DRILEX INTERNATIONAL INC
8-K, 1997-04-18
OIL & GAS FIELD SERVICES, NEC
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<PAGE>   1
                       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): April 16, 1997



                            DRILEX INTERNATIONAL INC.
             (Exact name of registrant as specified in its charter)



         DELAWARE                     1-20689                76-0438889
 (State of Incorporation)     (Commission File Number)     (I.R.S. Employer
                                                        Identification Number)


                                15151 SOMMERMEYER
                                 HOUSTON, TEXAS
                    (Address of principal executive offices)

                                      77041
                                   (Zip Code)


       Registrant's telephone number, including area code: (713) 937-8888



<PAGE>   2



ITEM 5.          OTHER EVENTS

     Drilex  International Inc. ("Drilex") entered into an Agreement and Plan of
Merger among Baker Hughes Incorporated, Baker Hughes Merger, Inc. and Drilex
dated as of April 16, 1997 and entered into a Stockholder Agreement among Baker
Hughes Incorporated, DRLX Partners, L.P. and Drilex dated as of April 16, 1997.

ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION
                  AND EXHIBITS

         The following exhibits are filed as part of this report:

         1.  Agreement and Plan of Merger among Baker Hughes Incorporated, 
             Baker Hughes Merger, Inc. and Drilex International Inc., dated as
             of April 16, 1997.

         2.  Stockholder Agreement among Baker Hughes Incorporated, DRLX 
             Partners, L.P. and Drilex dated as of April 16, 1997.



                                        2

<PAGE>   3



                                    SIGNATURE

         Pursuant to the requirements of Section 12 of the Securities Exchange
Act of 1934, the registrant has duly caused this report to be signed on its
behalf by the undersigned hereunto duly authorized.

Dated: April 17, 1997

                                        DRILEX INTERNATIONAL INC.



                                        By: /s/ G. Bruce Broussard
                                           ---------------------------------
                                           G. Bruce Broussard,
                                           Vice President-Finance and
                                           Administration and Secretary



                                        3

<PAGE>   4


                                  EXHIBIT INDEX


 EXHIBIT
 NUMBER                             DESCRIPTION
 99.1    Agreement and Plan of Merger among Baker Hughes Incorporated,
         Baker Hughes Merger, Inc. and Drilex International Inc., dated as
         of April 16, 1997.
 99.2    Stockholder Agreement among Baker Hughes Incorporated, DRLX
         Partners, L.P. and Drilex dated as of April 16, 1997.

<PAGE>   1
                                                                    EXHIBIT 99.1
 
                                                                  Execution Copy
 
                          AGREEMENT AND PLAN OF MERGER
 
                                     AMONG
 
              BAKER HUGHES INCORPORATED, BAKER HUGHES MERGER, INC.
 
                                      AND
 
                           DRILEX INTERNATIONAL INC.
 
                           DATED AS OF APRIL 16, 1997
<PAGE>   2
 
                               TABLE OF CONTENTS
 
<TABLE>
<S>   <C>                                                           <C>
                               ARTICLE I
                              THE MERGER
1.1   The Merger; Effective Time of the Merger....................    1
1.2   Closing.....................................................    1
1.3   Effects of the Merger.......................................    1
ARTICLE II
EFFECT OF THE MERGER ON THE CAPITAL STOCK OF THE
CONSTITUENT CORPORATIONS; EXCHANGE OF CERTIFICATES
2.1   Effect on Capital Stock.....................................    2
2.2   Exchange of Certificates....................................    4
ARTICLE III
REPRESENTATIONS AND WARRANTIES
3.1   Representations and Warranties of Drilex....................    6
3.2   Representations and Warranties of Baker Hughes and Sub......   16
ARTICLE IV
COVENANTS RELATING TO CONDUCT OF BUSINESS OF DRILEX
4.1   Conduct of Business by Drilex Pending the Merger............   29
4.2   No Solicitation.............................................   31
4.3   Conduct of Business by Baker Hughes Pending the Merger......   32
ARTICLE V
ADDITIONAL AGREEMENTS
5.1   Preparation of S-4 and the Proxy Statement..................   33
5.2   Letter of Drilex's Accountants..............................   33
5.3   Letter of Baker Hughes's Accountants........................   34
5.4   Access to Information.......................................   34
5.5   Drilex Stockholders Meeting.................................   34
5.6   Filings; Other Action.......................................   34
5.7   Agreements of Others........................................   35
5.8   Authorization for Shares and Stock Exchange Listing.........   35
5.9   Employee Matters............................................   35
5.10  Stock Options...............................................   36
5.11  Indemnification; Directors' and Officers' Insurance.........   37
5.12  Drilex Credit Agreement.....................................   38
5.13  Agreement to Defend.........................................   38
5.14  Public Announcements........................................   38
5.15  Other Actions...............................................   38
5.16  Advice of Changes; SEC Filings..............................   39
5.17  Reorganization..............................................   39
5.18  Accounting Matters..........................................   39
ARTICLE VI
CONDITIONS PRECEDENT
6.1   Conditions to Each Party's Obligation to Effect the
      Merger......................................................   39
6.2   Conditions of Obligations of Baker Hughes and Sub...........   40
6.3   Conditions of Obligations of Drilex.........................   42
</TABLE>
 
                                        i
<PAGE>   3
ARTICLE VII
TERMINATION AND AMENDMENT
7.1   Termination.................................................   42
7.2   Effect of Termination.......................................   44
7.3   Amendment...................................................   45
7.4   Extension; Waiver...........................................   45
ARTICLE VIII
GENERAL PROVISIONS
8.1   Payment of Expenses.........................................   46
8.2   Nonsurvival of Representations, Warranties and Agreements...   46
8.3   Notices.....................................................   46
8.4   Interpretation..............................................   47
8.5   Counterparts................................................   47
8.6   Entire Agreement; No Third Party Beneficiaries..............   47
8.7   Governing Law...............................................   47
8.8   No Remedy in Certain Circumstances..........................   48
8.9   Assignment..................................................   48
8.10  Schedules...................................................   48
 
                                       ii
<PAGE>   4
 
                           GLOSSARY OF DEFINED TERMS
 
<TABLE>
<S>                                                           <C>
Acquisition Proposal........................................  4.2(e)
Affiliates..................................................  5.7
Agreement...................................................  Preamble
Antitrust Laws..............................................  7.2(c)
Average Closing Price.......................................  2.1(d)
Baker Hughes................................................  Preamble
Baker Hughes Common Stock...................................  2.1(c)
Baker Hughes Employee Benefit Plans.........................  3.2(l)(iii)
Baker Hughes Equity Plans...................................  3.2(b)
Baker Hughes ERISA Affiliate................................  3.2(l)(i)
Baker Hughes Intangible Property............................  3.2(n)
Baker Hughes Litigation.....................................  3.2(j)
Baker Hughes Order..........................................  3.2(j)
Baker Hughes Pension Plans..................................  3.2(l)(i)
Baker Hughes Permits........................................  3.2(i)
Baker Hughes Preferred Stock................................  3.2(b)
Baker Hughes SEC Documents..................................  3.2(d)
Bank Credit Facility........................................  5.12
CERCLA......................................................  3.1(o)(A)
Certificate of Merger.......................................  1.1
Certificates................................................  2.2(b)
Closing.....................................................  1.1
Closing Date................................................  1.2
Code........................................................  Recitals
Confidentiality Agreement...................................  5.4
Constituent Corporations....................................  1.3(a)
DGCL........................................................  1.1
Drilex......................................................  Preamble
Drilex Common Stock.........................................  2.1
Drilex Employee Benefit Plans...............................  3.1(l)(iv)
Drilex ERISA Affiliate......................................  3.1(l)(i)
Drilex Intangible Property..................................  3.1(n)
Drilex Litigation...........................................  3.1(j)
Drilex Order................................................  3.1(j)
Drilex Pension Plans........................................  3.1(l)(i)
Drilex Permits..............................................  3.1(i)
Drilex Preferred Stock......................................  3.1(b)
Drilex Representatives......................................  4.2(a)
Drilex SEC Documents........................................  3.1(d)
Drilex Stock Option.........................................  5.10(a)
Drilex Stock Plan...........................................  3.1(b)
Drilex Value................................................  2.1(e)(vii)
Drilex Warrants.............................................  3.1(b)
EBITDA......................................................  2.1(e)(ii)
Effective Time..............................................  1.1
Environmental Law...........................................  3.1(o)(A)
ERISA.......................................................  3.1(l)(i)
Exchange Act................................................  3.1(c)(iii)
Exchange Agent..............................................  2.2(a)
Exchange Fund...............................................  2.2(a)
Exchange Ratio..............................................  2.1(c)
</TABLE>
 
                                       iii
<PAGE>   5
GAAP........................................................  3.1(d)
Governmental Entity.........................................  3.1(c)(iii)
Hazardous Materials.........................................  3.1(o)(B)
HSR Act.....................................................  3.1(c)(iii)
Indemnified Liabilities.....................................  5.11(a)
Indemnified Parties.........................................  5.11(a)
Injunction..................................................  6.1(e)
IRS.........................................................  3.1(k)(ii)
Material Adverse Change.....................................  3.1(a)
Material Adverse Effect.....................................  3.1(a)
Merger......................................................  Recitals
Monthly.....................................................  2.1(e)(iv)
Monthly Statements..........................................  2.1(e)(v)
NYSE........................................................  2.1(d)
OSHA........................................................  3.1(o)(A)
PBGC........................................................  3.1(l)(iii)
Pricing Period..............................................  2.1(d)
Proxy Statement.............................................  3.1(c)(iii)
Release.....................................................  3.1(o)(C)
Remedial Action.............................................  3.1(o)(D)
Returns.....................................................  3.1(k)(i)
Revenue.....................................................  2.1(e)(i)
S-4.........................................................  3.1(e)
SEC.........................................................  3.1(a)
Securities Act..............................................  3.1(d)
Significant Subsidiary......................................  3.1(a)
Stockholder Agreement.......................................  Recitals
Surviving Corporation.......................................  1.3(a)
Sub.........................................................  Preamble
Subsidiary..................................................  2.1(b)
Taxes.......................................................  3.1(k)
Test Period.................................................  2.1(e)(iii)
Unexercisable Option........................................  5.10(c)
Voting Debt.................................................  3.1(b)
 
                                       iv
<PAGE>   6
 
                 SCHEDULES TO THE AGREEMENT AND PLAN OF MERGER
 
<TABLE>
<CAPTION>
       SCHEDULE NO.                                 DESCRIPTION
       ------------                                 -----------
<S>                         <C>
3.1(a)                      -- Significant Subsidiaries; Jurisdiction of Incorporation
3.1(b)                      -- Capital Structure
3.1(c)                      -- Authority; No Violations; Consents and Approvals
3.1(d)                      -- SEC Documents
3.1(f)                      -- Absence of Certain Changes or Events
3.1(g)                      -- No Undisclosed Material Liabilities
3.1(h)                      -- No Default
3.1(i)                      -- Compliance with Applicable Laws
3.1(j)                      -- Litigation
3.1(k)(i),(ii),(iii),(vi)   -- Taxes
3.1(l)(ii),(v)              -- Pension and Benefit Plans; ERISA
3.1(m)(i),(ii)              -- Labor Matters
3.1(n)                      -- Intangible Property
3.1(o)                      -- Environmental Matters
3.1(t)                      -- Brokers
3.1(u)                      -- Tax Matters
4.1(a)                      -- Ordinary Course
4.1(b)                      -- Dividends; Changes in Stock
4.1(c)                      -- Issuance of Securities
4.1(e)                      -- No Acquisitions
4.1(f)                      -- No Dispositions
4.1(h)                      -- Certain Employee Matters
4.1(i)                      -- Indebtedness; Leases; Capital Expenditures
5.9                         -- Employee Matters
3.2(b)                      -- Capital Structure
3.2(f)                      -- Absence of Certain Changes or Events
3.2(g)                      -- No Undisclosed Material Liabilities
3.2(h)                      -- No Default
3.2(i)                      -- Compliance with Applicable Laws
3.2(j)                      -- Litigation
3.2(k)(i),(ii),(iii)        -- Taxes
3.2(m)                      -- Labor Matters
3.2(n)                      -- Intangible Property
3.2(o)                      -- Environmental Matters
3.2(u)                      -- Tax Matters
</TABLE>
 
                                        v
<PAGE>   7
 
                          AGREEMENT AND PLAN OF MERGER
 
     AGREEMENT AND PLAN OF MERGER, dated as of April 16, 1997 (this
"Agreement"), among Baker Hughes Incorporated, a Delaware corporation ("Baker
Hughes"), Baker Hughes Merger, Inc., a Delaware corporation and a direct wholly
owned subsidiary of Baker Hughes ("Sub"), and Drilex International Inc., a
Delaware corporation ("Drilex").
 
     WHEREAS, the Boards of Directors of Baker Hughes, Sub and Drilex each have
determined that it is in the best interests of their respective stockholders for
Sub to merge with and into Drilex (the "Merger") upon the terms and subject to
the conditions of this Agreement;
 
     WHEREAS, concurrently with the execution and delivery hereof, DRLX
Partners, L.P., the owner of approximately 61.8% of the outstanding Drilex
Common Stock (as hereinafter defined), is entering into a Stockholder Agreement
(the "Stockholder Agreement") with Baker Hughes providing for, among other
things, the voting of the shares of Drilex Common Stock owned by DRLX Partners,
L.P. and the grant to Baker Hughes of an option to purchase a portion of such
shares of Drilex Common Stock;
 
     WHEREAS, for federal income tax purposes, it is intended that the Merger
shall qualify as a reorganization within the meaning of Section 368(a) of the
Internal Revenue Code of 1986, as amended (the "Code");
 
     WHEREAS, for accounting purposes, it is intended that the Merger shall be
accounted for as a pooling of interests; and
 
     WHEREAS, Baker Hughes, Sub and Drilex desire to make certain
representations, warranties, covenants and agreements in connection with the
Merger and also to prescribe various conditions to the Merger;
 
     NOW, THEREFORE, in consideration of the foregoing and the representations,
warranties, covenants and agreements herein contained, the parties agree as
follows:
 
                                   ARTICLE I
 
                                   THE MERGER
 
     1.1  The Merger; Effective Time of the Merger. Upon the terms and subject
to the conditions of this Agreement and in accordance with the Delaware General
Corporation Law (the "DGCL"), Sub shall be merged with and into Drilex at the
Effective Time (as hereinafter defined). The Merger shall become effective
immediately when a certificate of merger (the "Certificate of Merger"), prepared
and executed in accordance with the relevant provisions of the DGCL, is filed
with the Secretary of State of the State of Delaware or, if agreed to by the
parties, at such time thereafter as is provided in the Certificate of Merger
(the "Effective Time"). The filing of the Certificate of Merger shall be made as
soon as practicable on or after the closing of the Merger (the "Closing").
 
     1.2  Closing. The Closing shall take place at 10:00 a.m. on a date to be
specified by the parties, which shall be no later than the second business day
after satisfaction (or waiver in accordance with this Agreement) of the latest
to occur of the conditions set forth in Article VI (the "Closing Date"), at the
offices of Baker & Botts, L.L.P., One Shell Plaza, 910 Louisiana, Houston, Texas
77002, provided that the Closing Date shall be delayed if the Drilex Value has
not been determined until the business day after the Drilex Value has been
determined, unless another date or place is agreed to in writing by the parties.
 
     1.3  Effects of the Merger. (a) At the Effective Time: (i) Sub shall be
merged with and into Drilex, the separate existence of Sub shall cease and
Drilex shall continue as the surviving corporation (Sub and Drilex are sometimes
referred to herein as the "Constituent Corporations" and Drilex is sometimes
referred to herein as the "Surviving Corporation"); (ii) the Restated
Certificate of Incorporation of Drilex as in effect immediately prior to the
Effective Time shall be the Certificate of Incorporation of the Surviving
Corporation; and (iii) the Bylaws of Drilex as in effect immediately prior to
the Effective Time shall be the Bylaws of the Surviving Corporation.
 
                                        1
<PAGE>   8
 
     (b) The directors of Sub at the Effective Time shall, from and after the
Effective Time, be the initial directors of the Surviving Corporation, and the
officers of Drilex at the Effective Time shall, from and after the Effective
Time, be the initial officers of the Surviving Corporation, and such directors
and officers shall serve until their successors have been duly elected or
appointed and qualified or until their earlier death, resignation or removal in
accordance with the Surviving Corporation's Restated Certificate of
Incorporation and Bylaws.
 
     (c) At and after the Effective Time, the Surviving Corporation shall
possess all the rights, privileges, powers and franchises of a public as well as
of a private nature, and be subject to all the restrictions, disabilities and
duties of each of the Constituent Corporations; and all and singular rights,
privileges, powers and franchises of each of the Constituent Corporations, and
all property, real, personal and mixed, and all debts due to either of the
Constituent Corporations on whatever account, as well as for stock subscriptions
and all other things in action or belonging to each of the Constituent
Corporations, shall be vested in the Surviving Corporation; and all property,
rights, privileges, powers and franchises, and all and every other interest
shall be thereafter as effectually the property of the Surviving Corporation as
they were of the Constituent Corporations; and the title to any real estate
vested by deed or otherwise, in either of the Constituent Corporations, shall
not revert or be in any way impaired; but all rights of creditors and all liens
upon any property of either of the Constituent Corporations shall be preserved
unimpaired; and all debts, liabilities and duties of the Constituent
Corporations shall thenceforth attach to the Surviving Corporation, and may be
enforced against it to the same extent as if said debts and liabilities had been
incurred by it.
 
                                   ARTICLE II
 
                EFFECT OF THE MERGER ON THE CAPITAL STOCK OF THE
               CONSTITUENT CORPORATIONS; EXCHANGE OF CERTIFICATES
 
     2.1  Effect on Capital Stock. At the Effective Time, by virtue of the
Merger and without any action on the part of the holder of any shares of common
stock, par value $0.01 per share, of Drilex ("Drilex Common Stock") or capital
stock of Sub:
 
          (a) Capital Stock of Sub. Each issued and outstanding share of the
     common stock of Sub shall be converted into and become 10,000 fully paid
     and nonassessable shares of common stock, par value $0.01 per share, of the
     Surviving Corporation.
 
          (b) Cancellation of Treasury Stock and Baker Hughes-Owned Stock. Each
     share of Drilex Common Stock and all other shares of capital stock of
     Drilex that are owned by Drilex as treasury stock and any shares of Drilex
     Common Stock and all other shares of capital stock of Drilex owned by Baker
     Hughes, Sub or any other wholly owned Subsidiary (as hereinafter defined)
     of Baker Hughes or Drilex shall be canceled and retired and shall cease to
     exist and no stock of Baker Hughes or other consideration shall be
     delivered or deliverable in exchange therefor. As used in this Agreement,
     the word "Subsidiary" means, with respect to any party, any corporation or
     other organization, whether incorporated or unincorporated, of which: (i)
     such party or any other Subsidiary of such party is a general partner
     (excluding partnerships, the general partnership interests of which are
     held by such party or any Subsidiary of such party that do not have a
     majority of the voting interest in such partnership); or (ii) at least a
     majority of the securities or other interests having by their terms
     ordinary voting power to elect a majority of the Board of Directors or
     others performing similar functions with respect to such corporation or
     other organization is, directly or indirectly, owned or controlled by such
     party or by any one or more of its Subsidiaries, or by such party and any
     one or more of its Subsidiaries.
 
          (c) Exchange Ratio for Drilex Common Stock. Subject to the provisions
     of Section 2.2(e) hereof, each share of Drilex Common Stock issued and
     outstanding immediately prior to the Effective Time (other than shares to
     be canceled in accordance with Section 2.1(b)) shall be converted into a
     fraction of a duly authorized, validly issued, fully paid and nonassessable
     share of common stock, par value $1.00 per share, of Baker Hughes ("Baker
     Hughes Common Stock"), calculated by dividing (i) the Drilex Value by (ii)
     the Average Closing Price, rounded to four decimal places (such fraction
     being referred to herein as the "Exchange Ratio"). All such shares of
     Drilex Common Stock, when so converted, shall no longer
 
                                        2
<PAGE>   9
 
     be outstanding and shall automatically be canceled and retired and shall
     cease to exist, and each holder of a certificate representing any such
     shares shall cease to have any rights with respect thereto, except the
     right to receive the shares of Baker Hughes Common Stock and cash in lieu
     of fractional shares of Baker Hughes Common Stock as contemplated by
     Section 2.2(e), to be issued or paid in consideration therefor upon the
     surrender of such certificate in accordance with Section 2.2, without
     interest.
 
          (d) Average Closing Price. "Average Closing Price" shall mean the
     average of the per share closing prices of Baker Hughes Common Stock as
     reported on the consolidated transaction reporting system for securities
     traded on the New York Stock Exchange, Inc. ("NYSE") for the ten
     consecutive trading days ending immediately prior to the second trading day
     prior to the Closing Date (the "Pricing Period"), appropriately adjusted
     for any stock splits, reverse stock splits, stock dividends,
     recapitalizations or similar transactions; provided, however, that if any
     ex-dividend trading with respect to any regular quarterly cash dividend on
     Baker Hughes Common Stock occurs on or after the first day of the Pricing
     Period and prior to the Closing Date, then for purposes of calculating the
     Average Closing Price (x) if the related record date occurs prior to the
     Effective Time, the closing price of Baker Hughes Common Stock for each day
     prior to the related ex-dividend date included in the Pricing Period shall
     be reduced by the amount per share of such dividend and (y) if the related
     record date occurs at or after the Effective Time, the closing price of
     Baker Hughes Common Stock for each day on or after such ex-dividend date
     included in the Pricing Period shall be increased by the amount per share
     of such dividend.
 
          (e) Drilex Value. For purposes of this Agreement:
 
             (i) "Revenue" with respect to a period means the net revenues of
        Drilex for such period, determined on a consolidated basis in accordance
        with GAAP (as defined herein) applied on a basis consistent with that
        used in preparing the financial statements of Drilex referred to in
        Section 3.1(d), as finally determined pursuant to the procedures set
        forth in this Section 2.1.
 
             (ii) "EBITDA" with respect to a period means the net income plus
        interest expense, provision for income taxes, and depreciation and
        amortization of Drilex for such period, determined on a consolidated
        basis in accordance with GAAP applied on a basis consistent with that
        used in preparing the financial statements of Drilex referred to in
        Section 3.1(d), as finally determined pursuant to the procedures set
        forth in this Section 2.1.
 
             (iii) "Test Period" means the period from April 1, 1997 to (i)
        April 30, 1997, if the Closing occurs prior to June 15, 1997 (or if the
        Closing would have occurred prior to such date except for delay caused
        by the procedures of Section 2.1(e)(vi)), (ii) May 31, 1997, if the
        Closing occurs prior to July 15, 1997 (or if the Closing would have
        occurred prior to such date except for delay caused by the procedures of
        Section 2.1(e)(vi)) and (iii) June 30, 1997, otherwise.
 
             (iv) "Monthly," when used with respect to Revenue or EBITDA, means
        the total amount of Revenue or EBITDA, as the case may be, for the Test
        Period divided by the number of months in the Test Period.
 
             (v) As soon as available after the end of each of April, May and
        June 1997 but in any event by the 20th day of the next month, Drilex
        shall prepare, with the input and participation of Baker Hughes, and
        shall furnish to Baker Hughes financial statements (a balance sheet and
        income statement) of Drilex for such month and for the period from April
        1, 1997 to the end of such month, prepared on a consolidated basis in
        accordance with GAAP applied on a basis consistent with that used in
        preparing the financial statements of Drilex referred to in Section
        3.1(d) (the "Monthly Statements"). Drilex shall provide Baker Hughes
        with access to preliminary copies and drafts of the Monthly Statements.
        Such Monthly Statements shall include a calculation of Revenue and
        EBITDA (calculated separately for purposes of Section 2.1(e)(vii) and
        Section 7.1(c)(v)) for such month and for the Test Period, and shall be
        certified by the Chief Financial Officer and the Chief Executive Officer
        of Drilex as having been prepared in accordance with the requirements of
        this Agreement.
 
                                        3
<PAGE>   10
 
             (vi) Drilex shall provide Baker Hughes with access to copies of all
        work papers and other relevant documents to permit Baker Hughes to
        verify the accuracy of the Monthly Statements. Baker Hughes shall have a
        period of ten calendar days after delivery of the Monthly Statements for
        April 1997, May 1997 and June 1997 to review them and make any
        objections it may have in writing to Drilex. If written objections to
        such Monthly Statements are delivered to Drilex by Baker Hughes within
        such period, then Drilex and Baker Hughes shall attempt to resolve the
        matter or matters in dispute. If no written objections are made by
        Drilex within such period, then such Monthly Statements shall be final
        and binding on the parties hereto. If disputes with respect to such
        Monthly Statements cannot be resolved by Drilex and Baker Hughes within
        five business days after the delivery of the objections to such Monthly
        Statements, then the specific matters in dispute shall be submitted to
        Deloitte & Touche LLP or such other independent accounting firm as may
        be approved by Drilex and Baker Hughes, which firm shall decide such
        matters. Such independent accounting firm will send to Drilex and Baker
        Hughes its determination on the specified matters in dispute within five
        business days of such submission, which determination shall be final and
        binding on the parties hereto. The fees and expenses of such independent
        accounting firm shall be borne by one-half by Drilex and one-half by
        Baker Hughes.
 
             (vii) The "Drilex Value" shall be $15.00, unless Monthly Revenue
        exceeds $6,000,000 and Monthly EBITDA exceeds $1,000,000, each as
        finally determined in accordance with this Section 2.1, in which case
        the Drilex Value shall be $16.00 (subject to the provisions of Sections
        6.2(e) and 7.1(c)(vi)).
 
             (viii) For purposes of determining Revenue and EBITDA for any
        period, (1) amounts attributable to OEM sales (accounted consistently
        with Drilex's past practice) (but not ordinary sales under existing
        contracts) destined to ultimate purchasers outside the United States,
        the United Kingdom, Canada, Argentina and Venezuela shall be excluded
        (x) with respect to the calculations for purposes of Section
        2.1(e)(vii), to the extent of transactions generating revenues in excess
        of $500,000 in the aggregate during such period, and (y) with respect to
        the calculations for purposes of Section 7.1(c)(v), to the extent of any
        single transaction (or group of related transactions) generating
        revenues in excess of $300,000 per transaction (or group of related
        transactions); (2) the effects of any investment banking, legal and
        other advisory fees and expenses, employment costs arising from the
        agreements referred to in Schedule 5.9 or other expenses primarily
        attributable to, or resulting from, this Agreement and the transactions
        contemplated hereby shall be excluded; and (3) the effects of any
        adjustment or change in accruals or reserves except to the extent made
        pursuant to GAAP consistent with past practices resulting from events
        occurring after March 31, 1997 shall be excluded.
 
          (f) Treatment of Stock Options. Each outstanding Drilex Stock Option
     (as defined in Section 5.10) shall be treated as provided in Section 5.10.
 
          (g) Drilex Warrants. Baker Hughes shall agree to be bound by the
     conversion provisions of the Drilex Warrants (as defined in Section
     3.1(b)), such that the Drilex Warrants shall be exercisable for Baker
     Hughes Common Stock based on the Exchange Ratio in accordance with the
     terms of Drilex Warrants.
 
     2.2 Exchange of Certificates.
 
          (a) Exchange Agent. As of the Effective Time, Baker Hughes shall
     deposit, or cause to be deposited, with Baker Hughes's transfer agent for
     Baker Hughes Common Stock or such other bank or trust company designated by
     Baker Hughes and reasonably acceptable to Drilex (the "Exchange Agent"),
     for the benefit of the holders of shares of Drilex Common Stock, for
     exchange in accordance with this Article II, through the Exchange Agent,
     certificates representing the shares of Baker Hughes Common Stock (such
     shares of Baker Hughes Common Stock, together with any dividends or
     distributions with respect thereto, being hereinafter referred to as the
     "Exchange Fund") issuable pursuant to Section 2.1 in exchange for
     outstanding shares of Drilex Common Stock, together with cash in lieu of
     fractional shares as provided herein. The Exchange Agent shall, pursuant to
     irrevocable
 
                                        4
<PAGE>   11
 
     instructions, deliver the Baker Hughes Common Stock contemplated to be
     issued pursuant to Section 2.1 out of the Exchange Fund. The Exchange Fund
     shall not be used for any other purpose.
 
          (b) Exchange Procedures. As soon as reasonably practicable after the
     Effective Time, the Exchange Agent shall mail to each holder of record of a
     certificate or certificates which, immediately prior to the Effective Time,
     represented outstanding shares of Drilex Common Stock (the "Certificates"),
     which holder's shares of Drilex Common Stock were converted into the right
     to receive shares of Baker Hughes Common Stock pursuant to Section 2.1: (i)
     a letter of transmittal (which shall specify that delivery shall be
     effected and risk of loss and title to the Certificates shall pass only
     upon delivery of the Certificates to the Exchange Agent, and shall be in
     such form and have such other provisions as Baker Hughes may reasonably
     specify); and (ii) instructions for use in effecting the surrender of the
     Certificates in exchange for certificates representing shares of Baker
     Hughes Common Stock. Upon surrender of a Certificate for cancellation to
     the Exchange Agent or to such other agent or agents as may be appointed by
     Baker Hughes, together with such letter of transmittal, duly executed, and
     any other required documents, the holder of such Certificate shall be
     entitled to receive in exchange therefor a certificate representing that
     number of whole shares of Baker Hughes Common Stock which such holder has
     the right to receive pursuant to the provisions of this Article II and cash
     in lieu of fractional shares of Baker Hughes Common Stock as contemplated
     by Section 2.2(e), and the Certificate so surrendered shall forthwith be
     canceled. In the event of a transfer of ownership of Drilex Common Stock
     which is not registered in the transfer records of Drilex, a certificate
     representing the appropriate number of shares of Baker Hughes Common Stock
     may be issued to a transferee if the Certificate representing such Drilex
     Common Stock is presented to the Exchange Agent accompanied by all
     documents required to evidence and effect such transfer and by evidence
     that any applicable stock transfer taxes have been paid. Until surrendered
     as contemplated by this Section 2.2, each Certificate shall be deemed at
     any time after the Effective Time to represent only the right to receive
     upon such surrender the certificate representing shares of Baker Hughes
     Common Stock and cash in lieu of any fractional shares of Baker Hughes
     Common Stock as contemplated by this Section 2.2. The Exchange Agent shall
     not be entitled to vote or exercise any rights of ownership with respect to
     the Baker Hughes Common Stock held by it from time to time hereunder,
     except that it shall receive and hold all dividends or other distributions
     paid or distributed with respect thereto for the account of persons
     entitled thereto.
 
          (c) Distributions with Respect to Unexchanged Shares. No dividends or
     other distributions with respect to Baker Hughes Common Stock declared or
     made after the Effective Time with a record date after the Effective Time
     shall be paid to the holder of any unsurrendered Certificate with respect
     to the right to receive shares of Baker Hughes Common Stock represented
     thereby and no cash payment in lieu of fractional shares shall be paid to
     any such holder pursuant to Section 2.2(e) until the holder of such
     Certificate shall surrender such Certificate. Subject to the effect of
     applicable laws, following surrender of any such Certificate, there shall
     be paid to the holder thereof, without interest: (i) at the time of such
     surrender, the amount of any cash payable in lieu of a fractional share of
     Baker Hughes Common Stock to which such holder is entitled pursuant to
     Section 2.2(e) and the amount of dividends or other distributions with a
     record date after the Effective Time theretofore paid with respect to such
     whole shares of Baker Hughes Common Stock; and (ii) at the appropriate
     payment date, the amount of dividends or other distributions with a record
     date after the Effective Time but prior to surrender and a payment date
     subsequent to surrender payable with respect to such whole shares of Baker
     Hughes Common Stock.
 
          (d) No Further Ownership Rights in Drilex Common Stock. All shares of
     Baker Hughes Common Stock issued upon the surrender for exchange of shares
     of Drilex Common Stock in accordance with the terms hereof (including any
     cash paid pursuant to Section 2.2(c) or 2.2(e)) shall be deemed to have
     been issued in full satisfaction of all rights pertaining to such shares of
     Drilex Common Stock, subject, however, to the Surviving Corporation's
     obligation to pay any dividends or make any other distributions with a
     record date prior to the Effective Time that may have been declared or made
     by Drilex on such shares of Drilex Common Stock in accordance with the
     terms of this Agreement or prior to the date hereof and which remain unpaid
     at the Effective Time, and after the Effective Time there shall be no
 
                                        5
<PAGE>   12
 
     further registration of transfers on the stock transfer books of the
     Surviving Corporation of the shares of Drilex Common Stock that were
     outstanding immediately prior to the Effective Time. If, after the
     Effective Time, Certificates are presented to the Surviving Corporation for
     any reason, they shall be canceled and exchanged as provided in this
     Article II.
 
          (e) No Fractional Shares. No certificates or scrip representing
     fractional shares of Baker Hughes Common Stock shall be issued upon the
     surrender for exchange of Certificates pursuant to this Article II, and,
     except as provided in this Section 2.2(e), no dividend or other
     distribution, stock split or interest shall relate to any such fractional
     security, and such fractional interests shall not entitle the owner thereof
     to vote or to any rights of a security holder of Baker Hughes. In lieu of
     any fractional security, each holder of shares of Drilex Common Stock who
     would otherwise have been entitled to a fraction of a share of Baker Hughes
     Common Stock upon surrender of Certificates for exchange pursuant to this
     Article II will be paid an amount in cash (without interest) equal to the
     Average Closing Price multiplied by the fractional interest the holder
     would otherwise be entitled to receive.
 
          (f) Termination of Exchange Fund. Any portion of the Exchange Fund and
     any cash in lieu of fractional shares of Baker Hughes Common Stock made
     available to the Exchange Agent that remain undistributed to the former
     stockholders of Drilex for one year after the Effective Time shall be
     delivered to Baker Hughes, upon demand, and any stockholders of Drilex who
     have not theretofore complied with this Article II shall thereafter look
     only to Baker Hughes for payment of their claim for Baker Hughes Common
     Stock, any cash in lieu of fractional shares of Baker Hughes Common Stock
     and any dividends or distributions with respect to Baker Hughes Common
     Stock.
 
          (g) No Liability. Neither Baker Hughes nor Drilex shall be liable to
     any holder of shares of Drilex Common Stock or Baker Hughes Common Stock,
     as the case may be, for such shares (or dividends or distributions with
     respect thereto) or cash in lieu of fractional shares of Baker Hughes
     Common Stock delivered to a public official pursuant to any applicable
     abandoned property, escheat or similar law.
 
                                  ARTICLE III
 
                         REPRESENTATIONS AND WARRANTIES
 
     3.1 Representations and Warranties of Drilex. Drilex represents and
warrants to Baker Hughes and Sub as follows:
 
          (a) Organization, Standing and Power. Each of Drilex and its
     Subsidiaries is a corporation, limited liability company or partnership
     duly organized, validly existing and in good standing under the laws of its
     state or jurisdiction of incorporation or organization, has all requisite
     power and authority to own, lease and operate its properties and to carry
     on its business as now being conducted, and is duly qualified and in good
     standing to do business in each jurisdiction in which the business it is
     conducting, or the operation, ownership or leasing of its properties, makes
     such qualification necessary, other than in such jurisdictions where the
     failure so to qualify would not have a Material Adverse Effect (as defined
     below) on Drilex. Drilex has heretofore delivered to Baker Hughes complete
     and correct copies of its Restated Certificate of Incorporation and Bylaws.
     All Significant Subsidiaries of Drilex and their respective jurisdictions
     of incorporation or organization are identified on Schedule 3.1(a). As used
     in this Agreement: (i) a "Significant Subsidiary" means any Subsidiary of
     Drilex or Baker Hughes, as the case may be, that would constitute a
     Significant Subsidiary of such party within the meaning of Rule 1-02 of
     Regulation S-X of the Securities and Exchange Commission (the "SEC"); and
     (ii) a "Material Adverse Effect" or "Material Adverse Change" shall mean,
     in respect of Drilex or Baker Hughes, as the case may be, any effect or
     change that is or, as far as can be reasonably determined, is reasonably
     likely to be, materially adverse to the business, operations, assets,
     condition (financial or otherwise) or results of operation of such party
     and its Subsidiaries taken as a whole.
 
          (b) Capital Structure. As of the date hereof, the authorized capital
     stock of Drilex consists of 25,000,000 shares of Drilex Common Stock and
     10,000,000 shares of preferred stock, par value $0.01 per share ("Drilex
     Preferred Stock"). At the close of business on April 1, 1997: (i) 6,663,356
     shares of
 
                                        6
<PAGE>   13
 
     Drilex Common Stock and no shares of Drilex Preferred Stock were issued and
     outstanding, 184,187 shares of Drilex Common Stock were reserved for
     issuance pursuant to outstanding options under Drilex's Stock Option Plan
     (the "Drilex Stock Plan") and 180,981 shares of Drilex Common Stock were
     reserved for issuance pursuant to outstanding warrants to purchase Drilex
     Common Stock at an exercise price of $5.53 per share, subject to adjustment
     (the "Drilex Warrants"), (ii) 96,523 shares of Drilex Common Stock were
     held by Drilex in its treasury; and (iii) no bonds, debentures, notes or
     other indebtedness having the right to vote (or convertible into securities
     having the right to vote) on any matters on which Drilex stockholders may
     vote ("Voting Debt") were issued or outstanding. Except as set forth on
     Schedule 3.1(b), all outstanding shares of Drilex Common Stock are validly
     issued, fully paid and nonassessable and are not subject to preemptive
     rights. Except as set forth on Schedule 3.1(b), all outstanding shares of
     capital stock of the Subsidiaries of Drilex are owned by Drilex, or a
     direct or indirect wholly owned Subsidiary of Drilex, free and clear of all
     liens, charges, encumbrances, claims and options of any nature. Except as
     set forth in this Section 3.1(b) or on Schedule 3.1(b) and except for
     changes since April 1, 1997 resulting from the exercise of employee stock
     options granted pursuant to, or from issuances or purchases under, the
     Drilex Stock Plan, the exercise of the Drilex Warrants or as contemplated
     by this Agreement, there are outstanding: (i) no shares of capital stock,
     Voting Debt or other voting securities of Drilex; (ii) no securities of
     Drilex or any Subsidiary of Drilex convertible into or exchangeable for
     shares of capital stock, Voting Debt or other voting securities of Drilex
     or any Subsidiary of Drilex; and (iii) no options, warrants, calls, rights
     (including preemptive rights), commitments or agreements to which Drilex or
     any Subsidiary of Drilex is a party or by which it is bound in any case
     obligating Drilex or any Subsidiary of Drilex to issue, deliver, sell,
     purchase, redeem or acquire, or cause to be issued, delivered, sold,
     purchased, redeemed or acquired, additional shares of capital stock or any
     Voting Debt or other voting securities of Drilex or of any Subsidiary of
     Drilex, or obligating Drilex or any Subsidiary of Drilex to grant, extend
     or enter into any such option, warrant, call, right, commitment or
     agreement. Except as set forth on Schedule 3.1(b), there are not as of the
     date hereof and there will not be at the Effective Time any stockholder
     agreements, voting trusts or other agreements or understandings to which
     Drilex is a party or by which it is bound relating to the voting of any
     shares of the capital stock of Drilex that will limit in any way the
     solicitation of proxies by or on behalf of Drilex from, or the casting of
     votes by, the stockholders of Drilex with respect to the Merger. Except as
     set forth on Schedule 3.1(b), there are no restrictions on Drilex to vote
     the stock of any of its Subsidiaries.
 
          (c) Authority; No Violations; Consents and Approvals.
 
             (i) The Board of Directors of Drilex has, by vote of the directors
        with no negative vote, (i) approved the Merger and the Merger Agreement
        and declared the Merger and the Merger Agreement to be in the best
        interests of the stockholders of Drilex and (ii) approved for all
        purposes (including, without limitation, purposes of Section 203 of the
        DGCL) the transactions contemplated by the Stockholder Agreement
        (including, without limitation, the grant and exercise of the option
        contained therein). The directors have advised Drilex and Baker Hughes
        that they currently intend to vote or cause to be voted all of the
        shares beneficially owned by them and their affiliates in favor of
        approval of the Merger and the Merger Agreement. Drilex has all
        requisite corporate power and authority to enter into this Agreement
        and, subject, with respect to consummation of the Merger, to approval of
        this Agreement and the Merger by the stockholders of Drilex in
        accordance with the DGCL, to consummate the transactions contemplated
        hereby. The execution and delivery of this Agreement and the
        consummation of the transactions contemplated hereby have been duly
        authorized by all necessary corporate action on the part of Drilex,
        subject, with respect to consummation of the Merger, to approval of this
        Agreement and the Merger by the stockholders of Drilex in accordance
        with the DGCL. This Agreement has been duly executed and delivered by
        Drilex and, subject, with respect to consummation of the Merger, to
        approval of this Agreement and the Merger by the stockholders of Drilex
        in accordance with the DGCL, and assuming this Agreement constitutes the
        valid and binding obligation of Baker Hughes and Sub, constitutes a
        valid and binding obligation of Drilex enforceable in accordance with
        its terms, subject, as to enforceabil-
 
                                        7
<PAGE>   14
 
        ity, to bankruptcy, insolvency, reorganization and other laws of general
        applicability relating to or affecting creditors' rights and to general
        principles of equity.
 
             (ii) Except as set forth on Schedule 3.1(c), the execution and
        delivery of this Agreement does not, and the consummation of the
        transactions contemplated hereby and compliance with the provisions
        hereof will not, conflict with, or result in any violation of, or
        default (with or without notice or lapse of time, or both) under, or
        give rise to a right of termination, cancellation or acceleration of any
        obligation or to the loss of a material benefit under, or give rise to a
        right of purchase under, result in the creation of any lien, security
        interest, charge or encumbrance upon any of the properties or assets of
        Drilex or any of its Subsidiaries under, or otherwise result in a
        detriment to Drilex or any of its Subsidiaries under, any provision of
        (i) the Restated Certificate of Incorporation or Bylaws of Drilex or any
        provision of the comparable charter or organizational documents of any
        of its Subsidiaries, (ii) any loan or credit agreement, note, bond,
        mortgage, indenture, lease or other agreement, instrument, permit,
        concession, franchise or license applicable to Drilex or any of its
        Subsidiaries, (iii) any joint venture or other ownership arrangement or
        (iv) assuming the consents, approvals, authorizations or permits and
        filings or notifications referred to in Section 3.1(c)(iii) are duly and
        timely obtained or made and the approval of the Merger and this
        Agreement by the stockholders of Drilex has been obtained, any judgment,
        order, decree, statute, law, ordinance, rule or regulation applicable to
        Drilex or any of its Subsidiaries or any of their respective properties
        or assets, other than, in the case of clause (ii), (iii) or (iv), any
        such conflicts, violations, defaults, rights, liens, security interests,
        charges, encumbrances or detriments that, individually or in the
        aggregate, would not have a Material Adverse Effect on Drilex,
        materially impair the ability of Drilex to perform its obligations
        hereunder or prevent the consummation of any of the transactions
        contemplated hereby.
 
             (iii) No consent, approval, order or authorization of, or
        registration, declaration or filing with, or permit from any court,
        governmental, regulatory or administrative agency or commission or other
        governmental authority or instrumentality, domestic or foreign (a
        "Governmental Entity"), is required by or with respect to Drilex or any
        of its Subsidiaries in connection with the execution and delivery of
        this Agreement by Drilex or the consummation by Drilex of the
        transactions contemplated hereby, as to which the failure to obtain or
        make would have a Material Adverse Effect, except for: (A) the filing of
        a premerger notification report by Drilex under the Hart-Scott-Rodino
        Antitrust Improvements Act of 1976, as amended (the "HSR Act"), and the
        expiration or termination of the applicable waiting period with respect
        thereto; (B) the appropriate filings or notifications as may be required
        by comparable Canadian or European laws; (C) the filing with the SEC of
        (x) a proxy statement in preliminary and definitive form relating to the
        meeting of Drilex's stockholders to be held in connection with the
        Merger (the "Proxy Statement") and (y) such reports under Section 13(a)
        of the Securities Exchange Act of 1934, as amended (the "Exchange Act"),
        and such other compliance with the Exchange Act and the rules and
        regulations thereunder, as may be required in connection with this
        Agreement and the transactions contemplated hereby; (D) the filing of
        the Certificate of Merger with the Secretary of State of the State of
        Delaware; (E) such filings and approvals as may be required by any
        applicable state securities, "blue sky" or takeover laws, or
        environmental laws; and (F) such filings and approvals as may be
        required by any foreign premerger notification, securities, corporate or
        other law, rule or regulation.
 
          (d) SEC Documents. Drilex has made available to Baker Hughes a true
     and complete copy of each report, schedule, registration statement and
     definitive proxy statement filed by Drilex with the SEC since May 9, 1996
     and prior to the date of this Agreement (the "Drilex SEC Documents") which
     are all the documents that Drilex was required to file with the SEC since
     such date. As of their respective dates, the Drilex SEC Documents complied
     in all material respects with the requirements of the Securities Act of
     1933, as amended (the "Securities Act"), or the Exchange Act, as the case
     may be, and the rules and regulations of the SEC thereunder applicable to
     such Drilex SEC Documents, and none of the Drilex SEC Documents contained
     any untrue statement of a material fact or omitted to state a material fact
     required to be stated therein or necessary to make the statements therein,
     in light of the circumstances
 
                                        8
<PAGE>   15
 
     under which they were made, not misleading. The financial statements of
     Drilex included in the Drilex SEC Documents complied as to form in all
     material respects with the published rules and regulations of the SEC with
     respect thereto, were prepared in accordance with generally accepted
     accounting principles ("GAAP") applied on a consistent basis during the
     periods involved (except as may be indicated in the notes thereto or, in
     the case of the unaudited statements, as permitted by Rule 10-01 of
     Regulation S-X of the SEC) and fairly present in accordance with applicable
     requirements of GAAP (subject, in the case of the unaudited statements, to
     normal, recurring adjustments, none of which are material) the consolidated
     financial position of Drilex and its consolidated Subsidiaries as of their
     respective dates and the consolidated results of operations and the
     consolidated cash flows of Drilex and its consolidated Subsidiaries for the
     periods presented therein. Except as disclosed in the Drilex SEC Documents
     or in Schedule 3.1(d), there are no agreements, arrangements or
     understandings between Drilex and any party who is at the date of this
     Agreement or was at any time prior to the date hereof but after December
     31, 1996 an Affiliate of Drilex that are required to be disclosed in the
     Drilex SEC Documents.
 
          (e) Information Supplied. None of the information supplied or to be
     supplied by Drilex for inclusion or incorporation by reference in the
     Registration Statement on Form S-4 to be filed with the SEC by Baker Hughes
     in connection with the issuance of shares of Baker Hughes Common Stock in
     the Merger (the "S-4") will, at the time the S-4 becomes effective under
     the Securities Act or at the Effective Time, contain any untrue statement
     of a material fact or omit to state any material fact required to be stated
     therein or necessary to make the statements therein not misleading, and
     none of the information supplied or to be supplied by Drilex and included
     or incorporated by reference in the Proxy Statement will, at the date
     mailed to stockholders of Drilex or at the time of the meeting of such
     stockholders to be held in connection with the Merger or at the Effective
     Time, 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 therein, in light of the circumstances under which they are
     made, not misleading. If at any time prior to the Effective Time any event
     with respect to Drilex or any of its Subsidiaries, or with respect to other
     information supplied by Drilex for inclusion in the Proxy Statement or S-4,
     shall occur which is required to be described in an amendment of, or a
     supplement to, the Proxy Statement or the S-4, such event shall be so
     described, and such amendment or supplement shall be promptly filed with
     the SEC and, as required by law, disseminated to the stockholders of
     Drilex. The Proxy Statement, insofar as it relates to Drilex or its
     Subsidiaries or other information supplied by Drilex for inclusion therein,
     will comply as to form in all material respects with the provisions of the
     Exchange Act and the rules and regulations thereunder.
 
          (f) Absence of Certain Changes or Events. Except as disclosed in, or
     reflected in the financial statements included in, the Drilex SEC Documents
     or on Schedule 3.1(f), or except as contemplated by this Agreement, since
     December 31, 1996, there has not been: (i) any declaration, setting aside
     or payment of any dividend or other distribution (whether in cash, stock or
     property) with respect to any of Drilex's capital stock; (ii) any amendment
     of any material term of any outstanding equity security of Drilex or any
     Subsidiary; (iii) any repurchase, redemption or other acquisition by Drilex
     or any Subsidiary of any outstanding shares of capital stock or other
     equity securities of, or other ownership interests in, Drilex or any
     Subsidiary, except as contemplated by Drilex Benefit Plans; (iv) any
     material change in any method of accounting or accounting practice or any
     tax method, practice or election by Drilex or any Subsidiary; or (v) any
     other transaction, commitment, dispute or other event or condition
     (financial or otherwise) of any character (whether or not in the ordinary
     course of business) that has had a Material Adverse Effect on Drilex,
     except for general economic changes and changes that may affect the
     industries of Drilex or any of its Subsidiaries generally.
 
          (g) No Undisclosed Material Liabilities. Except as disclosed in the
     Drilex SEC Documents or on Schedule 3.1(g), as of the date hereof, there
     are no liabilities of Drilex or any of its Subsidiaries of any kind
     whatsoever, whether accrued, contingent, absolute, determined, determinable
     or otherwise, that are reasonably likely to have a Material Adverse Effect
     on Drilex, other than: (i) liabilities adequately provided for on the
     balance sheet of Drilex dated as of December 31, 1996 (including the notes
     thereto)
 
                                        9
<PAGE>   16
 
     contained in Drilex's Annual Report on Form 10-K for the year ended
     December 31, 1996; and (ii) liabilities under this Agreement.
 
          (h) No Default. Neither Drilex nor any of its Subsidiaries is in
     default or violation (and no event has occurred which, with notice or the
     lapse of time or both, would constitute a default or violation) of any
     term, condition or provision of (i) their respective charter and by-laws,
     (ii) except as disclosed in Schedule 3.1(h), any note, bond, mortgage,
     indenture, license, agreement or other instrument or obligation to which
     Drilex or any of its Subsidiaries is now a party or by which Drilex or any
     of its Subsidiaries or any of their respective properties or assets may be
     bound or (iii) any order, writ, injunction, decree, statute, rule or
     regulation applicable to Drilex or any of its Subsidiaries, except in the
     case of (ii) and (iii) for defaults or violations which in the aggregate
     would not have a Material Adverse Effect on Drilex.
 
          (i) Compliance with Applicable Laws. Drilex and its Subsidiaries hold
     all permits, licenses, variances, exemptions, orders, franchises and
     approvals of all Governmental Entities necessary for the lawful conduct of
     their respective businesses (the "Drilex Permits"), except where the
     failure so to hold would not have a Material Adverse Effect on Drilex.
     Drilex and its Subsidiaries are in compliance with the terms of the Drilex
     Permits, except where the failure so to comply would not have a Material
     Adverse Effect on Drilex. Except as disclosed in the Drilex SEC Documents
     or as set forth on Schedule 3.1(i), 3.1(j), 3.1(k), 3.1(l), 3.1(m) or
     3.1(o), the businesses of Drilex and its Subsidiaries are not being
     conducted in violation of any law, ordinance or regulation of any
     Governmental Entity, except for possible violations which would not have a
     Material Adverse Effect on Drilex. Except as set forth on Schedule 3.1(i),
     as of the date of this Agreement, no investigation or review by any
     Governmental Entity with respect to Drilex or any of its Subsidiaries is
     pending or, to the best knowledge of Drilex as of the date hereof,
     threatened, other than those the outcome of which would not have a Material
     Adverse Effect on Drilex. Schedule 3.1(i) sets forth each such failure to
     hold or comply with the terms of Drilex Permits, each such violation of
     law, ordinance or regulation of any governmental entity and each such
     pending or threatened investigation or review by any governmental entity
     existing on the date hereof that involves amounts in excess of $100,000.
 
          (j) Litigation. Except as disclosed in the Drilex SEC Documents or on
     Schedule 3.1(j) hereto, there is no suit, action or proceeding pending, or,
     to the best knowledge of Drilex, threatened against or affecting Drilex or
     any Subsidiary of Drilex ("Drilex Litigation"), and Drilex and its
     Subsidiaries have no knowledge of any facts that are likely to give rise to
     any Drilex Litigation, that (in any case) is reasonably likely to have a
     Material Adverse Effect on Drilex, nor is there any judgment, decree,
     injunction, rule or order of any Governmental Entity or arbitrator
     outstanding against Drilex or any Subsidiary of Drilex ("Drilex Order")
     that is reasonably likely to have a Material Adverse Effect on Drilex or
     its ability to consummate the transactions contemplated by this Agreement.
     In addition, the aggregate reasonable estimate of uninsured exposures or
     losses under all claims and judgments pending, or to the best knowledge of
     Drilex as of the date hereof, threatened, pursuant to all Drilex Litigation
     and Drilex Orders, existing on the date hereof, excluding individual,
     unrelated claims or judgments of less than $100,000 each, does not exceed
     $5,000,000.
 
        (k) Taxes.
 
             (i) Except as set forth on Schedule 3.1(k)(i), each of Drilex, each
        of its Subsidiaries and any affiliated, consolidated, combined, unitary
        or similar group of which any such corporation is or was a member has
        (A) duly filed on a timely basis (taking into account any extensions)
        all federal and all material state, local, foreign and other returns,
        declarations, reports, estimates, information returns and statements
        ("Returns") required to be filed or sent by or with respect to it in
        respect of any Taxes (as hereinafter defined), (B) duly paid or
        deposited on a timely basis all Taxes that are due and payable (except
        for audit adjustments not material in the aggregate or to the extent
        that liability therefor is reserved for in Drilex's most recent audited
        financial statements) for which Drilex or any of its Subsidiaries may be
        liable, (C) established reserves that are adequate for the payment of
        all Taxes not yet due and payable with respect to the results of
        operations of Drilex and its Subsidiaries
 
                                       10
<PAGE>   17
 
        through the date hereof, and (D) complied in all material respects with
        all applicable laws, rules and regulations relating to the reporting,
        payment and withholding of Taxes and has in all material respects timely
        withheld from employee wages and paid over to the proper governmental
        authorities all amounts required to be so withheld and paid over.
 
             (ii) Schedule 3.1(k)(ii) sets forth (A) the last taxable period
        through which the federal income Tax Returns of Drilex and any of its
        Subsidiaries have been examined by the Internal Revenue Service ("IRS")
        or otherwise closed and (B) any affiliated, consolidated, combined,
        unitary or similar group or Return in which Drilex or any of its
        Subsidiaries is or has been a member or is or has joined in the filing.
        Except to the extent being contested in good faith, all material
        deficiencies asserted as a result of such examinations and any
        examination by any applicable taxing authority have been paid, fully
        settled or adequately provided for in Drilex's most recent audited
        financial statements. Except as adequately provided for in the Drilex
        SEC Documents, no material audits or other administrative proceedings or
        court proceedings are presently pending with regard to any Taxes for
        which Drilex or any of its Subsidiaries would be liable, and no material
        deficiency for any Taxes has been proposed, asserted or assessed
        pursuant to such examination against Drilex or any of its Subsidiaries
        by any authority with respect to any period other than as set forth in
        Schedule 3.1(k)(ii).
 
             (iii) Except as disclosed on Schedule 3.1(k)(iii), neither Drilex
        nor any of its Subsidiaries has executed or entered into (or prior to
        the close of business on the Closing Date will execute or enter into)
        with the IRS or any taxing authority (i) any agreement or other document
        extending or having the effect of extending the period for assessments
        or collection of any income or franchise Taxes for which Drilex or any
        of its Subsidiaries would be liable or (ii) a closing agreement pursuant
        to Section 7121 of the Code, or any predecessor provision thereof or any
        similar provision of state, local, foreign or other income tax law that
        relates to the assets or operations of Drilex or any of its
        Subsidiaries.
 
             (iv) Neither Drilex nor any of its Subsidiaries is a party to an
        agreement that provides for the payment of any amount that would
        constitute an "excess parachute payment" within the meaning of Section
        280G of the Code.
 
             (v) Neither Drilex nor any of its Subsidiaries has made an election
        under Section 341(f) of the Code or agreed to have Section 341(f)(2) of
        the Code apply to any disposition of a subsection (f) asset (as such
        term is defined in Section 341(f)(4) of the Code) owned by Drilex or any
        of its Subsidiaries.
 
             (vi) Except as set forth in Drilex SEC Documents or as disclosed on
        Schedule 3.1(k)(vi), neither Drilex nor any of its Subsidiaries is a
        party to, is bound by or has any obligation under any tax sharing or
        allocation agreement or similar agreement or arrangement.
 
          For purposes of this Agreement, "Taxes" shall mean all federal, state,
     county, local, foreign or other taxes, charges, fees, levies, imposts,
     duties, licenses or other assessments, together with any interest,
     penalties, additions to tax or additional amounts imposed by any taxing
     authority.
 
          (l) Pension and Benefit Plans; ERISA.
 
             (i) All "employee pension plans," as defined in Section 3(2) of the
        Employee Retirement Income Security Act of 1974, as amended ("ERISA"),
        maintained by Drilex or any of its Subsidiaries or any trade or business
        (whether or not incorporated) which is under common control, or which is
        treated as a single employer, with Drilex under Section 414(b), (c), (m)
        or (o) of the Code ("Drilex ERISA Affiliate") or to which Drilex or any
        of its Subsidiaries or any Drilex ERISA Affiliate contributed or is
        obligated to contribute thereunder (the "Drilex Pension Plans") intended
        to qualify under Section 401 of the Code so qualify and the trusts
        maintained pursuant thereto are exempt from federal income taxation
        under Section 501 of the Code, and, to the best knowledge of Drilex as
        of the date hereof, nothing has occurred with respect to the operation
        of the Drilex Pension Plans that could reasonably be expected to cause
        the loss of such qualification or exemption or the
 
                                       11
<PAGE>   18
 
        imposition of any liability, penalty, or tax under ERISA or the Code
        that is reasonably likely to have a Material Adverse Effect on Drilex.
 
             (ii) Except as disclosed in Schedule 3.1(l)(ii), there has been no
        "reportable event" as that term is defined in Section 4043 of ERISA and
        the regulations thereunder with respect to the Drilex Pension Plans
        subject to Title IV of ERISA that would require the giving of notice or
        any event requiring disclosure under Section 4041(c)(3)(C) or 4063(a) of
        ERISA.
 
             (iii) As to the Drilex Pension Plans and as to the "employee
        pension benefit plans" maintained or contributed to by Drilex, its
        Subsidiaries or by any Drilex ERISA Affiliate within six years prior to
        the Effective Time subject to Title IV of ERISA, there has been no event
        or condition which presents a material risk of termination, no notice of
        intent to terminate has been given under Section 4041 of ERISA and no
        proceeding has been instituted under Section 4042 of ERISA to terminate,
        such that would result in a material liability to Drilex, its
        Subsidiaries, or Drilex ERISA Affiliates; no material liability to the
        Pension Benefit Guaranty Corporation ("PBGC") has been incurred; no
        material accumulated funding deficiency, whether or not waived, within
        the meaning of Section 302 of ERISA or Section 412 of the Code has been
        incurred; and the assets of each Drilex Pension Plan equal or exceed the
        actuarial present value of the benefit liabilities, within the meaning
        of Section 4041 of ERISA, under such Drilex Pension Plan, based upon
        reasonable actuarial assumptions and the asset valuation principles
        established by the PBGC.
 
             (iv) There is no violation of ERISA with respect to the filing of
        applicable reports, documents, and notices regarding all the "employee
        benefit plans," as defined in Section 3(3) of the ERISA and all other
        material employee compensation and benefit arrangements or payroll
        practices, including, without limitation, severance pay, sick leave,
        vacation pay, salary continuation for disability, consulting or other
        compensation agreements, retirement, deferred compensation, bonus,
        long-term incentive, stock option, stock purchase, hospitalization,
        medical insurance, life insurance and scholarship programs maintained by
        Drilex or any of its Subsidiaries or to which Drilex or any of its
        Subsidiaries contributed or is obligated to contribute thereunder (all
        such plans, other than the Drilex Pension Plans, being hereinafter
        referred to as the "Drilex Employee Benefit Plans"), or Drilex Pension
        Plans with the Secretary of Labor and the Secretary of the Treasury or
        the furnishing of such documents to the participants or beneficiaries of
        the Drilex Employee Benefit Plans or Drilex Pension Plans, which
        violation is reasonably likely to have a Material Adverse Effect on
        Drilex.
 
             (v) Except as disclosed on Schedule 3.1(l)(v), the Drilex Employee
        Benefit Plans and Drilex Pension Plans have been maintained, in all
        material respects, in accordance with their terms and with all
        provisions of ERISA (including rules and regulations thereunder) and
        other applicable Federal and state law, all contributions to the Drilex
        Employee Benefit Plans and Drilex Pension Plans have been timely made
        pursuant to their terms, there is no material liability for breaches of
        fiduciary duty in connection with the Drilex Employee Benefit Plans and
        Drilex Pension Plans, there have been no material defaults, violations,
        actions, suits or claims pending (except ordinary claims for benefits),
        or to the knowledge of Drilex, threatened respecting the Drilex Employee
        Benefit Plans and Drilex Pension Plans, and neither Drilex nor any of
        its Subsidiaries has engaged in a material "prohibited transaction"
        within the meaning of Section 4975 of the Code or Section 406 of ERISA
        with respect to the Drilex Employee Benefit Plans and Drilex Pension
        Plans.
 
             (vi) Except as disclosed or referenced on Schedule 5.9, neither the
        execution and delivery of this Agreement nor the consummation of the
        transactions contemplated hereby will (i) result in any payment becoming
        due to any employee or group of employees of Drilex or any of its
        Subsidiaries; (ii) increase any benefits otherwise payable under any
        Drilex Employee Benefit Plan or Drilex Pension Plan or the profit
        sharing plan of Drilex or (iii) result in the acceleration of the time
        of payment or vesting of any such benefits. Except as disclosed or
        referenced on Schedule 5.9 or in the Drilex SEC Documents, there are no
        severance agreements or employment agreements between Drilex or any of
        its Subsidiaries and any employee of Drilex or such Subsidiary.
 
                                       12
<PAGE>   19
 
             True and correct copies of all such severance agreements and
        employment agreements have been provided to Baker Hughes. Except as set
        forth or otherwise referenced on Schedule 5.9, neither Drilex nor any of
        its Subsidiaries has any consulting agreement or arrangement with any
        person involving compensation in excess of $50,000, except as are
        terminable upon one month's notice or less.
 
             (vii) No stock or other security issued by Drilex or any of its
        subsidiaries forms or has formed a material part of the assets of any
        funded Drilex Employee Benefit Plan or Drilex Pension Plan.
 
             (viii) Neither Drilex nor any of its Subsidiaries nor any Drilex
        ERISA Affiliate contributes to, or has an obligation to contribute to,
        and has not within six years prior to the Effective Time contributed to,
        or had an obligation to contribute to, a multiemployer plan within the
        meaning of Section 3(37) of ERISA.
 
          (m) Labor Matters.
 
             (i) Except as set forth in Schedule 3.1(m)(i) hereto, as of the
        date of this Agreement, (1) no employees of Drilex or any of its
        Subsidiaries are represented by any labor organization; (2) no labor
        organization or group of employees of Drilex or any of its Subsidiaries
        has made a pending demand for recognition or certification, and there
        are no representation or certification proceedings or petitions seeking
        a representation proceeding presently pending or threatened in writing
        to be brought or filed with the National Labor Relations Board or any
        other labor relations tribunal or authority; and (3) to the knowledge of
        Drilex, there are no organizing activities involving Drilex or any of
        its Subsidiaries pending with any labor organization or group of
        employees of Drilex or any of its Subsidiaries.
 
             (ii) Except as set forth on Schedule 3.1(m)(ii) hereto, Drilex and
        each of its Subsidiaries is in compliance with all laws and orders
        relating to the employment of labor, including all such laws and orders
        relating to wages, hours, collective bargaining, discrimination, civil
        rights, safety and health, workers' compensation and the collection and
        payment of withholding and/or Social Security Taxes and similar Taxes,
        except where the failure to comply would not have a Material Adverse
        Effect on Drilex.
 
          (n) Intangible Property. Drilex and its Subsidiaries possess or have
     adequate rights to use all material trademarks, trade names, patents,
     service marks, brand marks, brand names, computer programs, databases,
     industrial designs and copyrights necessary for the operation of the
     businesses of each of Drilex and its Subsidiaries (collectively, the
     "Drilex Intangible Property"), except where the failure to possess or have
     adequate rights to use such properties would not reasonably be expected to
     have a Material Adverse Effect on Drilex. Except as set forth on Schedule
     3.1(n), all of the Drilex Intangible Property is owned by Drilex or its
     Subsidiaries free and clear of any and all liens, claims or encumbrances,
     except those that are not reasonably likely to have a Material Adverse
     Effect on Drilex, and neither Drilex nor any such Subsidiary has forfeited
     or otherwise relinquished any Drilex Intangible Property which forfeiture
     would result in a Material Adverse Effect. To the knowledge of Drilex, the
     use of the Drilex Intangible Property by Drilex or its Subsidiaries does
     not, in any material respect, conflict with, infringe upon, violate or
     interfere with or constitute an appropriation of any right, title, interest
     or goodwill, including, without limitation, any intellectual property
     right, trademark, trade name, patent, service mark, brand mark, brand name,
     computer program, database, industrial design, copyright or any pending
     application therefor of any other person and there have been no claims made
     and neither Drilex nor any of its Subsidiaries has received any notice of
     any claim or otherwise knows that any of the Drilex Intangible Property is
     invalid or conflicts with the asserted rights of any other person or has
     not been used or enforced or has been failed to be used or enforced in a
     manner that would result in the abandonment, cancellation or
     unenforceability of any of the Drilex Intangible Property, except for any
     such conflict, infringement, violation, interference, claim, invalidity,
     abandonment, cancellation or unenforceability that would not reasonably be
     expected to have a Material Adverse Effect.
 
                                       13
<PAGE>   20
 
          (o) Environmental Matters.
 
          For purposes of this Agreement:
 
             (A) "Environmental Law" means any applicable law regulating or
        prohibiting Releases into any part of the natural environment, or
        pertaining to the protection of natural resources, the environment and
        public and employee health and safety including, without limitation, the
        Comprehensive Environmental Response, Compensation, and Liability Act
        ("CERCLA") (42 U.S.C. Section 9601 et seq.), the Hazardous Materials
        Transportation Act (49 U.S.C. Section 1801 et seq.), the Resource
        Conservation and Recovery Act (42 U.S.C. Section 6901 et seq.), the
        Clean Water Act (33 U.S.C. Section 1251 et seq.), the Clean Air Act (33
        U.S.C. Section 7401 et seq.), the Toxic Substances Control Act (15
        U.S.C. Section 7401 et seq.), the Federal Insecticide, Fungicide, and
        Rodenticide Act (7 U.S.C. Section 136 et seq.), and the Occupational
        Safety and Health Act (29 U.S.C. Section 651 et seq.) ("OSHA") and the
        regulations promulgated pursuant thereto, and any such applicable state
        or local statutes, and the regulations promulgated pursuant thereto, as
        such laws have been and may be amended or supplemented through the
        Closing Date.
 
             (B) "Hazardous Material" means any substance, material or waste
        which is regulated pursuant to any Environmental Law by any public or
        governmental authority in the jurisdictions in which the applicable
        party or its Subsidiaries conducts business, or the United States,
        including, without limitation, any material or substance which is
        defined as a "hazardous waste," "hazardous material," "hazardous
        substance," "extremely hazardous waste" or "restricted hazardous waste,"
        "contaminant," "toxic waste" or "toxic substance" under any provision of
        Environmental Law;
 
             (C) "Release" means any release, spill, effluent, emission,
        leaking, pumping, injection, deposit, disposal, discharge, dispersal,
        leaching or migration into the indoor or outdoor environment, or into or
        out of any property owned, operated or leased by the applicable party or
        its Subsidiaries; and
 
             (D) "Remedial Action" means all actions, including, without
        limitation, any capital expenditures, required by a governmental entity
        or required under any Environmental Law, or voluntarily undertaken to
        (I) clean up, remove, treat, or in any other way ameliorate or address
        any Hazardous Materials or other substance in the indoor or outdoor
        environment; (II) prevent the Release or threat of Release, or minimize
        the further Release of any Hazardous Material so it does not endanger or
        threaten to endanger the public health or welfare of the indoor or
        outdoor environment; (III) perform pre-remedial studies and
        investigations or post-remedial monitoring and care pertaining or
        relating to a Release; or (IV) bring the applicable party into
        compliance with any Environmental Law.
 
                (i) Except as disclosed on Schedule 3.1(o), the operations of
           Drilex and its Subsidiaries have been and, as of the Closing Date,
           will be, in compliance with all Environmental Laws, except where the
           failure to so comply would not reasonably be expected to have a
           Material Adverse Effect on Drilex;
 
                (ii) Except as disclosed on Schedule 3.1(o), Drilex and its
           Subsidiaries have obtained and will, as of the Closing Date, maintain
           all permits required under applicable Environmental Laws for the
           continued operations of their respective businesses, except such
           permits the lack of which would not reasonably be expected to lead to
           a Material Adverse Effect on Drilex;
 
                (iii) Except as disclosed on Schedule 3.1(o), as of the date
           hereof Drilex and its Subsidiaries are not subject to any material
           (individually or in the aggregate) outstanding written orders or
           material contracts with any Governmental Entity or other person
           respecting (A) Environmental Laws, (B) Remedial Action or (C) any
           Release or threatened Release of a Hazardous Material;
 
                (iv) Except as disclosed on Schedule 3.1(o), Drilex and its
           Subsidiaries have not received any written communication alleging,
           with respect to any such party, the violation of or liability
 
                                       14
<PAGE>   21
 
           under any Environmental Law, which violation or liability would
           reasonably be expected to have a Material Adverse Effect on Drilex;
 
                (v) Except as disclosed on Schedule 3.1(o), neither Drilex nor
           any of its Subsidiaries has any contingent liability in connection
           with the Release of any Hazardous Material into the indoor or outdoor
           environment (whether on-site or off-site) that would reasonably be
           expected to lead to a Material Adverse Effect on Drilex;
 
                (vi) Except as disclosed on Schedule 3.1(o), the operations of
           Drilex or its Subsidiaries involving the generation, transportation,
           treatment, storage or disposal of hazardous waste, as defined and
           regulated under 40 C.F.R. Parts 260-270 (in effect as of the date of
           this Agreement) or any state equivalent, are in compliance with
           applicable Environmental Laws, except where the failure to so comply
           would not reasonably be expected to have a Material Adverse Effect on
           Drilex; and
 
                (vii) Except as disclosed on Schedule 3.1(o), to the knowledge
           of Drilex as of the date hereof, there is not now on or in any
           property of Drilex or its Subsidiaries any of the following: (A) any
           underground storage tanks or surface impoundments, (B) any
           asbestos-containing materials, or (C) any polychlorinated biphenyls,
           any of which ((A), (B), or (C) preceding) could reasonably be
           expected to have a Material Adverse Effect on Drilex.
 
          (p) Opinion of Financial Advisor. Drilex has received the opinion of
     Merrill Lynch & Co to the effect that, as of the date hereof, the
     consideration to be received by the holders of Drilex Common Stock pursuant
     to this Agreement is fair from a financial point of view to such holders.
 
          (q) Vote Required. The affirmative vote of the holders of a majority
     of the outstanding shares of Drilex Common Stock is the only vote of the
     holders of any class or series of Drilex capital stock necessary to approve
     this Agreement and the transactions contemplated hereby.
 
          (r) Beneficial Ownership of Baker Hughes Common Stock. As of the date
     hereof, assuming the accuracy of the representation set forth in Section
     3.2(b), neither Drilex nor its Subsidiaries "beneficially owns" (as defined
     in Rule 13d-3 under the Exchange Act) in the aggregate one percent (1%) or
     more of the outstanding Baker Hughes Common Stock.
 
          (s) Insurance. Drilex has delivered to Baker Hughes an insurance
     schedule of Drilex's and each of its Subsidiaries' directors' and officers'
     liability insurance, primary and excess casualty insurance policies,
     providing coverage for bodily injury and property damage to third parties,
     including products liability and completed operations coverage, and
     worker's compensation, in effect as of the date hereof. Drilex maintains
     insurance coverage reasonably adequate for the operation of the business of
     Drilex and each of its Subsidiaries (taking into account the cost and
     availability of such insurance), and the transactions contemplated hereby
     will not materially adversely affect such coverage.
 
          (t) Brokers. Except as disclosed on Schedules 3.1(t) or 5.9 hereof, no
     broker, investment banker, or other person is entitled to any broker's,
     finder's or other similar fee or commission in connection with the
     transactions contemplated by this Agreement based upon arrangements made by
     or on behalf of Drilex.
 
          (u) Tax Matters. As of the date hereof, to the knowledge of Drilex,
     the representations set forth in the numbered paragraphs of the form of
     Certificate of Drilex included as Schedule 3.1(u) are true and correct in
     all material respects, assuming for purposes of this representation and
     warranty that the Merger referred to in such form had been consummated on
     the date hereof.
 
          (v) Accounting Matters. Drilex has previously (i) requested its
     outside accountants to disclose to Baker Hughes any actions taken by Drilex
     or any of its affiliates, and (ii) accurately answered all questions posed
     by Baker Hughes, that in either such case are relevant to the determination
     of the treatment of the business combination to be effected by the Merger
     as a pooling of interests for accounting purposes.
 
                                       15
<PAGE>   22
 
     3.2 Representations and Warranties of Baker Hughes and Sub. Baker Hughes
and Sub jointly and severally represent and warrant to Drilex as follows:
 
          (a) Organization, Standing and Power. Each of Baker Hughes, Sub and
     Baker Hughes's Significant Subsidiaries is a corporation, limited liability
     company or partnership duly organized, validly existing and in good
     standing under the laws of its state or jurisdiction of incorporation or
     organization, has all requisite power and authority to own, lease and
     operate its properties and to carry on its business as now being conducted,
     and is duly qualified and in good standing to do business in each
     jurisdiction in which the business it is conducting, or the operation,
     ownership or leasing of its properties, makes such qualification necessary,
     other than in such jurisdictions where the failure so to qualify would not
     have a Material Adverse Effect on Baker Hughes. Baker Hughes and Sub have
     heretofore delivered to Drilex complete and correct copies of their
     respective Certificates of Incorporation and Bylaws.
 
          (b) Capital Structure. As of the date hereof, the authorized capital
     stock of Baker Hughes consists of 400,000,000 shares of Baker Hughes Common
     Stock and 15,000,000 shares of preferred stock, par value $1.00 per share,
     of Baker Hughes (the "Baker Hughes Preferred Stock"). At the close of
     business on March 31, 1997 (i) 145,642,230 shares of Baker Hughes Common
     Stock were issued and outstanding; (ii) 8,300,000 shares of Baker Hughes
     Common Stock were held by Baker Hughes in its treasury or by its wholly
     owned Subsidiaries, which are treated for purposes of clause (i) and
     financial reporting purposes as having been effectively retired; (iii) no
     shares of Baker Hughes Preferred Stock are issued and outstanding; and (iv)
     no Voting Debt was outstanding. All outstanding shares of Baker Hughes
     capital stock are, and the shares of Baker Hughes Common Stock when issued
     in accordance with this Agreement, and upon exercise of the Drilex Stock
     Options (as defined in Section 5.10) and the Drilex Warrants to be assumed
     pursuant to the Merger, will be, validly issued, fully paid and
     nonassessable and not subject to preemptive rights. Except as set forth on
     Schedule 3.2(b), all outstanding shares of capital stock of the Significant
     Subsidiaries of Baker Hughes are owned by Baker Hughes or a direct or
     indirect wholly owned Subsidiary of Baker Hughes, free and clear of all
     liens, charges, encumbrances, claims and options of any nature. Except as
     set forth in this Section 3.2(b) or on Schedule 3.2(b) or as described in
     the Baker Hughes SEC Documents and except for changes since March 31, 1997
     resulting from the exercise of employee stock options or convertible
     debentures granted pursuant to, or from issuances or purchases under, plans
     described in the Baker Hughes SEC Documents (as defined herein)
     (collectively, the "Baker Hughes Equity Plans"), or as contemplated by this
     Agreement, there are outstanding: (i) no shares of capital stock, Voting
     Debt or other voting securities of Baker Hughes; (ii) no securities of
     Baker Hughes or any Subsidiary of Baker Hughes convertible into or
     exchangeable for shares of capital stock, Voting Debt or other voting
     securities of Baker Hughes or any Subsidiary of Baker Hughes; and (iii) no
     options, warrants, calls, rights (including preemptive rights), commitments
     or agreements to which Baker Hughes or any Subsidiary of Baker Hughes is a
     party or by which it is bound in any case obligating Baker Hughes or any
     Subsidiary of Baker Hughes to issue, deliver, sell, purchase, redeem or
     acquire, or cause to be issued, delivered, sold, purchased, redeemed or
     acquired, additional shares of capital stock or any Voting Debt or other
     voting securities of Baker Hughes or of any Subsidiary of Baker Hughes or
     obligating Baker Hughes or any Subsidiary of Baker Hughes to grant, extend
     or enter into any such option, warrant, call, right, commitment or
     agreement. There are not as of the date hereof and there will not be at the
     Effective Time any stockholder agreements, voting trusts or other
     agreements or understandings to which Baker Hughes is a party or by which
     it is bound relating to the voting of any shares of the capital stock of
     Baker Hughes. As of the date hereof, the authorized capital stock of Sub
     consists of 1,000 shares of common stock, par value $0.01 per share, 1,000
     shares of which are validly issued, fully paid and nonassessable and are
     owned by Baker Hughes and the balance of which are not issued or
     outstanding.
 
          (c) Authority; No Violations, Consents and Approvals.
 
             (i) Each of Baker Hughes and Sub have all requisite corporate power
        and authority to enter into this Agreement and to consummate the
        transactions contemplated hereby. The execution and delivery of this
        Agreement and the consummation of the transactions contemplated hereby,
        including but not limited to the issuance of the Baker Hughes Common
        Stock pursuant to the
 
                                       16
<PAGE>   23
 
        Merger, have been duly authorized by all necessary corporate action on
        the part of Baker Hughes and Sub. This Agreement has been duly executed
        and delivered by Baker Hughes and Sub and, assuming this Agreement
        constitutes the valid and binding obligation of Drilex, constitutes a
        valid and binding obligation of each of Baker Hughes and Sub enforceable
        in accordance with its terms, subject, as to enforceability, to
        bankruptcy, insolvency, reorganization and other laws of general
        applicability relating to or affecting creditors' rights and to general
        principles of equity.
 
             (ii) The execution and delivery of this Agreement does not, and the
        consummation of the transactions contemplated hereby and compliance with
        the provisions hereof will not, conflict with, or result in any
        violation of, or default (with or without notice or lapse of time, or
        both) under, or give rise to a right of termination, cancellation or
        acceleration of any obligation or to the loss of a material benefit
        under, or give rise to a right of purchase under, result in the creation
        of any lien, security interest, charge or encumbrance upon any of the
        properties or assets of Baker Hughes or any of its Subsidiaries under,
        or otherwise result in a detriment to Baker Hughes or any of its
        Subsidiaries under, any provision of (i) the Certificate of
        Incorporation or Bylaws of Baker Hughes or any provision of the
        comparable charter or organizational documents of any of its
        Subsidiaries, (ii) any loan or credit agreement, note, bond, mortgage,
        indenture, lease or other agreement, instrument, permit, concession,
        franchise or license applicable to Baker Hughes or any of its
        Subsidiaries, (iii) any joint venture or other ownership arrangement or
        (iv) assuming the consents, approvals, authorizations or permits and
        filings or notifications referred to in Section 3.2(c)(iii) are duly and
        timely obtained or made, any judgment, order, decree, statute, law,
        ordinance, rule or regulation applicable to Baker Hughes or any of its
        Subsidiaries or any of their respective properties or assets, other
        than, in the case of clause (ii), (iii) or (iv), any such conflicts,
        violations, defaults, rights, liens, security interests, charges,
        encumbrances or detriments that, individually or in the aggregate, would
        not have a Material Adverse Effect on Baker Hughes, materially impair
        the ability of Baker Hughes to perform its obligations hereunder or
        thereunder or prevent the consummation of any of the transactions
        contemplated hereby or thereby.
 
             (iii) No consent, approval, order or authorization of, or
        registration, declaration or filing with, or permit from any
        Governmental Entity is required by or with respect to Baker Hughes or
        any of its Subsidiaries in connection with the execution and delivery of
        this Agreement by Baker Hughes and Sub or the consummation by Baker
        Hughes and Sub of the transactions contemplated hereby, as to which the
        failure to obtain or make would have a Material Adverse Effect on Baker
        Hughes, except for: (A) the filing of a premerger notification report by
        Baker Hughes under the HSR Act and the expiration or termination of the
        applicable waiting period with respect thereto; (B) the filing with the
        SEC of the Proxy Statement, the S-4, such reports under Section 13(a) of
        the Exchange Act and such other compliance with the Securities Act and
        the Exchange Act and the rules and regulations thereunder as may be
        required in connection with this Agreement and the transactions
        contemplated hereby, and the obtaining from the SEC of such orders as
        may be so required; (C) the filing of the Certificate of Merger with the
        Secretary of State of the State of Delaware; (D) filings with, and
        approval of, the NYSE; (E) such filings and approvals as may be required
        by any applicable state securities, "blue sky" or takeover laws or
        environmental laws; and (F) such filings and approvals as may be
        required by any foreign premerger notification, securities, corporate or
        other law, rule or regulation.
 
          (d) SEC Documents. Baker Hughes has made available to Drilex a true
     and complete copy of each report, schedule, registration statement and
     definitive proxy statement filed by Baker Hughes with the SEC since
     September 30, 1996 and prior to the date of this Agreement (the "Baker
     Hughes SEC Documents"), which are all the documents (other than preliminary
     material) that Baker Hughes was required to file with the SEC since such
     date. As of their respective dates, the Baker Hughes SEC Documents complied
     in all material respects with the requirements of the Securities Act or the
     Exchange Act, as the case may be, and the rules and regulations of the SEC
     thereunder applicable to such Baker Hughes SEC Documents, and none of the
     Baker Hughes SEC Documents contained any untrue statement of a material
     fact or omitted to state a material fact required to be stated therein or
     necessary
 
                                       17
<PAGE>   24
 
     to make the statements therein, in light of the circumstances under which
     they were made, not misleading. The financial statements of Baker Hughes
     included in the Baker Hughes SEC Documents complied as to form in all
     material respects with the published rules and regulations of the SEC with
     respect thereto, were prepared in accordance with GAAP applied on a
     consistent basis during the periods involved (except as may be indicated in
     the notes thereto or, in the case of the unaudited statements, as permitted
     by Rule 10-01 of Regulation S-X of the SEC) and fairly present in
     accordance with applicable requirements of GAAP (subject, in the case of
     the unaudited statements, to normal, recurring adjustments, none of which
     will be material) the consolidated financial position of Baker Hughes and
     its consolidated Subsidiaries as of their respective dates and the
     consolidated results of operations and the consolidated cash flows of Baker
     Hughes and its consolidated Subsidiaries for the periods presented therein.
 
          (e) Information Supplied. None of the information supplied or to be
     supplied by Baker Hughes or Sub for inclusion or incorporation by reference
     in the S-4 will, at the time the S-4 becomes effective under the Securities
     Act or at the Effective Time, contain any untrue statement of a material
     fact or omit to state any material fact required to be stated therein or
     necessary to make the statements therein not misleading, and none of the
     information supplied or to be supplied by Baker Hughes or Baker Hughes Sub
     and included or incorporated by reference in the Proxy Statement will, at
     the date mailed to stockholders of Drilex or at the time of the meeting of
     such stockholders to be held in connection with the Merger or at the
     Effective Time, 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 therein, in light of the circumstances under which
     they are made, not misleading. If at any time prior to the Effective Time
     any event with respect to Baker Hughes or any of its Subsidiaries, or with
     respect to other information supplied by Baker Hughes or Sub for inclusion
     in the Proxy Statement or S-4, shall occur which is required to be
     described in an amendment of, or a supplement to, the Proxy Statement or
     the S-4, such event shall be so described, and such amendment or supplement
     shall be promptly filed with the SEC. The Proxy Statement, insofar as it
     relates to Baker Hughes, Sub or other Subsidiaries of Baker Hughes or other
     information supplied by Baker Hughes or Sub for inclusion therein, will
     comply as to form in all material respects with the provisions of the
     Exchange Act and the rules and regulations thereunder.
 
          (f) Absence of Certain Changes or Events. Except as disclosed in, or
     reflected in the financial statements included in, the Baker Hughes SEC
     Documents or on Schedule 3.2(f), or except as contemplated by this
     Agreement, since September 30, 1996, there has not been: (i) any
     declaration, setting aside or payment of any dividend or other distribution
     (whether in cash, stock or property) with respect to any of Baker Hughes's
     capital stock, except for regular quarterly cash dividends not in excess of
     $.115 per share on Baker Hughes Common Stock (or a pro rata amount for any
     dividend less than a full quarter) with usual record and payment dates for
     such dividends; (ii) any amendment of any material term of any outstanding
     equity security of Baker Hughes or any Significant Subsidiary; (iii) any
     repurchase, redemption or other acquisition by Baker Hughes or any
     Subsidiary of any outstanding shares of capital stock or other equity
     securities of, or other ownership interests in, Baker Hughes or any
     Subsidiary, except as contemplated by Baker Hughes Benefit Plans; (iv) any
     material change in any method of accounting or accounting practice or any
     tax method, practice or election by Baker Hughes or any Subsidiary; or (v)
     any other transaction, commitment, dispute or other event or condition
     (financial or otherwise) of any character (whether or not in the ordinary
     course of business) that has had a Material Adverse Effect on Baker Hughes,
     except for general economic changes and changes that may affect the
     industries of Baker Hughes or any of its Subsidiaries generally.
 
          (g) No Undisclosed Material Liabilities. Except as disclosed in the
     Baker Hughes SEC Documents or on Schedule 3.2(g), as of the date hereof,
     there are no liabilities of Baker Hughes or any of its Subsidiaries of any
     kind whatsoever, whether accrued, contingent, absolute, determined,
     determinable or otherwise, that are reasonably likely to have a Material
     Adverse Effect on Baker Hughes, other than: (i) liabilities adequately
     provided for on the balance sheet of Baker Hughes dated as of December 31,
     1996 (including the notes thereto) contained in Baker Hughes's Quarterly
     Report on Form 10-Q for the quarter ended December 31, 1996; and (ii)
     liabilities under this Agreement.
 
                                       18
<PAGE>   25
 
          (h) No Default. Neither Baker Hughes nor any of its Subsidiaries is in
     default or violation (and no event has occurred which, with notice or the
     lapse of time or both, would constitute a default or violation) of any
     term, condition or provision of (i) their respective charter and by-laws,
     (ii) except as disclosed in Schedule 3.2(h), any note, bond, mortgage,
     indenture, license, agreement or other instrument or obligation to which
     Baker Hughes or any of its Subsidiaries is now a party or by which Baker
     Hughes or any of its Subsidiaries or any of their respective properties or
     assets may be bound (except for the requirement under certain of such
     instruments to file supplemental indentures as a result of the transactions
     contemplated hereby) or (iii) any order, writ, injunction, decree, statute,
     rule or regulation applicable to Baker Hughes or any of its Subsidiaries,
     except in the case of (ii) and (iii) for defaults or violations which in
     the aggregate would not have a Material Adverse Effect on Baker Hughes.
 
          (i) Compliance with Applicable Laws. Baker Hughes and its Subsidiaries
     hold all permits, licenses, variances, exemptions, orders, franchises and
     approvals of all Governmental Entities necessary for the lawful conduct of
     their respective businesses (the "Baker Hughes Permits"), except where the
     failure so to hold would not have a Material Adverse Effect on Baker
     Hughes. Baker Hughes and its Subsidiaries are in compliance with the terms
     of the Baker Hughes Permits, except where the failure so to comply would
     not have a Material Adverse Effect on Baker Hughes. Except as disclosed in
     the Baker Hughes SEC Documents or as set forth in Schedules 3.2(i), 3.2(j),
     3.2(k), 3.2(m) or 3.2(o), the businesses of Baker Hughes and its
     Subsidiaries are not being conducted in violation of any law, ordinance or
     regulation of any Governmental Entity, except for possible violations which
     would not have a Material Adverse Effect on Baker Hughes. Except as set
     forth on Schedule 3.2(i), as of the date of this Agreement, no
     investigation or review by any Governmental Entity with respect to Baker
     Hughes or any of its Subsidiaries is pending or, to the best knowledge of
     Baker Hughes as of the date hereof, threatened, other than those the
     outcome of which would not have a Material Adverse Effect on Baker Hughes.
 
          (j) Litigation. Except as disclosed in the Baker Hughes SEC Documents
     or on Schedule 3.2(j) hereto, there is no suit, action or proceeding
     pending, or, to the best knowledge of Baker Hughes, threatened against or
     affecting Baker Hughes or any Subsidiary of Baker Hughes ("Baker Hughes
     Litigation"), and Baker Hughes and its Subsidiaries have no knowledge of
     any facts that are likely to give rise to any Baker Hughes Litigation, that
     (in any case) is reasonably likely to have a Material Adverse Effect on
     Baker Hughes, nor is there any judgment, decree, injunction, rule or order
     of any Governmental Entity or arbitrator outstanding against Baker Hughes
     or any Subsidiary of Baker Hughes ("Baker Hughes Order") that is reasonably
     likely to have a Material Adverse Effect on Baker Hughes or its ability to
     consummate the transactions contemplated by this Agreement. In addition,
     the aggregate reasonable estimate of uninsured exposures or losses under
     all claims and judgments pending, or to the best knowledge of Baker Hughes,
     threatened, pursuant to all Baker Hughes Litigation and Baker Hughes
     Orders, existing on the date hereof, excluding individual, unrelated claims
     or judgments of less than $1,500,000 each, does not exceed $70,000,000.
 
        (k) Taxes.
 
             (i) Except as set forth on Schedule 3.2(k)(i), each of Baker
        Hughes, each of its Subsidiaries and any affiliated, consolidated,
        combined, unitary or similar group of which any such corporation is or
        was a member has (A) duly filed on a timely basis (taking into account
        any extensions) all federal and all material state, local, foreign and
        other Returns, required to be filed or sent by or with respect to it in
        respect of any Taxes, (B) duly paid or deposited on a timely basis all
        Taxes that are due and payable (except for audit adjustments not
        material in the aggregate or to the extent that liability therefor is
        reserved for in Baker Hughes's most recent audited financial statements)
        for which Baker Hughes or any of its Subsidiaries may be liable, (C)
        established reserves that are adequate for the payment of all Taxes not
        yet due and payable with respect to the results of operations of Baker
        Hughes and its Subsidiaries through the date hereof, and (D) complied in
        all material respects with all applicable laws, rules and regulations
        relating to the reporting, payment and withholding of Taxes and has in
        all material respects timely withheld from employee wages and paid over
        to the proper governmental authorities all amounts required to be so
        withheld and paid over.
 
                                       19
<PAGE>   26
 
             (ii) Schedule 3.2(k)(ii) sets forth the last taxable period through
        which the federal income Tax Returns of Baker Hughes and any of its
        Subsidiaries have been examined by the IRS or otherwise closed. Except
        to the extent being contested in good faith, all deficiencies asserted
        as a result of such examinations and any examination by any applicable
        taxing authority have been paid, fully settled or adequately provided
        for in Baker Hughes's most recent audited financial statements. Except
        as adequately provided for in the Baker Hughes SEC Documents, no
        material audits or other administrative proceedings or court proceedings
        are presently pending with regard to any Taxes for which Baker Hughes or
        any of its Subsidiaries would be liable, and no material deficiency for
        any Taxes has been proposed, asserted or assessed pursuant to such
        examination against Baker Hughes or any of its Subsidiaries by any
        taxing authority with respect to any period other than as set forth in
        Schedule 3.2(k)(ii).
 
             (iii) Except as disclosed on Schedule 3.2(k)(iii), neither Baker
        Hughes nor any of its Subsidiaries has executed or entered into (or
        prior to the close of business on the Closing Date will execute or enter
        into) with the IRS or any taxing authority (i) any agreement or other
        document extending or having the effect of extending the period for
        assessments or collection of any income or franchise Taxes for which
        Baker Hughes or any of its Subsidiaries would be liable or (ii) a
        closing agreement pursuant to Section 7121 of the Code, or any
        predecessor provision thereof or any similar provision of state, local,
        foreign or other income tax law that relates to the assets or operations
        of Baker Hughes or any of its Subsidiaries.
 
             (iv) Neither Baker Hughes nor any of its Subsidiaries has made an
        election under Section 341(f) of the Code or agreed to have Section
        341(f)(2) of the Code apply to any disposition of a subsection (f) asset
        (as such term is defined in Section 341(f)(4) of the Code) owned by
        Baker Hughes or any of its Subsidiaries.
 
          (l) Pension and Benefit Plans; ERISA.
 
             (i) All "employee pension plans," as defined in Section 3(2) of
        ERISA, maintained by Baker Hughes or any of its Subsidiaries or any
        trade or business (whether or not incorporated) which is under common
        control, or which is treated as a single employer, with Baker Hughes
        under Section 414(b), (c), (m) or (o) of the Code ("Baker Hughes ERISA
        Affiliate") or to which Baker Hughes or any of its Subsidiaries or any
        Baker Hughes ERISA Affiliate contributed or is obligated to contribute
        thereunder (the "Baker Hughes Pension Plans") intended to qualify under
        Section 401 of the Code so qualify and the trusts maintained pursuant
        thereto are exempt from federal income taxation under Section 501 of the
        Code, and, to the best knowledge of Baker Hughes as of the date hereof,
        nothing has occurred with respect to the operation of the Baker Hughes
        Pension Plans that could cause the loss of such qualification or
        exemption or the imposition of any liability, penalty, or tax under
        ERISA or the Code that is reasonably likely to have a Material Adverse
        Effect on Baker Hughes.
 
             (ii) There has been no "reportable event" as that term is defined
        in Section 4043 of ERISA and the regulations thereunder with respect to
        the Baker Hughes Pension Plans subject to Title IV of ERISA that would
        require the giving of notice or any event requiring disclosure under
        Section 4041(c)(3)(C) or 4063(a) of ERISA.
 
             (iii) There is no violation of ERISA with respect to the filing of
        applicable reports, documents, and notices regarding the "employee
        benefit plans," as defined in Section 3(3) of ERISA and all other
        material employee compensation and benefit arrangements or payroll
        practices including, without limitation, severance pay, sick leave,
        vacation pay, salary continuation for disability, consulting or other
        compensation agreements, retirement, deferred compensation, bonus,
        long-term incentive, stock option, stock purchase, hospitalization,
        medical insurance, life insurance and scholarship programs maintained by
        Baker Hughes or any of its Subsidiaries or to which Baker Hughes or any
        of its Subsidiaries contributed or is obligated to contribute thereunder
        (all such plans, other than the Baker Hughes Pension Plans, being
        hereinafter referred to as the "Baker Hughes Employee Benefit Plans") or
        Baker Hughes Pension Plans with the Secretary of Labor and the
 
                                       20
<PAGE>   27
 
        Secretary of the Treasury or the furnishing of such documents to the
        participants or beneficiaries of the Baker Hughes Employee Benefit Plans
        or Baker Hughes Pension Plans, which violation is reasonably likely to
        have a Material Adverse Effect on Baker Hughes.
 
             (iv) The Baker Hughes Employee Benefit Plans and Baker Hughes
        Pension Plans have been maintained, in all material respects, in
        accordance with their terms and with all provisions of ERISA (including
        rules and regulations thereunder) and other applicable Federal and state
        law, and neither Baker Hughes nor any of its Subsidiaries has engaged in
        a material "prohibited transaction" within the meaning of Section 4975
        of the Code or Section 406 of ERISA with respect to the Baker Hughes
        Employee Benefit Plans and Baker Hughes Pension Plans.
 
          (m) Labor Matters. Except as set forth on Schedule 3.2(m) hereto,
     Baker Hughes and each of its Subsidiaries is in compliance with all laws
     and orders relating to the employment of labor, including all such laws and
     orders relating to wages, hours, collective bargaining, discrimination,
     civil rights, safety and health workers' compensation and the collection
     and payment of withholding and or Social Security Taxes and similar Taxes,
     except where the failure to comply would not have a Material Adverse Effect
     on Baker Hughes.
 
          (n) Intangible Property. Baker Hughes and its Subsidiaries possess or
     have adequate rights to use all material trademarks, trade names, patents,
     service marks, brand marks, brand names, computer programs, databases,
     industrial designs and copyrights necessary for the operation of the
     businesses of each of Baker Hughes and its Subsidiaries (collectively, the
     "Baker Hughes Intangible Property"), except where the failure to possess or
     have adequate rights to use such properties would not reasonably be
     expected to have a Material Adverse Effect on Baker Hughes. Except as set
     forth on Schedule 3.2(n), all of the Baker Hughes Intangible Property is
     owned by Baker Hughes or its Subsidiaries free and clear of any and all
     liens, claims or encumbrances, except those that are not reasonably likely
     to have a Material Adverse Effect on Baker Hughes and neither Baker Hughes
     nor any such Subsidiary has forfeited or otherwise relinquished any Baker
     Hughes Intangible Property which forfeiture would result in a Material
     Adverse Effect. To the knowledge of Baker Hughes, the use of the Baker
     Hughes Intangible Property by Baker Hughes or its Subsidiaries does not, in
     any material respect, conflict with, infringe upon, violate or interfere
     with or constitute an appropriation of any right, title, interest or
     goodwill, including, without limitation, any intellectual property right,
     trademark, trade name, patent, service mark, brand mark, brand name,
     computer program, database, industrial design, copyright or any pending
     application therefor of any other person and there have been no claims made
     and neither Baker Hughes nor any of its Subsidiaries has received any
     notice of any claim or otherwise knows that any of the Baker Hughes
     Intangible Property is invalid or conflicts with the asserted rights of any
     other person or has not been used or enforced or has been failed to be used
     or enforced in a manner that would result in the abandonment, cancellation
     or unenforceability of any of the Baker Hughes Intangible Property, except
     for any such conflict, infringement, violation, interference, claim,
     invalidity, abandonment, cancellation or unenforceability that would not
     reasonably be expected to have a Material Adverse Effect.
 
          (o) Environmental Matters.
 
             (i) Except as disclosed on Schedule 3.2(o), the operations of Baker
        Hughes and its Subsidiaries have been and, as of the Closing Date, will
        be, in compliance with all Environmental Laws, except where the failure
        to so comply would not reasonably be expected to have a Material Adverse
        Effect on Baker Hughes;
 
             (ii) Except as disclosed on Schedule 3.2(o), Baker Hughes and its
        Subsidiaries have obtained and will, as of the Closing Date, maintain
        all permits required under applicable Environmental Laws for the
        continued operations of their respective businesses, except such permits
        the lack of which would not reasonably be expected to lead to a Material
        Adverse Effect on Baker Hughes;
 
             (iii) Except as disclosed on Schedule 3.2(o), Baker Hughes and its
        Subsidiaries are not subject to any outstanding written orders or
        material contracts with any Governmental Entity or other person
        respecting (A) Environmental Laws, (B) Remedial Action or (C) any
        Release or
 
                                       21
<PAGE>   28
 
        threatened Release of a Hazardous Material, except such orders or
        contracts the compliance with which would not reasonably be expected to
        have a Material Adverse Effect;
 
             (iv) Except as disclosed on Schedule 3.2(o), Baker Hughes and its
        Subsidiaries have not received any written communication alleging, with
        respect to any such party, the violation of or liability under any
        Environmental Law, which violation or liability would reasonably be
        expected to have a Material Adverse Effect on Baker Hughes;
 
             (v) Except as disclosed on Schedule 3.2(o), neither Baker Hughes
        nor any of its Subsidiaries has any contingent liability in connection
        with the Release of any Hazardous Material into the indoor or outdoor
        environment (whether on-site or off-site) that would reasonably be
        expected to lead to a Material Adverse Effect on Baker Hughes;
 
             (vi) Except as disclosed on Schedule 3.2(o), none of the operations
        of Baker Hughes or its Subsidiaries involving the generation,
        transportation, treatment, storage or disposal of hazardous waste, as
        defined and regulated under 40 C.F.R. Parts 260-270 (in effect as of the
        date of this Agreement) or any state equivalent are in compliance with
        applicable Environmental Laws, except where the failure to so comply
        would not reasonably be expected to have a Material Adverse Effect on
        Baker Hughes; and
 
             (vii) Except as disclosed on Schedule 3.2(o), to the knowledge of
        Baker Hughes as of the date hereof, there is not now on or in any
        property of Baker Hughes or its Subsidiaries any of the following: (A)
        any underground storage tanks or surface impoundments, (B) any asbestos-
        containing materials, or (C) any polychlorinated biphenyls, which ((A),
        (B), or (C) preceding) could reasonably be expected to have a Material
        Adverse Effect on Baker Hughes.
 
          (p) No Vote Required. No vote of the holders of any class or series of
     Baker Hughes capital stock is necessary to approve the issuance of Baker
     Hughes Common Stock pursuant to this Agreement and the transactions
     contemplated hereby.
 
          (q) Beneficial Ownership of Drilex Common Stock. As of the date
     hereof, assuming the accuracy of the representation set forth in Section
     3.1(b), neither Baker Hughes nor its Subsidiaries "beneficially owns" (as
     defined in Rule 13d-3 under the Exchange Act) any of the outstanding Drilex
     Common Stock.
 
          (r) Brokers. No broker, investment banker or other person is entitled
     to any broker's, finder's or other similar fee or commission in connection
     with the transactions contemplated by this Agreement based upon
     arrangements made by or on behalf of Baker Hughes.
 
          (s) Interim Operations of Sub. Sub was formed by Baker Hughes solely
     for the purpose of engaging in the transactions contemplated hereby, has
     engaged in no other business or activities, has incurred no other
     obligations or liabilities, has no other assets and has conducted its
     operations only as contemplated hereby. All of the outstanding capital
     stock of Sub is owned directly by Baker Hughes.
 
          (t) Tax Matters. As of the date hereof, to the knowledge of Baker
     Hughes, the representations in the numbered paragraphs set forth in the
     form of Certificate of Purchaser included as Schedule 3.2(t) are true and
     correct in all material respects, assuming for purposes of this
     representation and warranty that the Merger referred to in such form had
     been consummated on the date hereof.
 
                                       22
<PAGE>   29
 
                                   ARTICLE IV
 
              COVENANTS RELATING TO CONDUCT OF BUSINESS OF DRILEX
 
     4.1  Conduct of Business by Drilex Pending the Merger. During the period
from the date of this Agreement and continuing until the Effective Time, Drilex
agrees as to itself and its Subsidiaries that (except as expressly contemplated
or permitted by this Agreement, or to the extent that Baker Hughes shall
otherwise consent in writing):
 
          (a) Ordinary Course. Except as provided on Schedule 4.1(a), each of
     Drilex and its Subsidiaries shall carry on its businesses in the usual,
     regular and ordinary course in substantially the same manner as heretofore
     conducted and shall use all reasonable efforts to preserve intact its
     present business organizations, keep available the services of its current
     officers and employees, and endeavor to preserve its relationships with
     customers, suppliers and others having business dealings with it to the end
     that its goodwill and ongoing business shall not be impaired in any
     material respect at the Effective Time.
 
          (b) Dividends; Changes in Stock. Except as provided on Schedule
     4.1(b), Drilex shall not and it shall not permit any of its Subsidiaries
     to: (i) declare or pay any dividends on or make other distributions in
     respect of any of its capital stock or partnership interests, except for
     the declaration and payment of dividends from a Subsidiary of Drilex to
     Drilex or another Subsidiary of Drilex and except for cash dividends or
     distributions paid on or with respect to the capital stock or partnership
     interests of a Subsidiary of Drilex; (ii) split, combine or reclassify any
     of its capital stock or issue or authorize or propose the issuance of any
     other securities in respect of, in lieu of or in substitution for shares of
     Drilex capital stock; or (iii) repurchase, redeem or otherwise acquire, or
     permit any of its Subsidiaries to purchase, redeem or otherwise acquire,
     any shares of its capital stock, except as required by the terms of its
     securities outstanding on the date hereof or as contemplated by any
     existing employee benefit plan.
 
          (c) Issuance of Securities. Except as provided on Schedule 4.1(c),
     Drilex shall not and it shall not permit any of its Subsidiaries to, issue,
     deliver or sell, or authorize or propose to issue, deliver or sell, any
     shares of its capital stock of any class, any Voting Debt or any securities
     convertible into, or any rights, warrants or options to acquire, any such
     shares, Voting Debt or convertible securities, other than: (i) the issuance
     of Drilex Common Stock upon the exercise of stock options granted under the
     Drilex Stock Plan that are outstanding on the date hereof, or in
     satisfaction of stock grants or stock based awards made prior to the date
     hereof pursuant to the Drilex Stock Plan or upon exercise of the Drilex
     Warrants; and (ii) issuances by a wholly owned Subsidiary of its capital
     stock to its parent.
 
          (d) Governing Documents. Except as contemplated hereby or in
     connection herewith, Drilex shall not amend or propose to amend its
     Restated Certificate of Incorporation or Bylaws.
 
          (e) No Acquisitions. Other than acquisitions listed on Schedule
     4.1(e), Drilex shall not and it shall not permit any of its Subsidiaries
     to, acquire or agree to acquire by merging or consolidating with, or by
     purchasing a substantial equity interest in or a substantial portion of the
     assets of, or by any other manner, any business or any corporation,
     partnership, association or other business organization or division
     thereof.
 
          (f) No Dispositions. Other than: (i) dispositions or proposed
     dispositions listed on Schedule 4.1(f), (ii) dispositions in the ordinary
     course of business consistent with past practice that are not material,
     individually or in the aggregate, to Drilex and its Subsidiaries taken as a
     whole, and (iii) product sales in the ordinary course of business
     consistent with past practice, Drilex shall not and it shall not permit any
     of its Subsidiaries to sell, lease, encumber or otherwise dispose of, or
     agree to sell, lease (whether such lease is an operating or capital lease),
     encumber or otherwise dispose of, any of its assets.
 
          (g) No Dissolution, Etc. Except as otherwise permitted or contemplated
     by this Agreement, Drilex shall not authorize, recommend, propose or
     announce an intention to adopt a plan of complete or partial liquidation or
     dissolution of Drilex or any of its Significant Subsidiaries.
 
                                       23
<PAGE>   30
 
          (h) Certain Employee Matters. Except as set forth on Schedule 4.1(h)
     or pursuant to Section 5.9, Drilex shall not and it shall not permit any of
     its Subsidiaries to: (i) grant any increases in the compensation of any of
     its directors, officers or employees, except increases to employees who are
     not officers or directors in the ordinary course of business and in
     accordance with past practice; (ii) pay or agree to pay any pension,
     retirement allowance or other employee benefit not required or contemplated
     by any of the existing Drilex Employee Benefit Plans or Drilex Pension
     Plans as in effect on the date hereof to any director, officer or employee,
     whether past or present; (iii) enter into any new, or amend any existing,
     employment or severance or termination agreement with any director, officer
     or key employee; (iv) become obligated under any new Drilex Employee
     Benefit Plan or Drilex Pension Plan, which was not in existence or approved
     by the Board of Directors of Drilex prior to or on the date hereof, or
     amend any such plan or arrangement in existence on the date hereof if such
     amendment would have the effect of materially enhancing any benefits
     thereunder; or (v) terminate the employment of any executive or employee of
     Drilex without cause.
 
          (i) Indebtedness; Leases; Capital Expenditures. Except as set forth on
     Schedule 4.1(i), Drilex shall not, nor shall Drilex permit any of its
     Subsidiaries to, (i) incur any indebtedness for borrowed money (except for
     working capital under Drilex's existing credit facilities, and refinancings
     of existing debt that permit prepayment of such debt without penalty (other
     than LIBOR breakage costs)) or guarantee any such indebtedness or issue or
     sell any debt securities or warrants or rights to acquire any debt
     securities of such party or any of its Subsidiaries or guarantee any debt
     securities of others, (ii) except in the ordinary course of business, enter
     into any lease (whether such lease is an operating or capital lease) or
     create any mortgages, liens, security interests or other encumbrances on
     the property of Drilex or any of its Subsidiaries in connection with any
     indebtedness thereof, or (iii) commit to aggregate capital expenditures in
     excess of $500,000 outside the capital budget, as amended and approved by
     Drilex prior to the date hereof and disclosed to Baker Hughes on Schedule
     4.1(i).
 
     4.2  No Solicitation.
 
          (a) From and after the date hereof, Drilex will not, and will not
     authorize or permit any of its officers, directors, employees, agents,
     affiliates or other representatives or those of any of its Subsidiaries
     (collectively, "Drilex Representatives") to, directly or indirectly,
     solicit or encourage (including by way of providing information) any
     prospective acquiror or the invitation or submission of any inquiries,
     proposals or offers or any other efforts or attempts that constitute, or
     may reasonably be expected to lead to, an Acquisition Proposal (as defined
     herein) from any person or engage in any discussions or negotiations with
     respect thereto or otherwise cooperate with or assist or participate in or
     facilitate any such proposal; provided, however, that, notwithstanding any
     other provision of this Agreement, (i) Drilex's Board of Directors may take
     and disclose to Drilex's stockholders a position contemplated by Rule
     14e-2(a) promulgated under the Exchange Act and (ii) following receipt from
     a third party (without any solicitation, initiation, encouragement,
     discussion or negotiation, directly or indirectly, by or with Drilex or any
     Drilex Representatives) of a bona fide Acquisition Proposal that is
     financially superior to the Merger and reasonably capable of being financed
     (as determined in each case in good faith by Drilex's Board of Directors
     after consultation with Drilex's financial advisors), (x) Drilex may engage
     in discussions or negotiations with such third party and may furnish such
     third party information concerning Drilex, and its business, properties and
     assets if such third party executes a confidentiality agreement in
     reasonably customary form and (y) the Board of Directors of Drilex may
     withdraw, modify or not make its recommendation referred to in Section 5.5
     or terminate this Agreement in accordance with Section 7.1(f), but in each
     case referred to in the foregoing clauses (i) and (ii) only to the extent
     that the Board of Directors of Drilex shall conclude in good faith after
     consultation with Drilex's outside counsel that such action is necessary in
     order for the Board of Directors of Drilex to act in a manner that is
     consistent with its fiduciary obligations under applicable law
     notwithstanding any concessions that may be offered by Baker Hughes.
 
          (b) Drilex shall immediately cease and cause to be terminated any
     existing solicitation, initiation, encouragement, activity, discussion or
     negotiation with any parties conducted heretofore by Drilex or any Drilex
     Representatives with respect to any Acquisition Proposal existing on the
     date hereof.
 
                                       24
<PAGE>   31
 
          (c) Prior to taking any action referred to in Section 4.2(a), if
     Drilex intends to participate in any such discussions or negotiations or
     provide any such information to any such third party, Drilex shall give
     prior notice to Baker Hughes of such action. Drilex will promptly notify
     Baker Hughes of any such requests for such information or the receipt of
     any Acquisition Proposal, including the identity of the person or group
     engaging in such discussions or negotiations, requesting such information
     or making such Acquisition Proposal, and the material terms and conditions
     of any Acquisition Proposal.
 
          (d) Nothing in this Section 4.2 shall permit Drilex to enter into any
     agreement with respect to an Acquisition Proposal during the term of this
     Agreement (it being agreed that during the term of this Agreement, Drilex
     shall not enter into any agreement with any person that provides for, or in
     any way facilitates, an Acquisition Proposal other than a confidentiality
     agreement in the form referred to above).
 
          (e) As used in this Agreement, "Acquisition Proposal" shall mean any
     proposal or offer, other than a proposal or offer by Baker Hughes or any of
     its affiliates, for, or that could be reasonably expected to lead to, a
     tender or exchange offer, a merger, consolidation or other business
     combination involving Drilex or any Significant Subsidiary of Drilex or any
     proposal to acquire in any manner a substantial equity interest in, or any
     substantial portion of the assets of, Drilex or any of its Significant
     Subsidiaries.
 
     4.3  Conduct of Business by Baker Hughes Pending the Merger. During the
period from the date of this Agreement and continuing until the Effective Time,
Baker Hughes agrees as to itself and its Subsidiaries that (except as expressly
contemplated or permitted by this Agreement, or to the extent that Drilex shall
otherwise consent in writing):
 
          (a) Governing Documents. Baker Hughes shall not amend its Restated
     Certificate of Incorporation or Bylaws in any way that materially and
     adversely affects the rights of holders of Baker Hughes Common Stock.
 
          (b) Baker Hughes Common Stock. (i) During the period beginning five
     business days prior to the Pricing Period and ending at the Effective Time,
     Baker Hughes shall not (and shall cause its Subsidiaries not to) issue or
     sell any shares of Baker Hughes's capital stock or the capital stock of any
     of its Subsidiaries (or securities convertible into or exchangeable for
     capital stock) for less than the fair market value thereof, except for
     issuances pursuant to employee benefit plans or pursuant to outstanding
     options, warrants or convertible securities in accordance with their terms,
     in each case as in existence on the date hereof, and shall not issue to
     holders of Baker Hughes's capital stock any rights to purchase any shares
     of Baker Hughes's capital stock for less than the fair market value thereof
     if the ex-dividend date for such distribution would be during the period
     beginning five business days prior to the Pricing Period and ending at the
     Effective Time; (ii) Baker Hughes shall not (and shall cause its
     Subsidiaries not to) engage in any substantial repurchase at a material
     premium, recapitalization, restructuring or reorganization with respect to
     the Baker Hughes Common Stock; and (iii) during the period beginning five
     business days prior to the mailing of the Proxy Statement and ending at the
     Effective Time, Baker Hughes shall not (and shall cause its Subsidiaries
     not to) redeem, repurchase or otherwise acquire any shares of Baker Hughes
     Common Stock (other than pursuant to existing employee benefit plans).
 
          (c) Dividends. Baker Hughes shall not declare, set aside or pay any
     dividend or make any other distribution or payment with respect to any
     shares of Baker Hughes Common Stock, or make any commitment for any such
     action, except regular quarterly cash dividends in amounts consistent with
     past practice.
 
          (d) Other Action. Baker Hughes shall not take any action, including
     agreeing to or consummating any acquisition or business combination, that
     is likely to delay materially or adversely affect the ability of any of the
     parties hereto to obtain any consent, authorization, order or approval of
     any governmental commission, board or other regulatory body or the
     expiration of any applicable waiting period required to consummate the
     transactions contemplated by this Agreement; and, subject to applicable
     law, Baker Hughes agrees to use its commercial reasonable efforts without
     the incurrence of unreasonable expense (consistent with the other terms of
     this Agreement) to assist Drilex, at Drilex's request, so that Drilex may
     keep available the services of its current officers and employees and
     preserve its relationships with
 
                                       25
<PAGE>   32
 
     customers, suppliers and others having business dealings with Drilex to the
     end that Drilex's goodwill and ongoing business shall not be impaired in
     any material respect.
 
                                   ARTICLE V
 
                             ADDITIONAL AGREEMENTS
 
     5.1  Preparation of S-4 and the Proxy Statement. Baker Hughes and Drilex
shall promptly prepare and file with the SEC the Proxy Statement and Baker
Hughes shall prepare and file with the SEC the S-4, in which the Proxy Statement
will be included as a prospectus. Each of Baker Hughes and Drilex shall use its
best efforts to have the S-4 declared effective under the Securities Act as
promptly as practicable after such filing. Each of Drilex and Baker Hughes shall
use its best efforts to cause the Proxy Statement to be mailed to stockholders
of Drilex at the earliest practicable date. Baker Hughes shall use its best
efforts to obtain all necessary state securities laws or "blue sky" permits,
approvals and registrations in connection with the issuance of Baker Hughes
Common Stock in the Merger and upon the exercise of Drilex Stock Options (as
defined in Section 5.10) and Drilex shall furnish all information concerning
Drilex and the holders of Drilex Common Stock as may be reasonably requested in
connection with obtaining such permits, approvals and registrations.
 
     5.2  Letter of Drilex's Accountants. Drilex shall use its best efforts to
cause to be delivered to Baker Hughes a letter of Deloitte & Touche LLP,
Drilex's independent public accountants, dated a date within two business days
before the date on which the S-4 shall become effective and addressed to Baker
Hughes and Drilex, in form and substance reasonably satisfactory to Baker Hughes
and customary in scope and substance for letters delivered by independent public
accountants in connection with registration statements similar to the S-4.
 
     5.3  Letter of Baker Hughes's Accountants. Baker Hughes shall use its best
efforts to cause to be delivered to Drilex a letter of Deloitte & Touche LLP,
Baker Hughes's independent public accountants, dated a date within two business
days before the date on which the S-4 shall become effective and addressed to
Drilex and Baker Hughes, in form and substance reasonably satisfactory to Drilex
and customary in scope and substance for letters delivered by independent public
accountants in connection with registration statements similar to the S-4.
 
     5.4  Access to Information. Upon reasonable notice, Drilex and Baker Hughes
shall each (and shall cause each of their respective Subsidiaries to) afford to
the officers, employees, accountants, counsel and other representatives of the
other, access, during normal business hours during the period prior to the
Effective Time, to all its properties, books, contracts, commitments and records
(including reasonable environmental testing) and, during such period, each of
Drilex and Baker Hughes shall (and shall cause each of their respective
Subsidiaries to) furnish promptly to the other (a) a copy of each report,
schedule, registration statement and other document filed or received by it
during such period pursuant to SEC requirements and (b) all other information
concerning its business, properties and personnel as such other party may
reasonably request. Each of Drilex and Baker Hughes agrees that it will not, and
will cause its respective representatives not to, use any information obtained
pursuant to this Section 5.4 for any purpose unrelated to the consummation of
the transactions contemplated by this Agreement. The Confidentiality Agreement
between Baker Hughes and Drilex (the "Confidentiality Agreement") shall apply
with respect to information furnished thereunder or hereunder and any other
activities contemplated thereby.
 
     5.5  Drilex Stockholders Meeting. Drilex shall call a meeting of its
stockholders to be held as promptly as practicable after the date hereof for the
purpose of voting upon this Agreement and the Merger. Subject only to the
proviso of the first sentence of Section 4.2, Drilex will, through its Board of
Directors, recommend to its stockholders approval of such matters and not
rescind such recommendation and shall use its best efforts to obtain approval
and adoption of this Agreement and the Merger by its stockholders. Drilex shall
use all reasonable efforts to hold such meeting as soon as practicable after the
date upon which the S-4 becomes effective.
 
                                       26
<PAGE>   33
 
     5.6  Filings; Other Action. Subject to the terms and conditions herein
provided, Baker Hughes and Drilex shall: (a) promptly make their respective
filings and thereafter make any other required submissions under the HSR Act
with respect to the Merger; (b) use their best efforts to cooperate with one
another in (i) determining which filings are required to be made prior to the
Effective Time with, and which consents, approvals, permits or authorizations
are required to be obtained prior to the Effective Time from, governmental or
regulatory authorities of the United States, the several states and foreign
jurisdictions in connection with the execution and delivery of this Agreement
and the consummation of the Merger and the transactions contemplated hereby and
(ii) timely making all such filings and timely seeking all such consents,
approvals, permits or authorizations; (c) furnish the others with copies of all
correspondence, filings and communications (and memoranda setting forth the
substance thereof) between them and their affiliates and their respective
representatives, on the one hand, and any governmental or regulatory authority
or members or their respective staffs, on the other hand, with respect to this
Agreement and the transactions contemplated hereby; (d) furnish the others with
such necessary information and reasonable assistance as such other parties and
their respective affiliates may reasonably request in connection with their
preparation of necessary filings, registrations or submissions of information to
any governmental or regulatory authorities, including without limitation any
filings necessary under the provisions of the HSR Act; and (e) use their
commercially reasonable efforts to take, or cause to be taken, all other action
and do, or cause to be done, all other things necessary, proper or appropriate
to consummate and make effective the Merger and the transactions contemplated by
this Agreement including, without limitation, the resolution of objections, if
any, as may be asserted by any governmental authority with respect to the Merger
and the transactions contemplated hereby under any antitrust or trade or
regulatory laws or regulations of any governmental authority; provided that
Baker Hughes and Drilex shall not be required to take any action that could have
any adverse effect on the business, operations, prospects, assets, condition
(financial or otherwise) or results of operations of Baker Hughes or Drilex
(including any Subsidiaries thereof).
 
     5.7  Agreements of Others. Prior to the Effective Time, Drilex shall cause
to be prepared and delivered to Baker Hughes a list identifying all persons who,
at the time of the Stockholder Meeting, may be deemed to be "affiliates" of
Drilex as that term is used in paragraphs (c) and (d) of Rule 145 under the
Securities Act (the "Affiliates"). Drilex shall use its best efforts to cause
each person who is identified as an Affiliate in such list to deliver to Baker
Hughes, at or prior to the Effective Time, a written agreement, in the form to
be approved by the parties hereto, that such Affiliate will not sell, pledge,
transfer or otherwise dispose of any shares of Baker Hughes Common Stock issued
to such Affiliate pursuant to the Merger, except pursuant to an effective
registration statement or in compliance with Rule 145 or an exemption from the
registration requirements of the Securities Act. Drilex shall use its best
efforts to cause each person who is identified as an Affiliate in such list to
sign on or prior to the thirtieth day prior to the Effective Time, a written
agreement, in the form to be approved by Baker Hughes and Drilex, that such
party will not sell or in any other way reduce such party's risk relative to any
shares of Baker Hughes Common Stock received in the Merger (within the meaning
of Section 201.01 of the SEC's Financial Reporting Release No. 1), until such
time as financial results (including combined sales and net income) covering at
least 30 days of post-merger operations have been published, except as permitted
by Staff Accounting Bulletin No. 76 (or any successor thereto) issued by the
SEC.
 
     5.8  Authorization for Shares and Stock Exchange Listing. Prior to the
Effective Time, Baker Hughes shall have taken all action necessary to permit it
to issue the number of shares of Baker Hughes Common Stock required to be issued
pursuant to Section 2.1. Baker Hughes shall use all reasonable efforts to cause
the shares of Baker Hughes Common Stock to be issued in the Merger and the
shares of Baker Hughes Common Stock to be reserved for issuance upon exercise of
Drilex Stock Options and Drilex Warrants and issuances under the Drilex Stock
Plan to be approved for listing on the NYSE, subject to official notice of
issuance, prior to the Closing Date.
 
     5.9  Employee Matters. Baker Hughes and Drilex agree to the matters
described on Schedule 5.9. Baker Hughes and Drilex agree that all employees of
Drilex immediately prior to the Effective Time shall be employed by the
Surviving Corporation immediately after the Effective Time, it being understood
that Baker Hughes and the Surviving Corporation shall not have any obligations
to continue employing such employees
 
                                       27
<PAGE>   34
 
for any length of time thereafter. Prior to the Effective Time, Baker Hughes
agrees to make no representations or promises, oral or written, to employees of
Drilex concerning compensation payable after the Closing Date without the prior
consent of Drilex. Baker Hughes and Drilex further agree that the Drilex
Employee Benefit Plans and Drilex Pension Plans in effect at the date of this
Agreement shall remain in effect until otherwise determined by the Surviving
Corporation or Baker Hughes. To the extent such Drilex Employee Benefit Plans
and Drilex Pension Plans are not continued, Baker Hughes will provide for a
period of one year after the Effective Time aggregate compensation (including
benefits) that is not less favorable, in the aggregate, to such employees as
that applicable to similarly situated employees of Baker Hughes. Service with
Drilex and its Subsidiaries shall, to the extent permitted by law, (i)
constitute service for all purposes under the Baker Hughes Employee Benefit
Plans, provided that such service does not result in a duplication of benefits
paid or payable under the Baker Hughes Employee Benefit Plans, and (ii)
constitute service for participation and vesting purposes under the Baker Hughes
Pension Plans.
 
     5.10  Stock Options. (a) At the Effective Time, each outstanding option to
purchase Drilex Common Stock that has been granted pursuant to the Drilex Stock
Plan ("Drilex Stock Option") shall be treated as set forth in this Section 5.10.
Drilex shall not grant any stock appreciation rights or limited stock
appreciation rights and shall not permit cash payments to holders of Drilex
Stock Options in lieu of the treatment thereof as provided in this Section 5.10.
 
     (b) The portion, if any, of each Drilex Stock Option that is exercisable as
of the Effective Time in accordance with the terms thereof shall be assumed by
Baker Hughes. As so assumed, such option shall be deemed to constitute an option
to acquire, on the same terms and conditions as were applicable under such
Drilex Stock Option, a number of shares of Baker Hughes Common Stock equal to
the number of shares of Drilex Common Stock purchasable pursuant to such
exercisable portion of such Drilex Stock Option multiplied by the Exchange
Ratio, at a price per share equal to the per-share exercise price for the shares
of Drilex Common Stock purchasable pursuant to such Drilex Stock Option divided
by the Exchange Ratio; provided, however, that in the case of any option to
which Section 421 of the Code applies by reason of its qualification under any
of sections 422-424 of the Code, the option price, the number of shares
purchasable pursuant to such option and the terms and conditions of exercise of
such option shall be determined in order to comply with Section 424(a) of the
Code; and provided further, that the number of shares of Baker Hughes Common
Stock that may be purchased upon exercise of such Drilex Stock Option shall not
include any fractional share and, upon exercise of such Drilex Stock Option, a
cash payment shall be made for any fractional share based upon the closing price
of a share of Baker Hughes Common Stock on the NYSE on the last trading day of
the calendar month immediately preceding the date of exercise. After the
Effective Time, except as provided above in this Section 5.10(b), each assumed
option shall be exercisable upon the same terms and conditions as were
applicable to the related Drilex Stock Option immediately prior to the Effective
Time.
 
     (c) Drilex shall take all reasonable action as may be required such that
the portion, if any, of each Drilex Stock Option that is not exercisable as of
the Effective Time (an "Unexercisable Option") shall be canceled in exchange for
the number of shares of Baker Hughes Common Stock, decreased to the nearest
whole share, having an aggregate market value at the Effective Time (based on
the Average Closing Price) equal to the number of shares of Drilex Common Stock
subject to such Unexercisable Option multiplied by the excess, if any, of the
Drilex Value over the per-share exercise price thereof. To the extent the terms
of an Unexercisable Option allow for withholding to satisfy tax obligations,
such rights shall apply to the consideration provided for by this Section
5.10(c).
 
     (d) Baker Hughes shall take all corporate action necessary to reserve for
issuance a sufficient number of shares of Baker Hughes Common Stock for delivery
upon exercise of the Drilex Stock Options assumed in accordance with this
Section 5.10. As soon as practicable after the Effective Time, Baker Hughes
shall file with the SEC a registration statement on Form S-8 (or any successor
form) or another appropriate form with respect to the shares of Baker Hughes
Common Stock subject to the Drilex Stock Options and shall use its best efforts
to maintain the effectiveness of such registration statement or registration
statements (and maintain the current status of the prospectus or prospectuses
contained therein) for so long as Drilex Stock Options remain outstanding.
 
                                       28
<PAGE>   35
 
     5.11  Indemnification; Directors' and Officers' Insurance. (a) Drilex
shall, and from and after the Effective Time, Baker Hughes and the Surviving
Corporation shall, indemnify, defend and hold harmless each person who is now,
or has been at any time prior to the date hereof or who becomes prior to the
Effective Time, an officer or director of Drilex or any of its Subsidiaries or
an employee of Drilex or any of its Subsidiaries who acts as a fiduciary under
any Drilex Employee Benefit Plans or Drilex Pension Plans (the "Indemnified
Parties") against all losses, claims, damages, costs, expenses (including
attorneys' fees), liabilities or judgments or amounts that are paid in
settlement with the approval of the indemnifying party (which approval shall not
be unreasonably withheld) of or in connection with any threatened or actual
claim, action, suit, proceeding or investigation based in whole or in part on or
arising in whole or in part out of the fact that such person is or was a
director, officer, or such employee of Drilex or any Subsidiary whether
pertaining to any matter existing or occurring at or prior to the Effective Time
and whether asserted or claimed prior to, or at or after, the Effective Time
("Indemnified Liabilities"), including all Indemnified Liabilities based in
whole or in part on, or arising in whole or in part out of, or pertaining to
this Agreement or the transactions contemplated hereby, in each case to the full
extent permitted under applicable Delaware law (and Baker Hughes and the
Surviving Corporation, as the case may be, will pay expenses in advance of the
final disposition of any such action or proceeding to each Indemnified Party to
the full extent permitted by law). Without limiting the foregoing, in the event
any such claim, action, suit, proceeding or investigation is brought against any
Indemnified Parties (whether arising before or after the Effective Time), (i)
the Indemnified Parties may retain counsel satisfactory to them and Drilex (or
them and Baker Hughes and the Surviving Corporation after the Effective Time)
and Drilex (or after the Effective Time, Baker Hughes and the Surviving
Corporation) shall pay all fees and expenses of such counsel for the Indemnified
Parties promptly as statements therefor are received; and (ii) Drilex (or after
the Effective Time, Baker Hughes and the Surviving Corporation) will use all
reasonable efforts to assist in the vigorous defense of any such matter,
provided that neither Drilex, Baker Hughes nor the Surviving Corporation shall
be liable for any settlement effected without its written consent, which
consent, however, shall not be unreasonably withheld. Any Indemnified Party
wishing to claim indemnification under this Section 5.11, upon learning of any
such claim, action, suit, proceeding or investigation, shall notify Drilex (or
after the Effective Time, Baker Hughes and the Surviving Corporation), but the
failure so to notify shall not relieve a party from any liability that it may
have under this Section 5.11, except to the extent such failure materially
prejudices such party. The Indemnified Parties as a group may retain only one
law firm to represent them with respect to each such matter unless there is,
under applicable standards of professional conduct, a conflict on any
significant issue between the positions of any two or more Indemnified Parties.
Drilex, Baker Hughes and Sub agree that all rights to indemnification, including
provisions relating to advances of expenses incurred in defense of any action or
suit, existing in favor of the Indemnified Parties (including in the Restated
Certificate of Incorporation or Bylaws or in the indemnification agreements
previously provided to Baker Hughes) with respect to matters occurring through
the Effective Time, shall survive the Merger and shall continue in full force
and effect for a period of six years from the Effective Time; provided, however,
that all rights to indemnification in respect of any Indemnified Liabilities
asserted or made within such period shall continue until the disposition of such
Indemnified Liabilities.
 
     (b) For a period of six years after the Effective Time, Baker Hughes shall
cause to be maintained in effect the current policies of directors' and
officers' liability insurance maintained by Drilex and its Subsidiaries
(provided that Baker Hughes may substitute therefor policies of at least the
same coverage and amounts containing terms and conditions that are no less
advantageous in any material respect to the Indemnified Parties) with respect to
matters arising before the Effective Time, provided that Baker Hughes shall not
be required to pay an annual premium for such insurance in excess of two times
the current annual premium disclosed by Drilex to Baker Hughes prior to the date
hereof, but in such case shall purchase as much coverage as possible for such
amount.
 
     5.12  Drilex Credit Agreement. At or prior to the Closing, Baker Hughes
shall refinance (or arrange for the continuation of) or repay all Drilex's debt
under its bank credit facility with Texas Commerce Bank National Association and
the other lenders thereunder (the "Bank Credit Facility"). Baker Hughes
acknowledges that the Merger may constitute an "Event of Default" as a result of
a change of control under the Bank Credit Facility. Notwithstanding the
foregoing, Baker Hughes acknowledges that the receipt of the
 
                                       29
<PAGE>   36
 
consent or waiver of the lenders under the Bank Credit Facility shall not be a
condition to Baker Hughes's obligation to effect the Merger.
 
     5.13  Agreement to Defend. In the event any claim, action, suit,
investigation or other proceeding by any governmental body or other person or
other legal or administrative proceeding is commenced that questions the
validity or legality of the transactions contemplated hereby or seeks damages in
connection therewith, the parties hereto agree to cooperate and use their
reasonable efforts to defend against and respond thereto.
 
     5.14  Public Announcements. Baker Hughes and Sub, on the one hand, and
Drilex, on the other hand, will consult with each other before issuing any press
release or otherwise making any public statements with respect to the
transactions contemplated by this Agreement, and shall not issue any such press
release or make any such public statement prior to such consultation, except as
may be required by applicable law or by obligations pursuant to any listing
agreement with any national securities exchange or transaction reporting system.
 
     5.15  Other Actions. Except as contemplated by this Agreement, neither
Baker Hughes nor Drilex shall, and shall not permit any of its Subsidiaries to,
take or agree or commit to take any action that is reasonably likely to result
in any of its respective representations or warranties hereunder being untrue in
any material respect or in any of the conditions to the Merger set forth in
Article VI not being satisfied.
 
     5.16  Advice of Changes; SEC Filings. Baker Hughes and Drilex shall confer
on a regular basis with each other, report on operational matters and promptly
advise each other orally and in writing of any change or event having, or which,
insofar as can reasonably be foreseen, could have, a Material Adverse Effect on
Baker Hughes or Drilex, as the case may be. Drilex and Baker Hughes shall
promptly provide each other (or their respective counsel) copies of all filings
made by such party with the SEC or any other state or federal Governmental
Entity in connection with this Agreement and the transactions contemplated
hereby.
 
     5.17  Reorganization. It is the intention of Baker Hughes and Drilex that
the Merger will qualify as a reorganization described in Section 368(a) of the
Code (and any comparable provisions of applicable state law). Neither Baker
Hughes nor Drilex (nor any of their respective Subsidiaries) will take or omit
to take any action (whether before, on or after the Closing Date) that would
cause the Merger not to be so treated. The parties will characterize the Merger
as such a reorganization for purposes of all Returns and other filings.
 
     5.18  Accounting Matters. During the period from the date of this Agreement
through the Effective Time, unless the parties shall otherwise agree in writing,
neither Drilex nor any Subsidiary of Drilex shall knowingly take or fail to take
any reasonable action requested by Baker Hughes which action or failure to act
would jeopardize the treatment of Sub's combination with Drilex as a pooling of
interests for accounting purposes; provided, however, that pooling shall not be
a condition to Closing.
 
                                   ARTICLE VI
 
                              CONDITIONS PRECEDENT
 
     6.1  Conditions to Each Party's Obligation to Effect the Merger. The
respective obligation of each party to effect the Merger shall be subject to the
satisfaction prior to the Closing Date of the following conditions:
 
          (a) Drilex Stockholder Approval. This Agreement and the Merger shall
     have been approved and adopted by the affirmative vote of the holders of a
     majority of the outstanding shares of Drilex Common Stock entitled to vote
     thereon.
 
          (b) NYSE Listing. The shares of Baker Hughes Common Stock issuable to
     Drilex stockholders pursuant to this Agreement and such other shares of
     Baker Hughes Common Stock required to be reserved for issuance in
     connection with the Merger shall have been authorized for listing on the
     NYSE upon official notice of issuance.
 
          (c) Other Approvals. The waiting period applicable to the consummation
     of the Merger under the HSR Act shall have expired or been terminated and
     all filings required to be made prior to the Effective
 
                                       30
<PAGE>   37
 
     Time with, and all consents, approvals, permits and authorizations required
     to be obtained prior to the Effective Time from any Governmental Entity in
     connection with the execution and delivery of this Agreement and the
     consummation of the transactions contemplated hereby by Drilex, Baker
     Hughes and Sub shall have been made or obtained (as the case may be),
     except where the failure to obtain such consents, approvals, permits, and
     authorizations would not be reasonably likely to result in a Material
     Adverse Effect on Baker Hughes or Drilex (assuming the Merger has taken
     place) or to materially adversely affect the consummation of the Merger,
     and no such consent, approval, permit or authorization shall impose terms
     or conditions that would have, or would be reasonably likely to have, a
     Material Adverse Effect on Baker Hughes or Drilex (assuming the Merger has
     taken place). Unless otherwise agreed to by Baker Hughes, no such consent,
     approval, permit or authorization shall then be subject to appeal.
 
          (d) S-4. The S-4 shall have become effective under the Securities Act
     and shall not be the subject of any stop order or proceedings seeking a
     stop order.
 
          (e) No Injunctions or Restraints. No temporary restraining order,
     preliminary or permanent injunction or other order issued by any court of
     competent jurisdiction or other legal restraint or prohibition (an
     "Injunction") preventing the consummation of the Merger shall be in effect;
     provided, however, that prior to invoking this condition, each party shall
     have complied fully with its obligations under Section 5.6 hereof.
 
     6.2  Conditions of Obligations of Baker Hughes and Sub. The obligations of
Baker Hughes and Sub to effect the Merger are subject to the satisfaction of the
following conditions, any or all of which may be waived in whole or in part by
Baker Hughes and Sub:
 
          (a) Representations and Warranties. Each of the representations and
     warranties of Drilex set forth in this Agreement shall be true and correct
     in all material respects as of the date of this Agreement and (except to
     the extent such representations and warranties speak as of an earlier date)
     as of the Closing Date as though made on and as of the Closing Date, except
     where the failure to be so true and correct (without giving effect to the
     individual materiality qualifications and thresholds otherwise contained in
     Section 3.1 hereof) could not reasonably be expected to have a Material
     Adverse Effect on Drilex or as otherwise contemplated by this Agreement.
 
          (b) Performance of Obligations of Drilex. Drilex shall have performed
     in all material respects all obligations required to be performed by it
     under this Agreement at or prior to the Closing Date.
 
          (c) Letters from Drilex Affiliates. Baker Hughes shall have received
     from each person named in the letter referred to in Section 5.7 an executed
     copy of an agreement as provided in Section 5.7.
 
          (d) Absence of Certain Action. No Injunction shall be in effect (i)
     imposing any limitation upon the ability of Baker Hughes or any of its
     Subsidiaries effectively to control the business or operations of Baker
     Hughes, Drilex or any of their respective Subsidiaries or (ii) prohibiting
     or imposing any limitation upon Baker Hughes's or Drilex's or any of their
     Subsidiaries' ownership or operation of all or any portion of the business
     or assets or properties of Baker Hughes or Drilex or any of their
     respective Subsidiaries or compelling Baker Hughes or Drilex or any of
     their respective Subsidiaries to divest or hold separate all or any portion
     of the business or assets or properties of Baker Hughes or Drilex or any of
     their respective Subsidiaries, or imposing any other limitation upon any of
     them in the conduct of their businesses, and no suit or proceeding by a
     governmental authority seeking such an Injunction or an Injunction
     preventing or making illegal the consummation of any of the Mergers shall
     be pending.
 
          (e) Interim Results for April. If the Test Period is the period from
     April 1, 1997 to April 30, 1997:
 
             (i) Monthly Revenue shall be not less than $5,600,000 and Monthly
        EBITDA shall be not less than $600,000, each as finally determined
        pursuant to Section 2.1(e);
 
             (ii) Drilex shall have delivered to Baker Hughes a certificate of
        the Chief Financial Officer and the Chief Executive Officer of Drilex
        (x) containing Drilex's good faith estimate of Revenue for the period
        from May 1, 1997 through a date within five business days of the Closing
        Date (and, if the
 
                                       31
<PAGE>   38
 
        Closing Date is after June 6, 1997, through May 31, 1997) and (y)
        stating that, in their good faith belief, Revenue and EBITDA for the
        period from April 1, 1997 through May 31, 1997 (calculated for purposes
        of Section 7.1(c)(v)) will exceed the thresholds applicable to Section
        7.1(c)(v);
 
             (iii) if the Drilex Value would otherwise be $16.00, either (1) the
        certificate referred to in clause (ii) shall also state that, in the
        signers' good faith belief, Revenue and EBITDA for the period from April
        1, 1997 through May 31, 1997 (calculated for purposes of Section
        2.1(e)(vii)) will exceed the thresholds applicable to Section
        2.1(e)(vii) or (2) Drilex shall have advised Baker Hughes that the Board
        of Directors of Drilex shall have elected not to delay the Closing Date
        to determine the Monthly Statements for May 1997, in which case the
        Drilex Value shall be $15.00 and the provisions of Section 2.1(e)(vii)
        shall cease to apply; and
 
             (iv) Baker Hughes shall not have notified Drilex within five
        business days of its receipt of the certificate referred to in clauses
        (ii) and (iii) that, in its good faith belief, it disagrees with any of
        Drilex's good faith beliefs contained in such certificate.
 
     If this condition is not satisfied or waived, then the Closing Date shall
     not occur until such time as the Test Period includes May 1997.
 
     6.3  Conditions of Obligations of Drilex. The obligation of Drilex to
effect the Merger is subject to the satisfaction of the following conditions,
any or all of which may be waived in whole or in part by Drilex:
 
          (a) Representations and Warranties. Each of the representations and
     warranties of Baker Hughes and Sub set forth in this Agreement shall be
     true and correct in all material respects as of the date of this Agreement
     and (except to the extent such representations and warranties speak as of
     an earlier date) as of the Closing Date as though made on and as of the
     Closing Date, except where the failure to be so true and correct (without
     giving effect to the individual materiality qualifications and thresholds
     otherwise contained in Section 3.2 hereof) could not reasonably be expected
     to have a Material Adverse Effect on Baker Hughes or as otherwise
     contemplated by this Agreement.
 
          (b) Performance of Obligations of Baker Hughes and Sub. Baker Hughes
     and Sub shall have performed in all material respects all obligations
     required to be performed by them under this Agreement at or prior to the
     Closing Date.
 
          (c) Tax Opinion. Drilex shall have received an opinion, reasonably
     satisfactory to Drilex, dated on or about the date that is two days prior
     to the date the Proxy Statement is first mailed to stockholders of Drilex,
     a copy of which will be furnished to Baker Hughes, of Vinson & Elkins
     L.L.P., counsel to Drilex, to the effect that, if the Merger is consummated
     in accordance with the terms of this Agreement, the Merger will be treated
     for federal income tax purposes as a reorganization within the meaning of
     Section 368(a) of the Code, which opinion shall not have been withdrawn or
     modified in any material respect. In rendering such opinion, such counsel
     may receive and rely upon representations of fact substantially similar to
     those referred to in the forms of certificates of Drilex and Baker Hughes
     included in Schedules 3.1(u) and 3.2(t), respectively.
 
                                  ARTICLE VII
 
                           TERMINATION AND AMENDMENT
 
     7.1  Termination. This Agreement may be terminated and the Merger may be
abandoned at any time prior to the Effective Time, whether before or after
approval of the matters presented in connection with the Merger by the
stockholders of Drilex:
 
          (a) by mutual written consent of Drilex and Baker Hughes, or by mutual
     action of their respective Boards of Directors;
 
          (b) by either Drilex or Baker Hughes if (i) the Merger shall not have
     been consummated by September 16, 1997 (provided that the right to
     terminate this Agreement under this clause (i) shall not be available to
     any party whose failure to fulfill any covenant or agreement under this
     Agreement has
 
                                       32
<PAGE>   39
 
     been the cause of or resulted in the failure of the Merger to occur on or
     before such date); (ii) any court of competent jurisdiction, or some other
     governmental body or regulatory authority shall have issued an order,
     decree or ruling or taken any other action permanently restraining,
     enjoining or otherwise prohibiting the Merger and such order, decree,
     ruling or other action shall have become final and nonappealable; or (iii)
     any required approval of the Drilex stockholders shall not have been
     obtained by reason of the failure to obtain the required vote upon a vote
     held at a duly held meeting of stockholders or at any adjournment thereof;
 
          (c) by Baker Hughes if (i) for any reason Drilex fails to call and
     hold a stockholders meeting for the purpose of voting upon this Agreement
     and the Merger by September 1, 1997 (provided that the right to terminate
     this Agreement under this Section 7.1(c) shall not be available to Baker
     Hughes if Drilex would be entitled to terminate this Agreement under
     Section 7.1(d) or if the S-4 did not become effective at least 45 days
     prior to such date); (ii) Drilex shall have failed to comply in any
     material respect with any of the covenants or agreements contained in this
     Agreement to be complied with or performed by Drilex at or prior to such
     date of termination (provided such breach has not been cured within 30 days
     following receipt by Drilex of notice of such breach and is existing at the
     time of termination of this Agreement); (iii) any representation or
     warranty of Drilex contained in this Agreement shall not be true in all
     material respects when made (provided such breach has not been cured within
     30 days following receipt by Drilex of notice of such breach and is
     existing at the time of termination of this Agreement) or on and as of the
     time of such termination as if made on and as of such time (except to the
     extent it relates to a particular date), except where the failure to be so
     true and correct (without giving effect to the individual materiality
     qualifications and thresholds otherwise contained in Section 3.1 hereof)
     could not reasonably be expected to have a Material Adverse Effect; (iv)
     after the date hereof there has been any Material Adverse Change with
     respect to Drilex, except for general economic changes or changes that may
     affect the industries of Drilex or any of its Subsidiaries generally
     (provided that a decrease in Drilex's revenues or EBITDA shall not, without
     any other facts that would constitute a Material Adverse Change, be deemed
     a Material Adverse Change unless the next clause is applicable); (v) either
     (x) Revenue for the period from April 1, 1997 to the end of the most recent
     month for which the Monthly Statements have been finally determined
     pursuant to Section 2.1 (other than April 1997) is less than $10,900,000
     (if such month is May 1997) or $15,900,000 (if such month is June 1997) or
     (y) EBITDA for the period from April 1, 1997 to the end of the most recent
     month for which the Monthly Statements have been finally determined
     pursuant to Section 2.1 (other than April 1997) is less than $1,200,000 (if
     such month is May 1997) or $1,800,000 (if such month is June 1997); or (vi)
     Drilex gives Baker Hughes written notice (expressly referencing this
     clause) stating that in Drilex's good faith belief, Drilex expects the
     provisions of clause (v) to be applicable and stating good faith expected
     amounts for Revenue and EBITDA for the periods from April 1, 1997 to May
     31, 1997 and to June 30, 1997, in which case Baker Hughes may terminate
     this Agreement by giving written notice to Drilex within seven days of
     receipt of such notice from Drilex; provided, however, that if Baker Hughes
     does not so terminate this Agreement, then the referenced amounts in
     Section 7.1(c)(v) shall be deemed amended to such lower amounts, the Drilex
     Value shall be $15.00 and the provisions of Section 2.1(e)(vii) shall cease
     to apply;
 
          (d) by Drilex if (i) Baker Hughes or Sub shall have failed to comply
     in any material respect with any of the covenants or agreements contained
     in this Agreement to be complied with or performed by it at or prior to
     such date of termination (provided such breach has not been cured within 30
     days following receipt by Baker Hughes of notice of such breach and is
     existing at the time of termination of this Agreement); (ii) any
     representation or warranty of Baker Hughes or Sub contained in this
     Agreement shall not be true in all material respects when made (provided
     such breach has not been cured within 30 days following receipt by Baker
     Hughes of notice of such breach and is existing at the time of termination
     of this Agreement) or on and as of the time of such termination as if made
     on and as of such time (except to the extent it relates to a particular
     date), except where the failure to be so true and correct (without giving
     effect to the individual materiality qualifications and thresholds
     otherwise contained in Section 3.2 hereof) could not reasonably be expected
     to have a Material Adverse Effect; or (iii) after the date hereof there has
     been any Material Adverse Change with respect to Baker Hughes,
 
                                       33
<PAGE>   40
 
     except for general economic changes or changes that may affect the
     industries of Baker Hughes or any of its Subsidiaries generally;
 
          (e) by Baker Hughes if (i) the Board of Directors of Drilex shall have
     withdrawn or modified, in any manner which is adverse to Baker Hughes, its
     recommendation or approval of the Merger or this Agreement and the
     transactions contemplated hereby or shall have resolved to do so, or (ii)
     the Board of Directors of Drilex shall have recommended to the stockholders
     of Drilex any Acquisition Proposal or any transaction described in the
     definition of Acquisition Proposal, or shall have resolved to do so;
 
          (f) by Drilex if Drilex shall exercise the right specified in clause
     (ii) of Section 4.2(a); provided that Drilex may not effect such
     termination pursuant to this Section 7.1(f) unless and until (i) Baker
     Hughes receives at least three business days' prior written notice from
     Drilex of its intention to effect such termination pursuant to this Section
     7.1(f); (ii) during such period, Drilex shall, and shall cause its
     respective financial and legal advisors to, consider any adjustment in the
     terms and conditions of this Agreement that Baker Hughes may propose; and
     (iii) Drilex pays the amounts required by Section 7.2 concurrently with
     such termination; or
 
          (g) by Baker Hughes if any Governmental Entity shall have issued any
     Injunction or taken any other action permanently imposing, prohibiting or
     compelling any of the limitations, prohibitions or compulsions set forth in
     Section 6.2(d) and such Injunction or other action shall have become final
     and nonappealable.
 
     7.2  Effect of Termination.
 
     (a) In the event of termination of this Agreement by any party hereto as
provided in Section 7.1, this Agreement shall forthwith become void and there
shall be no liability or obligation on the part of any party hereto except (i)
with respect to this Section 7.2, the second and third sentences of Section 5.4,
and Section 8.1, (ii) to the extent that such termination results from the
willful breach (except as provided in Section 8.8) by a party hereto of any of
its representations or warranties or of any of its covenants or agreements
contained in this Agreement and (iii) from the date hereof until the Termination
Date (as defined in the Stockholder Agreement), Drilex shall not participate in
any transaction or take any action to approve any transaction that treats the
Option Shares (as defined in the Stockholder Agreement) less favorably than the
outstanding shares of Drilex Common Stock generally.
 
     (b) If Baker Hughes or Drilex terminates this Agreement pursuant to Section
7.1(e) or 7.1(f), Drilex shall, on the day of such termination, pay Baker Hughes
a fee of $4,000,000 in cash by wire transfer of immediately available funds to
an account designated by Baker Hughes.
 
     (c) If this Agreement is terminated (A) by Baker Hughes or Drilex pursuant
to Section 7.1(b)(ii) or Section 7.1(g) as a result of an Injunction or other
action relating to any antitrust, trade, or regulatory laws or regulations of
any governmental, regulatory or administrative authority, agency or commission
(U.S. or foreign) ("Antitrust Laws") or (B) by Baker Hughes or Drilex pursuant
to Section 7.1(b)(i) at a time when the nonconsummation of the Mergers is a
result of the failure to satisfy the conditions set forth in Sections 6.1(c) or
(e) or Section 6.2(d) by reason, in any such case, of any Antitrust Law, and
Drilex shall not have failed to perform or observe in any material respect any
of its obligations under this Agreement (including, without limitation, Section
5.6), then Baker Hughes shall, on the day of such termination, pay to the
Company a fee of $4,000,000 in cash by wire transfer of immediately available
funds to an account designated by Drilex.
 
     (d) In the event Baker Hughes receives any fee pursuant to Section 7.2(b),
Baker Hughes shall not assert or pursue in any manner, directly or indirectly,
any claim or cause of action against Drilex or any of its affiliates, officers
or directors based in whole or in part upon a breach of this Agreement by them
or their receipt, consideration, negotiation, recommendation, or approval of an
Acquisition Proposal or the exercise by Drilex of its right of termination under
Section 7.1(f).
 
                                       34
<PAGE>   41
 
     7.3  Amendment. This Agreement may be amended by the parties hereto, by
action taken or authorized by their respective Boards of Directors, at any time
before or after approval of the matters presented in connection with the Merger
by the stockholders of Drilex, but, after any such approval, no amendment shall
be made which by law requires further approval by such stockholders without such
further approval. This Agreement may not be amended except by an instrument in
writing signed on behalf of each of the parties hereto.
 
     7.4  Extension; Waiver. At any time prior to the Effective Time, the
parties hereto, by action taken or authorized by their respective Boards of
Directors, may, to the extent legally allowed: (i) extend the time for the
performance of any of the obligations or other acts of the other parties hereto;
(ii) waive any inaccuracies in the representations and warranties contained
herein or in any document delivered pursuant hereto; and (iii) waive compliance
with any of the agreements or conditions contained herein. Any agreement on the
part of a party hereto to any such extension or waiver shall be valid only if
set forth in a written instrument signed on behalf of such party.
 
                                  ARTICLE VIII
 
                               GENERAL PROVISIONS
 
     8.1  Payment of Expenses. Each party hereto shall pay its own expenses
incident to preparing for entering into and carrying out this Agreement and the
consummation of the transactions contemplated hereby, whether or not the Merger
shall be consummated, except that the filing fees with respect to the Proxy
Statement and the S-4 shall be paid by Baker Hughes.
 
     8.2  Nonsurvival of Representations, Warranties and Agreements. None of the
representations, warranties and agreements in this Agreement or in any
instrument delivered pursuant to this Agreement shall survive the Effective Time
and any liability for breach or violation thereof shall terminate absolutely and
be of no further force and effect at and as of the Effective Time, except for
the agreements contained in Sections 2.1, 2.2, 5.9 through 5.12 and 7.2 and
Article VIII, the agreements delivered pursuant to Section 5.7 and the
representations, covenants and agreements contained in Section 5.17. The
Confidentiality Agreement shall survive the execution and delivery of this
Agreement, and the provisions of the Confidentiality Agreement shall apply to
all information and material delivered hereunder.
 
     8.3  Notices. Any notice or communication required or permitted hereunder
shall be in writing and either delivered personally, telegraphed or telecopied
or sent by certified or registered mail, postage prepaid, and shall be deemed to
be given, dated and received when so delivered personally, telegraphed or
telecopied or, if mailed, five business days after the date of mailing to the
following address or telecopy number, or to such other address or addresses as
such person may subsequently designate by notice given hereunder:
 
     (a) if to Baker Hughes or Sub, to:
 
       Baker Hughes Incorporated
       3900 Essex Lane
       Houston, Texas 77027
       Attention: Lawrence O'Donnell, III
       Facsimile: 713-439-8472
 
     with a copy to:
 
          J. David Kirkland, Jr.
        Baker & Botts, L.L.P.
        3000 One Shell Plaza
        Houston, Texas 77002
        Facsimile: 713-229-1522
 
                                       35
<PAGE>   42
 
     (b) if to Drilex, to:
 
         Drilex International Inc.
        15151 Sommermeyer
        Houston, Texas 77041
        Attention: John Forrest
        Facsimile: 713-849-2390
 
        with a copy to:
 
        Scott N. Wulfe
        Vinson & Elkins L.L.P.
        1001 Fannin
        2300 First City Tower
        Houston, Texas 77002-6760
        Facsimile: 713-758-2346
 
     8.4  Interpretation. When a reference is made in this Agreement to
Sections, such reference shall be to a Section of this Agreement unless
otherwise indicated. The table of contents, glossary of defined terms and
headings contained in this Agreement are for reference purposes only and shall
not affect in any way the meaning or interpretation of this Agreement. Whenever
the word "include," "includes" or "including" are used in this Agreement, they
shall be deemed to be followed by the words "without limitation." The phrase
"made available" in this Agreement shall mean that the information referred to
has been made available if requested by the party to whom such information is to
be made available. Unless the context otherwise requires, "or" is disjunctive
but not necessarily exclusive, and words in the singular include the plural and
in the plural include the singular. Any representations and warranties that are
qualified by the phrase "to the best knowledge" of a party or phrases with
similar wording shall be interpreted to refer to the knowledge, after reasonable
investigation, of (i) in the case of Drilex, Messrs. Forrest, Broussard, Kerr,
Simmons and Baldwin and (ii) in the case of Baker Hughes, its executive
officers.
 
     8.5  Counterparts. This Agreement may be executed in two or more
counterparts, all of which shall be considered one and the same agreement and
shall become effective when two or more counterparts have been signed by each of
the parties and delivered to the other parties, it being understood that all
parties need not sign the same counterpart.
 
     8.6  Entire Agreement; No Third Party Beneficiaries. This Agreement
(together with the Confidentiality Agreement and any other documents and
instruments referred to herein) (a) constitutes the entire agreement and
supersedes all prior agreements and understandings, both written and oral, among
the parties with respect to the subject matter hereto and (b) except as provided
in Sections 5.7, 5.9, 5.11 and 5.17, is not intended to confer upon any person
other than the parties hereto any rights or remedies hereunder.
 
     8.7  Governing Law. This Agreement shall be governed and construed in
accordance with the laws of the State of Delaware, without giving effect to the
principles of conflicts of law thereof.
 
     8.8  No Remedy in Certain Circumstances. Each party agrees that, should any
court or other competent authority hold any provision of this Agreement or part
hereof to be null, void or unenforceable, or order any party to take any action
inconsistent herewith or not to take an action consistent herewith or required
hereby, the validity, legality and enforceability of the remaining provisions
and obligations contained or set forth herein shall not in any way be affected
or impaired thereby, unless the foregoing inconsistent action or the failure to
take an action constitutes a material breach of this Agreement or makes the
Agreement impossible to perform in which case this Agreement shall terminate
pursuant to Article VII hereof. Except as otherwise contemplated by this
Agreement, to the extent that a party hereto took an action inconsistent
herewith or failed to take action consistent herewith or required hereby
pursuant to an order or judgment of a court or other competent authority, such
party shall not incur any liability or obligation unless such party breached its
obligations under Section 5.6 hereof or did not in good faith seek to resist or
object to the imposition or entering of such order or judgment.
 
                                       36
<PAGE>   43
 
     8.9  Assignment. Neither this Agreement nor any of the rights, interests or
obligations hereunder shall be assigned by any of the parties hereto (whether by
operation of law or otherwise) without the prior written consent of the other
parties, except that Sub may assign, in its sole discretion, any or all of its
rights, interests and obligations hereunder to any newly formed direct wholly
owned Subsidiary of Baker Hughes. Subject to the preceding sentence, this
Agreement will be binding upon, inure to the benefit of and be enforceable by
the parties and their respective successors and assigns.
 
     8.10  Schedules. For purposes of this Agreement, Schedules shall mean the
Schedules contained in the Confidential Disclosure Schedule, dated the date
hereof, delivered in connection with this Agreement and initialed by the parties
hereto.
 
     IN WITNESS WHEREOF, each party has caused this Agreement to be signed by
its respective officers thereunto duly authorized, all as of the date first
written above.
 
                                            BAKER HUGHES INCORPORATED
 
                                            By:      /s/ ERIC L. MATTSON
                                              ----------------------------------
                                                       Eric L. Mattson
                                                  Senior Vice President and
                                                   Chief Financial Officer
 
                                            BAKER HUGHES MERGER, INC.
 
                                            By:      /s/ ERIC L. MATTSON
                                              ----------------------------------
                                                       Eric L. Mattson
                                                          President
 
                                            DRILEX INTERNATIONAL INC.
 
                                            By:       /s/ L. E. SIMMONS
                                              ----------------------------------
                                                        L. E. Simmons
                                                    Chairman of the Board
 
                                       37

<PAGE>   1
                                                                    EXHIBIT 99.2
 
                                                                  Execution Copy
 
                             STOCKHOLDER AGREEMENT
 
     This Stockholder Agreement dated as of April 16, 1996 is between Baker
Hughes Incorporated, a Delaware corporation ("Baker Hughes") and DRLX Partners,
L.P., a Delaware limited partnership (the "Stockholder").
 
     WHEREAS, Baker Hughes, Baker Hughes Merger, Inc., a Delaware corporation
and a wholly owned subsidiary of Baker Hughes ("Sub"), and Drilex International
Inc. ("Drilex"), a Delaware corporation, are entering into an Agreement and Plan
of Merger dated as of the date hereof (as amended from time to time pursuant
thereto, the "Merger Agreement");
 
     WHEREAS, the Stockholder is the record and beneficial owner of 4,119,207
shares of Common Stock, par value $0.01 per share, of Drilex (the "Drilex Common
Stock") (such shares of Drilex Common Stock, together with any shares of capital
stock of the Drilex acquired by the Stockholder after the date hereof and during
the term of this Agreement, being collectively referred to herein as the
"Stockholder Shares");
 
     WHEREAS, as a condition to the willingness of Baker Hughes to enter into
the Merger Agreement, and as an inducement to it to do so, the Stockholder has
agreed for the benefit of Baker Hughes as set forth in this Agreement; and
 
     WHEREAS, the Board of Directors of Drilex has approved the Stockholder's
entering into this Agreement, the form of this Agreement and the transactions
contemplated hereby;
 
     NOW, THEREFORE, in consideration of the premises and the representations,
warranties, covenants and agreements contained in this Agreement, the parties
hereby agree as follows (terms defined in the Merger Agreement and used but not
defined herein having the meanings assigned to such terms in the Merger
Agreement):
 
                                   ARTICLE I
 
                                   THE OPTION
 
     Section 1.01. Grant of the Option. The Stockholder hereby grants to Baker
Hughes an irrevocable option (the "Option") to purchase, on the terms and
subject to the conditions set forth herein, at a per share cash exercise price
of $16.00 (the "Exercise Price"), up to 1,665,839 Stockholder Shares, together
with (i) any additional shares of capital stock of the Drilex or any securities
or other property that the Stockholder is or becomes entitled to receive from
Drilex by reason of being a record holder of such number of Stockholder Shares,
(ii) any capital stock, securities or other property into which any such number
of Stockholder Shares shall have been or shall be converted or changed, whether
by amendment to the Certificate of Incorporation of the Company, merger,
consolidation, reorganization, capital change or otherwise, (iii) any additional
Drilex Common Stock acquired by the Stockholder as the result of the
Stockholder's exercising an option, warrant or other right to acquire shares of
capital stock from Drilex issued with respect to such number of Stockholder
Shares (all of the foregoing hereinafter collectively referred to as the
"Additional Stockholder Shares"), and (iv) any shares of capital stock,
securities or property referred to in clauses (i), (ii), and (iii) above that
are issued or issuable in respect of Additional Stockholder Shares (such
Stockholder Shares, the Additional Stockholder Shares and any shares, securities
or property referred to in clause (iv) above being collectively referred to
herein as the "Option Shares").
 
                                        1
<PAGE>   2
 
     Section 1.02. Exercise of the Option. (a) Subject to the conditions set
forth in Section 1.03, the Option may be exercised in whole at any time, and in
part from time to time, after the occurrence of a Triggering Event but prior to
the Termination Date.
 
     (b) For purposes hereof, a "Triggering Event" means:
 
          (i) the termination of the Merger Agreement pursuant to Section 7.1(e)
     or Section 7.1(f), or pursuant to Sections 7.1(b) (i) or (iii) or 7.1(c)
     (i) or (ii) after the public announcement of, or the disclosure to the
     Board of Directors of Drilex of, an Acquisition Proposal; or
 
          (ii) the occurrence of any event giving Baker Hughes the right to
     terminate the Merger Agreement pursuant to Section 7.1(e) thereof.
 
For purposes hereof, the "Termination Date" means the first to occur of (1) the
Effective Time of the Merger and (2) the close of business on the date 45 days
after the termination of the Merger Agreement, provided such date shall be
extended (but in no event beyond October 31, 1997) if an Acquisition Proposal is
pending until the close of business on the third business day after the
Stockholder gives Baker Hughes notice of the consummation, withdrawal or
termination of the Acquisition Proposal if at such time no other Acquisition
Proposal is pending.
 
     (c) In the event Baker Hughes wishes to exercise the Option, Baker Hughes
will send a written notice to the Stockholder specifying a place, date (not less
than two business days nor more than 10 calendar days after the date such notice
is given) and time for the closing of the purchase of such Option Shares (the
"Closing").
 
     (d) The purchase price payable to the Stockholder with respect to any
exercise of the Option will be the product of (i) the Exercise Price and (ii)
the number of Option Shares to be purchased upon such exercise.
 
     (e) In the event of any change in the number of issued and outstanding
shares of Drilex Common Stock by reason of any stock dividend, split-up,
recapitalization, combination, conversion, exchange of shares or other change in
the corporate or capital structure of Drilex, the number and kind of shares
subject to the Option and the Exercise Price shall be adjusted appropriately.
If, on or after the date hereof, Drilex should declare or pay any cash or stock
dividend or other distribution or issue any rights with respect to the Drilex
Common Stock, payable or distributable to stockholders of record on a date prior
to the transfer to the name of Baker Hughes or its nominee on Ship's stock
transfer books of the Option Shares, and the Option is exercised, then (a) the
exercise price per Option Share will be reduced by the amount of any such cash
dividend or cash distribution, and (b) the whole of any such non-cash dividend,
distribution or right which would have been payable with respect to each Option
Share purchased by Baker Hughes if such shares were outstanding on the record
date for such distribution will be promptly remitted and transferred by the
Stockholder to Baker Hughes. Upon exercise of the Option, to the extent
consistent with law, pending such remittance, Baker Hughes will be entitled to
all rights and privileges as owner of any such non-cash dividend, distribution
or right with respect to each Option Share purchased.
 
     Section 1.03. Closing. (a) At the Closing, the Stockholder will deliver to
Baker Hughes a certificate or certificates representing the Option Shares being
purchased, duly endorsed for transfer or accompanied by appropriate stock powers
duly executed in blank, and Baker Hughes will pay the purchase price in
immediately available funds by wire transfer to an account designated by the
Stockholder. Transfer taxes, if any, imposed as a result of the exercise of the
Option and the transfer of any Option Shares will be paid by the Stockholder.
 
     (b) The obligations of Baker Hughes and the Stockholder to consummate the
purchase and sale of the Option Shares pursuant to this Article I will be
subject to the fulfillment of the following conditions:
 
          (i) The expiration or termination of the waiting period applicable to
     the consummation of such transactions under the HSR Act; and
 
          (ii) Neither of the parties hereto shall be subject to any order of
     injunction of a court of competent jurisdiction which prohibits the
     consummation of such transactions.
 
                                        2
<PAGE>   3
 
Each of the parties will promptly make, and will use all reasonable efforts to
cause each of their respective affiliates to make, all such filings and take all
such actions as may be reasonably required in order to permit the lawful
exercise of the Option, as promptly as possible. The date of any Closing may be
extended, if required, to the next business day following (1) the date that any
applicable waiting period under the HSR Act shall have expired or been earlier
terminated (but not beyond August 31, 1997 unless Drilex shall not have complied
with its obligations under the Merger Agreement with respect thereto), (2) the
date that all other necessary governmental approvals for the sale of the Option
Shares for which the Option shall have been exercised shall have been obtained,
and (3) the satisfaction of any other condition to the Closing; provided that
any delay pursuant to clauses (2) or (3) shall not exceed 10 business days.
 
     Section 1.04. Registration Rights Agreement. If Baker Hughes purchases any
Option Shares, the Option Shares so purchased shall be "Registrable Securities"
and Baker Hughes shall become a "Holder" for purposes of the Restated
Registration Rights Agreement dated as of June 14, 1996 among Drilex and the
stockholders party thereto, and Baker Hughes shall be entitled to the benefits
of such Agreement notwithstanding any restrictions on transfer or assignment
contained in Section 11(j) thereof. This Agreement shall, to the extent
necessary, be deemed an amendment to such registration rights agreement to
effectuate the provisions of this Section.
 
                                   ARTICLE II
 
                          COVENANTS OF THE STOCKHOLDER
 
     Section 2.01. Agreement to Vote. At any meeting of the stockholders of
Drilex held prior to the earlier of (i) the Effective Time of the Merger and
(ii) the termination of the Merger Agreement (such earlier time being herein
referred to as the "Voting Termination Date"), however called, and at every
adjournment or postponement thereof prior to the Voting Termination Date, or in
connection with any written consent of the stockholders of Drilex given prior to
the Voting Termination Date, the Stockholder shall vote or cause to be voted the
Stockholder Shares in favor of the approval of the Merger and each of the other
transactions contemplated by the Merger Agreement and in favor of the approval
and adoption of the Merger Agreement, and any actions required in furtherance
hereof and thereof. The Stockholder shall not enter into any agreement or
understanding with any person prior to the Voting Termination Date, directly or
indirectly, to vote, grant any proxy or give instructions with respect to the
voting of the Stockholder Shares in any manner inconsistent with the preceding
sentence.
 
     Section 2.02. Proxies and Voting Agreements. The Stockholder hereby revokes
any and all previous proxies granted with respect to matters set forth in
Section 2.01. Prior to the Voting Termination Date, the Stockholder shall not,
directly or indirectly, except as contemplated hereby, grant any proxies or
powers of attorney with respect to matters set forth in Section 2.01, deposit
any of the Stockholder Shares or enter into a voting agreement with respect to
any of the Stockholder Shares.
 
     Section 2.03. No Solicitation.
 
     (a) From and after the date hereof until the termination of the Merger
Agreement, the Stockholder will not, and will not authorize or permit any of its
officers, directors, employees, partners, agents, affiliates or other
representatives (collectively, "Stockholder Representatives") to, directly or
indirectly, solicit or encourage (including by way of providing information) any
prospective acquiror or the invitation or submission of any inquiries, proposals
or offers or any other efforts or attempts that constitute, or may reasonably be
expected to lead to, an Acquisition Proposal.
 
     (b) The Stockholder shall immediately cease and cause to be terminated any
existing solicitation, initiation, encouragement, activity, discussion or
negotiation with any parties conducted heretofore by the Stockholder or any
Stockholder Representatives with respect to any Acquisition Proposal existing on
the date hereof.
 
     (c) Prior to the termination of the Merger Agreement, the Stockholder will
promptly notify Baker Hughes of any requests for information made to the
Stockholder or any Stockholder Representative or the
 
                                        3
<PAGE>   4
 
receipt of any Acquisition Proposal made to the Stockholder or any Stockholder
Representative, including the identity of the person or group engaging in such
discussions or negotiations, requesting such information or making such
Acquisition Proposal, and the material terms and conditions of any Acquisition
Proposal.
 
     (d) Prior to the termination of the Merger Agreement, the Stockholder shall
not enter into any agreement with any person that provides for, or in any way
facilitates, an Acquisition Proposal.
 
     (e) The provisions of this Section 2.03 do not prohibit any Stockholder
Representative who is also a Drilex Representative from taking actions permitted
by Section 4.2 of the Merger Agreement.
 
     Section 2.04. Transfer of Option Shares by the Stockholder. Prior to the
Termination Date, the Stockholder shall not (a) subject any of the Option Shares
to, or suffer to exist on any of the Option Shares, any lien, pledge, security
interest, charge or other encumbrance or restriction, other than pursuant to
this Agreement or the terms of the existing partnership agreement of the
Stockholder (the "Partnership Agreement"), or (b) sell, transfer, assign, convey
or otherwise dispose of any of the Option Shares (including any such action by
operation of law), other than a disposition by operation of law pursuant to the
Merger. Prior to the record date for the Drilex stockholder meeting to vote on
the Merger Agreement, the Stockholder will not sell, transfer, assign, convey or
otherwise dispose of any of the Stockholder Shares (including any such action of
operation of law).
 
     Section 2.05. Other Actions. Prior to the Termination Date, the Stockholder
shall not take any action that would in any way restrict, limit, impede or
interfere with the performance of its obligations hereunder or the transactions
contemplated hereby or by the Merger Agreement.
 
                                  ARTICLE III
 
              REPRESENTATIONS, WARRANTIES AND ADDITIONAL COVENANTS
                               OF THE STOCKHOLDER
 
     The Stockholder represents, warrants and covenants to Baker Hughes that:
 
     Section 3.01. Ownership. The Stockholder is as of the date hereof the
beneficial and record owner of the Stockholder Shares, the Stockholder has the
sole right to vote the Stockholder Shares and there are no restrictions on
rights of disposition or other lien, pledge, security interest, charge or other
encumbrance or restriction pertaining to the Stockholder Shares other than the
terms of the Partnership Agreement. Except as provided in the terms of the
Partnership Agreement, none of the Stockholder Shares is subject to any voting
trust or other agreement, arrangement or restriction with respect to the voting
of the Stockholder Shares, and no proxy, power of attorney or other
authorization has been granted with respect to any of the Stockholder Shares.
Upon delivery of any Option Shares upon exercise of the Option, Baker Hughes
will acquire good title to such shares, free and clear of all liens, pledges,
security interests, charges or other encumbrances or restrictions.
 
     Section 3.02. Authority and Non-Contravention. The Stockholder is a limited
partnership duly formed and validly existing under the laws of the State of
Delaware. The Stockholder has the right, power and authority, and the
Stockholder has been duly authorized by all necessary action (including
consultation, approval or other action by or with any other person), to execute,
deliver and perform this Agreement and consummate the transactions contemplated
hereby. Such actions by the Stockholder (a) require no action by or in respect
of, or filing with, any Governmental Entity with respect to the Stockholder,
other than any required filings under Section 13 of the Exchange Act or under
the HSR Act, and (b) do not and will not contravene or constitute default under
any provision of applicable law or regulation or any agreement, judgment,
injunction, order, decree or other instrument binding on the Stockholder or
result in the imposition of any lien, pledge, security interest, charge or other
encumbrance or restriction on any of the Stockholder Shares (other than as
provided in this Agreement with respect to Stockholder Shares).
 
     Section 3.03. Binding Effect. This Agreement has been duly executed and
delivered by the Stockholder and is the valid and binding agreement of the
Stockholder, enforceable against the Stockholder in accordance with its terms,
except as enforcement may be limited by bankruptcy, insolvency, moratorium or
other similar
 
                                        4
<PAGE>   5
 
laws relating to creditors' rights generally and by equitable principles to
which the remedies of specific performance and injunctive and similar forms of
relief are subject.
 
     Section 3.04. Total Shares. The Stockholder Shares are the only shares of
capital stock of Drilex owned beneficially or of record as of the date hereof by
the Stockholder, and the Stockholder does not have any option to purchase or
right to subscribe for or otherwise acquire any securities of Drilex and has no
other interest in or voting rights with respect to any other securities of
Drilex.
 
     Section 3.05. Finder's Fees. No investment banker, broker or finder is
entitled to a commission or fee from Drilex, Baker Hughes or Sub in respect of
this Agreement based upon any arrangement or agreement made by or on behalf of
the Stockholder, except as otherwise provided in the Merger Agreement.
 
     Section 3.06. Reasonable Efforts. Prior to the Termination Date, the
Stockholder shall use reasonable efforts to take, or cause to be taken, all
actions, and to do, or cause to be done, and to assist and cooperate with Baker
Hughes in doing, all things necessary, proper or advisable to consummate and
make effective the Merger and the other transactions contemplated by the Merger
Agreement and this Agreement. Subject to Section 5.17 of the Merger Agreement,
Baker Hughes shall use reasonable efforts to take, or cause to be taken, all
actions, and to do, or cause to be done, and to assist and cooperate with the
Stockholder in doing, all things necessary, proper or advisable to allow the
Stockholder to sell publicly shares of Baker Hughes Common Stock received in the
Merger without any unreasonable delay or restrictions.
 
                                   ARTICLE IV
 
           REPRESENTATIONS, WARRANTIES AND COVENANTS OF BAKER HUGHES
 
     Baker Hughes represents, warrants and covenants to the Stockholder that:
 
     Section 4.01. Corporate Power and Authority. Baker Hughes has all requisite
corporate power and authority to enter into this Agreement and to perform its
obligations hereunder. The execution, delivery and performance by Baker Hughes
of this Agreement and the consummation by Baker Hughes of the transactions
contemplated hereby have been duly authorized by all necessary corporate action
on the part of Baker Hughes.
 
     Section 4.02. Binding Effect. This Agreement has been duly executed and
delivered by Baker Hughes and is a valid and binding agreement of Baker Hughes,
enforceable against Baker Hughes in accordance with its terms, except as
enforcement may be limited by bankruptcy, insolvency, moratorium or other
similar laws relating to creditors' rights generally and by equitable principles
to which the remedies of specific performance and injunctive and similar forms
of relief are subject.
 
                                   ARTICLE V
 
                                 MISCELLANEOUS
 
     Section 5.01. Expenses. Each party hereto shall pay its own expenses
incident to preparing for entering into and carrying out this Agreement and the
consummation of the transactions contemplated hereby.
 
     Section 5.02. Further Assurances. From time to time, at the request of the
other party, each party shall execute and deliver or cause to be executed and
delivered such additional documents and instruments and take all such further
action as may be necessary or desirable to consummate the transactions
contemplated by this Agreement.
 
     Section 5.03. Specific Performance. The Stockholder agrees that Baker
Hughes would be irreparably damaged if for any reason the Stockholder fails to
perform any of the Stockholder's obligations under this Agreement, and that
Baker Hughes would not have an adequate remedy at law for money damages in such
event. Accordingly, Baker Hughes shall be entitled to seek specific performance
and injunctive and other equitable relief to enforce the performance of this
agreement by the Stockholder. This provision is without prejudice to any other
rights that Baker Hughes may have against the Stockholder for any failure to
perform its obligations under this Agreement.
 
                                        5
<PAGE>   6
 
     Section 5.04. Notices. Any notice or communication required or permitted
hereunder shall be in writing and either delivered personally, telegraphed or
telecopied or sent by certified or registered mail, postage prepaid, and shall
be deemed to be given, dated and received when so delivered personally,
telegraphed or telecopied or, if mailed, five business days after the date of
mailing to the following address or telecopy number, or to such other address or
addresses as such person may subsequently designate by notice given hereunder:
 
     (a) if to Baker Hughes or Sub, to:
 
       Baker Hughes Incorporated
       3900 Essex Lane
       Houston, Texas 77027
       Attention: Lawrence O'Donnell, III
       Facsimile: 713-439-8472
 
       with a copy to:
 
       J. David Kirkland, Jr.
       Baker & Botts, L.L.P.
       3000 One Shell Plaza
       Houston, Texas 77002
       Facsimile: 713-229-1522
 
     (b) if to Stockholder, to:
 
        DRLX Partners, L.P.
        SCF Partners, L.P.
        6600 Texas Commerce Tower
        Houston, Texas 77002
        Attention: L. E. Simmons
        Facsimile: 713-227-7850
 
        with a copy to:
 
        Curtis W. Huff
        Fulbright & Jaworski L.L.P.
        1301 McKinney, Suite 5100
        Houston, Texas 77010
        Facsimile: 713-651-5246
 
     Section 5.06. Interpretation. When a reference is made in this Agreement to
Sections, such reference shall be to a Section of this Agreement unless
otherwise indicated. The headings contained in this Agreement are for reference
purposes only and shall not affect in any way the meaning or interpretation of
this Agreement. Whenever the word "include," "includes" or "including" are used
in this Agreement, they shall be deemed to be followed by the words "without
limitation." Unless the context otherwise requires, "or" is disjunctive but not
necessarily exclusive, and words in the singular include the plural and in the
plural include the singular. The term "person" is to be interpreted broadly to
include any corporation, partnership, trust, limited liability company,
government or other entity and any group (as used with respect to Section 13(d)
of the Exchange Act).
 
     Section 5.07. Counterparts. This Agreement may be executed in two or more
counterparts, all of which shall be considered one and the same agreement and
shall become effective when two or more counterparts have been signed by each of
the parties and delivered to the other party, it being understood that all
parties need not sign the same counterpart.
 
     Section 5.08. Entire Agreement; No Third Party Beneficiaries. This
Agreement (a) constitutes the entire agreement and supersedes all prior
agreements and understandings, both written and oral, among the parties
 
                                        6
<PAGE>   7
 
with respect to the subject matter hereto and (b) is not intended to confer upon
any person other than the parties hereto any rights or remedies hereunder.
 
     Section 5.09. Governing Law. This Agreement shall be governed and construed
in accordance with the laws of the State of Delaware, without giving effect to
the principles of conflicts of law thereof.
 
     Section 5.10. Assignment. Neither this Agreement nor any of the rights,
interests or obligations hereunder shall be assigned by any of the parties
hereto (whether by operation of law or otherwise) except to the partners of the
Stockholder as permitted herein without the prior written consent of the other
party. Subject to the preceding sentence, this Agreement will be binding upon,
inure to the benefit of and be enforceable by the parties and their respective
successors and assigns. All costs and expenses incurred in connection with this
Agreement shall be paid by the party incurring such cost or expense.
 
     Section 5.11. Amendments; Termination. This Agreement may not be modified,
amended, altered or supplemented, except upon the execution and delivery of a
written agreement executed by the parties hereto.
 
     Section 5.12. Certain Events. (a) The Stockholder agrees that this
Agreement and the obligations hereunder shall attach to the Stockholder Shares
beneficially owned by such Stockholder and shall be binding upon any person to
which legal or beneficial ownership of such shares shall pass, whether by
operation of law or otherwise; provided that if the Stockholder distributes any
Stockholder Shares other than Option Shares to its limited partners, then
Section 2.01 only shall be binding on such limited partners and if a limited
partner publicly sells such shares, this Agreement shall cease to apply to such
shares.
 
     (b) If any Stockholder Shares other than Option Shares are distributed to
the limited partners of the Stockholder prior to 30 days prior to the Effective
Time, no limited partner who beneficially owns shares of Drilex Common Stock
(excluding Option Shares retained by the Stockholder) representing less than 10%
of the outstanding Drilex Common Stock shall be treated as an Affiliate for
purposes of Section 5.7 of the Merger Agreement.
 
     Section 5.13. Severability. Whenever possible, each provision or portion of
any provision of this Agreement will be interpreted in such manner as to be
effective and valid but if any provision or portion of any provision of this
agreement is held to be invalid, illegal or unenforceable in any respect, such
invalidity, illegality or unenforceability will not affect any other provision
or portion of any provision, and this Agreement will be reformed, construed and
enforced as if such invalid, illegal or unenforceable provision or portion of
any provision had never been contained herein. The parties shall endeavor in
good faith negotiations to replace any invalid, illegal or unenforceable
provision with a valid provision the effects of which come as close as possible
to those of such invalid, illegal or unenforceable provision.
 
     Section 5.14. Attorneys' Fees. If any action at law or in equity is
necessary to enforce or interpret the terms of this Agreement, the prevailing
party shall be entitled to reasonable attorneys' fees, costs and necessary
disbursements, in addition to any other relief to which such party may be
entitled.
 
                                        7
<PAGE>   8
 
     IN WITNESS WHEREOF, Baker Hughes and the Stockholder have caused this
Agreement to be duly executed as of the day and year first above written.
 
                                            DRLX PARTNERS, L.P.
                                            By: SCF Partners, L.P., general
                                            partner
                                                 By: L. E. Simmons & Associates,
                                                     Incorporated, general
                                                     partner
 
                                            By      /s/ L. E. SIMMONS
                                             -----------------------------------
                                                        L. E. Simmons
                                                          President
 
                                            BAKER HUGHES INCORPORATED
 
                                            By     /s/ ERIC L. MATTSON
                                             -----------------------------------
                                                       Eric L. Mattson
                                                  Senior Vice President and
                                                   Chief Financial Officer
 
Consented to for purposes of Section
1.04:
 
DRILEX INTERNATIONAL INC.
 
By:      /s/ L. E. SIMMONS
    --------------------------------
             L. E. Simmons
         Chairman of the Board
 
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