Collateral Agent or any Secured Party for any act or omission on the part of
any Pledgor relating thereto or for any breach of any representation or warranty
on the part of any Pledgor contained in this Agreement or any other Credit
Document, or under or in respect of the Pledged Collateral or made in connection
herewith or therewith.

          Section 4. Supplements; Further Assurances. Each Pledgor agrees that,
at any time and from time to time, it will execute and file and refile such
financing statements, continuation statements, amendments thereto and other
documents (including, without limitation, this Agreement) in such offices
(including, without limitation, the United States Patent and Trademark Office
and the United States Copyright Office), as the Collateral Agent may reasonably
deem necessary or appropriate, wherever required or permitted by law in order to
perfect, protect and preserve the rights and interests granted to the Collateral
Agent hereunder. Each Pledgor agrees to do such further acts and things, and to
execute and deliver to the Collateral Agent such additional assignments,
agreements, powers and instruments, as the Collateral Agent may reasonably deem
necessary or appropriate, wherever required or permitted by law in order to
perfect and preserve the rights and interests granted to the Collateral Agent
hereunder or to carry into effect the purposes of this Agreement or better to
assure and confirm unto the Collateral Agent its respective rights, powers and
remedies hereunder. All of the foregoing shall be at the sole cost and expense
of the Pledgors.

          Section 5. Representations, Warranties and Covenants. Each Pledgor
represents, warrants or covenants (as applicable), after giving effect to the
Transaction and the repayment of the Indebtedness incurred under the Existing
Credit Agreement, as follows (as to itself only, except that Borrower represents
and warrants as to itself and each of the Subsidiary Pledgors):
<PAGE>
                                       -5-

          (a) Necessary Filings. Financing statements on form UCC-1 have been
     prepared and delivered to the Collateral Agent herewith. When this
     Agreement is duly executed and delivered and (i) such financing statements
     have been filed in the jurisdictions indicated thereon, and (ii) this
     Agreement is filed and accepted in the United States Patent and Trademark
     Office and the United States Copyright Office (such filings, the "Federal
     Filings"), then all filings shall have been made to create, preserve,
     protect and perfect the security interest granted by such Pledgor to the
     Collateral Agent hereby in respect of such of the Pledged Collateral in
     which a security interest can be perfected by the filing of a financing
     statement or the filing of a security agreement with the United States
     Patent and Trademark Office or the United States Copyright Office. When
     such filings are duly made the security interests granted to the Collateral
     Agent pursuant to this Agreement in and to such Pledged Collateral
     constitutes and hereafter will constitute perfected Liens and security
     interests therein in favor of the Collateral Agent subject in priority to
     no Liens other than the Liens identified on Schedule A hereto relating to
     the items of the Pledged Collateral identified on such schedule
     (collectively, "Prior Liens").

          (b) Ownership. Each Pledgor is, as of the date hereof, and, as to
     Pledged Collateral acquired by it from time to time after the date hereof,
     such Pledgor will be, the legal record and beneficial owner of all of its
     respective Pledged Collateral free from any Lien or other right, title or
     interest of any Person other than (i) Prior Liens, (ii) Permitted
     Encumbrances (as hereinafter defined) and (iii) Liens and security
     interests granted by such Pledgor to the Collateral Agent pursuant to this
     Agreement. Each Pledgor shall defend its respective ownership of its
     Pledged Collateral against all claims and demands of all other Persons at
     any time claiming any interest (other than a Prior Lien or Permitted
     Encumbrance) in the Pledged Collateral adverse to the Collateral Agent.

          (c) Other Financing Statements. Except as set forth on Schedule A
     hereto, there is no financing statement (or similar statement or instrument
     of registration under the law of any jurisdiction) executed or authorized
     by any Pledgor covering or purporting to cover any interest of any kind in
     the Pledged Collateral and, so long as this
<PAGE>
                                       -6-

     Agreement remains in effect, no Pledgor shall execute or authorize to be
     filed in any public office any financing statement (or similar statement or
     instrument of registration under the law of any jurisdiction) or statements
     or otherwise make any Federal Filing relating to the Pledged Collateral,
     except (i) financing statements and the Federal Filings filed or to be
     filed in respect of and covering the security interests granted by any
     Pledgor to the Collateral Agent pursuant to this Agreement, (ii) financing
     statements filed in respect of Permitted Encumbrances, (iii) continuation
     statements filed in respect of Prior Liens and (iv) financing statements
     filed in respect of Pledged Collateral acquired as part of a Permitted
     Acquisition.

          (d) Chief Executive Office; Corporate Name; Records. The chief
     executive office and principal place of business and the corporate name of
     each Pledgor is as set forth on Schedule B hereto. No Pledgor shall change
     its name or move its chief executive office, except in accordance with the
     last sentence of this Section 5(d). All tangible record evidence of all
     Pledged Collateral and the only original books of account and records of
     each Pledgor relating thereto are, and will continue to be, kept at such
     respective chief executive office or principal place of business, or at
     such new location for such chief executive office as such Pledgor may
     establish in accordance with the last sentence of this Section 5(d). No
     Pledgor shall establish a new location for its chief executive office nor
     shall it change its name until (i) it shall have given the Collateral Agent
     not less than 30 days' prior written notice of its intention to do so,
     identifying such new location or name and providing such other information
     in connection therewith as the Collateral Agent or any Secured Party
     reasonably may request and (ii) with respect to such change in chief
     executive office or corporate name, the applicable Pledgor shall have taken
     all action reasonably satisfactory to the Collateral Agent and the Secured
     Parties to maintain the perfection and priority of the security interest in
     the Pledged Collateral intended to be granted hereby.

          (e) Location of Equipment and Inventory. All Equipment and Inventory
     now held or subsequently acquired by each Pledgor shall be kept at any one
     of the locations shown on Schedule C hereto other than Inventory sold on
     consignment by any of the Pledgors in the ordinary course
<PAGE>
                                       -7-

     of business, or such new location not shown on Schedule C hereto as such
     Pledgor may establish if (i) it shall have given to the Collateral Agent at
     least 30 days' prior written notice of its intention to do so (or such
     lesser period (which shall in no event be less than 15 days) as is
     practicable in the case of any Equipment or Inventory acquired in
     connection with a Permitted Acquisition), identifying such new location and
     providing such other information in connection therewith as the Collateral
     Agent may reasonably request, and (ii) with respect to such new location,
     each Pledgor shall have taken all action reasonably satisfactory to the
     Collateral Agent and the Secured Parties to maintain the perfection and
     priority of the security interest in the Pledged Collateral intended to be
     granted hereby. In the event that the aggregate value of inventory sold on
     consignment by the Pledgors exceeds $500,000, each Pledgor shall take all
     actions necessary to cause the Collateral Agent to have a perfected Lien on
     and security interest in any such inventory which exceeds in value $500,000
     in the aggregate. Each Pledgor agrees that it shall provide written notice
     to the Collateral Agent as to the amount and location of inventory held on
     consignment which exceeds in value $500,000.

          (f) Trade Names. No Pledgor conducts business under any name or trade
     name other than as set forth on Schedule D hereto.

          (g) Patents, Trademarks, Copyrights, Licenses, etc. Schedules E, F, G
     and H, respectively, attached hereto, are lists which are accurate and
     complete in all respects as of the date hereof of all registered and
     applied for Patents, Trademarks, Copyrights and Licenses (collectively, the
     "Intellectual Property") owned or licensed by each Pledgor. All information
     set forth relating to the Intellectual Property is accurate and complete in
     all respects. To each Pledgor's knowledge, such Pledgor has the right to
     use all Intellectual Property and all computer programs and other similar
     rights material to such Pledgor's business as such business is presently
     conducted and as contemplated to be conducted pursuant to the Credit
     Documents. There is not pending, or to the knowledge of the Pledgors,
     threatened any claim or litigation against or affecting any Pledgor
     contesting the validity of any of the Intellectual Property or any such
     computer programs or other rights material to such Pledgor's business.
<PAGE>
                                       -8-

          (h) No Consents, etc. No consent of any party (including, without
     limitation, stockholders or creditors of such Pledgor) and no consent,
     authorization, approval, or other action by, and, no notice to or filing
     with, any Governmental Authority or regulatory body or other Person (other
     than the filings contemplated in Section 5(a) hereof and those consents or
     approvals which have been obtained as of the date hereof) is required
     either (x) for the pledge by any Pledgor of the Pledged Collateral pledged
     by it pursuant to this Agreement, or (y) for the exercise by the Collateral
     Agent of the rights provided for in this Agreement (other than any such
     consent, approval or other action required to be taken by the Collateral
     Agent), or (z) for the exercise by the Collateral Agent of the remedies in
     respect of the Pledged Collateral pursuant to this Agreement (other than
     any such consent, approval or other action required to be taken by the
     Collateral Agent).

          (i) Benefit to Subsidiary Pledgors. Each Subsidiary Pledgor will
     receive substantial benefit as a result of the execution, delivery and
     performance of the Credit Agreement.

          Section 6.  Special Provisions Regarding Receivables.

          (a) Special Representations and Warranties. As of the time when each
of its Receivables arises, each Pledgor shall be deemed to have represented and
warranted that such Receivables and all records, papers and documents relating
thereto (i) represent, to the knowledge of Pledgor, bona fide transactions with
the account debtor evidencing indebtedness unpaid and owed by such account
debtor arising out of the performance of labor or services or the sale or lease
and delivery of the merchandise listed therein, or both, (ii) constitute and
evidence, to the knowledge of Pledgor, obligations of such account debtor,
enforceable in accordance with their respective terms (except with respect to
refunds, returns and allowances and other claims arising in the ordinary course
of business), or stamp or other taxes, and (iii) are in material compliance and
conform in all material respects with all applicable federal, state and local
laws and applicable laws of any relevant foreign jurisdiction, except where the
failure to so comply would not have a material adverse effect on the validity of
such Receivable.
<PAGE>
                                       -9-

          (b) Maintenance of Records. Each Pledgor shall keep and maintain at
its own cost and expense satisfactory and complete records of each Receivable,
including, without limitation, records of all payments received, all credits
granted thereon, all merchandise returned and all other documentation relating
thereto, and each Pledgor shall make the same available to the Collateral Agent
for inspection, at each such Pledgor's sole cost and expense, during such
Pledgor's normal business hours and upon reasonable prior notice. After the
occurrence of an Event of Default, each Pledgor shall, at each such Pledgor's
sole cost and expense, deliver all tangible evidence of Receivables, including,
without limitation, all documents evidencing Receivables and any books and
records relating thereto to the Collateral Agent or to its representatives
(copies of which evidence and books and records may be retained by each Pledgor)
at any time upon the Collateral Agent's demand. Upon the occurrence of an Event
of Default, the Collateral Agent may transfer a full and complete copy of each
Pledgor's books, records, credit information, reports, memoranda and all other
writings relating to the Receivables to and for the use by any Person that has
acquired or is contemplating acquisition of an interest in the Receivables or
the Collateral Agent's security interest therein without the consent of any
Pledgor; provided that Collateral Agent shall use reasonable efforts to cause
such Person to agree to keep all such information confidential, subject to
customary exceptions.

          (c) Modification of Terms, etc. Except in the ordinary course of
business consistent with reasonable business practice and except as may
otherwise be permitted pursuant to the Credit Agreement, no Pledgor shall
rescind or cancel any indebtedness evidenced by any Receivable or modify any
term thereof or make any adjustment with respect thereto, or extend or renew any
such indebtedness, or compromise or settle any dispute, claim, suit or legal
proceeding relating thereto, or sell any Receivable or interest therein, without
the prior written consent of the Collateral Agent. Each Pledgor shall timely
fulfill all obligations on its part to be fulfilled under or in connection with
the Receivables consistent with reasonable business practice and except as may
otherwise be permitted pursuant to the Credit Agreement.

          (d) Collection. Subject to the provisions of Section 6(c) hereof, each
Pledgor shall cause to be collected from the account debtor of each of the
Receivables, as and when due, any and all amounts owing under or on account of
any such Receivable, and apply forthwith upon receipt thereof all such
<PAGE>
                                      -10-

amounts as are so collected to the outstanding balance of such Receivable, and
each Pledgor may, with respect to a Receivable, allow in the ordinary course of
business (i) a refund or credit due and (ii) such extensions of time to pay
amounts due in respect of Receivables and such other modifications of payment
terms or settlements in respect of Receivables as shall be commercially
reasonable in the circumstances, all in accordance with each such Pledgor's
ordinary course of business consistent with its collection practices as in
effect from time to time. The reasonable costs and expenses (including, without
limitation, reasonable attorneys' fees) of collection, in any case, whether
incurred by any Pledgor, the Collateral Agent or any Bank, shall be paid by such
Pledgor.

          (e) Legend. Each Pledgor shall legend, at the request of Collateral
Agent made at any time after the occurrence of an Event of Default and in form
and manner reasonably satisfactory to Collateral Agent, its Receivables and
other books, documents and records of such Pledgor evidencing or pertaining to
its Receivables with an appropriate reference to the fact that such Receivables
have been assigned to Collateral Agent for the benefit of the Secured Parties
and that Collateral Agent has a security interest therein.

          (f) Instruments. Each Pledgor shall notify the Collateral Agent,
within five Business Days after receipt thereof by such Pledgor and, at
Collateral Agent's request, deliver to Collateral Agent any Instrument (other
than checks received from customers in the ordinary course of business)
evidencing Receivables which is in the principal amount of $250,000 or more. Any
Instrument delivered to Collateral Agent pursuant to this Section 6(f) shall be
appropriately endorsed (if applicable) to the order of Collateral Agent, as
agent for the Secured Parties, and shall be held by Collateral Agent as further
security hereunder.

          (g) Cash Collateral. Upon the occurrence of an Event of Default, if
Collateral Agent so directs, each Pledgor shall cause all payments on account of
its Receivables to be delivered to Collateral Agent to be held by Collateral
Agent as cash collateral, upon acceleration or otherwise, and without notice to
or assent by such Pledgor, Collateral Agent may apply any or all amounts then or
thereafter held as cash collateral in the manner provided in Section 12. The
costs and expenses (including, without limitation, reasonable attorneys' fees)
of collection incurred by Collateral Agent shall be paid by such
<PAGE>
                                      -11-

Pledgor in a manner consistent with the rights of the parties hereunder and
under the Credit Agreement.

          Section 7. Additional Provisions Regarding All Pledged Collateral.

          (a) After-Acquired Property. If any Pledgor shall (i) obtain any
rights to any additional Pledged Collateral or (ii) become entitled to the
benefit of any additional Pledged Collateral or any renewal or extension
thereof, including any reissue, division, continuation, or continuation-in-part
of any Patent, or any improvement on any Patent, the provisions of this
Agreement shall automatically apply thereto and any such item enumerated in
clause (i) or (ii) with respect to such Pledgor shall automatically constitute
Pledged Collateral if such would have constituted Pledged Collateral at the time
of execution of this Agreement, and be subject to the Liens and security
interests created by this Agreement without further action by any party other
than actions required to perfect such security interests. Notwithstanding
anything in this Agreement to the contrary, the provisions of this Section 7(a)
shall not apply in respect of any property acquired in connection with a
Permitted Acquisition if such property is subject to a pre-existing agreement or
arrangement which would be contravened by this Section 7(a).

          (b) Protection of Security. Except as permitted under the Credit
Agreement, no Pledgor shall take any action that impairs the rights of the
Collateral Agent or any Bank in the Pledged Collateral. Without limiting the
foregoing, each Pledgor (i) will not enter into any agreement that would impair
or conflict with such Pledgor's obligations hereunder; (ii) will, promptly
following its becoming aware thereof, notify the Collateral Agent of (a) any
adverse determination or development in any proceeding with respect to any
Pledged Collateral pledged by it, or (b) the institution of any proceeding or
any adverse determination or development in any federal, state or, local court
or administrative bodies regarding such Pledgor's claim of ownership in or right
to use any of the Pledged Collateral pledged by it which is material to such
Pledgor's business, or, with respect to Intellectual Property, its right to
register, as applicable, the Intellectual Property, or its right to keep and
maintain such registration in full force and effect; (iii) will properly
maintain (ordinary wear and tear excepted) and protect the Pledged Collateral
necessary or appropriate for the operation of such Pledgor's business unless
such Pledgor, in its reasonable business judgment,
<PAGE>
                                      -12-

has determined that such maintenance or protection would outweigh the continuing
value or utility of such Pledged Collateral to such Pledgor; (iv) will not
permit to lapse or become abandoned any Pledged Collateral unless such Pledgor
has determined that such Pledged Collateral does not contain or represent any
value or utility (other than of an immaterial nature) in its reasonable business
judgment; (v) will not settle or compromise any pending or future litigation or
administrative proceeding with respect to any Pledged Collateral which is
material to such Pledgor's business without the consent of the Collateral Agent;
(vi) will furnish to the Collateral Agent from time to time statements and
amended schedules further identifying and describing the Pledged Collateral and
such other materials evidencing or reports pertaining to the Pledged Collateral
as the Collateral Agent may from time to time reasonably request, all in
reasonable detail; and (vii) will comply with all laws, rules and regulations
applicable to the Pledged Collateral the failure to comply with which would have
a material adverse effect on the value or utility of the Pledged Collateral or
an adverse effect on the Lien on the Pledged Collateral granted to the
Collateral Agent hereunder.

          (c)  Insurance.

          (i) Each Pledgor shall at all times keep the Pledged Collateral
pledged by it insured at such Pledgor's own expense in accordance with the
provisions of Section 7.03 of the Credit Agreement.

         (ii) Upon the occurrence of an Event of Default or at any time that a
Material Adverse Effect has occurred, Collateral Agent shall have the option to
apply any proceeds of insurance received by it pursuant to this Agreement toward
the payment of the Secured Obligations in accordance with Section 11 hereof or
to continue to hold such proceeds as additional collateral to secure the
performance by the Pledgors of the Secured Obligations. So long as no Event of
Default shall have occurred and be continuing and no such Material Adverse
Effect shall have occurred, each Pledgor shall comply with Section 4.02(e) of
the Credit Agreement with respect to any proceeds of insurance received by it.

          (d) Payment of Taxes; Claims. Each Pledgor shall comply with the
provisions of Section 7.04 of the Credit Agree- ment with respect to the payment
of taxes.
<PAGE>
                                      -13-

          (e) Financing Statements. Each Pledgor shall sign and deliver to the
Collateral Agent such financing and continuation statements, in form reasonably
acceptable to the Collateral Agent, as may from time to time be required to
continue and maintain valid, enforceable security interests in its respective
Pledged Collateral having the priority provided herein and the other rights, as
against third parties, provided hereby, all in accordance with the Code. Each
Pledgor shall pay any applicable filing fees and other expenses related to the
filing of such financing and continuation statements. Each Pledgor authorizes
the Collateral Agent to file any such financing or continuation statements
without the signature of such Pledgor where permitted by law.

          (f) Warehouse Receipts Non-Negotiable. If any warehouse receipt or
receipt in the nature of a warehouse receipt is issued with respect to any of
the Inventory, no Pledgor shall permit such warehouse receipt or receipt in the
nature thereof to be "negotiable" (as such term is used in Section 7-104 of the
Code or under other relevant law).

          (g) Maintenance of Equipment. Each Pledgor shall comply with the
provisions of Section 7.09 of the Credit Agreement with respect to its
Equipment.

          Section 8. Special Provisions Regarding Intellectual Property.

          (a) Modifications. Each Pledgor authorizes the Collateral Agent to
modify this Agreement by amending Schedules E, F, G and/or H annexed hereto to
include any future Intellectual Property of any Pledgor and the Collateral Agent
shall give prompt written notice of any such amendment to the Pledgors. No such
amendment shall include Intellectual Property acquired by a Pledgor in
connection with a Permitted Acquisition which by its terms cannot be assigned to
the Collateral Agent as part of the Pledged Collateral.

          (b) Applications. Each Pledgor shall file and prosecute diligently all
applications for the Patents, the Trademarks or the Copyrights now or hereafter
pending that would be necessary to the business of such Pledgor to which any
such applications pertain, and, subject to the last sentence of this Section
8(b), shall do all acts necessary to preserve and maintain all rights in the
Pledged Collateral necessary for the operation of Pledgor's business. Any and
all costs and expenses incurred in connection with any such actions shall be
<PAGE>
                                      -14-

borne by Pledgor. No Pledgor shall abandon any right to file a Patent or
Trademark or Copyright application, or any pending Patent, Trademark or
Copyright application or any Patent, Trademark or Copyright necessary for the
operation of such Pledgor's business without the consent of Collateral Agent
unless Pledgor has determined that such filing does not contain or represent any
value or utility (other than of an immaterial nature) consistent with prudent
business practice.

          (c) Restriction on Licensing Intellectual Property. No Pledgor shall
license any Intellectual Property or any portion thereof, or amend or permit the
amendment of any of the Licenses in either case in a manner that adversely
affects the right to receive any amount of payments thereunder, or is in any
manner adverse to the interests of the Collateral Agent in the Intellectual
Property without the consent of the Collateral Agent; provided, however, that
the foregoing shall not prohibit any Pledgor from entering into any such
licensing arrangement or License to which such Pledgor becomes a party at the
time of, or in connection with, any Permitted Acquisition.

          Section 9. Transfers and Other Liens. No Pledgor shall (i) except as
permitted by the Credit Agreement, sell, convey, assign or otherwise dispose of,
or grant any option with respect to, any of its respective Pledged Collateral or
(ii) create or permit to exist any Lien upon or with respect to any of its
respective Pledged Collateral other than (x) Prior Liens, (y) the Liens and
security interests granted to the Collateral Agent under this Agreement and (z)
Permitted Encumbrances.

          Section 10. Reasonable Care. The Collateral Agent shall be deemed to
have exercised reasonable care in the custody and preservation of the Pledged
Collateral in its possession if such Pledged Collateral is accorded treatment
substantially equivalent to that which the Collateral Agent, in its individual
capacity, accords its own property, it being understood that the Collateral
Agent shall not have responsibility for taking any necessary steps to preserve
rights against any Person with respect to any Pledged Collateral.

          Section 11.  Events of Default; Remedies; Etc.

          (a) Event of Default. An event of default hereunder (an "Event of
Default") shall exist upon the occurrence of an Event of Default, as such term
is defined in the Credit Agreement.
<PAGE>
                                      -15-

          (b) Certain Actions After Default. If an Event of Default shall have
occurred, then and in every such case, the Collateral Agent may do any or all of
the following:

          (i) personally, or by agents or attorneys, immediately take possession
     of the Pledged Collateral or any part thereof, from any Pledgor or any
     other Person who then has possession of any part thereof, with or without
     notice or process of law, and for that purpose may enter upon such
     Pledgor's premises where any of the Pledged Collateral is located and
     remove such Pledged Collateral and use in connection with such removal any
     and all services, supplies, aids and other facilities of such Pledgor;

         (ii) instruct the obligor or obligors on any agreement, instrument or
     other obligation (including, without limitation, the Receivables and
     Contract Rights) constituting the Pledged Collateral to make any payment
     required by the terms of such instrument or agreement directly to the
     Collateral Agent; provided, however, that in the event that any such
     payments are made directly to any Pledgor, prior to receipt by any such
     obligor of such instruction, such Pledgor shall segregate all amounts
     received pursuant thereto in a separate account and pay the same promptly
     to the Collateral Agent;

        (iii) sell, assign or otherwise liquidate, or direct any Pledgor to
     sell, assign or otherwise liquidate, any or all investments made in whole
     or in part with the Pledged Collateral or any part thereof, and take
     possession of the proceeds of any such sale, assignment or liquidation; and

         (iv) take possession of the Pledged Collateral or any part thereof, by
     directing any Pledgor in writing to deliver the same to the Collateral
     Agent at any place or places so designated by the Collateral Agent, in
     which event such Pledgor shall at its own expense (A) forthwith cause the
     same to be moved to the place or places designated by the Collateral Agent
     and there delivered to the Collateral Agent; (B) store and keep any Pledged
     Collateral so delivered to the Collateral Agent at such place or places
     pending further action by the Collateral Agent; and (C) while the Pledged
     Collateral shall be so stored and kept, provide such security and
     maintenance services as shall be necessary to protect the same and to
     preserve and maintain them in good condition (ordinary wear and tear
<PAGE>
                                      -16-

     excepted). Each Pledgor's obligation to deliver the Pledged Collateral is
     of the essence of this Agreement. Upon application to a court of equity
     having jurisdiction, the Collateral Agent shall be entitled to a decree
     requiring specific performance by any Pledgor of such obligation.

          (c) Certain Additional Actions Regarding Intellectual Property. If any
Event of Default shall have occurred, upon the written demand of the Collateral
Agent, each Pledgor shall execute and deliver to the Collateral Agent an
assignment or assignments of the registered Patents, Trademarks and/or
Copyrights and such other documents as are necessary or appropriate to carry out
the intent and purposes of this Agreement. Within five Business Days of written
notice thereafter from the Collateral Agent, each Pledgor shall make available
to the Collateral Agent, to the extent within such Pledgor's power and
authority, such personnel in such Pledgor's employ on the date of the Event of
Default as the Collateral Agent may reasonably designate to permit such Pledgor
to continue, directly or indirectly, to produce, advertise and sell the products
and services sold by such Pledgor under the registered Patents, Trademarks
and/or Copyrights, and such persons shall be available to perform their prior
functions on the Collateral Agent's behalf.

          (d) Dispositions of Pledged Collateral. Upon the occurrence of an
Event of Default, the Collateral Agent may from time to time exercise in respect
of the Pledged Collateral, in addition to other rights and remedies provided for
herein or otherwise available to it, all the rights and remedies of a secured
party under the Code at the time of an event of default, and the Collateral
Agent may also, without notice except as specified below, sell the Pledged
Collateral or any part thereof in one or more parcels at public or private sale,
at any exchange, broker's board or at any of the Collateral Agent's offices or
elsewhere, for cash, on credit or for future delivery, and at such price or
prices and upon such other terms as the Collateral Agent may deem commercially
reasonable. The Secured Parties or any of their respective affiliates may be the
purchaser of any or all of the Pledged Collateral at any such sale and shall be
entitled, for the purpose of bidding and making settlement or payment of the
purchase price for all or any portion of the Pledged Collateral sold at such
sale, to use and apply any of the Secured Obligations owed to such Person as a
credit on account of the purchase price of any Pledged Collateral payable by
such Person at such sale. Each purchaser at any such sale shall acquire the
property sold absolutely free
<PAGE>
                                      -17-

from any claim or right on the part of any Pledgor, and each Pledgor hereby
waives, to the fullest extent permitted by law, all rights of redemption, stay
and/or appraisal which it now has or may at any time in the future have under
any rule of law or statute now existing or hereafter enacted. The Collateral
Agent shall not be obligated to make any sale of Pledged Collateral regardless
of notice of sale having been given. The Collateral Agent may adjourn any public
or private sale from time to time by announcement at the time and place fixed
therefor, and such sale may, without further notice, be made at the time and
place to which it was so adjourned. Each Pledgor hereby waives, to the fullest
extent permitted by law, any claims against the Collateral Agent arising by
reason of the fact that the price at which any Pledged Collateral may have been
sold at such a private sale was less than the price which might have been
obtained at a public sale, even if the Collateral Agent accepts the first offer
received and does not offer such Pledged Collateral to more than one offeree.

          (e) Certain Notices. Each Pledgor agrees that, to the extent notice of
sale shall be required by law, five Business Days' prior written notice from the
Collateral Agent of the time and place of any public sale or of the time after
which a private sale or other intended disposition is to take place shall be
commercially reasonable notification of such matters.

          (f) Waiver of Claims. Each Pledgor hereby waives, to the full extent
permitted by applicable law and except as otherwise provided in this Agreement,
notice or judicial hearing in connection with the Collateral Agent's taking
possession or the Collateral Agent's disposition of any of the Pledged
Collateral, including, without limitation, any and all prior notice and hearing
for any prejudgment remedy or remedies and any such right which any Pledgor
would otherwise have under law, and each Pledgor hereby further waives, to the
full extent permitted by applicable law: (i) all damages occasioned by such
taking of possession; (ii) all other requirements as to the time, place and
terms of sale or other requirements with respect to the enforcement of the
Collateral Agent's rights hereunder; and (iii) all rights of redemption,
appraisal, valuation, stay, extension or moratorium now or hereafter in force
under any applicable law. Any sale of, or the grant of options to purchase, or
any other realization upon, any Pledged Collateral in the exercise of remedies
pursuant to this Agreement shall operate to divest all right, title, interest,
claim and demand, either at law or in equity, of any Pledgor therein and
<PAGE>
                                      -18-

thereto, and shall be a perpetual bar both at law and in equity against such
Pledgor and against any and all Persons claiming or attempting to claim the
Pledged Collateral so sold, optioned or realized upon, or any part thereof,
from, through or under any Pledgor.

          (g) Deficiency. Notwithstanding any other provision of this Agreement
to the contrary, if, after giving effect to any sale, transfer or other
disposition of any or all of the Pledged Collateral pursuant hereto and after
the application of the proceeds hereunder and any Pledged Collateral sold,
transferred or otherwise disposed of pursuant to any other Credit Document to
the Secured Obligations, any Secured Obligations remain unpaid or unsatisfied,
each Pledgor shall remain liable for the unpaid and unsatisfied amount of such
Secured Obligations for which such Pledgor is otherwise liable pursuant to any
Credit Document.

          Section 12. Application of Proceeds. The proceeds received by the
Collateral Agent in respect of any sale of, collection from or other realization
upon all or any part of the Pledged Collateral pursuant to the exercise by the
Collateral Agent of its remedies as a secured creditor as provided in Section 11
hereof shall be, without prior notice to or assent by any Pledgor, applied
together with any other sums then held by the Collateral Agent pursuant to this
Agreement as follows:

          FIRST, to the payment of all costs and expenses, fees, commissions and
     taxes of such sale, collection or other realization, including, without
     limitation, compensation to Collateral Agent and its agents and the
     reasonable fees and expenses of its counsel, and all expenses, liabilities
     and advances made or incurred by Collateral Agent in connection therewith,
     together with interest on each such amount at the highest rate then in
     effect under the Credit Agreement from and after the date such amount is
     due, owing or unpaid until paid in full;

          SECOND, to the payment of all other costs and expenses of such sale,
     collection or other realization, including, without limitation,
     compensation to the Secured Parties and their agents and the reasonable
     fees and expenses of their counsel and all costs, liabilities and
     indebtedness made or incurred by the Secured Parties in connection
     therewith, together with interest on each such amount at the highest rate
     then in effect under the Credit
<PAGE>
                                      -19-

     Agreement from and after the date such amount is due, owing or unpaid until
     paid in full;

          THIRD, to the indefeasible payment in full in cash of interest and all
     amounts other than principal under the Credit Agreement at any time and
     from time to time owing by the Pledgors under or in connection with the
     Credit Agreement or the Guarantee, ratably according to the unpaid amounts
     thereof, without preference or priority of any kind among amounts so due
     and payable, together with interest on each such amount at the highest rate
     then in effect under the Credit Agreement from and after the date such
     amount is due, owing or unpaid until paid in full;

          FOURTH, to the indefeasible payment in full in cash of principal at
     any time and from time to time owing by the Pledgors under or in connection
     with the Credit Agreement or the Guarantee, ratably according to the unpaid
     amounts thereof, without preference or priority of any kind, among amounts
     of principal so due and payable, together with interest on each such amount
     at the highest rate then in effect under the Credit Agreement from and
     after the date such amount is due, owing or unpaid until paid in full; and

          FIFTH, to the Pledgors, or their successors or assigns, or to
     whomsoever may be lawfully entitled to receive the same or as a court of
     competent jurisdiction may direct, of any surplus then remaining from such
     proceeds.

          Section 13. Expenses. Each Subsidiary Pledgor with respect to itself,
and the Borrower with respect to itself and jointly and severally with respect
to all the Subsidiary Pledgors, will upon demand pay to the Collateral Agent the
amount of any and all expenses of the Collateral Agent in connection with the
Agreement in accordance with Section 12.07 of the Credit Agreement. All amounts
payable by any Pledgor under this Section 13 shall be due upon demand and shall
be part of the Secured Obligations. Each Pledgor's obligations under this
Section shall survive the termination of this Agreement and the discharge of the
Secured Obligations.

          Section 14.  No Waiver; Cumulative Remedies.

          (a) No failure on the part of the Collateral Agent to exercise, no
course of dealing with respect to, and no delay
<PAGE>
                                      -20-

on the part of the Collateral Agent in exercising, any right, power or remedy
hereunder shall operate as a waiver thereof; nor shall any single or partial
exercise of any such right, power or remedy hereunder preclude any other or
further exercise thereof or the exercise of any other right, power or remedy.
The remedies herein provided are cumulative and are not exclusive of any
remedies provided by law.

          (b) In the event the Collateral Agent shall have instituted any
proceeding to enforce any right, power or remedy under this Agreement by sale or
otherwise, and such proceeding shall have been discontinued or abandoned for any
reason or shall have been determined adversely to the Collateral Agent, then and
in every such case, each Pledgor, the Collateral Agent and each Bank shall,
subject to any determination in such proceeding, be restored to its respective
former position and right hereunder with respect to the Pledged Collateral, and
all rights, remedies and powers of the Collateral Agent and Banks shall continue
as if no such proceeding had been instituted.

          Section 15. The Collateral Agent. Collateral Agent has been appointed
as collateral agent pursuant to the Credit Agreement. The actions of Collateral
Agent hereunder are subject to the provisions of the Credit Agreement.
Collateral Agent shall have the right hereunder to make demands, to give
notices, to exercise or refrain from exercising any rights, and to take or
refrain from taking action (including, without limitation, the release or
substitution of Pledged Collateral), in accordance with this Agreement and the
Credit Agreement. Collateral Agent may resign and a successor Collateral Agent
may be appointed in the manner provided in the Credit Agreement. Upon the
acceptance of any appointment as Collateral Agent by a successor Collateral
Agent, that successor Collateral Agent shall thereupon succeed to and become
vested with all the rights, powers, privileges and duties of the retiring
Collateral Agent under this Agreement, and the retiring Collateral Agent shall
thereupon be discharged from its duties and obligations under this Agreement.
After any retiring Collateral Agent's resignation, the provisions of this
Agreement shall inure to its benefit as to any actions taken or omitted to be
taken by it under this Agreement while it was Collateral Agent.

          Section 16. Collateral Agent May Perform; Collateral Agent Appointed
Attorney-in-Fact. If any Pledgor shall fail to do any act or thing that it has
covenanted to do hereunder or if any warranty on the part of any Pledgor
contained herein shall be breached, Collateral Agent or any Secured Party may
<PAGE>
                                      -21-

(but shall not be obligated to), upon notice to any such Pledgor, do the same or
cause it to be done or remedy any such breach, and may expend funds for such
purpose. Any and all amounts so expended by Collateral Agent or such Secured
Party shall be paid by such Pledgor promptly upon demand therefor, with interest
at the highest rate then in effect under the Credit Agreement during the period
from and including the date on which such funds were so expended to the date of
repayment. Each Pledgor's obligations under this Section 16 shall survive the
termination of this Agreement and the discharge of such Pledgor's other
obligations under the Credit Agreement and any other Credit Document. Each
Pledgor hereby appoints Collateral Agent its attorney-in-fact, with full
authority in the place and stead of such Pledgor and in the name of such
Pledgor, or otherwise, from time to time during the continuance of an Event of
Default or at any other time that such Pledgor has failed, after notice from
Collateral Agent, to take any action required to be taken by it hereunder, in
Collateral Agent's discretion to take any action and to execute any instrument
consistent with the terms of this Agreement and the Credit Agreement which the
Collateral Agent may deem necessary or advisable to accomplish the purposes of
this Agreement. The foregoing grant of authority is a power of attorney coupled
with an interest and such appointment shall be irrevocable for the term of this
Agreement. Each Pledgor hereby ratifies, to the fullest extent permitted by law,
all that such attorney shall lawfully do or cause to be done by virtue hereof.

          Section 17.  Indemnity.

          (a) Indemnity. Each Subsidiary Pledgor with respect to itself, and the
Borrower with respect to itself and jointly and severally with respect to the
Subsidiary Pledgors, agrees to indemnify, pay and hold harmless the Collateral
Agent and each of the Secured Parties in accordance with the provisions of
Section 12.01 of the Credit Agreement. To the extent that the undertaking to
indemnify, pay and hold harmless set forth in the preceding sentence may be
unenforceable because it is violative of any law or public policy, each Pledgor
shall contribute the maximum portion which it is permitted to pay and satisfy
under applicable law, to the payment and satisfaction of all indemnified
liabilities incurred by the indemnities or any of them.

          (b) Survival. The obligations of each Pledgor con- tained in this
Section 17 shall survive the termination of this
<PAGE>
                                      -22-

Agreement and the discharge of such Pledgor's other obligations under this
Agreement and the other Credit Documents.

          (c) Reimbursement. Any amounts paid by any Indemnitee as to which such
indemnitee has the right to reimbursement shall constitute Secured Obligations
secured by the Pledged Collateral.

          Section 18. Modification in Writing. No amendment, modification,
supplement, termination or waiver of or to any provision of this Agreement, or
consent to any departure by any Pledgor therefrom, shall be effective unless the
same shall be done in accordance with the terms of this Agreement and the Credit
Agreement. Any amendment, modification or supplement of or to any provision of
this Agreement, any waiver of any provision of this Agreement, and any consent
to any departure by any Pledgor from the terms of any provision of this
Agreement, shall be effective only in the specific instance and for the specific
purpose for which made or given. Except where notice is specifically required by
this Agreement, no notice to or demand on any Pledgor in any case shall entitle
any such Pledgor to any other or further notice or demand in similar or other
circumstances.

          Section 19.  Termination; Releases.

          When all the Secured Obligations have been paid in full and the
Commitments of the Banks to make any Loan or to issue any Letter of Credit under
the Credit Agreement have expired, this Agreement shall terminate. Upon
termination of this Agreement or any release of Pledged Collateral in accordance
with the provisions of the Credit Agreement, the Collateral Agent shall, upon
the request and at the sole cost and expense of any Pledgor, forthwith assign,
transfer and deliver to such Pledgor, against receipt and without recourse to or
warranty by Collateral Agent, such of the Pledged Collateral to be released (in
the case of a release) as may be in possession of Collateral Agent and as shall
not have been sold or otherwise applied pursuant to the terms hereof, and, with
respect to any other Pledged Collateral, proper instruments (including, without
limitation, Uniform Commercial Code termination statements on Form UCC-3)
acknowledging the termination of this Agreement or the release of such Pledged
Collateral, as the case may be.

          Section 20. Definitions. The following terms shall have the following
meanings. Such definitions shall be equally
<PAGE>
                                      -23-

applicable to the singular and plural forms of the terms defined.

          "Asset Sale" has the meaning assigned to such term in
the Credit Agreement.

          "Code" means the Uniform Commercial Code as enacted in any and all
relevant jurisdictions, as then in effect.

          "Contract Rights" means all contract rights of any kind or character,
including, without limitation, all contract rights in respect of reserves,
deferred payments, deposits, refunds, non-cash Proceeds of Assets Sales and all
claims of every kind and character in any way relating to any Pledgor and the
Pledged Collateral other than (i) leases of real property, and (ii) other
contracts or agreements which by their terms expressly and unconditionally
prohibit assignment, transfer or the grant of a security interest therein by any
Pledgor or give the other party thereto the right to terminate the same upon an
assignment or transfer thereof, or the grant of a security interest therein and
shall only extend to any such contract or agreement to the extent such
assignment, transfer or grant of a security interest therein is permitted by
applicable law.

          "Copyrights" means all copyrights, whether statutory or common law,
including, without limitation, the copyrights listed on Schedule E hereto, along
with any and all (i) renewals and extensions thereof, (ii) income, royalties,
damages and payments now and hereafter due and/or payable with respect thereto,
including, without limitation, damages and payments for past or future
infringements thereof, and (iii) rights to sue for past, present and future
infringements thereof.

          "Documents" means all "documents", as defined in the Code and all
books, records, ledgers, printouts, computer recording media, data files, tapes,
file materials and other papers containing information relating to (a)
Receivables and any account debtors, beneficiaries and subcontractors in respect
thereof and (b) all other Pledged Collateral.

          "Equipment" means "equipment" as such term is defined in the Code, and
in any event shall include all equipment (other than motor vehicles), wherever
located in the United States of America, including, without limitation, the
items set forth on Schedule I hereto, all Drilling Rigs and Related Equipment,
machinery, office machines, furniture, conveyors,
<PAGE>
                                      -24-

tools, materials, storage and handling equipment, transmitting and receiving
equipment, and all other equipment of every kind and nature, wherever situated,
and owned by any Pledgor or in which any Pledgor may have any interest (to the
extent of such interest), all modifications, alterations, repairs,
substitutions, additions and accessions thereto, all replacements and all parts
therefor, and together with all substitutes for any of the foregoing.

          "General Intangibles" shall mean "general intangibles", as such term
is defined in the Code, and, in any event shall include, without limitation, all
manuals, blueprints, know-how, warranties and records in connection with the
Equipment; all documents of title or documents representing the Inventory and
all records, files and writings with respect thereto; any and all other rights,
claims and causes of action of any Pledgor against any other Person and the
benefits of any and all collateral or other security given by any other Person
in connection therewith, including, without limitation, all Contract Rights; all
information, customer lists, identification of suppliers, data, plans,
blueprints, specification designs, drawings, recorded knowledge, surveys,
engineering reports, test reports, manuals, materials, standards, processing
standards, performance standards, catalogs, research data, computer and
automatic machinery software and programs, and the like pertaining to operations
by any Pledgor; all information relating to sales of products now or hereafter
manufactured, distributed or franchised by any Pledgor; all accounting
information pertaining to any Pledgor's operations or any of the Equipment,
Inventory, Receivables or General Intangibles and all media in which or on which
any of the information or knowledge or data or records relating to such
operations or any of the Equipment, Inventory, Receivables, Contract Rights or
General Intangibles may be recorded or stored and all computer programs used for
the compilation or printout of such information, knowledge, records or data; all
rights and goodwill of any Pledgor; all licenses, consents, permits, variances,
certifications and approvals of governmental agencies now or hereafter held by
any Pledgor pertaining to operations now or hereafter conducted by any Pledgor
or assets now or hereafter held by any Pledgor; all causes of action, claims and
warranties now or hereafter owned or acquired by any Pledgor; and any other
property consisting of a general intangible under the Code applicable in such
other location where any Pledgor maintains its records relating to such
property.
<PAGE>
                                      -25-

          "Instrument" means "instrument" as such term is defined under the
Code.

          "Intellectual Property" has the meaning assigned to such term in
Section 5(g) of this Agreement.

          "Inventory" means all inventory of any Pledgor, wherever located, and
whether now existing or hereafter acquired, including without limitation, all
raw materials, work in progress, returned goods, finished goods, samples and
consigned goods to the extent of the consignee's interest therein, and otherwise
as determined in accordance with GAAP.

          "Licenses" means all license agreements with any other party with
respect to a Patent, Trademark or Copyright, including, without limitation, the
license agreements listed on Schedule F hereto, along with any and all (i)
renewals, extensions, supplements and continuations thereof, (ii) income,
royalties, damages and payments now and hereafter due and/or payable to any
Pledgor with respect thereto, including, without limitation, damages and
payments for past or future infringements or violations thereof and (iii) rights
to sue for past, present and future infringements or violations thereof other
than any license agreement or covenant not to sue which by its terms expressly
and unconditionally prohibits the assignment or transfer thereof, or the grant
of a security interest therein or gives the other party thereto the right to
terminate the same upon an assignment or transfer thereof, or the grant of a
security interest therein and shall only extend to such license agreement or
covenant not to sue to the extent such assignment, transfer or grant of a
security interest therein is permitted by applicable law.

          "Patents" means all patents and patent applications, including,
without limitation, the patents and patent applications listed on Schedule G
hereto, along with any and all (i) inventions and improvements described and
claimed therein, (ii) reissues, divisions, continuations, renewals, extensions
and continuations-in-part thereof, (iii) income, royalties, damages and payments
now and hereafter due and/or payable under and with respect thereto, including,
without limitation, damages and payments for past or future infringements
thereof, and (iv) rights to sue for past, present and future infringements
thereof.

          "Pension Plan Reversions" means any Pledgor's right to receive the
surplus funds, if any, which are payable to such
<PAGE>
                                      -26-

Pledgor following the termination of any employee pension plan and the
satisfaction of all liabilities of participants and beneficiaries under such
plan in accordance with applicable law.

          "Permits" means all permits, licenses, certificates, approvals and
authorizations, however characterized, issued or in any way furnished by a
Governmental Authority in connection with the business operations of each
Pledgor or any other Pledged Collateral other than any permit, license or
approval which by its terms expressly and unconditionally prohibits the
assignment or transfer thereof, or the grant of a security interest therein or
gives the other party thereto the right to terminate the same upon an assignment
or transfer thereof, or the grant of a security interest therein and shall only
extend to such permit, license or approval to the extent such assignment,
transfer or grant of a security interest therein is permitted by applicable law.

          "Permitted Encumbrances" means liens of the type described in clauses
(a), (b), (e), (f), (h), (i), (j), (k) and (l) of the definition of Permitted
Liens in the Credit Agreement.

          "Proceeds" has the meaning assigned to such term under the Code and,
in any event, includes, without limitation, any and all (i) proceeds of any
insurance (except payments made to a Person which is not a party to this
Agreement), indemnity, warranty or guaranty payable to the Collateral Agent or
to any Pledgor from time to time with respect to any of its respective Pledged
Collateral, (ii) payments (in any form whatsoever) made or due and payable to
any Pledgor from time to time in connection with any requisition, confiscation,
condemnation, seizure or forfeiture of all or any part of its respective Pledged
Collateral by any Governmental Authority (or any person acting on behalf of a
Governmental Authority), (iii) instruments representing obligations to pay
amounts in respect of any Pledged Collateral, and (iv) other amounts from time
to time paid or payable under or in connection with any Pledged Collateral.

          "Receivables" means all of each Pledgor's rights to payment for goods
sold or leased or services performed by such Pledgor or any other party, whether
now in existence or arising from time to time hereafter, including, without
limitation, rights evidenced by an account, contract, security, agreement,
chattel paper, or other evidence of indebtedness or security, together with (i)
all security pledged, assigned, hypothecated
<PAGE>
                                      -27-

or granted to or held by any Pledgor to secure the foregoing, (ii) General
Intangibles arising out of any Pledgor's rights in any goods, the sale of which
gave rise thereto; (iii) all guarantees, endorsements and indemnifications on,
or of, any of the foregoing, (iv) all powers of attorney for the execution of
any evidence of indebtedness or security or other writing in connection
therewith, and (v) all evidences of the filing of financing statements and other
statements and the registration of other instruments in connection therewith and
amendments thereto, notices to other creditors or secured parties, and
certificates from filing or other registration officers including, without
limitation, all the items described above which are payable by any Affiliate of
any Pledgor to any Pledgor.

          "Trademarks" means all trademarks (including service marks), trademark
registrations and trade names and applications therefor, including, without
limitation, the trademark registrations and applications therefor listed on
Schedule H hereto, along with any and all (i) renewals thereof, and (ii) income,
royalties, damages and payments now and hereafter due and/or payable with
respect thereto, including, without limitation, damages and payments for past or
future infringements thereof, and (iii) rights to sue for past, present and
future infringements thereof.

          Section 21. Notices. All notices or other communications herein
required to be given shall be given at the address and in the manner required in
the Credit Agreement.

          Section 22. Continuing Security Interest; Assignment. This Agreement
shall create continuing security interests in the Pledged Collateral and shall
(i) be binding upon each Pledgor, its successors and assigns, and (ii) inure to
the benefit of the Collateral Agent and the Secured Parties and their respective
successors and assigns; no other Persons (including, without limitation, any
other creditor of any Pledgor) shall have any interest herein or any right or
benefit with respect hereto.

          Section 23. GOVERNING LAW; TERMS. THIS AGREEMENT SHALL BE GOVERNED BY,
AND SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH, THE LAW OF THE STATE OF
NEW YORK, WITHOUT REGARD TO PRINCIPLES OF CONFLICT OF LAWS EXCEPT TO THE EXTENT
THAT THE VALIDITY OR PERFECTION OF THE SECURITY INTERESTS HEREUNDER, OR REMEDIES
HEREUNDER, IN RESPECT OF ANY PARTICULAR PROPERTY ARE GOVERNED BY THE LAWS OF A
JURISDICTION OTHER THAN THE STATE OF NEW YORK.
<PAGE>
                                      -28-

          Section 24. CONSENT TO JURISDICTION; WAIVER OF JURY TRIAL; FORUM NON
CONVENIENS. ALL JUDICIAL PROCEEDINGS BROUGHT AGAINST ANY PLEDGOR WITH RESPECT TO
THIS AGREEMENT MAY BE BROUGHT IN ANY STATE OR FEDERAL COURT OF COMPETENT
JURISDICTION IN THE STATE OF NEW YORK AND BY EXECUTION AND DELIVERY OF THIS
AGREEMENT EACH PLEDGOR ACCEPTS FOR ITSELF AND IN CONNECTION WITH ITS PROPERTIES,
GENERALLY AND UNCONDITIONALLY, THE NONEXCLUSIVE JURISDICTION OF THE AFORESAID
COURTS, AND IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED THEREBY IN
CONNECTION WITH THIS AGREEMENT. EACH PARTY HERETO HEREBY IRREVOCABLY WAIVES
TRIAL BY JURY, AND EACH PARTY HERETO HEREBY IRREVOCABLY WAIVES ANY OBJECTION,
INCLUDING, WITHOUT LIMITATION, ANY OBJECTION TO THE LAYING OF VENUE OR BASED ON
THE GROUNDS OF FORUM NON CONVENIENS, WHICH IT MAY NOW OR HEREAFTER HAVE TO THE
BRINGING OF ANY SUCH ACTION OR PROCEEDING IN SUCH RESPECTIVE JURISDICTIONS.

          Section 25. Severability of Provisions. Any provision of this
Agreement which is prohibited or unenforceable in any jurisdiction shall, as to
such jurisdiction, be ineffective to the extent of such prohibition or
unenforceability without invalidating the remaining provisions hereof or
affecting the validity or enforceability of such provision in any other
jurisdiction.

          Section 26. Execution in Counterparts. This Agreement and any
amendments, waivers, consents or supplements hereto may be executed in any
number of counterparts and by different parties hereto in separate counterparts,
each of which when so executed and delivered shall be deemed to be an original,
but all such counterparts together shall constitute one and the same agreement.

          Section 27. Headings. The Section headings used in this Agreement are
for convenience of reference only and shall not affect the construction of this
Agreement.

          Section 28. Obligations Absolute. All obligations of each Pledgor
hereunder shall be absolute and unconditional irrespective of:

          (i) any bankruptcy, insolvency, reorganization, arrangement,
     readjustment, composition, liquidation or similar event of any other
     Pledgor;
<PAGE>
                                      -29-

         (ii) any lack of validity or enforceability of the Credit Agreement,
     any other Credit Document or any other agreement or instrument relating
     thereto;

        (iii) any change in the time, manner or place of payment of, or in any
     other term of, all or any of the Secured Obligations, or any other
     amendment or waiver of or any consent to any departure from the Credit
     Agreement, any other Credit Document or any other agreement or instrument
     relating hereto or thereto;

         (iv) any exchange, release or non-perfection of any other collateral or
     the pledge of any additional collateral or the failure to recover in
     respect thereof pursuant to any remedy or right of the Collateral Agent or
     any Bank contained in this Agreement, the Credit Agreement, or any release
     or amendment or waiver of or consent to any departure from any guarantee,
     for all or any of the Secured Obligations;

          (v) any exercise or non-exercise, or any waiver of any right, remedy,
     power or privilege under or in respect of this Agreement or the Credit
     Agreement, except as specifically set forth in a waiver granted pursuant to
     the provisions of Section 18 hereof; or

         (vi) any other circumstances which might otherwise constitute a defense
     available to, or a discharge of, any other Pledgor.

          Section 29. The Collateral Agent's Right To Sever Indebtedness.

          (a) Each Pledgor acknowledges that (i) the Pledged Collateral pledged
by it does not constitute the sole source of security for the payment and
performance of the Secured Obligations and that the Secured Obligations are also
secured by other types of property of such Pledgor and its affiliates in other
jurisdictions, (ii) the number of such jurisdictions and the nature of the
transaction of which this instrument is a part are such that it would have been
impracticable for the parties to allocate to each item of the Pledged Collateral
a specific amount of indebtedness and to execute in respect of such item a
separate credit agreement and (iii) each Pledgor intends that the Collateral
Agent have the same rights with respect to the Pledged Collateral pledged by it,
in any judicial proceeding relating to the exercise of any right or remedy
<PAGE>
                                      -30-

hereunder or otherwise, that the Collateral Agent would have had if each item of
collateral had been pledged or encumbered pursuant to a separate credit
agreement or security instrument. In furtherance of such intent, each Pledgor
agrees to the greatest extent permitted by law that, from and after the
occurrence of an Event of Default, the Collateral Agent may at any time by
notice (an "Allocation Notice") to any Pledgor allocate a portion of the Secured
Obligations (the "Allocated Indebtedness") to the Pledged Collateral of such
Pledgor and sever from the remaining Secured Obligations the Allocated
Indebtedness. From and after the giving of an Allocation Notice with respect to
any portion of the Pledged Collateral, the Secured Obligations hereunder shall
be limited to the extent set forth in the Allocation Notice and (as so limited)
shall, for all purposes, be construed as a separate credit obligation of such
Pledgor unrelated to the other transactions contemplated by the Credit
Agreement. To the extent that the proceeds of any judicial proceeding relating
to the exercise of any right or remedy hereunder of the Pledged Collateral shall
exceed the Allocated Indebtedness, such proceeds shall belong to such Pledgor
and shall not be available hereunder to satisfy any Secured Obligations of such
Pledgor other than the Allocated Indebtedness. In any action or proceeding to
exercise any right or remedy under this Agreement which is commenced after the
giving by the Collateral Agent of an Allocation Notice, the Allocation Notice
shall be conclusive proof of the limits of the Secured Obligations hereby
secured, and any Pledgor may introduce, by way of defense or counterclaim,
evidence thereof in any such action or proceeding. Notwithstanding any provision
of this Section 29, the proceeds received by the Collateral Agent pursuant to
this Agreement shall be applied by the Collateral Agent in accordance with the
provisions of Section 12 hereof.

          (b) Each Pledgor hereby waives to the fullest extent permitted by law
the right to a discharge of any of the Secured Obligations under any statute or
rule of law now or hereafter in effect which provides that the exercise of any
particular right or remedy as provided for herein (by judicial proceedings or
otherwise) constitutes the exclusive means for satisfaction of the Secured
Obligations or which makes unavailable any further judgment or any other right
or remedy provided for herein because the Collateral Agent elected to proceed
with the exercise of such initial right or remedy or because of any failure by
the Collateral Agent to comply with laws that prescribe conditions to the
entitlement to such subsequent judgment or the availability of such subsequent
right or remedy. In the event
<PAGE>
                                      -31-

that, notwithstanding the foregoing waiver, any court shall for any reason hold
that such subsequent judgment or action is not available to the Collateral
Agent, no Pledgor shall (i) to the extent permitted by applicable law, introduce
in any other jurisdiction any judgment so holding as a defense to enforcement
against such Pledgor of any remedy in the Credit Agreement or any other Credit
Document or (ii) seek to have such judgment recognized or entered in any other
jurisdiction, and any such judgment shall in all events be limited in
application only to the state or jurisdiction where rendered and only with
respect to the Collateral referred to in such judgment.

          (c) In the event any instrument in addition to the Allocation Notice
is necessary to effectuate the provisions of this Section 29, including, without
limitation, any amendment to this Agreement, any substitute promissory note or
affidavit or certificate of any kind, each Pledgor agrees that it shall execute
and deliver any such instrument reasonably requested by the Collateral Agent so
long as such instrument is consistent with the terms of the Credit Documents.

          Section 30. Future Advances. Without releasing or in any way impairing
any of the Secured Obligations existing as of the date hereof, this Agreement
shall secure the obligations of the Borrowers and the Subsidiary Pledgors in
respect of any Loans made and any Letters of Credit issued on or after the date
hereof pursuant to the terms of the Credit Agreement.
<PAGE>
          IN WITNESS WHEREOF, each Pledgor and the Collateral Agent have caused
this Agreement to be executed and delivered by its duly authorized officer as of
the date first above written.

                         DI INDUSTRIES, INC.

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

                         DRILLERS, INC.

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

                             DI INTERNATIONAL, INC.

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

                             BANKERS TRUST COMPANY,
                               as Collateral Agent

                         By:
                              --------------------------------
                              Name:
                              Title:
<PAGE>
                          SCHEDULE A

                    Property Subject
Pledgor             to Lien                 Related Agreements
- ------              ----------------        ------------------
<PAGE>
                                   SCHEDULE B


                        Principal Place               Chief Executive
Pledgor                 of Business                   Office
- ------                  ---------------               ---------------
Drillers Inc.           450 Gears Road                450 Gears Road
                        Houston, Texas  77067         Houston, Texas  77067

DI Industries, Inc.     450 Gears Road                450 Gears Road
                        Houston, Texas  77067         Houston, Texas  77067

DI International, Inc.  450 Gears Road                450 Gears Road
                        Houston, Texas  77067         Houston, Texas  77067
<PAGE>
                                   SCHEDULE C

Pledgor                                Location of Equipment and Inventory
- -------                                -----------------------------------
<PAGE>
                                   SCHEDULE D

Pledgor                             Trade Names
- ------                              -----------
<PAGE>
                                   SCHEDULE E

                               Claims of Copyright

                                      NONE
<PAGE>
                                   SCHEDULE F

                                    Licenses

                                      NONE
<PAGE>
                                   SCHEDULE G

                                     Patent

                                      NONE

                               Patent Applications

                                      NONE
<PAGE>
                                   SCHEDULE H

                             Trademark Registrations

                                      NONE

                    Applications for Trademark Registrations

                                      NONE

                                   Tradenames

                                      NONE
<PAGE>
                                       -2-

                                   SCHEDULE I

                                    Equipment

                                      NONE
<PAGE>
                                                                       EXHIBIT I
                                                                       ---------

                         OFFICER'S SOLVENCY CERTIFICATE
                         ------------------------------
                                                                          [Date]

Bankers Trust Company, as Agent and ING (US) Capital Corporation, as Co-Agent
 for the Banks party to the Credit Agreement referred to below
c/o Bankers Trust Company
One Bankers Trust Plaza
New York, New York  10006

Attention:

Ladies and Gentlemen:

          I, the undersigned, the chief financial officer of DI Industries,
Inc., a corporation organized and existing under the laws of the State of Texas
(the "Company") and Drillers, Inc., a corporation organized and existing under
the laws of the State of Texas ("DI" and together with the Company, the
"Borrowers"), do hereby certify on behalf of the Company that:

          1. This Certificate is furnished pursuant to Section 5.14(a) of the
Senior Secured Reducing Revolving Credit Agreement, dated as of December , 1996
among the Borrowers, each of the Subsidiary Guarantors a party thereto, the
lenders from time to time party thereto (the "Banks"), Bankers Trust Company, as
Agent and ING (US) Capital Corporation, as Co-Agent (such Credit Agreement, as
in effect on the date of this Certificate, being herein called the "Credit
Agreement"). Unless otherwise defined herein, capitalized terms used in this
Certificate shall have the meanings set forth in the Credit Agreement.

          2. For purposes of this Certificate, I, or officers of the Borrowers
under my direction and supervision, have reviewed such historical and pro forma
financial statements and other records and information related to the Borrowers
and the Guarantors and made such further inquiry, investigation and review as is
necessary to make this certificate.

          3. Based on and subject to the foregoing, I hereby certify on behalf
of the Borrowers that, both prior to and after giving effect to the Acquisition
and the incurrence of
<PAGE>
                                       -2-

all financings contemplated in the Credit Agreement, the Company and DI (on a
stand-alone basis) are not and will not be rendered insolvent or inadequately
capitalized for the respective businesses they intend to conduct and have not
and will not have incurred debts beyond their ability to pay as they mature and
that, upon consummation of the Acquisition, (x) the total assets of the Company
and DI exceed the amount necessary to pay all of its liabilities and to pay any
distribution preference on any outstanding preferred stock upon dissolution and
(y) the amount by which the total assets of the Company and DI exceeds and will
exceed its liabilities is no less than its respective stated capital; and that
neither the Company nor any of its Subsidiaries is entering into the Acquisition
or this Agreement with the intent to hinder, delay or defraud any creditor of
the Company or any of its Subsidiaries.

          4.   Attached hereto is a report from [a third party] pursuant to 
Section 5.14(b) of the Credit Agreement.
<PAGE>
                                       -3-

          IN WITNESS WHEREOF, the Borrowers have caused their duly authorized
chief financial officer to execute and deliver this Certificate this ____ day of
December, 1996.

                              DI INDUSTRIES, INC.
                              DRILLERS, INC.

                                       By
                                   ----------------------------
                                   Name:
                                   Title:
<PAGE>
                                                                       EXHIBIT K
                                                                       ---------

          FORM OF ASSIGNMENT AND ASSUMPTION AGREEMENT
          -------------------------------------------

                                           DATE: ________, 19__

          Reference is made to the Senior Secured Reducing Revolving Credit
Agreement described in Item 2 of Annex I annexed hereto (as such Credit
Agreement may hereafter be amended, modified or supplemented from time to time,
the "Credit Agreement"). Unless defined in Annex I attached hereto, terms
defined in the Credit Agreement are used herein as therein defined.
__________________ (the "Assignor") and ___________________ (the "Assignee")
hereby agree as follows:

          1. The Assignor hereby sells and assigns to the Assignee without
recourse and without representation or warranty (other than as expressly
provided herein), and the Assignee hereby purchases and assumes from the
Assignor, that interest in and to all of the Assignor's rights and obligations
under the Credit Agreement as of the date hereof which represents the percentage
interest specified in Item 4(b) of Annex I (the "Assigned Share") of all of the
outstanding rights and obligations under the Credit Agreement relating to the
Assignor's Revolving Loan Commitment, including, without limitation, all rights
and obligations with respect to the Assigned Share of any outstanding Revolving
Loans and Letters of Credit.

          2. The Assignor (i) represents and warrants that it is the legal and
beneficial owner of the interest being assigned by it hereunder and that such
interest is free and clear of any liens or security interests; (ii) makes no
representation or warranty and assumes no responsibility with respect to any
statements, warranties or representations made in or in connection with the
Credit Agreement or the other Credit Documents or the execution, legality,
validity, enforceability, genuineness, sufficiency or value of the Credit
Agreement or the other Credit Documents or any other instrument or document
furnished pursuant thereto; and (iii) makes no representation or warranty and
assumes no responsibility with respect to the financial condition of the
Borrowers or any of their Subsidiaries or the performance or observance by the
Borrowers or any of their Subsidiaries of any of their respective obligations
under the Credit Agreement or the other Credit
<PAGE>
                                       -2-

Documents or any other instrument or document furnished pursuant thereto.

          3. The assignee (i) confirms that it has received a copy of the Credit
Agreement and the other Credit Documents, together with copies of the financial
statements referred to therein and such other documents and information as it
has deemed appropriate to make its own credit analysis and decision to enter
into this Assignment and Assumption Agreement; (ii) agrees that it will,
independently and without reliance upon the the Agent, the Co-Agent, the
Assignor or any other Bank and based on such documents and information as it
shall deem appropriate at the time, continue to make its own credit decisions in
taking or not taking action under the Credit Agreement; (iii) appoints and
authorizes the Agent and the Collateral Agent to take such action as agent on
its behalf and to exercise such powers under the Credit Agreement and the other
Credit Documents as are delegated to the Agent and the Collateral Agent by the
terms thereof, together with such powers as are reasonably incidental thereto;
and (iv) attaches the forms prescribed by the Internal Revenue Service of the
United States certifying as to the Assignee's status for purposes of determining
exemption from United States withholding taxes with respect to all payments to
be made to the Assignee under the Credit Agreement or such other documents as
are necessary to indicate that all such payments are subject to such rates at a
rate reduced by an applicable tax treaty.1

          4. Following the execution of this Assignment and Assumption Agreement
by the Assignor and the Assignee, an executed original hereof (together with all
attachments) will be delivered to the Agent. The effective date of this
Assignment and Assumption Agreement shall be the date of execution hereof by the
Assignor and the Assignee, and, to the extent required by the Credit Agreement,
the receipt of the consent of the Agent, receipt by the Agent of the assignment
fee referred to in Section 12.04(b) of the Credit Agreement and the registration
of the transfer on the Register as provided in Section 7.12 of the Credit
Agreement, or such later date as otherwise specified in Item 5 of Annex I (the
"Settlement Date").

          5. Upon the delivery of a fully executed original hereof to the Agent,
as of the Settlement Date, (i) the
- -------------------------
1    If the Assignee is organized under the laws of a jurisdiction outside the
     United States.
<PAGE>
                                       -3-

Assignee shall be a party to the Credit Agreement and, to the extent provided in
this Assignment and Assumption Agreement, have the rights and obligations of a
Bank thereunder and under the other Credit Documents and (ii) the Assignor
shall, to the extent provided in this Assignment and Assumption Agreement and
the Credit Agreement, relinquish its right and be released from its obligations
under the Credit Agreement and the other Credit Documents.

          6. It is agreed upon the effectiveness hereof, the Assignee shall be
entitled to (x) all interest on the Assigned Share of the Revolving Loans at the
rates specified in Item 6 of Annex I, (y) all Commitment Fees on the Assigned
Share of the Revolving Loan Commitment at the rate specified in Item 7 of Annex
I and (z) all Letter of Credit Fees on the Assignee's participation in all
Letters of Credit at the rate specified in Item 8 of Annex I, which, in each
case, accrue on and after the Settlement Date, such interest, Commitment Fees
and Letter of Credit Fees to be paid by the Agent directly to the Assignee. It
is further agreed that all payments of principal made on the Assigned Share of
the Revolving Loans which occur on and after the Settlement Date will be paid
directly by the Agent to the Assignee. Upon the Settlement Date, the Assignee
shall pay to the Assignor an amount specified by the Assignor in writing which
represents the Assigned Share of the principal amount of the Revolving Loans
made by the Assignor pursuant to the Credit Agreement which are outstanding on
the Settlement Date, net of any closing costs, and which are being assigned
hereunder. The Assignor and the Assignee shall make all appropriate adjustments
in payments under the Credit Agreement for periods prior to the Settlement Date
directly between themselves.

          7. THIS ASSIGNMENT AND ASSUMPTION AGREEMENT SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.
<PAGE>
                                       -4-

          IN WITNESS WHEREOF, the parties hereto have caused this Assignment and
Assumption Agreement to be executed by their respective officers thereunder duly
authorized, as of the date first above written, such execution also being made
on Annex I hereto.

                              [NAME OF ASSIGNOR],
                              as Assignor

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

                              [NAME OF ASSIGNEE],
                              as Assignee

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

[Acknowledged and Agreed:

BANKERS TRUST COMPANY

By
  -----------------------
  Title:]
<PAGE>
                                                                         ANNEX I
                                                                         -------

         ANNEX FOR ASSIGNMENT AND ASSUMPTION AGREEMENT

                                     ANNEX I

1.   The Borrowers:  DI Industries, Inc. and Drillers Inc.

2.   Name and Date of Credit Agreement:

     Senior Secured Reducing Revolving Credit Agreement, dated as of December ,
     1996, among the Borrowers, each of the Subsidiary Guarantors a party
     thereto, the Banks from time to time party thereto, Bankers Trust Company,
     as Agent and Administrative Agent and ING (US) Capital Corporation, as
     Co-Agent.

3.   Date of Assignment Agreement:

4.   Amounts (as of date of item #3 above):

                                             Total Revolving
                                             Loan Commitment

a.   Aggregate Amount for all Banks          $_________

b.   Assigned Share                          __________%

c.   Amount of Assigned Share                $_________

5.   Settlement Date:

6.   Rate of Interest         As set forth in Section 1.08 of
     to the Assignee:         the Credit Agreement (unless
                              otherwise agreed to by the
                              Assignor and the Assignee)2
- -------------------------
2    The Borrower and the Agent shall direct the entire amount of the interest
     to the Assignee at the rate set forth in Section 1.08 of the Credit
     Agreement, with the Assignor and Assignee effecting any agreed upon sharing
     of interest through payments by the Assignee to the Assignor.
<PAGE>
                                       -2-

7.   Commitment Fee           As set forth in Section 3.01(a)
     to the Assignee:         of the Credit Agreement (unless
                              otherwise agreed to by the
                              Assignor and the Assignee)3

8.   Letter of Credit         As set forth in Section 3.01(b)
     Fee to the Assignee:     of the Credit Agreement (unless
                              otherwise agreed to by the
                              Assignor and the Assignee)4

9.   Notice:

           ASSIGNEE:

              ======================
              ======================
              Attention:
              Telephone:
              Telecopier:
              Reference:

- -------------------------
3    The Borrower and the Agent shall direct the entire amount of the Commitment
     Fee to the Assignee at the rate set forth in Section 3.01(a) of the Credit
     Agreement, with the Assignor and the Assignee effecting any agreed upon
     sharing of the Commitment Fee through payment by the Assignee to the
     Assignor.

4    The Borrower and the Agent shall direct the entire amount of the applicable
     Letter of Credit Fee to the Assignee at the rate set forth in Section
     3.01(b) of the Credit Agreement with the Assignor and the Assignee
     effecting any agreed upon sharing of such Letter of Credit Fee through
     payment by the Assignee to the Assignor.
<PAGE>
                                       -3-

   Payment Instructions:

         ASSIGNEE:

              ======================
              ======================
              Attention:
              Reference:

Accepted and Agreed:

[NAME OF ASSIGNEE]                 [NAME OF ASSIGNOR]

By______________________           By________________________


  ----------------------             ------------------------
  (Print Name and Title)             (Print Name and Title)
<PAGE>
                                                                       EXHIBIT M

                               DI INDUSTRIES, INC.
                            FORM OF COLLATERAL REPORT

1.  Eligible Cash
    (from Schedule 1)                   ____________________

2.  Eligible Accounts Receivable
    (from Schedule 1)                   ____________________

3.  Inventory
    (from Schedule 1)                   ____________________

4.  (a) Fair Market Value
        of Domestic Drilling Rigs
        and Related Equipment
        (from most recent Appraisal
        attached hereto)                ____________________

    (b) Orderly Liquidation Value
        of Domestic Drilling Rigs
        and Related Equipment
        (from most recent Appraisal
        attached hereto)                ____________________

5.  Seventy-five percent (75%) of (2.)  ____________________

6.  Forty percent (40%) of (3.)         ____________________

7.  Forty percent (40%) of (4(a).)      ____________________

8.  Fifty percent (50%) of (4(b).)      ____________________

9.  Assets - sum of (1.), (5.), (6.)
    and the lesser of (7.) and (8.)     ____________________

10. Total Revolving Loan Commitment     ____________________
    (see Credit Agreement)

11. Ratio of (9.) to (10.)              ____________________
    (must be at least 1:1)
<PAGE>
                                       -1-

                                   SCHEDULE 1

                                COLLATERAL REPORT
                    Computation of Availability as of [date]

ELIGIBLE CASH

1.  Total Cash and Cash Equivalents
    (see Credit Agreement for defs.          _______________
     -balance sheet attached hereto)

2.  Less:  Cash and Cash Equivalents
    held by Foreign Subsidiaries             _______________

3.  Less:                                        $10,000,000

    TOTAL ELIGIBLE CASH (if positive):       _______________

ELIGIBLE ACCOUNTS RECEIVABLE

1.  Gross accounts receivable of Company
    and its Domestic Subsidiaries
    (as of last month-end - see balance
     sheet/financial stmt. attached hereto)  _______________

2.  Less:
    (a) Receivables from account debtors
        not located within the 48 con-
        tiguous states ("Debtors")           _______________

    (b) Receivables of Debtors that
        are more than 90 days past the
        original invoice date                _______________

    (c) Other receivables declared
        ineligible by the Agent or Co-
        Agent as provided for in the
        Credit Agreement                     _______________


    TOTAL ELIGIBLE ACCOUNTS RECEIVABLE:      _______________
<PAGE>
                                       -2-

INVENTORY

1.  Inventory (as of last month end
    (see financial stmts. attached hereto)   _______________

2.  Less:
    - Not located in 48 contiguous states    _______________


    TOTAL INVENTORY:                         _______________


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission