CAMCO INTERNATIONAL INC
8-K, 1998-06-23
PUMPS & PUMPING EQUIPMENT
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<PAGE>   1


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                                 UNITED STATES
                       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):     JUNE 18, 1998




                            CAMCO INTERNATIONAL INC.
               (Exact name of Registrant as specified in charter)





<TABLE>
<S>                               <C>                              <C>
      Delaware                          1-10718                                 13-3517570
(State of Incorporation)          (Commission File No.)             (I.R.S. Employer Identification No.)
</TABLE>



                                  7030 Ardmore
                               Houston, Tx  77054
                                 (713) 747-4000





  (Address, including Zip Code, and Telephone Number, including Area Code, of
                          Principal Executive Office)



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<PAGE>   2
Item 5.  Other Events.

         On June 18, 1998, Camco International Inc. entered into an Agreement
and Plan of Merger (the "Merger Agreement") with Schlumberger Technology
Corporation, a Texas corporation ("STC"), and Schlumberger OFS, Inc., a
Delaware corporation and a wholly-owned subsidiary of STC ("Sub"), providing
for the merger of Sub with and into Camco, with Camco surviving as a wholly-
owned subsidiary of STC (the "Merger").   STC is a wholly-owned subsidiary of
Schlumberger Limited, a publicly traded Netherlands Antilles corporation
("Schlumberger").  Pursuant to the Merger Agreement, the stockholders of Camco
will receive 1.18 shares of common stock, par value $.01 per share, of
Schlumberger ("Schlumberger Common Stock") for each share of common stock, par
value $.01 per share, of Camco  ("Camco Common Stock").  In addition,
outstanding options to acquire shares of Camco Common Stock will be converted
into options to acquire 1.18 times as many shares of Schlumberger Common Stock
at an exercise price per share equal to the old exercise price per share
divided by 1.18.

         Closing under the Merger Agreement is conditioned on, among other
things, approval by Camco's stockholders and receipt of all regulatory
approvals including but not limited to the expiration or termination of the
waiting period prescribed by the Hart-Scott-Rodino Antitrust Improvements Act
of 1976, as amended.  It is intended that the Merger qualify as a tax-free
reorganization for federal income tax purposes and as a pooling of interests
for accounting purposes.

         Under the Merger Agreement, Camco must pay a termination fee of $90
million if (1) Camco receives a Superior Proposal (as defined in the Merger
Agreement) and elects to terminate the agreement, (2) the Camco Board of
Directors recommends or proposes to recommend an alternate proposal and STC
exercises its right to terminate the agreement, (3) the Camco Board withdraws,
terminates or modifies its recommendation of the agreement in an adverse
manner, STC terminates the agreement and Camco consummates an alternative
transaction on or before September 30, 1999 or (4) there is an alternative
proposal outstanding, the Camco stockholders do not approve the Merger and
Camco consummates an alternative proposal on or before September 30, 1999.

         Pursuant to a related Transaction Agreement, Schlumberger agrees to
sell to STC such number of shares of Schlumberger Common Stock as are required
to be delivered to stockholders of Camco under the Merger Agreement and to
register those shares with the Securities and Exchange Commission.

         The description of the terms and provisions of the Merger Agreement in
this report is qualified in its entirety by reference to the Merger Agreement
and the Transaction Agreement that are filed as exhibits hereto and are
incorporated herein by this reference.  A copy of the press release announcing
the signing of the Merger Agreement is filed as Exhibit 99.1 and is
incorporated herein by this reference.





                                      -2-
<PAGE>   3
         Prior to approving the Merger Agreement, the Board of Directors
amended Camco's Rights Agreement dated as of December 15, 1994, as amended, to
provide that neither Schlumberger nor any of its Subsidiaries would be an
Acquiring Person within the meaning of the Rights Agreement as a result of the
Merger Agreement or the transactions contemplated thereby. A copy of such
amendment to such Rights Agreement is filed as an exhibit hereto.





                                      -3-
<PAGE>   4
Item 7.  Financial Statements and Exhibits

         (c)     Exhibits

         2.1     -        Agreement and Plan of Merger among Schlumberger
                          Technology Corporation, a Texas corporation,
                          Schlumberger OFS, Inc., a Delaware corporation, and
                          Camco International Inc. dated as of June 18, 1998.

         4.1     -        Second Amendment to Rights Agreement dated June 18,
                          1998, between Camco International Inc. and First
                          Chicago Trust Company of New York.

         10.1    -        Transaction Agreement between Schlumberger Limited
                          and Camco International Inc., dated as of June 18,
                          1998.

         99.1    -        Press Release dated June 18, 1998, announcing the
                          signing of the Merger Agreement.





                                      -4-
<PAGE>   5
                                   SIGNATURES

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



                                        CAMCO INTERNATIONAL INC.



June 23, 1998                               /s/ Ronald R. Randall   
                                        ----------------------------






                                      -5-
<PAGE>   6
                               INDEX TO EXHIBITS



Number                              Exhibit

2.3              Agreement and Plan of Merger among Schlumberger Technology
                 Corporation, a Texas corporation, Schlumberger OFS, Inc., a
                 Delaware corporation, and Camco International, Inc., a
                 Delaware corporation, dated as of June 18, 1998.

4.1              Second Amendment to Rights Agreement dated June 18, 1998,
                 between Camco International Inc. and First Chicago Trust
                 Company of New York.

10.1             Transaction Agreement between Schlumberger Limited and Camco
                 International Inc., a Delaware corporation, dated as of June
                 18, 1998.

99.1             Press Release dated June 18, 1998, announcing the signing of
                 the Merger Agreement.






<PAGE>   1
                                                                     EXHIBIT 2.3




                          AGREEMENT AND PLAN OF MERGER

                                     AMONG

                      SCHLUMBERGER TECHNOLOGY CORPORATION,

                             SCHLUMBERGER OFS, INC.

                                      AND

                            CAMCO INTERNATIONAL INC.

                           DATED AS OF JUNE 18, 1998
<PAGE>   2
                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                                     Page
                                                                                                                     ----
         <S>                                                                                                           <C>

                                                            ARTICLE I
                                                            THE MERGER

         1.1       The Merger; Effective Time of the Merger   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
         1.2       Closing  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
         1.3       Effects of the Merger  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

                                                            ARTICLE II
                                         EFFECT OF THE MERGER ON THE CAPITAL STOCK OF THE
                                        CONSTITUENT CORPORATIONS; EXCHANGE OF CERTIFICATES

         2.1       Effect on Capital Stock  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
                   (a)    Stock of Sub  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
                   (b)    Cancellation of Treasury Stock and Related Party Stock  . . . . . . . . . . . . . . . . . . . 2
                   (c)    Exchange Ratio for Camco Common Stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
                   (d)    Conversion of Stock Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
                   (e)    Adjustment of Conversion Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
         2.2       Exchange of Certificates   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
                   (a)    Exchange Agent  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
                   (b)    Exchange Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
                   (c)    Distributions with Respect to Shares Prior to Exchange of Certificates  . . . . . . . . . . . 5
                   (d)    No Further Ownership Rights in Camco Common Stock . . . . . . . . . . . . . . . . . . . . . . 6
                   (e)    No Fractional Shares  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
                   (f)    Termination of Exchange Fund  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
                   (g)    No Liability.   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

                                                           ARTICLE III
                                                  REPRESENTATIONS AND WARRANTIES

         3.1       Representations and Warranties of Camco  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
                   (a)    Organization, Standing and Power  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
                   (b)    Capital Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
                   (c)    Authority; No Violations; Consents and Approvals  . . . . . . . . . . . . . . . . . . . . . . 9
                   (d)    SEC Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
                   (e)    Information Supplied  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  12
                   (f)    Absence of Certain Changes or Events  . . . . . . . . . . . . . . . . . . . . . . . . . . .  12
                   (g)    No Undisclosed Material Liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13
                   (h)    No Default  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13
                   (i)    Compliance with Applicable Laws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  13
</TABLE>


                                                               -i-
<PAGE>   3
<TABLE>
         <S>       <C>                                                                                                 <C>
                   (j)    Litigation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
                   (k)    Taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
                   (l)    Employee Matters; ERISA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  16
                   (m)    Labor Matters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  18
                   (n)    Intangible Property . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  19
                   (o)    Environmental Matters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  20
                   (p)    Opinion of Financial Advisor  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  22
                   (q)    State Takeover Statutes; Vote Required  . . . . . . . . . . . . . . . . . . . . . . . . . .  22
                   (r)    Accounting Matters  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
                   (s)    Beneficial Ownership of Schlumberger Common Stock . . . . . . . . . . . . . . . . . . . . .  23
                   (t)    Insurance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
                   (u)    Brokers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
                   (v)    Material Contracts and Agreements . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
                   (w)    Title to Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  23
                   (x)    Amendment to the Camco Rights Agreement . . . . . . . . . . . . . . . . . . . . . . . . . .  24
         3.2       Representations and Warranties of STC and Sub  . . . . . . . . . . . . . . . . . . . . . . . . . .  24
                   (a)    Organization, Standing and Power  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  24
                   (b)    Capital Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  25
                   (c)    Authority; No Violations, Consents and Approvals  . . . . . . . . . . . . . . . . . . . . .  25
                   (d)    Litigation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  26
                   (e)    Accounting Matters  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  26
                   (f)    Beneficial Ownership of Camco Common Stock  . . . . . . . . . . . . . . . . . . . . . . . .  27
                   (g)    Transaction Agreement.    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  27
                   (h)    No Other Consideration for Camco Common Stock . . . . . . . . . . . . . . . . . . . . . . .  27

                                                            ARTICLE IV
                                        COVENANTS RELATING TO CONDUCT OF BUSINESS OF CAMCO

         4.1       Conduct of Business by Camco Pending the Merger  . . . . . . . . . . . . . . . . . . . . . . . . .  27
                   (a)    Ordinary Course . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  27
                   (b)    Dividends; Changes in Stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  27
                   (c)    Issuance of Securities  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  28
                   (d)    Governing Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  28
                   (e)    No Acquisitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  28
                   (f)    No Dispositions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  28
                   (g)    No Dissolution, Etc.  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
                   (h)    Certain Employee Matters  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  29
                   (i)    Indebtedness; Leases; Capital Expenditures  . . . . . . . . . . . . . . . . . . . . . . . .  30
                   (j)    Taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  30
                   (k)    Accounting  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  30
         4.2       No Solicitation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  30
         4.3       Pooling of Interests   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  32
</TABLE>





                                      -ii-
<PAGE>   4
<TABLE>
         <S>       <C>                                                                                                 <C>
                                                            ARTICLE V
                                                      ADDITIONAL AGREEMENTS


         5.1       Access to Information  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33
         5.2       Camco Stockholders' Meeting  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33
         5.3       Legal Conditions to Merger   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  33
         5.4       Agreements of Others   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  35
         5.5       Stock Options  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  35
         5.6       Indemnification; Directors' and Officers' Insurance  . . . . . . . . . . . . . . . . . . . . . . .  36
         5.7       Agreement to Defend  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  37
         5.8       Accounting Matters   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  37
         5.9       Public Announcements   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  37
         5.10      Other Actions  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  37
         5.11      Advice of Changes; SEC Filings   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38
         5.12      Reorganization   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38
         5.13      Delivery of Schlumberger Common Stock  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38
         5.14      Employee Matters   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38
                   (a)    Employment.   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  38
                   (b)    Benefits Accrued at the Effective Time.   . . . . . . . . . . . . . . . . . . . . . . . . .  38
                   (c)    General Agreement as to Employee Benefit Coverage after
                          the Effective Time.   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  39
                   (d)    Specific Agreements as to Employee Benefit Coverage after
                          the Effective Time.   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  40
                   (f)    Retention Bonus Program.    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  43
                   (g)    Collective Bargaining Exception.    . . . . . . . . . . . . . . . . . . . . . . . . . . . .  44
                   (h)    Transferred Employees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  44

                                                            ARTICLE VI
                                                       CONDITIONS PRECEDENT

         6.1       Conditions to Each Party's Obligation to Effect the Merger   . . . . . . . . . . . . . . . . . . .  44
                   (a)    Camco Stockholder Approval  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  44
                   (b)    NYSE Listing  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  44
                   (c)    Other Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  44
                   (d)    S-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  45
                   (e)    No Injunctions or Restraints  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  45
                   (f)    Pooling Accounting  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  45
         6.2       Conditions of Obligations of STC and Sub   . . . . . . . . . . . . . . . . . . . . . . . . . . . .  45
                   (a)    Representations and Warranties  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  45
                   (b)    Performance of Obligations of Camco . . . . . . . . . . . . . . . . . . . . . . . . . . . .  46
                   (c)    Letters from Camco Directors and Executive Officers . . . . . . . . . . . . . . . . . . . .  46
                   (d)    Certifications and Opinion  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  46
                   (e)    Tax Opinion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  47
                   (f)    Transaction Agreement.    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  47
</TABLE>





                                     -iii-
<PAGE>   5
<TABLE>
         <S>       <C>                                                                                                 <C>
         6.3       Conditions of Obligations of Camco . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  47
                   (a)    Representations and Warranties  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  47
                   (b)    Performance of Obligations of STC and Sub . . . . . . . . . . . . . . . . . . . . . . . . .  48
                   (c)    Certifications and Opinion  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  48
                   (d)    Tax Opinion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  49
                   (e)    Fairness Opinion  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  49
                   (f)    Transaction Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  49

                                                           ARTICLE VII
                                                    TERMINATION AND AMENDMENT

         7.1       Termination  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  50
         7.2       Effect of Termination  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  51
         7.3       Amendment  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  52
         7.4       Extension; Waiver  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  52

                                                           ARTICLE VIII
                                                        GENERAL PROVISIONS

         8.1       Payment of Expenses  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  52
         8.2       Nonsurvival of Representations, Warranties and Agreements  . . . . . . . . . . . . . . . . . . . .  52
         8.3       Knowledge  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  53
         8.4       Notices  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  53
         8.5       Interpretation   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  54
         8.6       Counterparts   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  54
         8.7       Entire Agreement; No Third-Party Beneficiaries   . . . . . . . . . . . . . . . . . . . . . . . . .  54
         8.8       Governing Law  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  54
         8.9       No Remedy in Certain Circumstances   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  54
         8.10      Assignment   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  55
         8.11      Enforcement of the Agreement   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  55
</TABLE>





                                      -iv-
<PAGE>   6
                           GLOSSARY OF DEFINED TERMS

<TABLE>
<CAPTION>
Defined Term                                                                         Defined in Section
- ------------                                                                         ------------------

<S>                                                                                        <C>
Acquisition Proposal  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      4.2(a)
AICPA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      Recitals
Camco . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      Preamble
Camco Beneficiary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(l)(i)
Camco Benefit Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(l)(i)
Camco Common Stock  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      2.1
Camco Disclosure Letter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1
Camco ERISA Affiliate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(l)(ii)
Camco Intangible Property . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(n)
Camco Litigation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(j)
Camco Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(j)
Camco Permits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(i)
Camco Preferred Stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(b)
Camco Representatives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      4.2
Camco Retirees  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      5.14
Camco Right . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(b)
Camco SEC Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(d)
Camco Stock Option  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      5.5
Camco Stock Plans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(b)
CERCLA  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(o)(A)
Certificate of Merger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      1.1
Certificates  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      2.2(b)
Closing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      1.1
Closing Date  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      1.2
Code  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      Recitals
Confidentiality Agreements  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      5.1
Constituent Corporations  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      1.3(a)
Continuing Employees  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      5.14
Conversion Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      2.1(c)
Current Balance Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(k)
DGCL  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      1.1
Effective Time  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      1.1
Environmental Law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(o)
ERISA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(l)(i)
Exchange Act  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(c)(iii)
Exchange Agent  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      2.2(a)
Exchange Fund . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      2.2(a)
FASB  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      Recitals
Fractional Dividends  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      2.2(e)
GAAP  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(d)
</TABLE>





                                      -v-
<PAGE>   7
<TABLE>
<S>                                                                                        <C>
Governmental Entity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(c)(iii)
Hazardous Material  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(o)(B)
HSR Act . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(c)(iii)
Indemnified Liabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      5.6
Indemnified Parties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      5.6
Injunction  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      6.1(e)
IRS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(k)(ii)
Knowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      8.3
Material Adverse Effect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(a)
Merger  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      Recitals
Merger Agreement  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      Preamble
Notice of Superior Proposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      4.2(b)
NYSE  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.2(c)(iii)
OSHA  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(o)(A)
Pension Benefit Guaranty Corporation  . . . . . . . . . . . . . . . . . . . . . . . .      3.1(l)(iv)
Proxy Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(c)(iii)
Release . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(o)(C)
Remedial Action . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(o)(D)
Returns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(k)(i)
Rights Agreement  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(b)
S-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(e)
Schlumberger  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      Recitals
Schlumberger Common Stock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      2.1(c)
SEC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      Recitals
Securities Act  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(d)
Significant Subsidiary  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      4.1(g)
STC   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      Preamble
STC Affiliated Group  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      2.2(a)
STC Disclosure Letter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.2
STC Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      5.14
STC Litigation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.2(d)
Superior Proposal   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      4.2(c)
Surviving Corporation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      1.3(a)
Sub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      Preamble
Subsidiary  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      2.1(b)
Taxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(k)
Termination Fee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      7.2(b)
Transaction Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      6.2(f)
Voting Debt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .      3.1(b)
</TABLE>





                                      -vi-
<PAGE>   8
                          AGREEMENT AND PLAN OF MERGER

                 AGREEMENT AND PLAN OF MERGER, dated as of June 18, 1998 (this
"Merger Agreement"), among Schlumberger Technology Corporation, a Texas
corporation ("STC"), Schlumberger OFS, Inc., a Delaware corporation and a
wholly owned subsidiary of STC ("Sub"), and Camco International Inc., a
Delaware corporation ("Camco").

                 WHEREAS, the Boards of Directors of STC, Sub and Camco have
each approved the merger of Sub with and into Camco (the "Merger") upon the
terms and subject to the conditions of this Merger Agreement, thus enabling STC
to acquire all of the stock of Camco solely in exchange for voting stock of
Schlumberger Limited, a Netherlands Antilles corporation and the parent of STC
("Schlumberger");

                 WHEREAS, for federal income tax purposes, it is intended that
the Merger shall qualify as a reorganization within the meaning of Section
368(a)(1)(B) 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 under the requirements
of Opinion No. 16, Business Combinations, of the Accounting Principles Board of
the American Institute of Certified Public Accountants (the "AICPA"), as
amended by Statements of Financial Accounting Standards Board (the "FASB"), and
the related interpretations of the AICPA, FASB, the Emerging Issues Task Force,
and the rules and regulations of the U.S. Securities and Exchange Commission
(the "SEC"); and

                 WHEREAS, STC, Sub and Camco 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
conditions of this Merger Agreement and in accordance with the Delaware General
Corporation Law (the "DGCL"), Sub shall be merged with and into Camco 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
duly 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 after the closing of the Merger (the "Closing").





                                      -1-
<PAGE>   9
         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 Merger
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., 910 Louisiana,
Houston, Texas, 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 Camco, the separate existence of Sub shall
                          cease and Camco shall continue as the surviving
                          corporation (Sub and Camco are sometimes referred to
                          herein as the "Constituent Corporations" and Camco is
                          sometimes referred to herein as the "Surviving
                          Corporation") and the merger shall have such effects
                          as are set forth in Section 259 of the DGCL; (ii) the
                          Certificate of Incorporation of Camco shall be
                          amended to change Camco's authorized shares of
                          capital stock to 1,000 shares, par value $.001 per
                          share, of common stock, and so amended shall be the
                          Certificate of Incorporation of the Surviving
                          Corporation; and (iii) the Bylaws of Camco as in
                          effect immediately prior to the Effective Time shall
                          be the Bylaws of the Surviving Corporation.

                 (b)      The directors and officers of Sub at the Effective
                          Time shall, from and after the Effective Time, be the
                          directors and officers of the Surviving Corporation
                          and 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 Certificate of
                          Incorporation and Bylaws.

                                   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 Camco ("Camco Common Stock") or
capital stock of Sub:

                 (a)      Stock of  Sub. Each share of common stock, par value
                          $1.00 per share, of Sub issued and outstanding
                          immediately prior to the Effective Time will be
                          converted into one share of common stock, par value
                          $.001 per share, of the Surviving Corporation, and
                          the stock of the Surviving Corporation issued on that
                          conversion will constitute all of the issued and
                          outstanding shares of capital stock of the Surviving
                          Corporation.

                 (b)      Cancellation of Treasury Stock and Related Party
                          Stock.  Each share of Camco Common Stock and all
                          other shares of capital stock of Camco that are owned
                          by Camco as treasury stock and any shares of Camco
                          Common Stock





                                      -2-
<PAGE>   10
                          and all other shares of capital stock of Camco owned
                          in any case by STC, any entity controlling STC or any
                          wholly owned Subsidiary (as hereinafter defined) of
                          such entities or by any wholly owned Subsidiary of
                          Camco shall be canceled and retired and shall cease
                          to exist and no Schlumberger Common Stock or cash in
                          lieu of fractional shares shall be delivered or
                          deliverable in exchange therefor.  As used in this
                          Merger 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 Camco Common Stock.  Subject to
                          the provisions of Section 2.2(e) hereof, each share
                          of Camco 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, at the Effective Time and without the
                          requirement of any action by the holder thereof, be
                          exchanged for and converted into 1.18 (the
                          "Conversion Number") shares of voting common stock,
                          par value $.01 per share, of Schlumberger
                          ("Schlumberger Common Stock") to be delivered by Sub
                          pursuant to the Merger.  All references in this
                          Merger Agreement to the Camco Common Stock to be
                          received pursuant to the Merger shall be deemed to
                          include the Camco Stock Purchase Rights.  All such
                          shares of Camco Common Stock, when so exchanged and
                          converted, shall no longer 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 a certificate for the shares of Schlumberger
                          Common Stock and cash in lieu of fractional shares of
                          Schlumberger Common Stock as contemplated by Section
                          2.2(e), upon the surrender of such certificate for
                          shares of Camco Common Stock in accordance with
                          Section 2.2, without interest.

                 (d)      Conversion of Stock Options.  Each outstanding Camco
                          Stock Option (as defined in Section 5.5) shall be
                          converted as provided in Section 5.5.

                 (e)      Adjustment of Conversion Number.  If, subsequent to
                          the date of this Agreement but prior to the Effective
                          Time, the number of shares of Schlumberger Common
                          Stock issued and outstanding is changed as a result





                                      -3-
<PAGE>   11
                          of a stock split, reverse stock split, stock
                          dividend, recapitalization or other similar
                          transaction, the Conversion Number and other items
                          dependent thereon shall be appropriately adjusted
                          herein.

         2.2     Exchange of Certificates.

                 (a)      Exchange Agent.  As of the Effective Time, Sub shall
                          deposit with Boston EquiServe LP or such other bank
                          or trust company designated by STC or another member
                          of the STC Affiliated Group (as defined below) and
                          reasonably acceptable to Camco (the "Exchange
                          Agent"), for the benefit of the holders of shares of
                          Camco Common Stock, for exchange in accordance with
                          this Article II, through the Exchange Agent,
                          certificates representing the shares of Schlumberger
                          Common Stock (such shares of Schlumberger Common
                          Stock, together with any dividends or distributions
                          with respect thereto, and any cash deposits by STC in
                          order to make payments in lieu of fractional shares
                          or cash generated by sales of fractional shares of
                          Schlumberger Common Stock in the open market pursuant
                          to Section 2.2(e) being hereinafter collectively
                          referred to as the "Exchange Fund") issuable pursuant
                          to Section 2.1 in exchange for outstanding shares of
                          Camco Common Stock.  The Exchange Agent shall,
                          pursuant to irrevocable instructions, deliver the
                          Schlumberger 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.  As used in this Merger Agreement, "STC
                          Affiliated Group" means any entity controlling STC
                          and any direct or indirect Subsidiary of such entity
                          or of STC.

                 (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 Camco Common Stock (the "Certificates") (other
                          than Camco, STC, any entity controlling STC or any
                          wholly owned Subsidiaries of any such entities):  (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 STC or
                          a designated member of the STC Affiliated Group may
                          reasonably specify); and (ii) instructions for use in
                          effecting the surrender of the Certificates in
                          exchange for certificates representing shares of
                          Schlumberger Common Stock and any cash in lieu of a
                          fractional share of Schlumberger 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 STC or a designated member of the
                          STC Affiliated Group and reasonably acceptable to
                          Camco, together with such letter of transmittal, duly
                          executed, and any other required documents, the
                          holder of such Certificate shall be entitled to
                          receive in





                                      -4-
<PAGE>   12
                          exchange therefor a certificate representing that
                          number of whole shares of Schlumberger Common Stock
                          which such holder has the right to receive pursuant
                          to the provisions of this Article II and any cash in
                          lieu of fractional shares of Schlumberger 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
                          Camco Common Stock which is not registered in the
                          transfer records of Camco, a certificate representing
                          the appropriate number of shares of Schlumberger
                          Common Stock may be issued to a transferee if the
                          Certificate representing such Camco 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
                          Schlumberger Common Stock and cash in lieu of any
                          fractional shares of Schlumberger Common Stock as
                          contemplated by this Section 2.2  and all dividends
                          or other distributions thereon with a record date
                          after the Effective Time as contemplated by Section
                          2.2(c). The Exchange Agent shall not be entitled to
                          vote or exercise any rights of ownership with respect
                          to the Schlumberger 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 Shares Prior to
                          Exchange of Certificates.  No dividends or other
                          distributions with respect to Schlumberger 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 Schlumberger Common Stock represented
                          thereby as a result of the exchange and conversion
                          provided in Section 2.1(c), 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 Schlumberger
                          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 Schlumberger 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
                          Schlumberger Common Stock.





                                      -5-
<PAGE>   13
                 (d)      No Further Ownership Rights in Camco Common Stock.
                          All shares of Schlumberger Common Stock issued in
                          exchange for and upon the conversion of Camco 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 Camco 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 Camco on such shares of
                          Camco Common Stock in accordance with the terms of
                          this Merger Agreement or prior to the date hereof and
                          which remain unpaid at the Effective Time, and after
                          the Effective Time there shall be no further
                          registration of transfers on the stock transfer books
                          of the Surviving Corporation of the shares of Camco
                          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 Schlumberger Common
                          Stock shall be issued 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 Schlumberger.  In lieu of any
                          fractional security, STC shall pay or cause the
                          Exchange Agent to pay, to each holder of shares of
                          Camco Common Stock who would otherwise have been
                          entitled to a fraction of a share of Schlumberger
                          Common Stock pursuant to this Article II, an amount
                          in cash (without interest) equal to such holder's
                          proportionate interest in the sum of (i) the fraction
                          of a share of Schlumberger Common Stock to which such
                          holder would otherwise have been entitled, multiplied
                          by the closing sale price per share of Schlumberger
                          Common Stock on the New York Stock Exchange on the
                          last trading day immediately preceding the date of
                          the Effective Time, and (ii) the aggregate dividends
                          or other distributions that are payable with respect
                          to such shares of Schlumberger Common Stock pursuant
                          to Section 2.2(c) (such dividends and distributions
                          being herein called the "Fractional Dividends").  STC
                          shall timely make available to the Exchange Agent any
                          cash necessary to make payments in lieu of fractional
                          shares as aforesaid.  For purposes of determining
                          whether a holder of shares of Camco Common Stock is
                          to receive payment in lieu of fractional shares, all
                          shares of Camco Common Stock held of record by such
                          holder shall be aggregated.

                 (f)      Termination of Exchange Fund.  Any portion of the
                          Exchange Fund that remains undistributed to the
                          former stockholders of Camco for one year after the
                          Effective Time shall be delivered to STC upon demand,
                          and any





                                      -6-
<PAGE>   14
                          stockholders of Camco who have not theretofore
                          complied with this Article II shall thereafter look
                          only to STC for payment of their claim for
                          Schlumberger Common Stock or any cash in lieu of
                          fractional shares of Schlumberger Common Stock and to
                          Schlumberger for any dividends or distributions with
                          respect to Schlumberger Common Stock.

                 (g)      No Liability.  Neither Camco nor STC or any other
                          member of the STC Affiliated Group shall be liable to
                          any holder of shares of Camco Common Stock or
                          Schlumberger 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 Schlumberger 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 Camco.  Subject to the
exceptions set forth in the disclosure letter to be delivered to STC and Sub in
connection herewith (the "Camco Disclosure Letter"), Camco represents and
warrants to STC and Sub as follows:

                 (a)      Organization, Standing and Power.  Each of Camco 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 of incorporation or organization, has all
                          requisite corporate 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 where the failure to be so organized or so to
                          qualify (individually or in the aggregate) would not
                          have a Material Adverse Effect (as defined below) on
                          Camco.  Camco has heretofore delivered to STC
                          complete and correct copies of its Certificate of
                          Incorporation and Bylaws.  Except as set forth in the
                          exhibits to the Camco SEC Documents (as defined in
                          Section 3.1(d)), Camco does not own, directly or
                          indirectly, any capital stock or other ownership
                          interest in any Subsidiary which would be required to
                          be listed as a Subsidiary of Camco under the rules of
                          the SEC with the filing by Camco of an Annual Report
                          on Form 10-K.  As used in this Merger Agreement a
                          "Material Adverse Effect" shall mean any effect or
                          change that is or would be materially adverse to the
                          business, operations, assets, condition (financial or
                          otherwise) or results of operations of (i) in respect
                          of Camco, Camco and its direct and indirect
                          Subsidiaries, taken as a whole, and (ii) in respect
                          of the STC Affiliated Group, all the members of the
                          STC Affiliated Group taken as a whole; provided,
                          however, a Material Adverse Effect shall not include
                          (A) any effect or change, including changes in
                          national or international economic





                                      -7-
<PAGE>   15
                          conditions, relating to or affecting the oil and gas
                          service and equipment industry as a whole (including
                          a decline in worldwide oil and gas commodity prices),
                          (B) changes, or possible changes, in foreign,
                          Federal, state or local statutes and regulations, (C)
                          the loss of employees, customers or suppliers by
                          Camco or one or more of its Subsidiaries as a
                          consequence of any announcement relating to the
                          Merger or (D) any action taken or required to be
                          taken to satisfy any requirement imposed in
                          connection with the review of the Merger under the
                          HSR Act.

                 (b)      Capital Structure.  As of the date hereof, the
                          authorized capital stock of Camco consists of
                          100,000,000 shares of Camco Common Stock and
                          10,000,000 shares of preferred stock, par value $.01
                          per share ("Camco Preferred Stock").  One common
                          share purchase right (each, a "Camco Right") issued
                          pursuant to the Rights Agreement, dated as of
                          December 15, 1994, between Camco and First Chicago
                          Trust Company of New York, as rights agent, as
                          amended by the First Amendment to Rights Agreement,
                          dated as of October 21, 1997 (as so amended, the
                          "Rights Agreement"), is associated with each
                          outstanding share of Camco Common Stock.   At the
                          close of business on June 8, 1998: (i) 37,968,796
                          shares of Camco Common Stock and no shares of Camco
                          Preferred Stock were issued and outstanding, and an
                          aggregate of 2,054,358 shares of Camco Common Stock
                          and no shares of Camco Preferred Stock were reserved
                          for issuance by Camco pursuant to the following
                          plans:
<TABLE>
<CAPTION>
                                  Plan                                                        Shares Reserved
                                  ----                                                        ---------------
                          <S>                                                                        <C>
                          
                          The Camco 1997 Long-Term Incentive Plan                                    988,703
                          
                          The Camco 1993 Long-Term Incentive Plan                                    644,505

                          The Production Operators Corp. 1992 Long-Term
                                  Incentive Plan                                                     205,385
                          
                          The Production Operators Corp. 1980 Long-Term
                                  Incentive Plan                                                       2,600
                          
                          The 1996 Savings Related Share Option Scheme                                81,500
                          
                          The Camco Non-Employee Directors Stock Option
                                   Plan                                                              131,665
</TABLE>

                          (collectively, the "Camco Stock Plans"); (ii) 800,802
                          shares of Camco Common Stock were held by Camco 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 Camco stockholders may vote
                          ("Voting Debt") were issued or outstanding.  Except
                          as set forth on Schedule 3.1(b) to the Camco
                          Disclosure Letter, all





                                      -8-
<PAGE>   16
                          outstanding shares of Camco 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) to the Camco Disclosure Letter, all
                          outstanding shares of capital stock of the
                          Subsidiaries of Camco have been duly authorized and
                          validly issued and are fully paid and non-assessable
                          and were not issued in violation of any preemptive
                          rights or other preferential rights of subscription
                          or purchase other than those that have been waived or
                          otherwise cured or satisfied and all such shares are
                          owned by Camco, or a direct or indirect wholly owned
                          Subsidiary of Camco, 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) to the Camco Disclosure Letter
                          and except for changes since June 8, 1998 resulting
                          from the exercise of employee stock options granted
                          pursuant to, or from issuances or purchases under,
                          the Camco Stock Plans or as contemplated by this
                          Merger Agreement, there are outstanding: (i) no
                          shares of capital stock, Voting Debt or other voting
                          securities of Camco; (ii) no securities of Camco or
                          any Subsidiary of Camco convertible into or
                          exchangeable for shares of capital stock, Voting Debt
                          or other voting securities of Camco or any Subsidiary
                          of Camco; and (iii) no options, warrants, calls,
                          rights (including preemptive rights), commitments or
                          agreements to which Camco or any Subsidiary of Camco
                          is a party or by which it is bound in any case
                          obligating Camco or any Subsidiary of Camco 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 Camco or of
                          any Subsidiary of Camco, or obligating Camco or any
                          Subsidiary of Camco 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 Camco is a
                          party or by which it is bound relating to the voting
                          of any shares of the capital stock of Camco.  There
                          are no restrictions on Camco to vote the stock of any
                          of its Subsidiaries.

                 (c)      Authority; No Violations; Consents and Approvals.

                          (i)     The Board of Directors of Camco has approved
                 the Merger and this Merger Agreement, by vote of the directors
                 with no negative vote, and declared the Merger and this Merger
                 Agreement to be in the best interests of the stockholders of
                 Camco.  The directors of Camco have advised Camco and STC that
                 they intend to vote or cause to be voted all of the shares of
                 Camco Common Stock for which they have voting power in favor
                 of approval of the Merger and this Merger Agreement.  Camco
                 has all requisite corporate power and authority to enter into
                 this Merger Agreement and, subject, with respect to
                 consummation of the Merger, to approval of this Merger
                 Agreement and the Merger by the stockholders of Camco in
                 accordance





                                      -9-
<PAGE>   17
                 with the DGCL, to consummate the transactions contemplated
                 hereby.  The execution and delivery of this Merger Agreement
                 and the consummation of the transactions contemplated hereby
                 have been duly authorized by all necessary corporate action on
                 the part of Camco, subject, with respect to consummation of
                 the Merger, to approval of this Merger Agreement and the
                 Merger by the stockholders of Camco in accordance with the
                 DGCL.  This Merger Agreement has been duly executed and
                 delivered by Camco and, subject, with respect to consummation
                 of the Merger, to approval of this Merger Agreement and the
                 Merger by the stockholders of Camco in accordance with the
                 DGCL, and assuming this Merger Agreement constitutes the valid
                 and binding obligation of STC and Sub, constitutes a valid and
                 binding obligation of Camco enforceable in accordance with its
                 terms, subject, as to enforceability, to bankruptcy,
                 insolvency, reorganization and other laws of general
                 applicability relating to or effecting creditors' rights and
                 to general principles of equity and limitations imposed on
                 indemnity obligations by applicable federal and state
                 securities laws.

                          (ii)    Except as set forth on Schedule 3.1(c) to the
                 Camco Disclosure Letter, the execution and delivery of this
                 Merger 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 result in the creation of any
                 lien, security interest, charge or encumbrance upon any of the
                 properties or assets of Camco or any of its Subsidiaries
                 under, any provision of (A) the Certificate of Incorporation
                 or Bylaws of Camco or any provision of the comparable charter
                 or organizational documents of any of its Subsidiaries, (B)
                 any loan or credit agreement, note, bond, mortgage, indenture,
                 lease or other agreement, instrument, permit, concession,
                 franchise or license applicable to Camco or any of its
                 Subsidiaries or (C) assuming the consents, approvals,
                 authorizations or permits and filings or notifications
                 referred to in Schedule 3.1(c) to the Camco Disclosure Letter
                 and in subparagraph (iii) of this Section 3.1(c) are duly and
                 timely obtained or made and the approval of the Merger and
                 this Merger Agreement by the stockholders of Camco has been
                 obtained, any judgment, order, decree, statute, law,
                 ordinance, rule or regulation applicable to Camco or any of
                 its Subsidiaries or any of their respective properties or
                 assets, other than, in the case of clause (B) or (C), any such
                 conflicts, violations, defaults, rights, liens, security
                 interests, charges or encumbrances that, individually or in
                 the aggregate, would not have a Material Adverse Effect on
                 Camco, materially impair the ability of Camco to perform its
                 obligations hereunder or prevent in any material respect 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 U.S. or non-U.S. court, administrative agency or
                 commission or other governmental authority or instrumentality
                 (a





                                      -10-
<PAGE>   18
                 "Governmental Entity"), is required by or with respect to
                 Camco or any of its Subsidiaries in connection with the
                 execution and delivery of this Merger Agreement by Camco or
                 the consummation by Camco 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 Camco 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
                 filing with the SEC of (1) a proxy statement in preliminary
                 and definitive form relating to the meeting of Camco's
                 stockholders to be held in connection with the Merger (the
                 "Proxy Statement") and (2) 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 Merger Agreement and the transactions
                 contemplated hereby; (C) the filing of the Certificate of
                 Merger with the Secretary of State of the State of Delaware;
                 (D) such filings and approvals as may be required by any
                 applicable state securities, "blue sky" or takeover laws, or
                 environmental laws; (E) such filings and approvals as may be
                 required by any applicable non-U.S.  Governmental Entity; and
                 (F) such filings and approvals as may be required by any
                 non-U.S. premerger notification, securities, corporate or
                 other law, rule or regulation.

                 (d)      SEC Documents.  Camco has made available to STC a
                          true and complete copy of each report, schedule,
                          registration statement and definitive proxy statement
                          filed by Camco with the SEC since December 31, 1995
                          and prior to the date of this Merger Agreement (the
                          "Camco SEC Documents") which are all the documents
                          that Camco was required to file with the SEC since
                          such date.  As of their respective dates, the Camco
                          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 Camco SEC
                          Documents, and none of the Camco SEC Documents
                          contained when filed 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
                          under which they were made, not misleading.  The
                          consolidated financial statements of Camco included
                          in the Camco 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 year-end adjustments and other
                          adjustments discussed therein) the consolidated
                          financial position of Camco and its consolidated
                          Subsidiaries as of their respective dates and the
                          consolidated





                                      -11-
<PAGE>   19
                          results of operations and the consolidated cash flows
                          of Camco and its consolidated Subsidiaries for the
                          periods presented therein.

                 (e)      Information Supplied.  None of the information
                          supplied or to be supplied by Camco for inclusion or
                          incorporation by reference in the Registration
                          Statement on Form S-4 to be filed with the SEC in
                          connection with the issuance of shares of
                          Schlumberger Common Stock in the Merger (the "S-4")
                          will, at the time the S-4 is filed with the SEC or
                          when it becomes effective under the Securities Act,
                          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 Camco and included or
                          incorporated by reference in the Proxy Statement
                          will, at the date mailed to stockholders of Camco or
                          at the time of the meeting of such stockholders to be
                          held in connection with the Merger, 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 Camco or any
                          of its Subsidiaries, or with respect to other
                          information supplied by Camco 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 Camco.
                          The Proxy Statement, insofar as it relates to Camco
                          or its Subsidiaries or other information supplied by
                          Camco 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, except that no representations or
                          warranties are made by Camco with respect to
                          statements made or incorporated by reference therein
                          based on information supplied by any member of the
                          STC Affiliated Group.

                 (f)      Absence of Certain Changes or Events.  Except as
                          disclosed in, or reflected in the financial
                          statements included in, the Camco SEC Documents or on
                          Schedule 3.1(f) to the Camco Disclosure Letter, or
                          except as contemplated by this Merger Agreement,
                          since December 31, 1997, 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 Camco's capital
                          stock, except for regular quarterly cash dividends of
                          $.05 per share on Camco Common Stock; (ii) any
                          amendment of any material term of any outstanding
                          equity security of Camco or any Subsidiary; (iii) any
                          repurchase, redemption or other acquisition by Camco
                          or any Subsidiary of any outstanding shares of
                          capital stock or other equity securities of, or other
                          ownership interests in, Camco or any Subsidiary,
                          except as contemplated by Camco Benefit Plans;





                                      -12-
<PAGE>   20
                          (iv) any material change in any method of accounting
                          or accounting practice by Camco or any Subsidiary; or
                          (v) a Material Adverse Effect with respect to Camco.

                 (g)      No Undisclosed Material Liabilities.  Except as
                          disclosed in the Camco SEC Documents or on Schedule
                          3.1(g) to the Camco Disclosure Letter, there are no
                          liabilities of Camco or any of its Subsidiaries of
                          any kind whatsoever, whether accrued, contingent,
                          absolute, determined, determinable or otherwise, that
                          would have a Material Adverse Effect on Camco, other
                          than: (i) liabilities adequately provided for on the
                          balance sheet of Camco dated as of March 31, 1998
                          (including the notes thereto) contained in Camco's
                          Quarterly Report on Form 10-Q for the quarter ended
                          March 31, 1998; (ii) liabilities incurred in the
                          ordinary course of business since March 31, 1998;
                          (iii) liabilities under this Merger Agreement and the
                          Transaction Agreement; and (iv) except as disclosed
                          on Schedule 3.1(l)(i) to the Camco Disclosure Letter
                          and in Section 5.14(f).

                 (h)      No Default.  Neither Camco 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) in the case
                          of Camco and its Subsidiaries, their respective
                          charter and bylaws, (ii) except as disclosed in
                          Schedule 3.1(h) to the Camco Disclosure Letter, any
                          note, bond, mortgage, indenture, license, agreement
                          or other instrument or obligation to which Camco or
                          any of its Subsidiaries is now a party or by which
                          Camco 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 Camco 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 Camco.

                 (i)      Compliance with Applicable Laws.  Camco 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 "Camco
                          Permits"), except where the failure so to hold would
                          not have a Material Adverse Effect on Camco.  Camco
                          and its Subsidiaries are in compliance with the terms
                          of the Camco Permits, except where the failure so to
                          comply would not have a Material Adverse Effect on
                          Camco.  Except as disclosed in the Camco SEC
                          Documents or as set forth on Schedule 3.1(i), 3.1(k),
                          3.1(l), 3.1(m) or 3.1(o) to the Camco Disclosure
                          Letter, the businesses of Camco 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 Camco.  Except as set
                          forth on Schedule 3.1(i) to the Camco Disclosure
                          Letter, no investigation or review by any
                          Governmental Entity with respect





                                      -13-
<PAGE>   21
                          to Camco or any of its Subsidiaries is pending or, to
                          the best knowledge of Camco, threatened, other than
                          those the outcome of which would not have a Material
                          Adverse Effect on Camco.

                 (j)      Litigation.  Except as disclosed in the Camco SEC
                          Documents or in the Camco litigation report
                          previously delivered to STC, there is no (i) suit,
                          action or proceeding pending, or, to the best
                          knowledge of Camco, threatened against or effecting
                          Camco or any Subsidiary of Camco ("Camco
                          Litigation"), or (ii) judgment, decree, injunction,
                          rule or order of any Governmental Entity or
                          arbitrator outstanding against Camco or any
                          Subsidiary of Camco ("Camco Order"), that would (in
                          any case) have a Material Adverse Effect on Camco or
                          prevent Camco from consummating the transactions
                          contemplated by this Merger Agreement.

                 (k)      Taxes.

                          (i)     Except as set forth on Schedule 3.1(k)(i) to
                 the Camco Disclosure Letter, each of Camco, each of its
                 Subsidiaries and any affiliated, combined or unitary group of
                 which any such corporation is or was a member has (A) timely
                 (taking into account any extensions) filed in correct form all
                 federal and all material state, local and non-U.S. returns,
                 declarations, reports, estimates, information returns and
                 statements ("Returns") required to be filed by or with respect
                 to it in respect of any Taxes (as hereinafter defined), (B)
                 timely paid all Taxes that are due and payable (except for
                 audit adjustments which would not have a Material Adverse
                 Effect on Camco in the aggregate or to the extent that
                 liability therefor is reserved for in Camco's unaudited
                 balance sheet at March 31, 1998 included in the most recent
                 Quarterly Report on Form 10-Q of Camco (the "Current Balance
                 Sheet")) for which Camco or any of its Subsidiaries may be
                 liable, (C) established reserves which are included in the
                 Current Balance Sheet that are adequate for the payment of all
                 Taxes not yet due and payable with respect to the results of
                 operations of Camco and its Subsidiaries through the date of
                 such Current Balance Sheet, and (D) complied in all respects
                 with all applicable laws, rules and regulations relating to
                 the payment and withholding of Taxes and has in all respects
                 timely withheld from employee wages and paid over to the
                 proper governmental authorities all amounts required to be so
                 withheld and paid over, except where such failure to comply or
                 to withhold would not have a Material Adverse Effect on Camco.

                          (ii)    Schedule 3.1(k)(ii) to the Camco Disclosure
                 Letter sets forth the last taxable period through which the
                 federal income Tax Returns of Camco and any of its
                 Subsidiaries have been examined by the Internal Revenue
                 Service ("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 state, local or non-U.S. taxing authority have been
                 paid, fully settled or adequately provided for in the Current
                 Balance Sheet.  Except as adequately provided for in the





                                      -14-
<PAGE>   22
                 Camco SEC Documents or as set forth in Schedule 3.1(k)(ii) to
                 the Camco Disclosure Letter, no federal, state, local or
                 non-U.S. Tax audits or other administrative proceedings or
                 court proceedings are presently pending with regard to any
                 Taxes for which Camco or any of its Subsidiaries would be
                 liable, no deficiency for any such Taxes has been proposed,
                 asserted or assessed pursuant to any such examination against
                 Camco or any of its Subsidiaries by any federal, state, local
                 or non-U.S. taxing authority with respect to any period.

                          (iii)   Except as disclosed on Schedule 3.1(k)(iii)
                 to the Camco Disclosure Letter, neither Camco 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 other taxing authority (A) any
                 agreement or other document extending or having the effect of
                 extending the period for assessments or collection of any
                 Taxes for which Camco or any of its Subsidiaries would be
                 liable or (B) a closing agreement pursuant to Section 7121 of
                 the Code, or any predecessor provision thereof or any similar
                 provision of state, local or non-U.S. Tax law that relates to
                 the assets or operations of Camco or any of its Subsidiaries.

                          (iv)    Except as disclosed on Schedule 3.1(k)(iv) to
                 the Camco Disclosure Letter, there are no liens or security
                 interests on any of the assets of Camco or any of its
                 Subsidiaries that arose in connection with any failure or
                 alleged failure to pay any Tax other than for taxes which are
                 not yet delinquent.

                          (v)     Except as disclosed on Schedule 3.1(k)(v) to
                 the Camco Disclosure Letter, neither Camco nor any of its
                 Subsidiaries is a party to an agreement that provides for the
                 payment of any amount that would constitute a "parachute
                 payment" within the meaning of Section 280G of the Code.

                          (vi)    Neither Camco 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 Camco or any of its
                 Subsidiaries.

                          (vii)   Except as set forth in Camco SEC Documents or
                 as disclosed on Schedule 3.1(k)(vii) to the Camco Disclosure
                 Letter, neither Camco nor any of its Subsidiaries is a party
                 to, is bound by or has any obligation under any tax sharing
                 agreement, tax indemnity agreement or similar agreement or
                 arrangement.

                          (viii)  Except as disclosed on Schedule 3.1(k)(viii)
                 to the Camco Disclosure Letter, neither Camco nor any of its
                 Subsidiaries has any liability for Taxes under Treas. Reg.
                 Section  1.1502-6, or any similar provision of state, local or
                 non-U.S. law, except for Taxes of the affiliated group of
                 which Camco is the common parent corporation, within the
                 meaning of Section 1504(a)(1) of the Code or any similar
                 provision of state, local or non-U.S. law.





                                      -15-
<PAGE>   23
                          (ix)    Neither Camco nor any of its Subsidiaries has
                 participated in any international boycott within the meaning
                 of Section 999 of the Code.

                          (x)     Except as disclosed on Schedule 3.1(k)(x) to
                 the Camco Disclosure Letter and minor locations not material
                 to the business of Camco and its U.S. Subsidiaries, neither
                 Camco nor any of its Subsidiaries has had a permanent
                 establishment in any foreign country, as defined in any
                 applicable treaty or convention between the United States and
                 such foreign country.

                          (xi)    Neither Camco nor any of its Subsidiaries has
                 been a United States real property holding corporation within
                 the meaning of Section 897(c)(2) of the Code during the
                 applicable period specified in Section 897(c)(1)(A)(ii) of the
                 Code.

                 For purposes of this Merger Agreement, "Taxes" shall mean all
         federal, state, local, non-U.S. and 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)      Employee Matters; ERISA.

                          (i)     Benefit Plans. Schedule 3.1(l)(i) to the
                 Camco Disclosure Letter contains a true and complete list of
                 each of the following items:  each employee benefit plan,
                 program or arrangement covering any current or former officer,
                 director, employee or independent contractor of Camco (or any
                 of its Subsidiaries) or any of their dependents or
                 beneficiaries (each, a "Camco Beneficiary") including, but not
                 limited to, any "employee benefit plan" within the meaning of
                 Section 3(3) of the Employee Retirement Income Security Act of
                 1974, as amended ("ERISA"), whether or not terminated or
                 covered by ERISA, if Camco or any of its Subsidiaries could
                 have statutory or contractual liability with respect thereto
                 on or after the date hereof but excluding immaterial plans
                 maintained by Subsidiaries of Camco covering employees located
                 outside the United States where such plans cover fewer than
                 100 people. The items described above, together with each
                 management, employment, deferred compensation, severance,
                 change in control, bonus or other contract for personal
                 services with or covering any Camco Beneficiary, whether or
                 not terminated, if Camco or any of its Subsidiaries could have
                 statutory or contractual liability with respect thereto on or
                 after the date hereof, are referred to collectively herein as
                 the "Camco Benefit Plans."

                          (ii)    Contributions and Payments.  All material
                 contributions and other material payments required to have
                 been made by Camco or any entity required to be aggregated
                 therewith pursuant to Code Section 414 (a "Camco ERISA
                 Affiliate") with respect to any Camco Benefit Plan (or to any
                 person pursuant to the terms thereof) have been or will be
                 timely made and all such amounts properly accrued





                                      -16-
<PAGE>   24
                 through the date of this Merger Agreement have been reflected
                 in the financial statements of Camco included in the Camco SEC
                 Documents.

                          (iii)   Qualification; Compliance. Each Camco Benefit
                 Plan that is intended to be "qualified" within the meaning of
                 Code Section 401(a) has been determined by the IRS to be so
                 qualified or the applicable remedial period applicable to the
                 Plan will not have ended prior to the Effective Time, and, to
                 the best knowledge of Camco, no event or condition exists or
                 has occurred that would reasonably be expected to result in
                 the revocation or denial of any such determination which would
                 have a Material Adverse Effect on Camco.  With respect to each
                 Camco Benefit Plan, Camco and each Camco ERISA Affiliate are
                 in compliance with, and each Camco Benefit Plan and related
                 source of benefit payment is and has been operated in
                 compliance with, all applicable laws, rules and regulations
                 governing such plan or source, including, without limitation,
                 ERISA, the Code and applicable local law (including non-U.S.
                 law), except for violations that would not have a Material
                 Adverse Effect on Camco.  To the best knowledge of Camco,
                 except as set forth in Schedule 3.1(l)(iii), no Camco Benefit
                 Plan is subject to any ongoing audit, investigation, or other
                 administrative proceeding of the IRS, the Department of Labor,
                 or any other federal, state, or local governmental entity or
                 is scheduled to be subject to such an audit investigation or
                 proceeding.

                          (iv)    Liabilities.  With respect to the Camco
                 Benefit Plans, individually and in the aggregate, and, to the
                 best knowledge of Camco, there exists no condition or set of
                 circumstances that could subject Camco or any Camco ERISA
                 Affiliate to any liability arising under the Code, ERISA or
                 any other applicable law (including, without limitation, any
                 liability to or under any such plan or to the Pension Benefit
                 Guaranty Corporation ("PBGC"), or under any indemnity
                 agreement to which Camco or any Camco ERISA Affiliate is a
                 party), which liability, excluding liability for benefit
                 claims, funding obligations and PBGC insurance premiums, each
                 payable in the ordinary course, would have a Material Adverse
                 Effect on Camco.  No claim, action or litigation has been
                 made, commenced or, to the best knowledge of Camco,
                 threatened, by or against Camco or any of its Subsidiaries
                 with respect to any Camco Benefit Plan (other than for
                 benefits or PBGC premiums payable in the ordinary course) that
                 would have a Material Adverse Effect on Camco.

                          (v)     Retiree Welfare Plans.  Except as disclosed
                 in Schedule 3.1(l)(v) to the Camco Disclosure Letter, no Camco
                 Benefit Plan that is a "welfare plan" (within the meaning of
                 ERISA Section 3(1)) provides benefits for any retired or
                 former employees (other than as required pursuant to ERISA
                 Section 601).

                          (vi)    Payments Resulting from Merger.    Except as
                 disclosed on Schedules 3.1(k)(v), 3.1(l)(vi), 4.1(h) and 5.14
                 to the Camco Disclosure Letter, the consummation or
                 announcement of any transaction contemplated by this Merger
                 Agreement will not (either alone or upon the occurrence of any
                 additional or further





                                      -17-
<PAGE>   25
                 acts or events) result in (A) any payment (whether of
                 severance pay or otherwise) becoming due from the Company or
                 Camco or any of their Subsidiaries to any Camco Beneficiary or
                 to the trustee under any "rabbi trust" or similar arrangement,
                 or (B) any benefit under any Camco Benefit Plan being
                 established or increased, or becoming accelerated, vested or
                 payable.

                          (vii)   Funded Status of Plans.  Each Camco Benefit
                 Plan that is subject to either the minimum funding
                 requirements of ERISA Section 302 or to Title IV of ERISA has
                 assets that, as of the date hereof, have a fair market value
                 not less than the present value of the accrued benefit
                 obligations thereunder on a termination basis, as of the date
                 hereof, based on the actuarial methods, tables and assumptions
                 utilized by such plan's independent actuary in preparing such
                 plan's most recently prepared actuarial valuation report,
                 except to the extent that applicable law would require the use
                 of different actuarial assumptions if such plan was to be
                 terminated as of the date hereof, in which case those
                 different assumptions shall apply for purposes of this
                 representation.  Camco and its Subsidiaries have no unfunded
                 liabilities, as determined under local funding requirements,
                 with respect to any Camco Benefit Plans that cover such
                 non-U.S. employees which would, in the aggregate, have a
                 Material Adverse Effect on Camco.

                          (viii)  Multiemployer Plans. Except as described on
                 Schedule 3.1(l)(viii) to the Camco Disclosure Letter, no Camco
                 Benefit Plan is or was a "multiemployer plan" (within the
                 meaning of ERISA Section 4001(a)(3)), a multiple employer plan
                 described in Code Section 413(c), or a "multiple employer
                 welfare arrangement" (within the meaning of ERISA Section
                 3(40)).  Except as disclosed in Schedule 3.1(l)(viii) to the
                 Camco Disclosure Letter, neither Camco nor any Camco ERISA
                 Affiliate has been obligated to contribute to, or otherwise
                 has or has had any liability with respect to, any
                 multiemployer plan, multiple employer plan, or multiple
                 employer welfare arrangement.

                 (m)      Labor Matters.  Except as set forth in Schedule
                          3.1(m) to the Camco Disclosure Letter,

                          (i)     neither Camco nor any of its Subsidiaries is
                 a party to any collective bargaining agreement or other
                 current labor agreement with any labor union or organization,
                 and to the knowledge of Camco and its Subsidiaries there is no
                 current union representation dispute involving employees of
                 Camco or any of its Subsidiaries nor does Camco or any of its
                 Subsidiaries know of any activity or proceeding of any labor
                 organization (or representative thereof) or employee group (or
                 representative thereof) to organize any such employees;

                          (ii)    there is no unfair labor practice charge or
                 grievance arising out of a collective bargaining agreement or
                 other grievance procedure against Camco or any of its
                 Subsidiaries pending, or, to the knowledge of Camco or any of
                 its Subsidiaries, threatened, that has, or would have, a
                 Material Adverse Effect on Camco;





                                      -18-
<PAGE>   26
                          (iii)   there is no complaint, lawsuit or proceeding
                 in any forum by or on behalf of any present or former
                 employee, any applicant for employment or any classes of the
                 foregoing alleging breach of any express or implied contract
                 of employment, any law or regulation governing employment or
                 the termination thereof or other discriminatory, wrongful or
                 tortious conduct in connection with the employment
                 relationship against Camco or any of its Subsidiaries pending,
                 or, to the knowledge of Camco or any of its Subsidiaries,
                 threatened, that has, or would have, a Material Adverse Effect
                 on Camco;

                          (iv)    there is no strike, dispute, slowdown, work
                 stoppage or lockout pending, or, to the knowledge of Camco or
                 any of its Subsidiaries, threatened, ]against or involving
                 Camco or any of its Subsidiaries that has, or could have, a
                 Material Adverse Effect on Camco;

                          (v)     Camco and each of its Subsidiaries are in
                 compliance with all applicable laws respecting employment and
                 employment practices, terms and conditions of employment,
                 wages, hours of work and occupational safety and health,
                 except for non-compliance that does not have, and would not
                 have, a Material Adverse Effect on Camco; and

                          (vi)    there is no proceeding, claim, suit, action
                 or governmental investigation pending or, to the knowledge of
                 Camco or any of its Subsidiaries, threatened, in respect to
                 which any current or former director, officer, employee or
                 agent of Camco or any of its Subsidiaries is or may be
                 entitled to claim indemnification from Camco or any of its
                 Subsidiaries (A) pursuant to their respective charters or
                 bylaws, (B) as provided in any indemnification agreement to
                 which Camco or any Subsidiary of Camco is a party or (C)
                 pursuant to applicable law that has, or would have, a Material
                 Adverse Effect on Camco.

                 (n)      Intangible Property.  Camco and its Subsidiaries
                          possess or have adequate rights to use all
                          trademarks, trade names, patents, service marks,
                          brand marks, brand names, computer programs,
                          database, industrial designs, know how, trade
                          secrets, copyrights and other intellectual property
                          rights which are material to the condition or conduct
                          of the business operations of Camco and its
                          Subsidiaries (collectively, the "Camco Intangible
                          Property").  Except as set forth on Schedule 3.1(n)
                          to the Camco Disclosure Letter, all of the Camco
                          Intangible Property is owned by Camco or its
                          Subsidiaries free and clear of any and all liens,
                          claims or encumbrances, except those the failure to
                          so own would not have a Material Adverse Effect on
                          Camco.  To the knowledge of Camco, the operation of
                          the businesses of each of Camco or its Subsidiaries
                          does not, in any material respect, conflict with,
                          infringe upon, violate or





                                      -19-
<PAGE>   27
                          interfere with or constitute an appropriation of any
                          right, title, interest or goodwill, including,
                          without limitation, any intellectual property right,
                          trade secret, 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 in connection therewith and
                          neither Camco nor any of its Subsidiaries has
                          received any notice of any claim or otherwise knows
                          that any of the Camco Intangible Property is invalid
                          or conflicts with the 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 Camco Intangible Property and would
                          individually or in the aggregate result in a Material
                          Adverse Effect on Camco.  All failures of the
                          representations and warranties set forth in this
                          Section 3.1(n) to be true, in the aggregate, would
                          not result in a Material Adverse Effect on Camco.

                 (o)      Environmental Matters.

                 For purposes of this Merger Agreement:

                                  (A)      "Environmental Law" means any
                          applicable law regulating, prohibiting or requiring
                          the notification of Releases into any part of the
                          natural environment, pertaining to the protection of
                          natural resources, the environment and public and
                          employee health and safety, or governing or
                          regulating the use, storage, handling,
                          transportation, treatment, processing, disposal or
                          generation of any Hazardous Materials, 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.),
                          Emergency Planning and Community Right to Know Act
                          (42 U.S.C. Section 11001 et seq.), Safe Drinking
                          Water Act (Section 42 U.S.C.  Section 300 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 other such
                          applicable county, province, 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





                                      -20-
<PAGE>   28
                          governmental authority in the jurisdictions in which
                          the applicable party or its Subsidiaries conducts
                          business, or in 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,"
                          "pollutant," "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) investigate, 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) to the
                 Camco Disclosure Letter, the operations of Camco 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 have a Material Adverse Effect
                 on Camco;

                          (ii)    Except as disclosed on Schedule 3.1(o) to the
                 Camco Disclosure Letter, Camco 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 have a Material
                 Adverse Effect on Camco;

                          (iii)   Except as disclosed on Schedule 3.1(o) to the
                 Camco Disclosure Letter, Camco and its Subsidiaries are not
                 subject to any outstanding written orders, investigations 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 which would have a Material Adverse Effect on Camco;





                                      -21-
<PAGE>   29
                          (iv)    Except as disclosed on Schedule 3.1(o) to the
                 Camco Disclosure Letter, Camco 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 or liability attributable to the Release of
                 any Hazardous Material, which violations or liabilities,
                 individually or in the aggregate, would have a Material
                 Adverse Effect on Camco;

                          (v)     Except as disclosed on Schedule 3.1(o) to the
                 Camco Disclosure Letter, neither Camco nor any of its
                 Subsidiaries has any contingent liabilities in connection with
                 the Release of any Hazardous Material into the indoor or
                 outdoor environment (whether on-site or off-site) that,
                 individually or in the aggregate, would have a Material
                 Adverse Effect on Camco;

                          (vi)    Except as disclosed on Schedule 3.1(o) to the
                 Camco Disclosure Letter, the operations of Camco or its
                 Subsidiaries involving the generation, transportation,
                 treatment, storage or disposal of Hazardous Material or any
                 state equivalent are in compliance with applicable
                 Environmental Laws, except where the failure to so comply,
                 individually or in the aggregate, would not reasonably be
                 expected to have a Material Adverse Effect on Camco; and

                          (vii)   Except as disclosed on Schedule 3.1(o) to the
                 Camco Disclosure Letter, to the knowledge of Camco, there is
                 not now on or in any property of Camco 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), individually or in the aggregate, would have a
                 Material Adverse Effect on Camco.

                 (p)      Opinion of Financial Advisor.  Camco has received the
                          opinion of Morgan Stanley & Co.  Incorporated (a copy
                          of which has been delivered to STC) to the effect
                          that, as of the date hereof, the Conversion Number is
                          fair from a financial point of view to such holders.

                 (q)      State Takeover Statutes; Vote Required.  Camco has
                          taken all action to assure that no state takeover
                          statute or similar statute or regulation, including,
                          without limitation, Section 203 of the DGCL, shall
                          apply to the Merger or any of the other transactions
                          contemplated hereby.  The affirmative vote of the
                          holders of a majority of the outstanding shares of
                          Camco Common Stock is the only vote of the holders of
                          any class or series of Camco capital stock necessary
                          to approve this Merger Agreement and the transactions
                          contemplated hereby. Camco has taken such other
                          action with respect to any other anti-takeover
                          provisions in its Bylaws, Certificate of
                          Incorporation or the Rights Agreement to the extent
                          necessary to consummate the Merger on the terms set
                          forth in this Merger Agreement.





                                      -22-
<PAGE>   30
                 (r)      Accounting Matters.  To the best knowledge of Camco's
                          financial and accounting officers, prior to the date
                          hereof, neither Camco nor any of its Subsidiaries has
                          taken any action that (without giving effect to any
                          action taken or agreed to be taken by STC or any of
                          its Subsidiaries) would jeopardize the treatment of
                          the business combination to be effected by the Merger
                          as a pooling of interests for accounting purposes.

                 (s)      Beneficial Ownership of Schlumberger Common Stock.
                          As of the date hereof, assuming the accuracy of the
                          representation set forth in Section 3.2(b), neither
                          Camco 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
                          Schlumberger Common Stock.

                 (t)      Insurance.  Camco maintains insurance coverage
                          reasonably adequate for the operation of the business
                          of Camco 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.

                 (u)      Brokers.  Except as disclosed on Schedule 3.1(u) to
                          the Camco Disclosure Letter 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 Merger Agreement based upon arrangements made by
                          or on behalf of Camco.

                 (v)      Material Contracts and Agreements.  All material
                          contracts of Camco and its Subsidiaries have been
                          included in Camco SEC Documents unless not required
                          to be so included pursuant to the rules and
                          regulations of the SEC.  Schedule 3.1(v) to the Camco
                          Disclosure Letter sets forth a list of all written or
                          oral contracts, agreements or arrangements to which
                          Camco or any of its Subsidiaries or any of their
                          respective assets is bound which would be required to
                          be filed as exhibits to Camco's Annual Report on Form
                          10-K for the year ended December 31, 1997, or, based
                          on information currently available to Camco, are
                          expected to be required to be filed as an exhibit to
                          Camco's Annual Report on Form 10-K for the year ended
                          December 31, 1998.

                 (w)      Title to Properties.

                          (i)     Each of Camco and its Subsidiaries has good
                 and indefeasible title to, or valid leasehold interests in,
                 all its properties and assets purported to be owned by it in
                 the Camco SEC Documents, except for such as are no longer used
                 or useful in the conduct of its businesses or as have been
                 disposed of in the ordinary course of business, and except for
                 defects in title, easements, restrictive covenants and similar
                 encumbrances or impediments that, in the aggregate, do not and
                 will not materially





                                      -23-
<PAGE>   31
                 interfere with its ability to conduct its business as
                 currently conducted.  All such assets and properties, other
                 than assets and properties in which Camco or any of the
                 Subsidiaries has leasehold interests, are free and clear of
                 all liens, other than those set forth in the Camco SEC
                 Documents, and except for liens, that, in the aggregate, do
                 not and will not materially interfere with the ability of
                 Camco or any of its Subsidiaries to conduct business as
                 currently conducted.

                          (ii)    Except as would not have a Material Adverse
                 Effect on Camco, each of Camco and its Subsidiaries has
                 complied in all material respects with the terms of all leases
                 to which it is a party and under which it is in occupancy, and
                 all such leases are in full force and effect.  Each of Camco
                 and its Subsidiaries enjoys peaceful and undisturbed
                 possession under all such leases.

                 (x)      Amendment to the Camco Rights Agreement.  Camco has
                          amended the Rights Agreement so that none of the
                          execution and delivery of this Merger Agreement, the
                          conversion of shares of Camco Common Stock into the
                          right to receive Schlumberger Common Stock in
                          accordance with Article II of this Merger Agreement,
                          and the consummation of the Merger or any other
                          transaction contemplated hereby will cause (A) the
                          Camco Rights to become exercisable under the Rights
                          Agreement, (B) any member of the STC Affiliated Group
                          to be deemed an "Acquiring Person" (as defined in the
                          Rights Agreement), (C) the provisions of Section 11
                          or Section 13 to become applicable to any such event
                          or (D) the "Distribution Date" or the "Share
                          Acquisition Date" (each as defined in the Rights
                          Agreement) to occur upon any such event, and so that
                          the "Expiration Date" (as defined in the Rights
                          Agreement) of the Camco Rights will occur immediately
                          prior to the Effective Time.  Camco has delivered to
                          STC a true and complete copy of the Rights Agreement,
                          as amended to date.

         3.2     Representations and Warranties of STC and Sub.  Subject to the
exceptions set forth in the disclosure letter to be delivered to Camco in
connection herewith (the "STC Disclosure Letter"),  STC and Sub jointly and
severally represent and warrant to Camco as follows:

                 (a)      Organization, Standing and Power.  Each of STC and
                          Sub is a corporation duly organized, validly existing
                          and in good standing under the laws of its state of
                          incorporation or organization, has all requisite
                          corporate 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 to be so
                          organized or so to qualify (individually or in the
                          aggregate) would not have a Material Adverse Effect
                          on the STC Affiliated Group.





                                      -24-
<PAGE>   32
                 (b)      Capital Structure.  As of the date hereof, the
                          authorized capital stock of STC consists of 1,000
                          shares of common stock, par value $100 per share, 500
                          shares of which are validly issued, fully paid and
                          nonassessable, and are owned by Schlumberger and the
                          balance of which are not issued or outstanding.  As
                          of the date hereof, the authorized capital stock of
                          Sub consists of 10,000 shares of common stock, par
                          value $1.00 per share, 1,000 shares of which are
                          validly issued, fully paid and nonassessable, and are
                          owned by STC and the balance of which are not issued
                          or outstanding.  Sub was formed solely for the
                          purpose of participating in the Merger, has no assets
                          other than (i) that amount of cash which is required
                          for it to be organized as a corporation under the
                          DGCL and (ii) such shares of Schlumberger Common
                          Stock as are necessary to effect the transactions
                          contemplated hereby and has conducted no activities
                          to date, other than in connection with the Merger.

                 (c)      Authority; No Violations, Consents and Approvals.

                          (i)     Each of STC and Sub has all requisite
                 corporate power and authority to enter into this Merger
                 Agreement and to consummate the transactions contemplated
                 hereby.  The execution and delivery of this Merger Agreement
                 and the consummation of the transactions contemplated hereby
                 have been duly authorized by all necessary corporate action on
                 the part of STC and Sub.  This Merger Agreement has been duly
                 executed and delivered by STC and Sub.  Assuming this Merger
                 Agreement constitutes the valid and binding obligation of
                 Camco, it also constitutes a valid and binding obligation of
                 each of STC and Sub and is enforceable against each of them in
                 accordance with its terms; provided, however, that such
                 enforceability is subject to bankruptcy, insolvency,
                 reorganization and other laws of general applicability
                 relating to or affecting creditors' rights and to general
                 principles of equity and limitations imposed on indemnity
                 obligations by applicable federal and state securities laws.

                          (ii)    Except as set forth on Schedule 3.2(c)(ii) to
                 the STC Disclosure Letter, the execution and delivery of this
                 Merger 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 result in the creation of any
                 lien, security interest, charge or encumbrance upon any of the
                 properties or assets of STC or Sub under, any provision of (A)
                 the Certificate of Incorporation or Bylaws of STC or Sub, (B)
                 any loan or credit agreement, note, bond, mortgage, indenture,
                 lease or other agreement, instrument, permit, concession,
                 franchise or license applicable to STC or Sub or (C) 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,





                                      -25-
<PAGE>   33
                 any judgment, order, decree, statute, law, ordinance, rule or
                 regulation applicable to STC or Sub or any of properties or
                 assets, other than, in the case of clause (B) or (C), any such
                 conflicts, violations, defaults, rights, liens, security
                 interests, charges or encumbrances that, individually or in
                 the aggregate, would not have a Material Adverse Effect on the
                 STC Affiliated Group, materially impair the ability of STC or
                 Sub to perform its respective obligations hereunder or prevent
                 in any material respect 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 Governmental Entity is required by or with respect to
                 STC or any other member of the STC Affiliated Group in
                 connection with the execution and delivery of this Merger
                 Agreement by STC and Sub or the consummation by STC and Sub of
                 the transactions contemplated hereby, as to which the failure
                 to obtain or make would have a Material Adverse Effect on the
                 STC Affiliated Group, except for: (A) the filing of a
                 premerger notification report 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 Merger 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 New York Stock Exchange, Inc. (the "NYSE"); (E) such
                 filings and approvals as may be required by any applicable
                 state securities, "blue sky" or takeover laws or environmental
                 laws; (F) such filings and approvals as may be required by any
                 applicable non-U.S. Governmental Entity; and (G) such filings
                 and approvals as may be required by any non-U.S. premerger
                 notification, securities, corporate or other law, rule or
                 regulation.

                 (d)      Litigation.  Except as disclosed on Schedule 3.2(d)
                          to the STC Disclosure Letter, there is no (i) suit,
                          action or proceeding pending, or, to the best
                          knowledge of STC, threatened against or affecting any
                          member of the STC Affiliated Group ("STC
                          Litigation"), or (ii) judgment, decree, injunction,
                          rule or order of any Governmental Entity or
                          arbitrator outstanding against STC or any Subsidiary
                          of STC, that would (in any case) have a Material
                          Adverse Effect on the STC Affiliated Group or prevent
                          STC or Sub from consummating the transactions
                          contemplated by this Merger Agreement.

                 (e)      Accounting Matters.  To the best knowledge of STC's
                          financial and accounting officers, prior to the date
                          hereof, no member of the STC Affiliated Group has
                          taken any action that (without giving effect to any
                          action taken or agreed to be taken by Camco or any of
                          its Subsidiaries) would jeopardize the treatment of
                          the business combination to be effected by the Merger
                          as a pooling of interests for accounting purposes.





                                      -26-
<PAGE>   34
                 (f)      Beneficial Ownership of Camco Common Stock.  As of
                          the date hereof,  neither STC nor any member of the
                          STC Affiliated Group "beneficially owns" (as defined
                          in Rule 13d-3 under the Exchange Act) any shares of
                          Camco Common Stock.

                 (g)      Transaction Agreement.  The representations and
                          warranties made by any member of the STC Affiliated
                          Group which is a party to the Transaction Agreement
                          are true and correct in all material respects as set
                          forth therein.

                 (h)      No Other Consideration for Camco Common Stock.
                          Neither STC nor any member of the STC Affiliated
                          Group (i) owns any stock of Camco, (ii) has
                          previously owned any stock of Camco, except for stock
                          (if any) which was subsequently disposed of to
                          unrelated parties, (iii) has any plan or intention to
                          acquire any stock of Camco, other than as provided
                          herein, or (iv) has agreed to pay, will pay or will
                          cause to be paid any consideration (whether material
                          or immaterial) for shares of Camco capital stock
                          other than the shares of Schlumberger Common Stock
                          described herein and any payments in lieu of
                          fractional shares described in Section 2.2(e), which
                          consideration could cause the Merger to fail to
                          qualify as a reorganization under Section
                          368(a)(1)(B) of the Code.

                                   ARTICLE IV
               COVENANTS RELATING TO CONDUCT OF BUSINESS OF CAMCO

         4.1     Conduct of Business by Camco Pending the Merger.  During the
period from the date of this Merger Agreement and continuing until the
Effective Time, Camco agrees as to itself and its Subsidiaries that (except as
expressly contemplated or permitted by this Merger Agreement, or to the extent
that STC shall otherwise consent in writing):

                 (a)      Ordinary Course.  Except as provided on Schedule
                          4.1(a) to the Camco Disclosure Letter, each of Camco
                          and its Subsidiaries shall carry on its businesses in
                          the usual, regular and ordinary course in
                          substantially the same manner as heretofore conducted
                          and, to the extent consistent therewith, 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, in each
                          case consistent with past practices, to the end that
                          its goodwill and ongoing business shall not be
                          impaired in any material respect to the fullest
                          extent reasonably possible at the Effective Time.

                 (b)      Dividends; Changes in Stock.  Except as provided on
                          Schedule 4.1(b) to the Camco Disclosure Letter, Camco
                          shall not and it shall not permit any of its
                          Subsidiaries to: (i) declare or pay any dividends on
                          or make other





                                      -27-
<PAGE>   35
                          distributions in respect of any of its capital stock
                          or partnership interests, except for the declaration
                          and payment of regular quarterly cash dividends not
                          in excess of $.05 per share of Camco Common Stock and
                          dividends from a Subsidiary of Camco to Camco or
                          another Subsidiary of Camco and except for cash
                          distributions paid on or with respect to partnership
                          interests of a Subsidiary of Camco; (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 Camco capital stock; or
                          (iii) repurchase, redeem or otherwise acquire, or
                          permit any of its Subsidiaries to purchase, redeem or
                          otherwise acquire, any shares of Camco's 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) to the Camco Disclosure Letter, Camco
                          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 Camco Common Stock upon the
                          exercise of stock options granted under the Camco
                          Stock Plans 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
                          Camco Stock Plans; 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, Camco shall not amend or
                          propose to amend its Certificate of Incorporation or
                          Bylaws.

                 (e)      No Acquisitions.  Except for proposed acquisitions
                          listed on Schedule 4.1(e) to the Camco Disclosure
                          Letter, Camco 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
                          involving the payment of consideration in excess of
                          $5 million in the aggregate without the prior written
                          consent of STC.

                 (f)      No Dispositions.  Other than: (i) dispositions or
                          proposed dispositions listed on Schedule 4.1(f) to
                          the Camco Disclosure Letter; (ii) as may be necessary
                          or required by law to consummate the transactions
                          contemplated hereby; (iii) sales or leases in the
                          ordinary course of business consistent with past
                          practice or (iv) other dispositions not aggregating
                          more than $5 million, Camco shall not and it shall
                          not permit any of its Subsidiaries to sell, lease,
                          encumber or





                                      -28-
<PAGE>   36
                          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 without the prior written consent of STC.

                 (g)      No Dissolution, Etc.  Except as otherwise permitted
                          or contemplated by this Merger Agreement, Camco shall
                          not authorize, recommend, propose or announce an
                          intention to adopt a plan of complete or partial
                          liquidation or dissolution of Camco or any of its
                          Subsidiaries that would constitute a "significant
                          subsidiary" within the meaning of Rule 1.02 of
                          Regulation S-X promulgated under the Securities Act
                          (a "Significant Subsidiary").

                 (h)      Certain Employee Matters.  Except as set forth on
                          Schedules 3.1(k)(v), 3.1(l)(i), 3.1(l)(vi) and 4.1(h)
                          to the Camco Disclosure Letter and in Section 5.14
                          or as may be required by applicable law or any
                          agreement to which Camco or any Camco ERISA Affiliate
                          is a party on the date hereof or as expressly
                          contemplated by this Merger Agreement Camco shall
                          not, nor shall it permit any Camco ERISA Affiliate
                          to:

                          (i)     amend, or increase the amount of (or
                                  accelerate the payment or vesting of) any
                                  benefit or amount payable under, any employee
                                  benefit plan or any other contract,
                                  agreement, commitment, arrangement, plan or
                                  policy providing for compensation or benefits
                                  to any current or former director, officer,
                                  employee or independent contractor who would
                                  be deemed to be an employee under applicable
                                  guidelines published by the IRS, and
                                  maintained by, contributed to or entered into
                                  by, Camco or any Camco ERISA Affiliate,
                                  including, without limitation, the existing
                                  Camco Benefit Plans;

                          (ii)    increase (or enter into any contract,
                                  agreement, commitment or arrangement to
                                  increase in any manner) the compensation or
                                  fringe benefits, or otherwise to extend,
                                  expand or enhance the engagement, employment
                                  or any related rights, of any current or
                                  former director, officer, employee or
                                  independent contractor who would be deemed to
                                  be an employee under applicable guidelines
                                  published by the IRS, of Camco or any Camco
                                  ERISA Affiliate, except increases in the
                                  ordinary course of business consistent with
                                  past practice;

                          (iii)   adopt, establish or implement any plan,
                                  policy or other arrangement providing for any
                                  form of benefits or other compensation to any
                                  current or former director, officer, employee
                                  or independent contractor who would be deemed
                                  to be an employee under applicable guidelines
                                  published by the IRS, of Camco or any Camco
                                  ERISA Affiliate;





                                      -29-
<PAGE>   37
                          (iv)    enter into or amend any employment agreement,
                                  severance agreement, or other contract,
                                  agreement or arrangement with any current or
                                  former director, officer, employee or
                                  independent contractor who would be deemed to
                                  be an employee under applicable guidelines
                                  published by the IRS, of Camco or any Camco
                                  ERISA Affiliate; or

                          (v)     pay or agree to pay any pension, retirement
                                  allowance or other benefit not required or
                                  contemplated by any of the existing Camco
                                  Benefit Plans as in effect on the date of
                                  this Merger Agreement to any current or
                                  former director, officer, employee or
                                  independent contractor who would be deemed to
                                  be an employee under applicable guidelines
                                  published by the IRS, of Camco or any Camco
                                  ERISA Affiliate.

                 (i)      Indebtedness; Leases; Capital Expenditures.  Except
                          as set forth on Schedule 4.1(i) to the Camco
                          Disclosure Letter, Camco shall not, nor shall Camco
                          permit any of its Subsidiaries to, (A) incur any
                          indebtedness for borrowed money (except for working
                          capital under Camco'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 Camco or any
                          of its Subsidiaries or guarantee any debt securities
                          of others if the aggregate amount of all such
                          indebtedness incurred or guaranteed exceeds $25
                          million, (B) 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 Camco or any of its
                          Subsidiaries in connection with any indebtedness
                          thereof, except for those securing purchase money
                          indebtedness or (C) commit to aggregate capital
                          expenditures in excess of $25 million outside the
                          capital budget, as approved by Camco prior to the
                          date hereof and disclosed on Schedule 4.1(i) to the
                          Camco Disclosure Letter.

                 (j)      Taxes.  Neither Camco nor any of its Subsidiaries
                          shall make any material election relating to Taxes or
                          compromise any material Tax liability.

                 (k)      Accounting.  Neither Camco nor any of its
                          Subsidiaries shall change any material accounting
                          principle used by it, except as required by
                          statement, rules or regulations promulgated by the
                          FASB or the SEC.

         4.2     No Solicitation.

                 (a)      Camco will not, and will not authorize or permit any
                          of its officers, directors, agents and other
                          representatives or those of any of its Subsidiaries
                          (collectively, "Camco Representatives") to, and will
                          not authorize any





                                      -30-
<PAGE>   38
                          employee of Camco or any of its Subsidiaries to and
                          on becoming aware of will take all reasonable actions
                          to stop the employee from continuing to, directly or
                          indirectly, solicit or initiate or encourage
                          (including by way of furnishing information) any
                          prospective buyer or the making of any proposal that
                          constitutes, or may reasonably be expected to lead
                          to, an Acquisition Proposal (as defined herein) from
                          any person, or engage in any discussions or
                          negotiations relating thereto or accept any
                          Acquisition Proposal; provided, however, that,
                          notwithstanding any other provision of this Merger
                          Agreement, Camco may, prior to the vote of the
                          stockholders of Camco for approval of the Merger, but
                          not thereafter if the Merger is approved thereby, in
                          response and only in response to a written request
                          made without any solicitation, initiation,
                          encouragement, discussion or negotiation by Camco or
                          any Camco Representatives, furnish information
                          concerning Camco to any person or "group" (within the
                          meaning of Section 13(d)(3) of the Exchange Act)
                          pursuant to a confidentiality agreement on
                          substantiality the same terms (provided that the
                          Camco Board of Directors may, if required by its
                          fiduciary duties, permit an offer to be received from
                          such group in accordance with the terms of such
                          confidentiality agreement) as the Confidentiality
                          Agreements between Camco and STC described in Section
                          5.1 hereof, provided that the Board of Directors of
                          Camco shall conclude in good faith on the basis of
                          the written advice of outside counsel to Camco that
                          such action is necessary in order for the Board of
                          Directors of Camco to act in a manner that is
                          consistent with its fiduciary obligations under
                          applicable law.  Camco shall immediately cease and
                          cause to be terminated any existing solicitation,
                          initiation, encouragement, activity, discussion or
                          negotiation with any parties conducted heretofore by
                          Camco or any Camco Representatives with respect to
                          any Acquisition Proposal existing on the date hereof.
                          Camco will promptly notify STC of the pendency of any
                          negotiations respecting, or the receipt of, any
                          Acquisition Proposal.  It is understood that any
                          violation of this Section 4.2 by Camco or any Camco
                          Representative shall be deemed a material breach of
                          this Merger Agreement by Camco. As used in this
                          Merger Agreement, "Acquisition Proposal" shall mean
                          any proposal or offer, other than a proposal or offer
                          by STC or another  member of the STC Affiliated
                          Group, for a tender or exchange offer, a merger,
                          consolidation or other business combination involving
                          Camco or any Significant Subsidiary of Camco or any
                          proposal to acquire in any manner a substantial (15%
                          or more) equity interest in, or substantially all of
                          the assets of, Camco or any of its Significant
                          Subsidiaries.

                 (b)      Neither the Board of Directors of Camco nor any
                          committee thereof shall, except in connection with
                          the termination of this Merger Agreement pursuant to
                          Section 7.1(a), (b) or (d), (i) withdraw or modify,
                          or propose to withdraw or modify, in a manner adverse
                          to Schlumberger or STC, the approval or
                          recommendation by the Board of Directors of Camco or
                          any such committee





                                      -31-
<PAGE>   39
                          of this Merger Agreement or the Merger, or take any
                          action having such effect, or (ii) approve or
                          recommend, or propose to approve or recommend, any
                          Acquisition Proposal.  Notwithstanding the foregoing,
                          in the event the Board of Directors of Camco receives
                          an Acquisition Proposal that, in the exercise of its
                          fiduciary obligations (as determined in good faith by
                          a majority of the disinterested members thereof based
                          on the advice of outside counsel), it determines to
                          be a Superior Proposal, the Board of Directors may
                          withdraw or modify its approval or recommendation of
                          this Merger Agreement or the Merger and may (subject
                          to the following sentence) terminate this Merger
                          Agreement, in each case at any time after midnight on
                          the second business day following STC's receipt of
                          written notice (a "Notice of Superior Proposal")
                          advising STC that the Board of Directors has received
                          an Acquisition Proposal which it has determined to be
                          a Superior Proposal, specifying the material terms
                          and conditions of such Superior Proposal (including
                          the proposed financing for such proposal and a copy
                          of any documents conveying such proposal) and
                          identifying the party making such Superior Proposal.
                          Camco may terminate this Merger Agreement pursuant to
                          the preceding sentence only if the stockholders of
                          Camco shall not yet have voted upon the Merger and
                          Camco shall have paid to STC the Termination Fee (as
                          defined in Section 7.2(b)).  Any of the foregoing to
                          the contrary notwithstanding, Camco may engage in
                          discussions with any party that has made an
                          unsolicited takeover proposal for the limited purpose
                          of determining whether such proposal (as opposed to
                          any further negotiated proposal) is a Superior
                          Proposal.  Nothing contained herein shall prohibit
                          Camco from taking and disclosing to its stockholders
                          a position contemplated by Rule 14e-2(a) following
                          STC's receipt of a Notice of Superior Proposal.

                 (c)      For purposes of this Merger Agreement, a "Superior
                          Proposal" means any bona fide proposal to acquire,
                          directly or indirectly, all of the Camco Common Stock
                          then outstanding or all or substantially all of the
                          assets of Camco and its Subsidiaries, and otherwise
                          on terms which a majority of the disinterested
                          members of the Board of Directors of Camco determines
                          in its good faith reasonable judgment (based on the
                          written advice of a financial advisor of national
                          recognized reputation, a copy of which shall be
                          provided to STC) to be more favorable to Camco's
                          stockholders than the Merger.  In reaching such good
                          faith determination, the Board of Directors of Camco
                          will give significant consideration to whether an
                          Acquisition Proposal includes definite financing.

         4.3     Pooling of Interests.  If so requested by STC, Camco shall,
and shall cause its independent accountants and other representatives to, fully
cooperate with STC, its independent accountants and other representatives in
seeking to obtain confirmation from the SEC that the Merger may be accounted
for as a "pooling of interests."





                                      -32-
<PAGE>   40
                                   ARTICLE V
                             ADDITIONAL AGREEMENTS

         5.1     Access to Information.  Subject to the provisions of Section
5.3, upon reasonable notice, Camco shall afford to the officers, employees,
accountants, counsel and other representatives of STC, access, during normal
business hours during the period prior to the Effective Time, to all its
properties, books, contracts, commitments and records and, during such period,
Camco shall furnish promptly to STC or a designated member of the STC
Affiliated Group (a) a copy of each report, schedule, registration statement
and other document filed or received by it during such period purs uant to SEC
requirements and (b) all other information concerning its business, properties
and personnel as STC or the other members of the STC Affiliated Group may
reasonably request.  Upon reasonable notice, STC shall provide the officers,
employees, accountants, counsel and other representatives of Camco such
information and materials concerning STC and the other members of the STC
Affiliated Group as is reasonably necessary for Camco to complete its due
diligence with respect to this Merger Agreement and the Transaction Agreement.
Camco agrees that neither Camco nor any of its Subsidiaries or any
representatives of any of the foregoing entities will use any information
obtained pursuant to this Section 5.1 for any purpose unrelated to the
consummation of the transactions contemplated by this Merger Agreement and the
Transaction Agreement.  STC agrees that no member of the STC Affiliated Group,
or any representative of any member of the STC Affiliated Group will use any
information obtained pursuant to this Section 5.1 for any purpose unrelated to
the consummation of the transactions contemplated by this Merger Agreement and
the Transaction Agreement.  Notwithstanding the foregoing, neither Camco nor
STC shall be required to give the other party any information that is subject
to a confidentiality agreement and that relates primarily to a party other than
Camco and its subsidiaries on the one hand or a member of the STC Affiliated
Group on the other.  The Confidentiality Agreements dated as of May 11, 1998
between STC and Camco (the "Confidentiality Agreements") shall apply with
respect to information furnished thereunder or hereunder and any other
activities contemplated thereby.

         5.2     Camco Stockholders' Meeting.  Camco 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 Merger Agreement and the Merger.  Subject
to Sections 4.2(a) and (b), Camco 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 Merger Agreement and the Merger by its stockholders.  Camco shall use
all reasonable efforts to hold such meeting as soon as practicable after the
date upon which the S-4 becomes effective.

         5.3     Legal Conditions to Merger.

                 (i)      Except as otherwise provided herein, each of Camco,
                          STC and Sub will take all reasonable actions
                          necessary to comply promptly with all legal
                          requirements that may be imposed on such party with
                          respect to the Merger (including, without limitation,
                          furnishing all information required under the HSR Act
                          and in connection with approvals of or filings with
                          any other Governmental Entity) and will promptly
                          cooperate with and furnish





                                      -33-
<PAGE>   41
                          information to each other in connection with any such
                          requirements imposed upon any of them or any of their
                          Subsidiaries in connection with the Merger.  Each of
                          Camco and STC will, and will cause its respective
                          Subsidiaries to, take all actions necessary to obtain
                          (and will cooperate with each other in obtaining) any
                          consent, acquiescence, authorization, order or
                          approval of, or any exemption or nonopposition by,
                          any Governmental Entity or court required to be
                          obtained or made by Camco, STC or any of their
                          Subsidiaries in connection with the Merger or the
                          taking of any action contemplated thereby or by this
                          Merger Agreement, including complying with any
                          requests or orders made by the Justice Department or
                          the Federal Trade Commission in connection with the
                          Merger.

                 (ii)     Each of the parties hereto shall file a premerger
                          notification and report form under the HSR Act with
                          respect to the Merger as promptly as reasonably
                          possible following execution and delivery of this
                          Agreement.  Each of the parties agrees to use
                          reasonable efforts to promptly respond to any request
                          for additional information pursuant to Section (e)(1)
                          of the HSR Act.  Except as otherwise required by
                          United States regulatory considerations, Camco will
                          furnish to STC copies of all correspondence, filings
                          or communications (or memoranda setting forth the
                          substance thereof (collectively, "Company HSR
                          Documents")) between Camco, or any of its respective
                          representatives, on the one hand, and any
                          governmental entity, or members of the staff of such
                          agency or authority, on the other hand, with respect
                          to this Agreement or the Merger; provided; however,
                          that (x) with respect to documents and other
                          materials filed by or on behalf of Camco with the
                          Antitrust Division of the Department of Justice, the
                          Federal Trade Commission, or any state attorneys
                          general that are available for review by STC, copies
                          will not be required to be provided to STC and (y)
                          with respect to any Camco HSR Documents (1) that
                          contain any information which, in the reasonable
                          judgment of Fulbright & Jaworski L.L.P., should not
                          be furnished to STC because of antitrust
                          considerations or (2) relating to a request for
                          additional information pursuant to Section (e)(1) of
                          the HSR Act, the obligation of Camco to furnish any
                          such Camco HSR Documents to STC shall be satisfied by
                          the delivery of such Camco HSR Documents on a
                          confidential basis to Baker & Botts, L.L.P., pursuant
                          to a confidentiality agreement in form and substance
                          reasonably satisfactory to STC.  Except as otherwise
                          required by United States regulatory considerations,
                          STC will furnish to Camco copies of all
                          correspondence, filings or communications (or
                          memoranda setting forth the substance thereof
                          (collectively, "STC HSR Documents")) between STC or
                          any of its representatives, on the one hand, and any
                          Governmental Entity, or member of the staff of such
                          agency or authority, on the other hand, and any
                          Governmental Entity, or member of the staff of such
                          agency or authority, on the other hand, with respect
                          to this Agreement or the Merger; provided, however,
                          that (x) with respect to documents and other
                          materials filed by or





                                      -34-
<PAGE>   42
                          on behalf of STC with the Antitrust Division of the
                          Department of Justice, the Federal Trade Commission,
                          or any state attorneys general that are available for
                          review by Camco, copies will not be required to be
                          provided to Camco, and (y) with respect to any STC
                          HSR Documents (1) that contain information which, in
                          the reasonable judgment of Baker & Botts, L.L.P.,
                          should not be furnished to Camco because of antitrust
                          considerations or (2) relating to a request for
                          additional information pursuant to Section (e)(1) of
                          the HSR Act, the obligation of STC to furnish any
                          such STC HSR Documents to Camco shall be satisfied by
                          the delivery of such STC HSR Documents on a
                          confidential basis to Fulbright & Jaworski L.L.P.
                          pursuant to a confidentiality agreement in form and
                          substance reasonably satisfactory to Camco.

                 (iii)    In the event that any governmental body with
                          jurisdiction of this Merger shall require any member
                          of the STC Affiliated Group to agree to take or not
                          to take any action as a condition to approving or not
                          objecting to the Merger, STC will take such action
                          (A) if the loss in annual revenues to the Surviving
                          Corporation would reasonably be expected not to
                          exceed $75 million during the ensuing twelve months
                          following the Closing, or (B) if STC otherwise
                          considers it reasonable and appropriate in the
                          circumstances to take such action.

         5.4     Agreements of Others.  No later than five days prior to the
day on which the meeting of stockholders of Camco to approve the Merger is
held, Camco shall use its best efforts to cause each person who STC reasonably
believes to be an affiliate of Camco within the meaning of Rule 145 of the
General Rules and Regulations of the SEC under the Securities Act, after
consultation with Camco and its legal counsel, to deliver (a) a written
agreement, in the form to be approved by STC and Camco, that such persons will
not sell, pledge, transfer or otherwise dispose of any shares of Schlumberger
Common Stock issued to such persons pursuant to the Merger or any other shares
of Schlumberger Common Stock that such persons control the disposition of,
except pursuant to an effective registration statement or in compliance with
Rule 145 or an exemption from the registration requirements of the Securities
Act and (b) a written agreement, in the form to be approved by STC and Camco,
that such persons will not sell or in any other way reduce his or her risk
relative to any shares of Schlumberger 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.

         5.5     Stock Options.  At the Effective Time, each outstanding option
to purchase Camco Common Stock and any stock appreciation rights related
thereto that has been granted pursuant to the Camco Stock Plans ("Camco Stock
Option"), whether vested or unvested, shall be deemed to constitute an option
to acquire, on the same terms and conditions as were applicable under such
Camco Stock Option, a number of shares of Schlumberger Common Stock equal to
the number of





                                      -35-
<PAGE>   43
shares of Camco Common Stock purchasable pursuant to such Camco Stock Option
multiplied by the Conversion Number, at a price per share equal to the
per-share exercise price for the shares of Camco Common Stock purchasable
pursuant to such Camco Stock Option divided by the Conversion Number; provided,
however, that in the case of any Camco Stock Option to which Code Section 421
applies by reason of its qualification under any of the Code Sections 422-424,
the exercise price and number of shares subject to such option shall be
determined in a manner that meets the requirements for issuing or assuming a
stock option in a transaction to which Code Section 424(a) applies and provided
further, that the number of shares of Schlumberger Common Stock that may be
purchased upon exercise of such Camco Stock Option shall not include any
fractional share and, upon exercise of such Camco Stock Option, a cash payment
shall be made for any fractional share based upon the closing price of a share
of Schlumberger Common Stock on the NYSE on the last trading day of the
calendar month immediately preceding the date of exercise.

         5.6     Indemnification; Directors' and Officers' Insurance.

                 (a)      Camco shall, and from and after the Effective Time,
                          STC 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 Camco or any of its Subsidiaries or an
                          employee of Camco or any of its Subsidiaries who acts
                          as a fiduciary under any Camco Benefit 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
                          Camco 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 (including
                          arising out of or relating to the Merger, the
                          consummation of the transactions contemplated herein,
                          and any action taken in connection therewith)
                          ("Indemnified Liabilities").  Any Indemnified Party
                          wishing to claim indemnification under this Section
                          5.6, upon learning of any such claim, action, suit,
                          proceeding or investigation, shall notify Camco (or
                          after the Effective Time, STC 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 5.6, 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.





                                      -36-
<PAGE>   44
                 (b)      STC shall use its reasonable best efforts to purchase
                          and maintain in effect for the benefit of the
                          Indemnified Parties for a period of six years after
                          the Effective Time, directors' and officers'
                          liability insurance 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 than that maintained by Camco and
                          its Subsidiaries as of the date of this Merger
                          Agreement with respect to matters arising before the
                          Effective Time, provided that STC shall not be
                          required to pay an annual premium for such insurance
                          in excess of two times the last annual premium paid
                          by Camco prior to the date hereof, but in such case
                          shall purchase as much coverage as possible for such
                          amount.

                 (c)      All rights to indemnification for acts or omissions
                          occurring prior to the Effective Time now existing in
                          favor of the Indemnified Parties as provided in the
                          Certificate of Incorporation or by-laws of Camco or
                          its subsidiaries and in any indemnification
                          agreements to which they are parties shall survive
                          the Merger, and the Surviving Corporation shall
                          continue such indemnification rights for acts or
                          omissions prior to the Effective Time in full force
                          and effect in accordance with their terms and STC
                          shall be financially responsible therefor.  The
                          provisions of this Section 5.6 are intended to be for
                          the benefit of, and shall be enforceable by, the
                          parties hereto and each Indemnified Party, and his or
                          her heirs and representatives.

         5.7     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.

         5.8     Accounting Matters.  During the period from the date of this
Merger Agreement through the Effective Time, unless the parties shall otherwise
agree in writing, neither STC nor Camco or any of their respective Subsidiaries
shall take or fail to take any reasonable action which action or failure to act
would knowingly jeopardize the treatment of Camco's combination with Sub as a
pooling of interests for accounting purposes and each of STC and Camco will
take all reasonable steps to permit the Merger to be treated as a pooling of
interest for accounting purposes.

         5.9     Public Announcements.  STC and Camco will agree with each
other with respect to the contents thereof before issuing any press release or
otherwise making any public statements with respect to the transactions
contemplated by this Merger Agreement, 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.

         5.10    Other Actions.  Except as contemplated by this Merger
Agreement, neither STC nor Camco shall, and shall not permit any of its
Subsidiaries to, take or agree or commit to take any





                                      -37-
<PAGE>   45
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.

         5.11    Advice of Changes; SEC Filings.  STC and Camco 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 the STC Affiliated Group or Camco, as the case may be.  Camco and STC
shall promptly provide each other (or their respective counsel) copies of all
filings made by such party (or in the case of STC, made by Schlumberger) with
the SEC or any other state or federal Governmental Entity in connection with
this Merger Agreement and the transactions contemplated hereby.

         5.12    Reorganization  It is the intention of STC and Camco that the
Merger will qualify as a reorganization described in Section 368(a)(1)(B) of
the Code (and any comparable provisions of applicable state law).  Neither
Camco nor STC (or 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.

         5.13    Delivery of Schlumberger Common Stock.  Prior to the Merger,
STC will acquire and will contribute to Sub that number of shares of
Schlumberger Common Stock which Sub is required to deliver pursuant to Section
2.1(c).

         5.14    Employee Matters.

                 (a)      Employment.  STC and Camco agree that all employees
                          of Camco and its Subsidiaries immediately prior to
                          the Effective Time shall be employed by the Surviving
                          Corporation immediately after the Effective Time
                          (referred to herein during such continuing employment
                          as "Continuing Employees").

                 (b)      Benefits Accrued at the Effective Time.  STC will
                          take, or cause the appropriate member of the STC
                          Group (as defined below) to take, all actions
                          necessary to preserve and maintain with respect to
                          the Camco Benefit Plans in effect at the Effective
                          Time, benefits accrued and service credit accrued to
                          the Continuing Employees and the Camco Retirees
                          during employment with Camco and its Subsidiaries
                          prior to the Effective Time; provided, however, that
                          unless otherwise expressly provided in this
                          Agreement, nothing contained in this Section 5.14
                          shall preclude any member of the STC Group from
                          amending any such plan to cease the accrual of
                          benefits thereunder after the Effective Time or
                          terminating any such plan provided such amendment or
                          termination does not adversely affect the benefits
                          accrued thereunder, if any, at the Effective Time.
                          As used herein, the "STC Group" means the Surviving
                          Corporation and all members of the STC Affiliated
                          Group.





                                      -38-
<PAGE>   46
                 (c)      General Agreement as to Employee Benefit Coverage
                          after the Effective Time.  Unless otherwise expressly
                          addressed in this Section 5.14, this Section 5.14(c)
                          shall govern the obligations of the STC Group with
                          respect to employee benefits for Continuing Employees
                          and for employees who are eligible for retirement
                          benefits attributable to employment with Camco or a
                          Camco Affiliate, whether before, at or after the
                          Effective Time (referred to herein as "Camco
                          Retirees").

                          (i)     Benefit Coverage.  STC will take, and cause
                                  the appropriate member of the STC Group to
                                  take, such actions as are necessary so that
                                  for the remainder of the calendar year in
                                  which the Effective Time occurs, Continuing
                                  Employees and Camco Retirees will be provided
                                  with employee benefit plans, programs,
                                  policies and arrangements that are no less
                                  favorable to such employees and retirees as
                                  those provided as of the Effective Time.
                                  Thereafter, the STC Group will provide the
                                  Continuing Employees and Camco Retirees with
                                  benefits that, in the aggregate, are not less
                                  favorable than those then provided to
                                  Similarly Situated Employees (as defined in
                                  the next sentence).  As used herein, the
                                  phrase "Similarly Situated Employees" means
                                  that group of employees (or retirees, as
                                  applicable) of the STC Group principally
                                  employed in the oil field service operations
                                  of the STC Group generally whose job
                                  descriptions, working conditions, wage rates
                                  and other conditions of employment are (or
                                  were) the most similar to those of the
                                  Continuing Employees (or the Camco Retirees)
                                  or, if there is no such group of employees, a
                                  group of employees engaged in the drilling or
                                  completing of oil and/or gas wells, all as
                                  reasonably determined by STC.

                          (ii)    Service Crediting.  In the event a STC Group
                                  employee benefit plan, program, policy or
                                  arrangement is made available to Continuing
                                  Employees or Camco Retirees, all periods of
                                  service with Camco and its Subsidiaries and
                                  any other entity that is within the same
                                  controlled group as Camco under Section
                                  414(b), (c), (m) or (o) of the Code or
                                  Section 4001 of ERISA (the "Camco Controlled
                                  Group"), will be credited to such employees
                                  or retirees for all purposes (other than
                                  accrual of benefits), including vesting and
                                  the eligibility to participate and receive
                                  benefits for which a specified period of
                                  service is required under such STC Group
                                  employee benefit plan, program, policy or
                                  arrangement.

                          (iii)   Certain Welfare Plan Provisions.  STC will
                                  take, or cause the appropriate member of the
                                  STC Group to take, such actions as are
                                  necessary so that Continuing Employees and
                                  Camco Retirees shall not be subject to
                                  preexisting condition exclusions or waiting
                                  periods





                                      -39-
<PAGE>   47
                                  for welfare benefit plan coverages (except to
                                  the extent so subject prior to the Effective
                                  Time) under any STC Group welfare benefit
                                  plan that is made available to them and shall
                                  receive full credit for any copayments and
                                  deductibles already incurred under the
                                  comparable plan of Camco and its Subsidiaries
                                  during the applicable plan year in which the
                                  Effective Time occurs.

                 (d)      Specific Agreements as to Employee Benefit Coverage
                          after the Effective Time. The following provisions
                          shall modify the obligations of the STC Group under
                          Section 5.14(c) to the extent set forth below.

                          (i)     Severance Policies or Plans.  For the period
                                  commencing on the Effective Time and ending
                                  on December 31, 1999, a Continuing Employee
                                  who is not a party to an individual agreement
                                  providing for the payment of severance
                                  benefits shall be provided with continued
                                  coverage under the Camco Benefit Plan
                                  providing for severance benefit coverage to
                                  the Continuing Employee at the Effective Time
                                  or, if any member of the STC Group maintains
                                  a severance plan that would otherwise cover
                                  the Continuing Employee by its terms and such
                                  plan would provide greater benefits to the
                                  Continuing Employee, the employee instead
                                  shall be provided with coverage under such
                                  superior STC Group severance plan while
                                  eligible for such plan during the period
                                  commencing on the Effective Time and ending
                                  on December 31, 1999.  From and after January
                                  1, 2000, for as long as the STC Group
                                  maintains a severance plan for its Similarly
                                  Situated Employees, a Continuing Employee who
                                  is not a party to an individual severance
                                  agreement shall be provided with coverage
                                  under the STC Group severance plan.
                                  Continuing Employees will accrue severance
                                  plan credit at the same rate as Similarly
                                  Situated Employees and, for this purpose,
                                  years of service with the Camco Controlled
                                  Group prior to the Effective Time will be
                                  credited.

                          (ii)    Management and Sales Incentive Compensation
                                  Programs.  The following provisions shall
                                  apply to those Camco Benefit Plans  that
                                  provide for management and sales incentive
                                  compensation and that are in effect at the
                                  Effective Time.  In the event that a
                                  participant in an incentive compensation
                                  program ceases to be an employee for any
                                  reason other than termination for cause or
                                  voluntary resignation, or in the event that a
                                  participant is reassigned to a business unit
                                  which is no longer within the Camco incentive
                                  compensation measurements, the participant
                                  will receive an incentive compensation
                                  payment as measured against the plan at the
                                  end of the prior quarter and based on an
                                  annual award prorated for the fraction of the
                                  year up to the change in employment status.
                                  In the event that a reorganization results in
                                  a





                                      -40-
<PAGE>   48
                                  business unit being removed from the Camco
                                  incentive compensation measurements, the
                                  measurements of the plan will be adjusted to
                                  eliminate the objectives of that business
                                  unit from the performance evaluation for
                                  calculation of incentive compensation
                                  payments for the remaining business units.
                                  Voluntary resignation shall not include
                                  termination under Section 2(a) of a Camco
                                  Executive Severance Agreement.

                          (iii)   Qualified Defined Contribution Plans.  No
                                  Camco Benefit Plan that is a qualified
                                  defined contribution pension plan shall be
                                  terminated in a manner that would generate a
                                  distributable event to a participant (unless
                                  the corresponding plan(s) maintained by the
                                  STC Group for Similarly Situated Employees
                                  are also so terminated).  The STC Group may
                                  make employer contributions under qualified
                                  defined contribution plans for Continuing
                                  Employees at a rate or level that differ from
                                  the contributions made under such plans for
                                  Similarly Situated Employees based on the
                                  relative profits of the STC Group operating
                                  unit or division employing Continuing
                                  Employees as compared to the profits of the
                                  STC Group operating unit or division
                                  employing Similarly Situated Employees.

                          (iv)    Qualified Defined Benefit Plans.

                                        (A)     Freeze of Benefit Accruals.
                                  Benefit accruals by a participant in any
                                  Camco Benefit Plan that is a qualified
                                  defined benefit pension plan (a "Camco
                                  Defined Benefit Plan") may be frozen by a
                                  member of the STC Group at any time on or
                                  after the close of the calendar year in which
                                  the Effective Time occurs, provided that the
                                  definition for compensation includes covered
                                  earnings up to the date the plan is frozen
                                  and further provided that Continuing
                                  Employees then commence accruing a benefit
                                  under a qualified defined benefit pension
                                  plan sponsored by a member of the STC Group
                                  (a "STC Group Defined Benefit Plan") if
                                  Similarly Situated Employees are then
                                  accruing a benefit under such a plan.  An ad
                                  hoc benefit adjustment shall be made to the
                                  frozen benefit attributable to the Camco
                                  Defined Benefit Plan to the extent such an
                                  adjustment is made under a STC Group Defined
                                  Benefit Plan.

                                        (B)     Service Crediting.  In the
                                  event that the benefit accrual of a
                                  Continuing Employee under a Camco Defined
                                  Benefit Plan is frozen, or a Camco Defined
                                  Benefit Plan is merged into a STC Group
                                  Defined Benefit Plan, the following service
                                  crediting provisions (in addition to any
                                  service crediting provisions of Section
                                  5.14(c) that are not inconsistent with this
                                  paragraph) shall apply to any benefit





                                      -41-
<PAGE>   49
                                  accrued after the Effective Time under such
                                  STC Group Defined Benefit Plan: Continuing
                                  Employees will be credited with service equal
                                  to the employees' accrued vesting service
                                  under the Camco Defined Benefit Plan for
                                  periods prior to the Effective Time, for
                                  purposes of vesting, eligibility to
                                  participate, eligibility for enhanced levels
                                  of benefit accrual and eligibility for early
                                  retirement.

                                        (C)     Early Retirement.
                                  Notwithstanding the foregoing, the early
                                  retirement provisions of the Camco Defined
                                  Benefit Plan that is merged into a STC Group
                                  Defined Benefit Plan or under which the
                                  accrued benefit of a Continuing Employee is
                                  frozen shall continue to apply to the benefit
                                  accrued under the provisions of the Camco
                                  Defined Benefit Plan rather than the early
                                  retirement provisions of the STC Group
                                  Defined Benefit Plan.  To the extent that a
                                  Continuing Employee commences receipt of an
                                  early retirement benefit under a STC Group
                                  Defined Benefit Plan prior to the time that
                                  the benefit accrued under a Camco Defined
                                  Benefit Plan would be payable, the benefit
                                  accrued under the Camco Defined Benefit Plan
                                  shall nevertheless commence being paid at the
                                  same time as the benefit under the STC Group
                                  Defined Benefit Plan, but shall be
                                  actuarially reduced to reflect such early
                                  commencement.

                          (v)     Retiree Medical Coverage.  For so long as the
                                  STC Group provides retiree medical coverage
                                  to its eligible retiring Similarly Situated
                                  Employees, retiree medical coverage under a
                                  Camco Benefit Plan or a plan maintained by a
                                  member of the STC Group shall be made
                                  available to eligible Camco Retirees.  The
                                  STC Group may impose eligibility criteria of
                                  attainment of age 60 during employment with
                                  20 years of service  (within the meaning of
                                  the vesting service definition of the Camco
                                  Benefit Plan that is a qualified defined
                                  benefit pension plan and that covers the
                                  employee at the Effective Time) for such
                                  coverage, but no more restrictive eligibility
                                  criteria unless such more restrictive
                                  criteria also applies to Similarly Situated
                                  Employees.  However, a Continuing Employee
                                  who, at the Effective Time, is age 55 and has
                                  accrued 15 or more years of service shall be
                                  eligible, upon an involuntary termination of
                                  employment entitling the employee to benefits
                                  under a STC Group or Camco severance plan or
                                  agreement, for the same retiree medical
                                  coverage provided to other Camco Retirees,
                                  notwithstanding the age and service
                                  eligibility criteria otherwise applicable for
                                  retiree medical coverage.  Camco Retirees may
                                  be required to pay premiums for retiree
                                  medical coverage up to, but not in excess of,
                                  the highest premium permitted to be charged
                                  for such continuation coverage under the
                                  Consolidated Omnibus Budget





                                      -42-
<PAGE>   50
                                  Reconciliation Act of 1986 unless higher
                                  premiums also are required from Similarly
                                  Situated Employees who retire.

                          (vii)   U.K. Performance Related Pay (PRP) Plans.
                                  Camco Benefit Plans that are PRP plans will
                                  not be discontinued prior to the close of the
                                  calendar year in which the Effective Time
                                  occurs.

                          (viii)  Health Care and Dependent Care Flexible
                                  Spending Accounts.  Camco Benefit Plans that
                                  are flexible spending accounts within the
                                  meaning of Code Section 125 and the
                                  regulations thereunder will not be
                                  discontinued prior to the close of the
                                  calendar year in which the Effective Time
                                  occurs.

                 (e)      Vacation.  With respect to the calendar year in which
                          the Effective Time occurs, a Continuing Employee will
                          be permitted to take vacation after the Effective
                          Time (in accordance with the STC Group vacation
                          policies generally applicable to Similarly Situated
                          Employees) for accrued and unused vacation days
                          (determined under the vacation policies of Camco)
                          that such Continuing Employee is entitled to use for
                          the calendar year in which the Effective Time occurs.
                          Continuing Employees shall receive pay in lieu of
                          such unused vacation time at the end of the calendar
                          year in which the Effective Time occurs.  In
                          addition, with respect to vacation time that is
                          earned during the calendar year in which the
                          Effective Time occurs (which may be taken in the
                          subsequent calendar year under the vacation policies
                          of Camco) (the "Vacation Accrual"), the Vacation
                          Accrual shall, on the first day of such subsequent
                          calendar year, be credited to the Continuing
                          Employees' vacation credit accounts under the
                          applicable STC Group vacation policy for the calendar
                          year following the Effective Time, up to the maximum
                          allowed under the vacation policies of the STC Group,
                          and the Continuing Employees will be paid for any
                          Vacation Accrual in excess of such maximum.
                          Continuing Employees will, in addition to having
                          their Vacation Accrual credited as of the first day
                          of the calendar year following the Effective Time,
                          accrue vacation time for calendar years commencing on
                          and after the Effective Time at the same rate as
                          Similarly Situated Employees and, for this purpose,
                          years of service with the Camco Controlled Group
                          prior to the Effective Time will be credited.
                          Notwithstanding the foregoing, the total vacation
                          time credited to a Continuing Employee's vacation
                          credit account for the calendar year following the
                          Effective Time (both by the Vacation Accrual credit
                          made at the beginning of the year and vacation
                          accrued thereafter) shall not exceed the maximum
                          allowed under the applicable vacation policies of the
                          STC Group.

                 (f)      Retention Bonus Program.  Notwithstanding the
                          provisions of Section 4.1(h), STC agrees that Camco
                          may establish a retention bonus program for the





                                      -43-
<PAGE>   51
                          benefit of certain named Continuing Employees
                          ("Eligible Employees"), subject to the following
                          limitations:  The number of Eligible Employees shall
                          not exceed 100.  The total amount of retention
                          bonuses potentially payable under the program shall
                          not exceed $5 million.  A retention bonus will only
                          be paid to an Eligible Employee who remains in the
                          employ of the STC Group until the first to occur of
                          (i) the first anniversary of the Effective Time or
                          (ii) the date such Eligible Employee's employment is
                          involuntarily terminated other than for cause by any
                          member of the STC Group.  Documentation of the
                          program (including the names and titles of the
                          Eligible Employees and the amount of the retention
                          bonus potentially payable to each Eligible Employee)
                          shall be subject to the comment and advance approval
                          of STC, which approval shall not unreasonably be
                          withheld.

                 (g)      Collective Bargaining Exception.  The provisions of
                          this Section 5.14 will not apply to Continuing
                          Employees or Camco Retirees who are covered by a
                          collective bargaining agreement to the extent such
                          provisions are inconsistent with the terms of any
                          applicable collective bargaining agreement.

                 (h)      Transferred Employees. A Continuing Employee who is
                          transferred after the Effective Time to employment
                          with an operating unit, subsidiary or affiliate of
                          the STC Group other than the Surviving Corporation or
                          any of its subsidiaries shall participate in the
                          employee benefit plans, programs, policies and
                          arrangements that are maintained by said employing
                          entity for its employees.


                                   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)      Camco Stockholder Approval.  This Merger 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 Camco Common Stock
                          entitled to vote thereon.

                 (b)      NYSE Listing.  The shares of Schlumberger Common
                          Stock issuable to Camco stockholders pursuant to this
                          Merger Agreement 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





                                      -44-
<PAGE>   52
                          filings required to be made prior to the Effective
                          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
                          Merger Agreement and the consummation of the
                          transactions contemplated hereby 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 the STC
                          Affiliated Group (assuming the Merger has taken
                          place) or to materially adversely affect the
                          consummation of the Merger.

                 (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 5.7 hereof and, in
                          addition, shall use all reasonable efforts to have
                          any such decree, ruling, injunction or order vacated,
                          except as otherwise contemplated by this Merger
                          Agreement.

                 (f)      Pooling Accounting.  Camco and STC or a designated
                          member of the STC Affiliated Group shall have
                          received a letter from each of Arthur Andersen LLP
                          and Price Waterhouse LLP, dated as of a date within
                          two days prior to the Closing Date, in form and
                          substance satisfactory to the respective receiving
                          persons, to the effect that, in accordance with
                          generally accepted accounting principles and the
                          applicable rules and regulations of the SEC,
                          Schlumberger and Camco are each eligible to be a
                          party to a Merger accounted for as a "pooling of
                          interests".

         6.2     Conditions of Obligations of STC and Sub.  The obligations of
STC 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
STC.

                 (a)      Representations and Warranties.  Each of the
                          representations and warranties of Camco set forth in
                          this Merger Agreement shall be true and correct in
                          all material respects as of the date of this Merger
                          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 thresholds otherwise contained
                          in Section 3.1 hereof) would not have a Material
                          Adverse Effect on Camco (such that the aggregate of
                          the





                                      -45-
<PAGE>   53
                          Material Adverse Effect on Camco hereunder exceeds
                          $200 million) and STC shall have received a
                          certificate dated the Closing Date on behalf of Camco
                          by the chief executive officer and chief financial
                          officer of Camco to that effect.

                 (b)      Performance of Obligations of Camco.  Camco shall
                          have performed in all material respects all
                          obligations required to be performed by it under this
                          Merger Agreement at or prior to the Closing Date.

                 (c)      Letters from Camco Directors and Executive Officers.
                          STC shall have received from each director and
                          executive officer of Camco an executed copy of each
                          of the agreements described in Section 5.4.

                 (d)      Certifications and Opinion.  Camco shall have
                          furnished STC with:

                          (i)     a certified copy of a resolution or
                 resolutions duly adopted by the Board of Directors of Camco
                 approving this Merger Agreement and consummation of the Merger
                 and the transactions contemplated hereby and directing the
                 submission of the Merger to a vote of the stockholders of
                 Camco;

                          (ii)    a certified copy of a resolution or
                 resolutions duly adopted by the holders of a majority of the
                 outstanding shares of Camco Common Stock approving the Merger
                 and the transactions contemplated hereby;

                          (iii)   a favorable opinion, dated the Closing Date,
                 in customary form and substance, of Ronald R. Randall,
                 Esquire, General Counsel of Camco, dated the Closing Date to
                 the effect that:

                                  (A)      Camco is a corporation duly
                          incorporated, validly existing and in good standing
                          under the laws of the State of Delaware and has
                          corporate power to own its properties and assets and
                          to carry on its business as presently conducted and
                          as described in the Registration Statement;

                                  (B)      Camco has the requisite corporate
                          power to effect the Merger as contemplated by this
                          Merger Agreement; the execution and delivery of this
                          Merger Agreement did not, and the consummation of the
                          Merger will not, violate any provision of Camco's
                          Certificate of Incorporation or Bylaws; and upon the
                          filing by the Surviving Corporation of the
                          Certificate of Merger, the Merger shall become
                          effective;

                                  (C)      Each of Camco's Significant
                          Subsidiaries is a corporation duly incorporated,
                          validly existing and in good standing under the laws
                          of its jurisdiction of incorporation, and has
                          corporate power to own its properties and assets and
                          to carry on its business as presently conducted; and





                                      -46-
<PAGE>   54
                                  (D)      The Board of Directors of Camco has
                          taken all action required by the DGCL and its
                          Certificate of Incorporation or its Bylaws to approve
                          the Merger and to authorize the execution and
                          delivery of this Merger Agreement and the
                          transactions contemplated hereby; the Board of
                          Directors and the stockholders of Camco have taken
                          all action required by the DGCL and Camco's
                          Certificate of Incorporation and By-Laws to authorize
                          the Merger in accordance with the terms of this
                          Merger Agreement; and this Merger Agreement is a
                          valid and binding agreement of Camco enforceable in
                          accordance with its terms, except as such
                          enforceability may be limited by bankruptcy,
                          insolvency, reorganization, moratorium or other
                          similar laws or judicial decisions now or hereafter
                          in effect relating to creditors' rights generally or
                          governing the availability of equitable relief.

                 (e)      Tax Opinion.  STC or a designated member of the STC
                          Affiliated Group shall have received an opinion,
                          satisfactory to the receiving person, dated on or
                          about the date that is two days prior to the date the
                          Proxy Statement is first mailed to stockholders of
                          Camco, of Baker & Botts, L.L.P., to the effect that,
                          if the Merger is consummated in accordance with the
                          terms of this Merger Agreement, the Merger will be
                          treated for federal income tax purposes as a
                          reorganization within the meaning of Section 368(a)
                          of the Code, Schlumberger, STC and Camco will each be
                          a party to that reorganization within the meaning of
                          Section 368(b) of the Code and no gain or loss will
                          be recognized by Schlumberger, STC or Sub as a result
                          of the Merger, which opinion shall not have been
                          withdrawn or modified in any material respect.  A
                          second opinion, reconfirming the foregoing and dated
                          as of the Closing Date, satisfactory to the receiving
                          person, shall have been issued to STC or the
                          designated member of the STC Affiliated Group.  In
                          rendering such opinions, such counsel may receive and
                          rely upon representations of fact contained in
                          certificates of Schlumberger, STC, Sub and Camco.

                 (f)      Transaction Agreement.  Each of the obligations
                          required to be performed by Camco under the
                          Transaction Agreement of even date herewith between
                          Schlumberger and Camco (the "Transaction Agreement")
                          at or prior to the Delivery Date (as defined in the
                          Transaction Agreement) shall have been performed in
                          all material respects and each of the conditions set
                          forth in Article V of the Transaction Agreement shall
                          have been satisfied or waived as set forth therein.

         6.3     Conditions of Obligations of Camco.  The obligation of Camco
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 Camco:

                 (a)      Representations and Warranties.  Each of the
                          representations and warranties of STC and Sub set
                          forth in this Merger Agreement shall be true and
                          correct





                                      -47-
<PAGE>   55
                          in all material respects as of the date of this
                          Merger 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 thresholds otherwise contained
                          in Section 3.2 hereof) would not have a Material
                          Adverse Effect on the STC Affiliated Group (such that
                          the aggregate of the Material Adverse Effect on the
                          STC Affiliated Group hereunder exceeds $400 million)
                          and Camco shall have received a certificate dated the
                          Closing Date by a duly authorized officer of STC to
                          that effect.

                 (b)      Performance of Obligations of STC and Sub.  STC and
                          Sub shall have performed in all material respects all
                          obligations required to be performed by them under
                          this Merger Agreement at or prior to the Closing
                          Date.

                 (c)      Certifications and Opinion.  STC shall have furnished
                          Camco with:

                          (i)     a certified copy of a resolution or
                 resolutions duly adopted by the Board of Directors or a duly
                 authorized committee thereof of STC and Sub approving this
                 Merger Agreement and consummation of the Merger and the
                 transactions contemplated hereby;

                          (ii)    a favorable opinion, dated the Closing Date,
                 in customary form and substance, of David S. Browning,
                 Esquire, General Counsel of Schlumberger, to the effect that:

                                  (A)      Each of STC and Sub is a corporation
                          duly incorporated, validly existing and in good
                          standing under the laws of its jurisdiction of
                          incorporation and has corporate power to own its
                          properties and assets and to carry on its business as
                          presently conducted and as described in the
                          Registration Statement; STC and Sub each has the
                          requisite corporate power to effect the Merger as
                          contemplated by this Merger Agreement; the execution
                          and delivery of this Merger Agreement did not, and
                          the consummation of the Merger will not, violate any
                          provision of STC's or Sub's Certificate of
                          Incorporation or Bylaws; and upon the filing by the
                          Surviving Corporation of the Certificate of Merger,
                          the Merger shall become effective;

                                  (B)      The respective Board of Directors of
                          STC and Sub have taken all action required under its
                          jurisdiction of incorporation, its Certificate of
                          Incorporation or its Bylaws to authorize the
                          execution and delivery of this Merger Agreement and
                          the transactions contemplated hereby, and to
                          authorize the Merger in accordance with the terms of
                          this Merger Agreement; and this Merger Agreement is a
                          valid and binding agreement of STC and Sub





                                      -48-
<PAGE>   56
                          enforceable in accordance with its terms, except as
                          such enforceability may be limited by bankruptcy,
                          insolvency, reorganization, moratorium or other
                          similar laws or judicial decisions now or hereafter
                          in effect relating to creditors' rights generally or
                          governing the availability of equitable relief.

                                  (C)      The shares of Schlumberger Common
                          Stock to be delivered to the holders of Camco Common
                          Stock pursuant to Article II are duly authorized and
                          when issued and delivered as contemplated by this
                          Merger Agreement will be legally and validly issued
                          and fully paid and nonassessable and no stockholders
                          of Schlumberger shall have any preemptive rights with
                          respect thereto either pursuant to the organizational
                          documents of Schlumberger or under applicable law of
                          the jurisdiction of Schlumberger's organization.

                 (d)      Tax Opinion.  Camco shall have received an opinion,
                          satisfactory to Camco, dated on or about the date
                          that is two days prior to the date the Proxy
                          Statement is first mailed to stockholders of Camco, a
                          copy of which will be furnished to STC, of Fulbright
                          & Jaworski L.L.P., to the effect that, if the Merger
                          is consummated in accordance with the terms of this
                          Merger Agreement, the Merger will be treated for
                          federal income tax purposes as a reorganization
                          within the meaning of Section 368(a) of the Code,
                          Schlumberger, STC and Camco will each be a party to
                          that reorganization within the meaning of Section
                          368(b) of the Code, no gain or loss will be
                          recognized by the stockholders of Camco as a result
                          of the Merger upon the conversion of shares of Camco
                          Common Stock into shares of Schlumberger Common Stock
                          and no gain or loss will be recognized by Camco as a
                          result of the Merger, which opinion shall not have
                          been withdrawn or modified in any material respect.
                          A second opinion, reconfirming the foregoing and
                          dated as of the Closing Date, shall have been issued
                          to Camco and a copy shall have been provided to STC.
                          In rendering such opinions, such counsel may receive
                          and rely upon representations of fact contained in
                          certificates of Schlumberger, STC, Sub and Camco.

                 (e)      Fairness Opinion. Morgan Stanley & Co. Incorporated
                          has not revoked, modified or changed its opinion
                          referred to in Section 3.1(p) in any manner adverse
                          to the holders of the Common Stock of Camco.

                 (f)      Transaction Agreement.  Each of the obligations
                          required to be performed by Schlumberger under the
                          Transaction Agreement at or prior to the Delivery
                          Date (as defined in the Transaction Agreement) shall
                          have been performed in all material respects and each
                          of the conditions set forth in Article V of the
                          Transaction Agreement shall have been satisfied or
                          waived as set forth therein.





                                      -49-
<PAGE>   57
                                  ARTICLE VII
                           TERMINATION AND AMENDMENT

         7.1     Termination.  This Merger 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 Camco:

                 (a)      by mutual written consent of Camco and STC, or by
                          mutual action of their respective Boards of
                          Directors;

                 (b)      by either Camco or STC if (i) the Merger shall not
                          have been consummated by December 31, 1998 (provided
                          that the right to terminate this Merger Agreement
                          under this clause (i) shall not be available to any
                          party whose breach of any representation or warranty
                          or failure to fulfill any covenant or agreement under
                          this Merger Agreement has 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
                          stockholders of Camco 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 STC if (i) for any reason Camco fails to call and
                          hold a stockholders' meeting for the purpose of
                          voting upon this Merger Agreement and the Merger by
                          December 31, 1998; (ii) Camco shall have failed to
                          comply in any material respect with any of the
                          covenants or agreements contained in this Merger
                          Agreement to be complied with or performed by Camco
                          at or prior to such date of termination (provided
                          such breach has not been cured within 30 days
                          following receipt by Camco of notice of such breach
                          and is existing at the time of termination of this
                          Merger Agreement); (iii) any representations and
                          warranties of Camco contained in this Merger
                          Agreement shall not have been true when made
                          (provided such breach has not been cured within 30
                          days following receipt by Camco of notice of such
                          breach and is existing at the time of termination of
                          this Merger Agreement) or on and as of the Effective
                          Time as if made on and as of the Effective 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 thresholds otherwise contained in Section
                          3.1 hereof) would not have a Material Adverse Effect
                          on Camco such that the aggregate of the Material
                          Adverse Effect on Camco exceeds $200 million; (iv)
                          the Board of Directors of Camco or any committee
                          thereof (A) withdraws, modifies or changes its





                                      -50-
<PAGE>   58
                          recommendation of this Merger Agreement or the Merger
                          in a manner adverse to the STC Affiliated Group or
                          shall have resolved to do any of the foregoing, or
                          (B) approves or recommends, or proposes to approve or
                          recommend, any Acquisition Proposal; or (v) the
                          Transaction Agreement shall have been terminated by
                          Camco;

                 (d)      by Camco if (i) STC or Sub shall have failed to
                          comply in any material respect with any of the
                          covenants or agreements contained in this Merger
                          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 STC of notice of such breach and is
                          existing at the time of termination of this Merger
                          Agreement); (ii) any representations and warranties
                          of STC or Sub contained in this Merger Agreement
                          shall not have been true when made (provided such
                          breach has not been cured within 30 days following
                          receipt by STC of notice of such breach and is
                          existing at the time of termination of this Merger
                          Agreement) or on and as of the Effective Time as if
                          made on and as of the Effective 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 thresholds
                          otherwise contained in Section 3.2 hereof) would not
                          have a Material Adverse Effect on the STC Affiliated
                          Group such that the aggregate of the Material Adverse
                          Effect on the STC Affiliated Group exceeds $400
                          million; (iii) pursuant to Section 4.2(b) or (iv) the
                          Transaction Agreement shall have been terminated by
                          Schlumberger.

         7.2     Effect of Termination.

                 (a)      In the event of termination of this Merger Agreement
                          by either Camco or STC as provided in Section 7.1,
                          this Merger Agreement shall forthwith become void and
                          there shall be no liability or obligation on the part
                          of Camco or any member of the STC Affiliated Group
                          except (i) with respect to this Section 7.2, the
                          third and fourth sentences of Section 5.1 and Section
                          8.1, and (ii) to the extent that such termination
                          results from the willful breach by a party hereto of
                          any of its representations or warranties or of any of
                          its covenants or agreements, in each case, as set
                          forth in this Merger Agreement except as provided in
                          Section 8.9.

                 (b)      If STC or Camco, as applicable, terminates this
                          Merger Agreement pursuant to Section 4.2(b) or
                          Section 7.1(c)(iv)(B), Camco shall immediately pay
                          STC a fee of $90 million (the "Termination Fee") in
                          cash or by wire transfer of immediately available
                          funds to an account designated by STC.

                 (c)      If STC terminates this Agreement pursuant to Section
                          7.1(c)(iv)(A), Camco shall owe to STC the Termination
                          Fee if Camco consummates a transaction





                                      -51-
<PAGE>   59
                          pursuant to an Acquisition Proposal on or prior to
                          September 30, 1999.  The Termination Fee payable to
                          STC under this Section 7.2(c), if any, shall be
                          payable in cash or by wire transfer of immediately
                          available funds to an account designated by STC on
                          the consummation of the transaction, if any, referred
                          to above.

                 (d)      Camco also agrees to pay to STC the Termination Fee
                          if (i) after the date hereof and before the
                          termination of this Merger Agreement, an Acquisition
                          Proposal shall have been made and publicly announced
                          by any party, (ii) the stockholders of Camco shall
                          not have approved the Merger and (iii) on or prior to
                          September 30, 1999, Camco consummated a transaction
                          pursuant to an Acquisition Proposal.  The Termination
                          Fee payable under this Section 7.2(d) shall be
                          payable on the consummation of such transaction.

         7.3     Amendment.  This Merger 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 Camco, but, after any such
approval, no amendment shall be made which by law requires further approval by
such stockholders without such further approval.  This Merger 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 Merger
Agreement and the consummation of the transactions contemplated hereby, whether
or not the Merger shall be consummated.  In the event the Agreement is
terminated for any reason, STC shall reimburse Camco up to $5 million for the
actual cost of Camco's employee retention program.

         8.2     Nonsurvival of Representations, Warranties and Agreements.
None of the representations, warranties and agreements in this Merger Agreement
or in any instrument delivered pursuant to this Merger 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, 5.5,
5.6, 5.12, 5.13 and 7.2 and this Article VIII and the agreements delivered
pursuant to Section 5.4.  The Confidentiality





                                      -52-
<PAGE>   60
Agreements shall survive the execution and delivery of this Merger Agreement,
and the provisions of the Confidentiality Agreements shall apply to all
information and material delivered hereunder.

         8.3     Knowledge.  When used herein, the terms "knowledge", "known
to", "best knowledge" and terms of similar meaning shall mean the actual
knowledge of (a) with respect to Camco, (i) the Chief Financial Officer, the
Chief Accounting Officer, and the General Counsel and Secretary of Camco as of
the date of this Agreement and (ii) all of officers of Camco as of the Closing
Date and (b) with respect to the STC Affiliated Group, (A) (1) the President
and (2) the Vice President and Secretary of STC, as of the date of this
Agreement and (B) all of the officers of STC as of the Closing Date.

         8.4     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 STC or Sub, to:
                                  277 Park Avenue
                                  New York, New York 10172
                                  Attention: David S. Browning, Esquire
                                  Fax: (212) 350-9457

                                  with a copy to:

                                  Baker & Botts, L.L.P.
                                  910 Louisiana, Suite 3000
                                  Houston, Texas 77002
                                  Attention: Moulton A. Goodrum, Esquire
                                  Fax: (713) 229-1522

                          and (b) if to Camco, to:

                                  Camco International, Inc.
                                  7030 Ardmore
                                  Houston, Texas 77054
                                  Attention: Ronald R. Randall, Esquire
                                  Fax: (713) 749-5625





                                      -53-
<PAGE>   61
                                  with a copy to:

                                  Fulbright & Jaworski LLP
                                  1301 McKinney, Suite 5100
                                  Houston, Texas 77010
                                  Attention: Michael C. Conlon, Esquire
                                  Fax: (713) 651-5246


         8.5     Interpretation.  When a reference is made in this Merger
Agreement to Sections, such reference shall be to a Section of this Merger
Agreement unless otherwise indicated.  The table of contents, glossary of
defined terms and headings contained in this Merger Agreement are for reference
purposes only and shall not affect in any way the meaning or interpretation of
this Merger Agreement.  Whenever the word "include," "includes" or "including"
is used in this Merger Agreement, it shall be deemed to be followed by the
words "without limitation."  The phrase "made available" in this Merger
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.

         8.6     Counterparts.  This Merger 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.

         8.7     Entire Agreement; No Third-Party Beneficiaries.  This Merger
Agreement (together with the Confidentiality Agreements, the Transaction
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 Section 5.6, is not
intended to confer upon any person other than the parties hereto any rights or
remedies hereunder.

         8.8     Governing Law.  This Merger 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.

         8.9     No Remedy in Certain Circumstances.  Each party agrees that,
should any court or other competent authority hold any provision of this Merger
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
Merger Agreement or makes the Merger Agreement impossible to perform in which
case this Merger Agreement shall terminate pursuant to Article VII hereof.
Except as otherwise contemplated by this Merger Agreement, to the extent that a
party hereto took an action inconsistent herewith or failed to take action
consistent herewith or required hereby





                                      -54-
<PAGE>   62
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 5.3 hereof or did not in good faith seek to
resist or object to the imposition or entering of such order or judgment.

         8.10    Assignment.  Neither this Merger 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 or indirect wholly owned Subsidiary of STC.  Subject to
the preceding sentence, this Merger Agreement will be binding upon, inure to
the benefit of and be enforceable by the parties and their respective
successors and assigns.

         8.11    Enforcement of the Agreement.  The parties agree that
irreparable damage would occur in the event that any of the provisions of this
Merger Agreement were not performed in accordance with their specific terms or
were otherwise breached.  It is accordingly agreed that the parties shall be
entitled to an injunction or injunctions to prevent breaches of this Merger
Agreement and to enforce specifically the terms and provisions hereof in any
court of the United States located in the State of Delaware or in the Chancery
Court of the State of Delaware, this being in addition to any other remedy to
which they are entitled at law or in equity.  In addition, each of the parties
hereto (a) consents to submit itself to the personal jurisdiction of any
Federal or state court sitting in Wilmington, Delaware in the event any dispute
between the parties hereto arises out of this Agreement solely in connection
with such a suit between the parties, (b) agrees that it will not attempt to
deny or defeat such personal jurisdiction by motion or other request for leave
from any such court and (c) agrees that it will not bring any action relating
to this Agreement in any court other than a Federal or state court sitting in
Wilmington, Delaware.





                                      -55-
<PAGE>   63
                 IN WITNESS WHEREOF, each party has caused this Merger
Agreement to be signed by its respective officers thereunto duly authorized,
all as of the date first written above.


                                  SCHLUMBERGER TECHNOLOGY CORPORATION
                                  
                                  
                                  
                                  By:     /s/ ARTHUR LINDENAUER 
                                       ----------------------------------------
                                       Arthur Lindenauer
                                       President
                                  
                                  SCHLUMBERGER OFS, INC.
                                  
                                  
                                  
                                  By:     /s/ ARTHUR LINDENAUER
                                       ----------------------------------------
                                       Arthur Lindenauer
                                       President
                                  
                                  CAMCO INTERNATIONAL, INC.
                                  
                                  
                                  
                                  By:    /s/ GILBERT H. TAUSCH 
                                      -----------------------------------------
                                      Gilbert H. Tausch
                                      President and Chief Executive Officer

<PAGE>   1
                                                                    EXHIBIT 4.1

================================================================================


                            CAMCO INTERNATIONAL INC.



                                      and



                    FIRST CHICAGO TRUST COMPANY OF NEW YORK




                              SECOND AMENDMENT TO
                                RIGHTS AGREEMENT




                                 June 18, 1998


================================================================================

<PAGE>   2
                              SECOND AMENDMENT TO
                                RIGHTS AGREEMENT

         THIS SECOND AMENDMENT TO RIGHTS AGREEMENT (this "Second Amendment") is
entered into effective as of June 18, 1998 by and between Camco International,
Inc., a Delaware corporation (the "Company"), and First Chicago Trust Company
of New York (the "Rights Agent").

                             W I T N E S S E T H :


         WHEREAS, the Company and the Rights Agent are parties to a Rights
Agreement dated as of December 15, 1994 (the "Rights Agreement");

         WHEREAS, the Company and the Rights Agent are parties to a First
Amendment to Rights Agreement dated as of October 21, 1997 (the "First
Amendment to Rights Agreement");

         WHEREAS, the Board of Directors of the Company deems it advisable that
the Rights Agreement be amended to adjust the definition of Acquiring Person in
the Rights Agreement; and

         WHEREAS, the Company and the Rights Agent desire to further amend the
Rights Agreement, pursuant to Section 27 of the Rights Agreement, as
hereinafter set forth;

         NOW, THEREFORE, in consideration of the premises and other good and
sufficient consideration, the parties hereto hereby agree as follows:

         1.      Section 1(a) of the Rights Agreement is hereby amended to read
in its entirety as follows:  "(a) "Acquiring Person" shall mean any Person (as
such term is hereinafter defined) who or which, together with all Affiliates
and Associates (as such terms are hereinafter defined) of such Person, shall be
the Beneficial Owner (as such term is hereinafter defined) of 15% or more of
the Common Shares then outstanding, but shall not include the Company, any
wholly-owned Subsidiary (as such term is hereinafter defined) of the Company,
any employee benefit plan of the Company or of any Subsidiary of the Company,
or any Person holding Common Shares for or pursuant to the terms of any such
plan to the extent, and only to the extent, of the Common Shares so held.
Notwithstanding the foregoing, no Person shall become an "Acquiring Person" as
the result of an acquisition of Common Shares by the Company which, by reducing
the number of shares outstanding, increases the proportionate number of shares
beneficially owned by such Person to 15% or more of the Common Shares then
outstanding; provided, however, that if a Person becomes the Beneficial Owner
of 15% or more of the Common Shares then outstanding by reason of share
acquisitions by the Company and shall, after such share acquisitions by the
Company, become the Beneficial Owner of any additional Common Shares, then such
Person shall be deemed to be an "Acquiring Person".  Notwithstanding the
foregoing, neither Schlumberger Limited nor any of its Subsidiaries shall be
deemed to be an "Acquiring Person" because of (i) the execution and delivery of
that certain Transaction Agreement between Schlumberger Limited and Camco
International Inc. dated as of June 18, 1998, (ii) the consummation of any of
the transactions contemplated thereby, (iii) the
<PAGE>   3
conversion of shares of Camco International Inc. Common Stock into the right to
receive Schlumberger Limited Common Stock as described therein or (iv) the
execution of consummation of the merger as contemplated by that certain
Agreement and Plan of Merger among Schlumberger Technology Corporation,
Schlumberger OFS, Inc. and Camco International Inc. dated as of June 18, 1998
and the consummation of the merger as contemplated thereby."

         2.      Each reference to the Rights Agreement in the Rights Agreement
shall, unless the context otherwise requires, mean the Rights Agreement as
amended by the First Amendment to Rights Agreement and this Second Amendment to
Rights Agreement.

         3.      The Rights Agreement, as amended hereby, is in all respects
ratified, approved and confirmed.

         4.      This Second Amendment to Rights Agreement shall be governed by
and construed in accordance with the laws of the State of Delaware without
regard to any principles of conflicts of law that, if applied, might require or
permit the application of the laws of a different jurisdiction.

         5.      The provisions of this Second Amendment to Rights Agreement
shall become effective upon the execution and delivery hereof by all parties
hereto.

         IN WITNESS WHEREOF, the parties hereto have caused this Rights
Agreement Amendment to be duly executed and attested, all as of the day and
year first above written.



Attest:                                     CAMCO INTERNATIONAL INC.



By /s/ Ronald R. Randall                      By /s/ H. S. Yates
  ----------------------------                ----------------------------




Attest:                                     FIRST CHICAGO TRUST COMPANY OF 
                                             NEW YORK


By /s/ Shirley C. Grant                     By /s/ Joanne Gorostiola
  ----------------------------                ----------------------------





                                      -2-

<PAGE>   1

                                                                    EXHIBIT 10.1







                              TRANSACTION AGREEMENT

                                     between

                              SCHLUMBERGER LIMITED

                                       and

                            CAMCO INTERNATIONAL INC.


                            Dated as of June 18, 1998




<PAGE>   2




                                TABLE OF CONTENTS

<TABLE>
<CAPTION>

                                                                                                               Page
<S>                                                                                                             <C>
ARTICLE I             DEFINITIONS.................................................................................1

ARTICLE II            DELIVERY, REGISTRATION AND LISTING OF SCHLUMBERGER
                      STOCK.......................................................................................4
         2.1          Delivery of Schlumberger Common Stock.......................................................4
         2.2          Preparation of S-4 and the Proxy Statement..................................................4
         2.3          Authorization for Shares and Stock Exchange Listing.........................................4

ARTICLE III           REPRESENTATIONS AND WARRANTIES..............................................................5
         3.1          Representations and Warranties of Camco.....................................................5
                      (a)  Authority; No Violations; Consents and Approvals.......................................5
                      (b)  Litigation.............................................................................7
                      (c)  Incorporation by Reference.............................................................7
         3.2          Representations and Warranties of Schlumberger..............................................7
                      (a)  Organization, Standing and Power.......................................................7
                      (b)  Capital Structure......................................................................7
                      (c)  Authority; No Violations, Consents and Approvals.......................................8
                      (d)  SEC Documents.........................................................................10
                      (e)  Information Supplied..................................................................10
                      (f)  Absence of Certain Changes or Events..................................................11
                      (g)  No Undisclosed Material Liabilities...................................................11
                      (h)  Litigation............................................................................11
                      (i)  No Vote Required......................................................................12
                      (j)  Accounting Matters....................................................................12
                      (k)  Beneficial Ownership of Camco Common Stock............................................12
                      (l)  Material Contracts and Agreements.....................................................12

ARTICLE IV            ADDITIONAL AGREEMENTS......................................................................12
         4.1          Legal Conditions to Merger.................................................................12
         4.2          Agreement to Defend........................................................................14
         4.3          Accounting Matters.........................................................................14
         4.4          Public Announcements.......................................................................14
         4.5          Other Actions..............................................................................14
         4.6          Advice of Changes; SEC Filings.............................................................14
         4.7          Reorganization.............................................................................15
         4.8          Takeover Defenses..........................................................................15
         4.9          Letter of Camco's Accountants..............................................................15
         4.10         Letter of Schlumberger's Accountants.......................................................15
</TABLE>

                                       -i-
<PAGE>   3


<TABLE>

<S>                                                                                                             <C>
         4.11         Rights Agreement...........................................................................15
         4.12         Stock Options..............................................................................16

ARTICLE V             CONDITIONS PRECEDENT.......................................................................16
         5.1          Conditions to Camco's Closing Deliveries...................................................16
                      (a)  Representations and Warranties........................................................16
                      (b)  Performance of Obligations of Schlumberger............................................16
                      (c)  Certifications and Opinion............................................................16
                      (d)  Fairness Opinion......................................................................17
         5.2          Conditions to Schlumberger's Closing Deliveries............................................17
                      (a)  Representations and Warranties........................................................18
                      (b)  Performance of Obligations of Camco...................................................18
                      (c)  Certifications and Opinion............................................................18

ARTICLE VI            TERMINATION AND AMENDMENT..................................................................19
         6.1          Termination................................................................................19
         6.2          Effect of Termination......................................................................19
         6.3          Amendment..................................................................................20
         6.4          Extension; Waiver..........................................................................20

ARTICLE VII           GENERAL PROVISIONS.........................................................................20
         7.1          Payment of Expenses........................................................................20
         7.2          Nonsurvival of Representations, Warranties and Agreements..................................20
         7.3          Notices....................................................................................20
         7.4          Interpretation.............................................................................21
         7.5          Counterparts...............................................................................22
         7.6          Entire Agreement; No Third-Party Beneficiaries.............................................22
         7.7          Governing Law..............................................................................22
         7.8          No Remedy in Certain Circumstances.........................................................22
         7.9          Assignment.................................................................................22
         7.10         Enforcement of the Agreement...............................................................22
</TABLE>


EXHIBITS:

Exhibit A - Agreement and Plan of Merger



                                      -ii-
<PAGE>   4




                              TRANSACTION AGREEMENT


                  THIS TRANSACTION AGREEMENT, dated as of June 18, 1998 (this
"Transaction Agreement"), is by and between Schlumberger Limited, a Netherlands
Antilles corporation ("Schlumberger"), and Camco International Inc., a Delaware
corporation ("Camco").

                  WHEREAS, pursuant to that certain Agreement and Plan of Merger
of even date herewith, among Schlumberger Technology Corporation, a Texas
corporation and a wholly owned subsidiary of Schlumberger ("STC"), Schlumberger
OFS, Inc., a Delaware corporation and a wholly owned Subsidiary of STC ("Sub"),
and Camco (the "Merger Agreement"), Sub will be merged with and into Camco with
Camco becoming a wholly owned subsidiary of STC (the "Merger");

                  WHEREAS, the Board of Directors at Camco and Schlumberger have
each determined that this Transaction Agreement and the transactions
contemplated hereby are in the best interests of their respective stockholders;

                  WHEREAS, pursuant to the Merger Agreement, each outstanding
share of common stock, par value $.01 per share, of Camco ("Camco Common Stock")
will be exchanged for and converted into 1.18 (the "Conversion Number") shares
of voting common stock, par value $.01 per share of Schlumberger ("Schlumberger
Common Stock"); and

                  WHEREAS, Schlumberger desires to make certain representations
and commitments in connection with 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

                                   DEFINITIONS

                  As used in this Transaction Agreement, the following terms
shall have the following meanings:

                  "Camco" has the meaning set forth in the preamble hereto.

                  "Camco Common Stock" has the meaning set forth in the recitals
hereto.

                  "Camco Disclosure Letter" means the disclosure letter
delivered by Camco to STC pursuant to the Merger Agreement.

                  "Camco Litigation" has the meaning set forth in Section 3.1(b)
hereof.



                                      -1-
<PAGE>   5




                  "Camco Order" has the meaning set forth in Section 3.1(j) of
the Merger Agreement.

                  "Camco Stock Option" has the meaning set forth in Section 5.5
of the Merger Agreement.

                  "Certificate of Merger" has the meaning set forth in Section
1.1 of the Merger Agreement.

                  "Closing" has the meaning set forth in Section 1.1 of the
Merger Agreement.

                  "Closing Date" has the meaning set forth in Section 1.2 of the
Merger Agreement.

                  "Code" has the meaning set forth in the recitals to the Merger
Agreement.

                  "Confidentiality Agreements" has the meaning set forth in
Section 5.1 of the Merger Agreement.

                  "Conversion Number" has the meaning set forth in the recitals
hereto.

                  "Delivery Date" has the meaning set forth in Section 2.1
hereof.

                  "DGCL" has the meaning set forth in Section 1.1 of the Merger
Agreement.

                  "Effective Time" has the meaning set forth in Section 1.1 of
the Merger Agreement.

                  "Exchange Act" has the meaning set forth in Section
3.1(a)(iii) hereof.

                  "GAAP" has the meaning set forth in Section 3.1(d) of the
Merger Agreement.

                  "Governmental Entity" has the meaning set forth in Section
3.1(a)(iii) hereof.

                  "HSR Act" has the meaning set forth in Section 3.1(a)(iii)
hereof.

                  "Knowledge" "known to", "best knowledge" and terms of similar
meaning shall mean (a) with respect to Camco, (i) the Chief Financial Officer,
the Chief Accounting Officer and the General Counsel and Secretary of Camco as
of the date of this Agreement and (ii) all of the officers of Camco as of the
Closing Date and (b) with respect to Schlumberger, (A) (1) the Executive Vice
President, Chief Financial Officer and (2) the General Counsel and Secretary of
Schlumberger, as of the date of this Agreement and (B) all of the officers of
Schlumberger as of the Closing Date.

                  "Material Adverse Effect" has the meaning set forth in Section
3.1(a)(i) hereof.

                  "Merger" has the meaning set forth in the recitals hereto.


                                      -2-
<PAGE>   6




                  "Merger Agreement" has the meaning set forth in the recitals
hereto.

                  "NYSE" has the meaning set forth in Section 3.2(c)(iii)
hereof.

                  "Proxy Statement" has the meaning set forth in Section
3.1(a)(iii) hereof.

                  "Returns" has the meaning set forth in Section 3.1(k)(i) of
the Merger Agreement.

                  "Rights Agreement" has the meaning set forth in Section 3.1(b)
of the Merger Agreement.

                  "S-4" has the meaning set forth in Section 3.1(e) of the
Merger Agreement.

                  "Schlumberger" has the meaning set forth in the preamble
hereto.

                  "Schlumberger Common Stock" has the meaning set forth in the
recitals hereto.

                  "Schlumberger Disclosure Letter" means the disclosure letter
delivered by Schlumberger to Camco pursuant to this Transaction Agreement.

                  "Schlumberger Litigation" has the meaning set forth in Section
3.2(h) hereof.

                  "Schlumberger Option Plans" has the meaning set forth in
Section 3.2(b) hereof.

                  "Schlumberger Preferred Stock" has the meaning set forth in
3.2(b) hereof.

                  "Schlumberger SEC Documents" has the meaning set forth in
Section 3.2(d) hereof.

                  "SEC" has the meaning set forth in Section 3.1(a) of the
Merger Agreement.

                  "Securities Act" has the meaning set forth in Section 3.1(d)
of the Merger Agreement.

                  "Significant Subsidiary" has the meaning set forth in Section
4.1(g) of the Merger Agreement.

                  "STC" has the meaning set forth in the recitals hereto.

                  "Sub" has the meaning set forth in the recitals hereto.

                  "Subsidiary" has the meaning set forth in Section 2.1(b) of
the Merger Agreement.

                  "Voting Debt" has the meaning set forth in Section 3.1(b) of
the Merger Agreement.


                                      -3-
<PAGE>   7




                                   ARTICLE II

                           DELIVERY, REGISTRATION AND
                          LISTING OF SCHLUMBERGER STOCK

         2.1 Delivery of Schlumberger Common Stock. Prior to the Merger, upon
the request of STC and subject to the conditions set forth in Section 5.2
hereof, Schlumberger will sell to STC all or any portion of that number of
shares of Schlumberger Common Stock which are to be received by the holders of
Camco Common Stock in exchange for and upon conversion of the Camco Common Stock
pursuant to Section 2.1(c) of the Merger Agreement. The date on which
Schlumberger delivers such Schlumberger Common Stock to STC is referred to in
this Transaction Agreement as the "Delivery Date". Schlumberger acknowledges
that, pursuant to Section 2.1(e) of the Merger Agreement, if subsequent to the
date of this Agreement but prior to the Effective Time, the number of shares of
Schlumberger Common Stock issued and outstanding is changed as a result of a
stock split, reverse stock split, stock dividend, recapitalization or other
similar transaction, the Conversion Number and other items dependent thereon
will be appropriately adjusted in the Merger Agreement and this Transaction
Agreement.

         2.2 Preparation of S-4 and the Proxy Statement. Schlumberger and Camco
shall promptly prepare and file with the SEC the Proxy Statement and
Schlumberger shall prepare and file with the SEC the S-4, in which the Proxy
Statement will be included as a prospectus. Each of Schlumberger and Camco 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 Camco and Schlumberger
shall use its best efforts to cause the Proxy Statement to be mailed to
stockholders of Camco at the earliest practicable date. Schlumberger 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
Schlumberger Common Stock in the Merger and upon the exercise of Camco Stock
Options and Camco shall furnish all information concerning Camco and the holders
of Camco Common Stock as may be reasonably requested in connection with
obtaining such permits, approvals and registrations.

         2.3 Authorization for Shares and Stock Exchange Listing. Prior to the
Effective Time, Schlumberger shall have taken all action necessary to permit it
to issue the number of shares of Schlumberger Common Stock required to be issued
pursuant to Section 2.1 of the Merger Agreement. Schlumberger shall use all
reasonable efforts to cause the shares of Schlumberger Common Stock to be
delivered in the Merger to be approved for listing on the NYSE, subject to
official notice of issuance, prior to the Closing Date.


                                      -4-

<PAGE>   8




                                   ARTICLE III

                         REPRESENTATIONS AND WARRANTIES

         3.1 Representations and Warranties of Camco. Camco represents and
warrants to Schlumberger as follows:

                  (a)      Authority; No Violations; Consents and Approvals.

                           (i) Camco has all requisite corporate power and
                  authority to enter into this Transaction Agreement and to
                  consummate the transactions contemplated hereby. The execution
                  and delivery of this Transaction Agreement and the
                  consummation of the transactions contemplated hereby have been
                  duly authorized by all necessary corporate action on the part
                  of Camco. This Transaction Agreement has been duly executed
                  and delivered by Camco and assuming this Transaction Agreement
                  constitutes the valid and binding obligation of Schlumberger,
                  constitutes a valid and binding obligation of Camco
                  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 and
                  limitations imposed on indemnity obligations by applicable
                  federal and state securities laws.

                           (ii) Except as set forth on Schedule 3.1(c) to the
                  Camco Disclosure Letter, the execution and delivery of this
                  Transaction 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 result in the creation of any
                  lien, security interest, charge or encumbrance upon any of the
                  properties or assets of Camco or any of its Subsidiaries
                  under, any provision of (A) the Certificate of Incorporation
                  or Bylaws of Camco or any provision of the comparable charter
                  or organizational documents of any of its Subsidiaries, (B)
                  any loan or credit agreement, note, bond, mortgage, indenture,
                  lease or other agreement, instrument, permit, concession,
                  franchise or license applicable to Camco or any of its
                  Subsidiaries or (C) assuming the consents, approvals,
                  authorizations or permits and filings or notifications
                  referred to in Section 3.1(a)(iii) are duly and timely
                  obtained or made and the approval of the Merger and the Merger
                  Agreement by the stockholders of Camco has been obtained, any
                  judgment, order, decree, statute, law, ordinance, rule or
                  regulation applicable to Camco or any of its Subsidiaries or
                  any of their respective properties or assets, other than, in
                  the case of clause (B) or (C), any such conflicts, violations,
                  defaults, rights, liens, security interests, charges or
                  encumbrances that, individually or in the aggregate, would not
                  have a Material Adverse Effect (as defined below) on Camco,
                  materially impair the


                                      -5-
<PAGE>   9




                  ability of Camco to perform its obligations hereunder or
                  prevent the consummation of any of the transactions
                  contemplated hereby. As used in this Transaction Agreement a
                  "Material Adverse Effect" shall mean, any effect or change
                  that is or would be materially adverse to the business,
                  operations, assets, condition (financial or otherwise) or
                  results of operations of (x) in respect of Camco, Camco and
                  its direct and indirect Subsidiaries, taken as a whole, and
                  (y) in respect of the STC Affiliated Group, the STC Affiliated
                  Group taken as a whole; provided, however, a Material Adverse
                  Effect shall not include (1) any effect or change, including
                  changes in national or international economic conditions,
                  relating to or affecting the oil and gas service and equipment
                  industry as a whole (including a decline in worldwide oil and
                  gas commodity prices), (2) changes, or possible changes, in
                  foreign, federal, state or local statutes and regulations, (3)
                  the loss of employees, customers or suppliers by Camco or one
                  or more of its Subsidiaries as a direct or indirect
                  consequence of any announcement relating to the Merger or (4)
                  any action taken or required to be taken to satisfy any
                  requirement imposed in connection with the review of the
                  Merger under the HSR Act. As used herein, the term
                  "Consideration" means the number of shares of Camco Common
                  Stock outstanding on the day prior to the date of this
                  Agreement multiplied by the Conversion Number and then
                  multiplied by the closing sales price of Schlumberger Common
                  Stock on the NYSE on the last trading day prior to the date of
                  this Agreement.

                           (iii) No consent, approval, order or authorization
                  of, or registration, declaration or filing with, or permit
                  from, any U.S. or non-U.S. court, administrative agency or
                  commission or other governmental authority or instrumentality
                  (a "Governmental Entity") is required by or with respect to
                  Camco or any of its Subsidiaries in connection with the
                  execution and delivery of this Transaction Agreement by Camco
                  or the consummation by Camco of the transactions contemplated
                  hereby, as to which the failure to obtain or make would have a
                  Material Adverse Effect on Camco, except for: (A) the filing
                  of a premerger notification report by Camco 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
                  filing with the SEC of (1) a proxy statement in preliminary
                  and definitive form relating to the meeting of Camco's
                  stockholders to be held in connection with the Merger (the
                  "Proxy Statement") and (2) 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 Transaction Agreement, the Merger
                  Agreement and the transactions contemplated hereby and
                  thereby; (C) the filing of the Certificate of Merger with the
                  Secretary of State of the State of Delaware; (D) such filings
                  and approvals as may be required by any applicable state
                  securities, "blue sky" or takeover laws, or environmental
                  laws; (E) such filings and approvals as may be required by any
                  applicable non-U.S.


                                      -6-
<PAGE>   10




                  Governmental Entity; and (F) such filings and approvals as may
                  be required by any non-U.S. premerger notification,
                  securities, corporate or other law, rule or regulation.

                  (b) Litigation. Except as disclosed in the Camco SEC Documents
         or in the Camco litigation report previously delivered to Schlumberger,
         there is no (i) suit, action or proceeding pending or, to the best
         knowledge of Camco, threatened against or affecting Camco or any
         Subsidiary of Camco ("Camco Litigation"), or (ii) Camco Order, that
         would (in any case) have a Material Adverse Effect on Camco or prevent
         Camco from consummating the transactions contemplated by this
         Transaction Agreement.

                  (c) Incorporation by Reference. Each of the representations
         and warranties made by Camco in the Merger Agreement is incorporated by
         reference herein as if fully set forth herein together with the
         definitions of the defined terms used therein, mutatis mutandis, so
         that references to the recipient of any such representations and
         warranties shall be deemed to be references to Schlumberger. Each such
         representation and warranty so incorporated herein by reference is
         hereby confirmed directly to Schlumberger.

         3.2 Representations and Warranties of Schlumberger. Schlumberger
represents and warrants to Camco as follows:

                  (a) Organization, Standing and Power. Schlumberger is a
         corporation duly organized, validly existing and in good standing under
         the laws of its jurisdiction of incorporation, has all requisite
         corporate 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 where (individually as in the aggregate) the failure to be so
         organized or so to qualify would not have a Material Adverse Effect on
         Schlumberger. Complete and correct copies of the Certificates of
         Incorporation and Bylaws of Schlumberger have heretofore been made
         available to Camco.

                  (b) Capital Structure. As of the date hereof, the authorized
         capital stock of Schlumberger consists of 1,000,000,000 shares of
         Schlumberger Common Stock and 200,000,000 shares of preferred stock
         ("Schlumberger Preferred Stock"). At the close of business on May 31,
         1998 (i) 498,941,351 shares of Schlumberger Common Stock were issued
         and outstanding and an aggregate of 58,644,415 shares of Schlumberger
         Common Stock were reserved for issuance pursuant to Schlumberger's:


                                      -7-
<PAGE>   11



<TABLE>

<S>                                                                                                <C>       
                  Discounted Stock Purchase Plan............................................       14,624,867
                  1998 Stock Option Plan ...................................................       12,000,000
                  1979 Stock Incentive Plan ................................................          119,300
                  1979 Incentive Stock Option Plan..........................................           86,044
                  1994 Stock Option Plan ...................................................       19,557,184
                  1989 Stock Incentive Plan ................................................       12,247,263
                  IVS Stock Option Plan ....................................................            9,757
</TABLE>

         (collectively, the "Schlumberger Option Plans"); (ii) 120,201,108
         shares of Schlumberger Common Stock were held by Schlumberger in its
         treasury or by its wholly owned Subsidiaries; (iii) a warrant to
         acquire 15,000,000 shares of Schlumberger Common Stock at an exercise
         price per share of $29.975 was outstanding; (iv) no shares of
         Schlumberger Preferred Stock were outstanding; and (v) no Voting Debt
         was outstanding. All outstanding shares of Schlumberger Common Stock
         are, and the shares of Schlumberger Common Stock when issued in
         accordance with this Transaction Agreement, and upon exercise of the
         Camco Stock Options 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) to the
         Schlumberger Disclosure Letter, all outstanding shares of capital stock
         of the Significant Subsidiaries of Schlumberger have been duly
         authorized and validly issued and are fully paid and non-assessable,
         and were not issued in violation of any preemptive rights or other
         preferential rights of subscription or purchase other than those that
         have been waived or otherwise cured or satisfied, and, except as set
         forth in the Schlumberger SEC Documents or Schedule 3.2(b) to the
         Schlumberger Disclosure Letter, all such shares are owned by
         Schlumberger or a direct or indirect wholly owned Subsidiary of
         Schlumberger, free and clear of all liens, charges, encumbrances,
         claims and options of any nature.

                  (c)      Authority; No Violations, Consents and Approvals.

                           (i) Schlumberger has all requisite corporate power
                  and authority to enter into this Transaction Agreement and to
                  consummate the transactions contemplated hereby. The execution
                  and delivery of this Transaction Agreement and the
                  consummation of the transactions contemplated hereby have been
                  duly authorized by all necessary corporate action on the part
                  of Schlumberger. This Transaction Agreement has been duly
                  executed and delivered by Schlumberger. Assuming this
                  Transaction Agreement constitutes the valid and binding
                  obligation of Camco, it also constitutes a valid and binding
                  obligation of Schlumberger and is enforceable against
                  Schlumberger in accordance with its terms; provided, however,
                  that such enforceability is subject to bankruptcy, insolvency,
                  reorganization and other laws of general applicability
                  relating to or affecting creditors' rights and to general
                  principles of equity and limitations imposed on indemnity
                  obligations by applicable federal and state securities laws.


                                      -8-
<PAGE>   12




                           (ii) Except as set forth an Schedule 3.2(c)(ii) to
                  the Schlumberger Disclosure Letter, the execution and delivery
                  of this Transaction 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 result in the
                  creation of any lien, security interest, charge or encumbrance
                  upon any of the properties or assets of Schlumberger or any of
                  its Subsidiaries under, any provision of (A) the Certificate
                  of Incorporation or Bylaws of Schlumberger or any provision of
                  the comparable charter or organizational documents of any of
                  its Significant Subsidiaries, (B) any loan or credit
                  agreement, note, bond, mortgage, indenture, lease or other
                  agreement, instrument, permit, concession, franchise or
                  license applicable to Schlumberger or any of its Subsidiaries
                  or (C) 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 and the
                  approval of the Merger and this Transaction Agreement by the
                  stockholders of Schlumberger has been obtained, any judgment,
                  order, decree, statute, law, ordinance, rule or regulation
                  applicable to Schlumberger or any of its Subsidiaries or any
                  of their respective properties or assets, other than, in the
                  case of clause (B) or (C), any such conflicts, violations,
                  defaults, rights, liens, security interests, charges or
                  encumbrances that, individually or in the aggregate, would not
                  have a Material Adverse Effect on Schlumberger or prevent in
                  any material respect 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 Governmental Entity is required by or with respect
                  to Schlumberger or any of its Subsidiaries in connection with
                  the execution and delivery of this Transaction Agreement by
                  Schlumberger or the consummation by Schlumberger of the
                  transactions contemplated hereby, as to which the failure to
                  obtain or make would have a Material Adverse Effect on
                  Schlumberger, except for: (A) the filing of a premerger
                  notification report by Schlumberger 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 Transaction
                  Agreement, the Merger Agreement and the transactions
                  contemplated hereby and thereby, 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 New
                  York Stock Exchange, Inc. (the "NYSE"); (E) such filings and
                  approvals as may be required by any applicable state
                  securities, "blue sky" or takeover laws or environmental laws;
                  (F) such filings and approvals as may be required by any
                  applicable non-U.S. Governmental Entity; and (G) such filings
                  and approvals as may


                                      -9-
<PAGE>   13




                  be required by any non-U.S. premerger notification,
                  securities, corporate or other law, rule or regulation.

                  (d) SEC Documents. A true and complete copy of each report,
         schedule, registration statement and definitive proxy statement filed
         by Schlumberger with the SEC since January 1, 1995 and prior to the
         date of this Transaction Agreement (the "Schlumberger SEC Documents")
         has been made available to Camco. The Schlumberger SEC Documents are
         all the documents (other than preliminary material) that Schlumberger
         was required to file with the SEC since such date. As of their
         respective dates, the Schlumberger 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 Schlumberger SEC Documents, and none
         of the Schlumberger SEC Documents contained when filed 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 under which they were made, not
         misleading. The financial statements of Schlumberger included in the
         Schlumberger 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 year-end adjustments and other
         adjustments discussed therein) the consolidated financial position of
         Schlumberger and its consolidated Subsidiaries as of their respective
         dates and the consolidated results of operations and the consolidated
         cash flows of Schlumberger and its consolidated Subsidiaries for the
         periods presented therein.

                  (e) Information Supplied. None of the information supplied or
         to be supplied by Schlumberger or any of its Subsidiaries for inclusion
         or incorporation by reference in the S-4 will, at the time the S-4 is
         filed with SEC or when it becomes effective under the Securities Act
         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 Schlumberger or any of its Subsidiaries and
         included or incorporated by reference in the Proxy Statement will, at
         the date mailed to stockholders of Camco or at the time of the meeting
         of such stockholders to be held in connection with the Merger, 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 Schlumberger or any of its Subsidiaries, or with
         respect to other information supplied by Schlumberger or any of its
         Subsidiaries 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


                                      -10-
<PAGE>   14




         the SEC. The Proxy Statement, insofar as it relates to Schlumberger or
         Subsidiaries of Schlumberger or other information supplied by
         Schlumberger or any of its Subsidiaries 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, except that no
         representations or warranties are made by Schlumberger with respect to
         statements made or incorporated by reference therein based on
         information supplied by Camco or any of Camco's Subsidiaries.

                  (f) Absence of Certain Changes or Events. Except as disclosed
         in, or reflected in the financial statements included in, the
         Schlumberger SEC Documents or on Schedule 3.2(f) to the Schlumberger
         Disclosure Letter, or except as contemplated by this Transaction
         Agreement or the Merger Agreement, since December 31, 1997 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 Schlumberger's capital stock, except for regular quarterly
         cash dividends of $.1875 per share on Schlumberger Common Stock with
         usual record and payment dates for such dividends; (ii) any amendment
         of any material term of any outstanding equity security of Schlumberger
         or any Significant Subsidiary; (iii) any material change in any method
         of accounting or accounting practice by Schlumberger or any Significant
         Subsidiary; or (iv) 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 would have a Material
         Adverse Effect on Schlumberger.

                  (g) No Undisclosed Material Liabilities. Except as disclosed
         in the Schlumberger SEC Documents or on Schedule 3.2(g) to the
         Schlumberger Disclosure Letter, there are no liabilities of
         Schlumberger or any of its Subsidiaries of any kind whatsoever, whether
         accrued, contingent, absolute, determined, determinable or otherwise,
         that would have a Material Adverse Effect on Schlumberger, other than:
         (i) liabilities adequately provided for on the balance sheet of
         Schlumberger dated as of March 31, 1998 (including the notes thereto)
         contained in Schlumberger's Quarterly Report on Form 10-Q for the
         quarter ended March 31, 1998; (ii) liabilities incurred in the ordinary
         course of business since March 31, 1998; and (iii) liabilities under
         this Transaction Agreement and the Merger Agreement.

                  (h) Litigation. Except as disclosed in the Schlumberger SEC
         Documents or on Schedule 3.2(h) to the Schlumberger Disclosure Letter,
         there is no (i) suit, action or proceeding pending or, to the best
         knowledge of Schlumberger, threatened against or affecting Schlumberger
         or any Subsidiary of Schlumberger ("Schlumberger Litigation"), or (ii)
         judgment, decree, injunction, rule or order of any Governmental Entity
         or arbitrator outstanding against Schlumberger or any Subsidiary of
         Schlumberger that (in any case) would have a Material Adverse Effect on
         Schlumberger or prevent Schlumberger from consummating the transactions
         contemplated by this Transaction Agreement or by the Merger Agreement.



                                      -11-
<PAGE>   15




                  (i) No Vote Required. No vote of the holders of any class or
         series of Schlumberger capital stock is necessary to approve the
         issuance of Schlumberger Common Stock pursuant to this Transaction
         Agreement and the transactions contemplated hereby.

                  (j) Accounting Matters. To the best knowledge of the financial
         and accounting officers of Schlumberger prior to the date hereof,
         neither Schlumberger nor any of its Affiliates has taken any action
         that (without giving effect to any action taken or agreed to be taken
         by Camco or any of its Affiliates) would jeopardize the treatment of
         the business combination to be effected by the Merger as a pooling of
         interests for accounting purposes.

                  (k) Beneficial Ownership of Camco Common Stock. As of the date
         hereof, neither Schlumberger nor its Subsidiaries "beneficially owns"
         (as defined in Rule 13d-3 under the Exchange Act) any shares of Camco
         Common Stock.

                  (l) Material Contracts and Agreements. All material contracts
         of Schlumberger or its Subsidiaries have been included in the
         Schlumberger SEC Documents unless not required to be included pursuant
         to the rules and regulations of the SEC. Schedule 3.2(l) of the
         Schlumberger Disclosure Letter sets forth a list of all written or oral
         contracts, agreements or arrangements to which Schlumberger or any of
         its Subsidiaries or any of their respective assets are bound which meet
         the definition of material contracts set forth in Section 6.01 of
         Regulation S-K promulgated under the Securities Act and which have not
         been included in the Schlumberger SEC Documents.

                                   ARTICLE IV

                              ADDITIONAL AGREEMENTS

         4.1      Legal Conditions to Merger.

                  (a) Except as otherwise provided herein, Camco and
         Schlumberger will each take all reasonable actions necessary to comply
         promptly with all legal requirements that may be imposed on such party
         with respect to the Merger (including, without limitation, furnishing
         all information required under the HSR Act and in connection with
         approvals of or filings with any other Governmental Entity) and will
         promptly cooperate with and furnish information to each other in
         connection with any such requirements imposed upon any of them or any
         of their Subsidiaries in connection with the Merger. Each of Camco and
         Schlumberger will, and will cause its respective Subsidiaries to, take
         all actions necessary to obtain (and will cooperate with each other in
         obtaining) any consent, acquiescence, authorization, order or approval
         of, or any exemption or nonopposition by, any Governmental Entity or
         court required to be obtained or made by Camco, Schlumberger or any of
         their Subsidiaries in connection with the Merger or the taking of any
         action contemplated thereby, by the Merger Agreement or by this
         Transaction Agreement, including 


                                      -12-
<PAGE>   16



         complying with any requests or orders made by the Justice Department or
         the Federal Trade Commission in connection with the Merger.

                  (b) Each of the parties hereto shall file a premerger
         notification and report form under the HSR Act with respect to the
         Merger as promptly as reasonably possible following execution and
         delivery of this Agreement. Each of the parties agrees to use
         reasonable efforts to promptly respond to any request for additional
         information pursuant to Section (e)(1) of the HSR Act. Except as
         otherwise required by United States regulatory considerations, Camco
         will furnish to Schlumberger copies of all correspondence, filings or
         communications (or memoranda setting forth the substance thereof
         (collectively, "Company HSR Documents")) between Camco, or any of its
         respective representatives, on the one hand, and any governmental
         entity, or members of the staff of such agency or authority, on the
         other hand, with respect to this Agreement, the Merger Agreement or the
         Merger; provided; however, that (x) with respect to documents and other
         materials filed by or on behalf of Camco with the Antitrust Division of
         the Department of Justice, the Federal Trade Commission, or any state
         attorneys general that are available for review by Schlumberger, copies
         will not be required to be provided to Schlumberger and (y) with
         respect to any Camco HSR Documents (1) that contain any information
         which, in the reasonable judgment of Fulbright & Jaworski L.L.P.,
         should not be furnished to Schlumberger because of antitrust
         considerations or (2) relating to a request for additional information
         pursuant to Section (e)(1) of the HSR Act, the obligation of Camco to
         furnish any such Camco HSR Documents to Schlumberger shall be satisfied
         by the delivery of such Camco HSR Documents on a confidential basis to
         Baker & Botts, L.L.P., pursuant to a confidentiality agreement in form
         and substance reasonably satisfactory to Schlumberger. Except as
         otherwise required by United States regulatory considerations,
         Schlumberger will furnish to Camco copies of all correspondence,
         filings or communications (or memoranda setting forth the substance
         thereof (collectively, "Schlumberger HSR Documents")) between
         Schlumberger or any of its representatives, on the one hand, and any
         Governmental Entity, or member of the staff of such agency or
         authority, on the other hand, and any Governmental Entity, or member of
         the staff of such agency or authority, on the other hand, with respect
         to this Agreement, the Merger Agreement or the Merger; provided,
         however, that (x) with respect to documents and other materials filed
         by or on behalf of Schlumberger with the Antitrust Division of the
         Department of Justice, the Federal Trade Commission, or any state
         attorneys general that are available for review by Camco, copies will
         not be required to be provided to Camco, and (y) with respect to any
         Schlumberger HSR Documents (1) that contain information which, in the
         reasonable judgment of Baker & Botts, L.L.P., should not be furnished
         to Camco because of antitrust considerations or (2) relating to a
         request for additional information pursuant to Section (e)(1) of the
         HSR Act, the obligation of Schlumberger to furnish any such
         Schlumberger HSR Documents to Camco shall be satisfied by the delivery
         of such Schlumberger HSR Documents on a confidential basis to Fulbright
         & Jaworski L.L.P. pursuant to a confidentiality agreement in form and
         substance reasonably satisfactory to Camco.


                                      -13-
<PAGE>   17




                  (c) In the event that any governmental body with jurisdiction
         of this Merger shall require Schlumberger or any of its Subsidiaries to
         agree to take or not to take any action as a condition to approving or
         not objecting to the Merger, Schlumberger will take such action (i) if
         the loss in annual revenues to the Surviving Corporation would
         reasonably be expected not to exceed $75 million during the ensuing
         twelve months following the Closing, or (ii) if Schlumberger otherwise
         considers it reasonable and appropriate in the circumstances to take
         such action.

         4.2 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.

         4.3 Accounting Matters. During the period from the date of this
Transaction Agreement through the Effective Time, unless the parties shall
otherwise agree in writing, neither Schlumberger nor Camco or any of their
respective Subsidiaries shall knowingly take or fail to take any reasonable
action which action or failure to act would jeopardize the treatment of the
Merger as a pooling of interests for accounting purposes.

         4.4 Public Announcements. Schlumberger and Camco will consult with each
other before issuing any press release or otherwise making any public statements
with respect to the transactions contemplated by this Transaction 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.

         4.5 Other Actions. Except as contemplated by this Transaction Agreement
or the Merger Agreement, neither Schlumberger nor Camco shall, and neither shall
permit any of its Subsidiaries to, take or agree or commit to take or omit to
take any action that is reasonably likely to result in any of its respective
representations or warranties hereunder or under the Merger Agreement being
untrue in any material respect or in any of the conditions to the Merger set
forth in Article VI to the Merger Agreement not being satisfied.

         4.6 Advice of Changes; SEC Filings. Schlumberger and Camco shall confer
on a regular basis with each other, report on operational matters of Camco 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 Schlumberger or Camco, as the case may be. Subject to the provisions
of Section 4.1, Camco and Schlumberger 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
Transaction Agreement or the Merger Agreement and the transactions contemplated
hereby and thereby.


                                      -14-
<PAGE>   18




         4.7 Reorganization. It is the intention of Schlumberger and Camco that
the Merger will qualify as a reorganization described in Section 368(a)(1)(B) of
the Code (and any comparable provisions of applicable state law). Neither
Schlumberger nor Camco (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 (and their respective
Subsidiaries) will characterize the Merger as such a reorganization for purposes
of all Returns and other filings.

         4.8 Takeover Defenses. Schlumberger and Camco shall each take such
action with respect to any takeover provisions in its respective Certificate of
Incorporation or Bylaws or afforded it by statute to the extent necessary to
consummate the Merger on the terms set forth in the Merger Agreement.

         4.9 Letter of Camco's Accountants. Camco shall use its best efforts to
cause to be delivered to Schlumberger a letter of Arthur Andersen LLP, Camco'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 Schlumberger and
Camco, in form and substance reasonably satisfactory to Schlumberger and
customary in scope and substance for letters delivered by independent public
accountants in connection with registration statements similar to the S-4. In
connection with Camco's efforts to obtain such letter, if requested by Arthur
Andersen LLP, Schlumberger shall provide a representation letter to Arthur
Andersen LLP complying with SAS 72, if then required.


         4.10 Letter of Schlumberger's Accountants. Schlumberger shall use its
best efforts to cause to be delivered to Camco a letter of Price Waterhouse LLP,
Schlumberger'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
Camco and Schlumberger, in form and substance reasonably satisfactory to Camco
and customary in scope and substance for letters delivered by independent public
accountants in connection with registration statements similar to the S-4. In
connection with Schlumberger's efforts to obtain such letter, if requested by
Price Waterhouse LLP, Camco shall provide a representation letter to Price
Waterhouse LLP complying with SAS 72, if then required.

         4.11 Rights Agreement. Prior to the Effective Time, the Board of
Directors of Camco shall take any action (including, as necessary, amending or
terminating (but with respect to termination, only as of immediately prior to
the Effective Time) the Rights Agreement) necessary so that none of the
execution and delivery of this Transaction Agreement, the conversion of shares
of Camco Common Stock into the right to receive Schlumberger Common Stock in
accordance with Article II of this Transaction Agreement, and the consummation
of the Merger or any other transaction contemplated hereby will cause (a) the
Camco Rights to become exercisable under the Rights Agreement, (b) Schlumberger
or any of its Subsidiaries to be deemed an "Acquiring Person" (as defined in the
Rights Agreement), (c) the provisions of Section 11 or Section 13 of the Rights
Agreement to become applicable to any such event or (d) the "Distribution Date"
or the "Share Acquisition Date" (each as defined in the Rights Agreement) to
occur upon any such event, and so that the "Expiration Date" (as defined in the
Rights Agreement) of the Camco Rights will occur


                                      -15-
<PAGE>   19




immediately prior to the Effective Time. Without the prior written consent of
Schlumberger, neither the Board of Directors of Camco nor Camco shall take any
other action to terminate the Rights Agreement, redeem the Camco Rights, cause
any person not to be or become an "Acquiring Person" or otherwise amend the
Rights Agreement in a manner, or take any other action under the Rights
Agreement, adverse to Schlumberger.

         4.12 Stock Options. Schlumberger shall take all corporate action
necessary to reserve for issuance a sufficient number of shares of Schlumberger
Common Stock for delivery upon exercise of the Camco Stock Options assumed by
STC in accordance with Section 2.1(d) and Section 5.5 of the Merger Agreement.
As soon as possible after the Effective Time, Schlumberger shall file with the
SEC a registration statement on Form S-8 (or any successor form) with respect to
the shares of Schlumberger Common Stock subject to the Camco Stock Options.

                                    ARTICLE V

                              CONDITIONS PRECEDENT

         5.1 Conditions to Camco's Closing Deliveries. The obligations of Camco
under Section 5.2 hereof are subject to the conditions that the Merger Agreement
shall not have been terminated, that each of the conditions set forth in Article
VI of the Merger Agreement other than those conditions to be satisfied at the
Closing shall have been satisfied or waived as set forth therein and that each
of the following conditions shall have been satisfied or waived by Camco:

                  (a) Representations and Warranties. Each of the
         representations and warranties of Schlumberger set forth in this
         Transaction Agreement shall be true and correct in all material
         respects as of the date of this Transaction Agreement and (except to
         the extent such representations and warranties speak as of an earlier
         date) as of the Delivery Date as though made on and as of the Delivery
         Date, except where the failure to be so true and correct (without
         giving effect to the individual materiality thresholds otherwise
         contained in Section 3.2 hereof) would not have a Material Adverse
         Effect on Schlumberger (such that the aggregate of the Material Adverse
         Effect on Schlumberger hereunder exceeds $400 million) and Schlumberger
         shall have received a certificate dated the Delivery Date by a duly
         authorized officer of Schlumberger to that effect.

                  (b) Performance of Obligations of Schlumberger. Schlumberger
         shall have performed in all material respects all obligations required
         to be performed by it under this Transaction Agreement at or prior to
         the Delivery Date.

                  (c) Certifications and Opinion. Schlumberger shall have
         furnished Camco with:

                           (i) a certified copy of a resolution or resolutions
                  duly adopted by the Board of Directors or a duly authorized
                  committee thereof of Schlumberger approving this Transaction
                  Agreement and the transactions contemplated hereby; and


                                      -16-
<PAGE>   20




                           (ii) a favorable opinion, dated the Closing Date, in
                  customary form and substance, of David S. Browning, Esquire,
                  General Counsel of Schlumberger, to the effect that:

                                    (A) Schlumberger is a corporation duly
                           incorporated, validly existing and in good standing
                           under the laws of its jurisdiction of incorporation
                           and has corporate power to own its properties and
                           assets and to carry on its business as presently
                           conducted and as described in the Registration
                           Statement; and the execution and delivery of this
                           Transaction Agreement did not, and the consummation
                           of the transactions contemplated hereby will not,
                           violate any provision of Schlumberger's Certificate
                           of Incorporation or Bylaws;

                                    (B) the Board of Directors of Schlumberger
                           has taken all action required under its jurisdiction
                           of incorporation, its Certificate of Incorporation or
                           its Bylaws to authorize the execution and delivery of
                           this Transaction Agreement and the transactions
                           contemplated hereby; and this Transaction Agreement
                           is a valid and binding agreement of Schlumberger
                           enforceable in accordance with its terms, except as
                           such enforceability may be limited by bankruptcy,
                           insolvency, reorganization, moratorium or other
                           similar laws or judicial decisions now or hereafter
                           in effect relating to creditors' rights generally or
                           governing the availability of equitable relief; and

                                    (C) the Schlumberger Shares to be delivered
                           to the holders of Camco Common Stock pursuant to
                           Article II of the Merger Agreement are duly
                           authorized and when issued and delivered as
                           contemplated by the Merger Agreement will be legally
                           and validly issued and fully paid and nonassessable
                           and no stockholders of Schlumberger shall have any
                           preemptive rights with respect thereto either
                           pursuant to the organizational documents of
                           Schlumberger or under applicable law of the
                           jurisdiction of Schlumberger's organization.

                  (d) Fairness Opinion. Morgan Stanley & Co. Incorporated has
not revoked, modified or changed its opinion referred to in Section 3.1(p) of
the Merger Agreement in any manner adverse to the holders of the Common Stock of
Camco.

         5.2 Conditions to Schlumberger's Closing Deliveries. The obligations of
Schlumberger under Section 2.1 and Section 5.1 hereof are subject to the
conditions that the Merger Agreement shall not have been terminated, that each
of the conditions set forth in Article VI of the Merger Agreement other than
those conditions to be satisfied at Closing shall have been satisfied or waived
as set forth therein and that each of the following conditions shall have been
satisfied or waived by Schlumberger:


                                      -17-
<PAGE>   21




                  (a) Representations and Warranties. Each of the
         representations and warranties of Camco set forth in this Transaction
         Agreement shall be true and correct in all material respects as of the
         date of this Transaction Agreement and (except to the extent such
         representations and warranties speak as of an earlier date) as of the
         Delivery Date as though made on and as of the Deliver Date, except
         where the failure to be so true and correct (without giving effect to
         the individual materiality thresholds otherwise contained in Section
         3.1 hereof) would not have a Material Adverse Effect on Camco (such
         that the aggregate of the Material Adverse Effect on Camco hereunder
         exceeds $200 million) and Schlumberger shall have received a
         certificate dated the Delivery Date on behalf of Camco by the chief
         executive officer and chief financial officer of Camco to that effect.

                  (b) Performance of Obligations of Camco. Camco shall have
         performed in all material respects all obligations required to be
         performed by it under this Transaction Agreement at or prior to the
         Delivery Date.

                  (c) Certifications and Opinion. Camco shall have furnished
         Schlumberger with:

                           (i) a certified copy of a resolution or resolutions
                  duly adopted by the Board of Directors of Camco approving this
                  Transaction Agreement and consummation of the transactions
                  contemplated hereby; and

                           (ii) a favorable opinion, dated the Delivery Date, in
                  customary form and substance, of Ronald R. Randall, Esquire,
                  General Counsel of Camco, to the effect that:

                                    (A) the execution and delivery of this
                           Transaction Agreement did not violate any provision
                           of Camco's Certificate of Incorporation or Bylaws;
                           and

                                    (B) the Board of Directors of Camco has
                           taken all action required by the DGCL and its
                           Certificate of Incorporation or its Bylaws to
                           authorize the execution and delivery of this
                           Transaction Agreement and the transactions
                           contemplated hereby; and this Transaction Agreement
                           is a valid and binding agreement of Camco enforceable
                           in accordance with its terms, except as such
                           enforceability may be limited by bankruptcy,
                           insolvency, reorganization, moratorium or other
                           similar laws or judicial decisions now or hereafter
                           in effect relating to creditors' rights generally or
                           governing the availability of equitable relief.



                                      -18-
<PAGE>   22




                                   ARTICLE VI

                            TERMINATION AND AMENDMENT

         6.1 Termination. This Transaction Agreement shall automatically
terminate if the Merger Agreement is terminated. In addition, this Transaction
Agreement may be terminated:

                  (a) by mutual written consent of Camco and Schlumberger, or by
         mutual action of their respective Boards of Directors;

                  (b) by Schlumberger if (i) Camco shall have failed to comply
         in any material respect with any of the covenants or agreements
         contained in this Transaction Agreement to be complied with or
         performed by Camco at or prior to such date of termination (provided
         such breach has not been cured within 30 days following receipt by
         Camco of notice of such breach and is existing at the time of
         termination of this Transaction Agreement); or (ii) any representations
         and warranties of Camco contained in this Transaction Agreement shall
         not have been true when made (provided such breach has not been cured
         within 30 days following receipt by Camco of notice of such breach and
         is existing at the time of termination of this Transaction Agreement)
         or on and as of the Effective Time as if made on and as of the
         Effective 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 thresholds otherwise contained in
         Section 3.1 hereof) would not have a Material Adverse Effect on Camco
         such that the aggregate of the Material Adverse Effect on Camco exceeds
         $200 million; and

                  (c) by Camco if (i) Schlumberger shall have failed to comply
         in any material respect with any of the covenants or agreements
         contained in this Transaction 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
         Schlumberger of notice of such breach and is existing at the time of
         termination of this Transaction Agreement); or (ii) any representations
         and warranties of Schlumberger contained in this Transaction Agreement
         shall not have been true when made (provided such breach has not been
         cured within 30 days following receipt by Schlumberger of notice of
         such breach and is existing at the time of termination of this
         Transaction Agreement) or on and as of the Effective Time as if made on
         and as of the Effective 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 thresholds
         otherwise contained in Section 3.2 hereof) would not have a Material
         Adverse Effect on Schlumberger such that the aggregate of the Material
         Adverse Effect on Schlumberger exceeds $400 million.

         6.2 Effect of Termination. In the event of termination of this
Transaction Agreement by either Camco or Schlumberger as provided in Section
6.1, this Transaction Agreement shall forthwith become void and there shall be
no liability or obligation on the part of Schlumberger or


                                      -19-
<PAGE>   23




Camco under this Termination Agreement except (a) with respect to Section 7.1,
and (b) to the extent that such termination results from the willful breach by a
party hereto of any of its representations or warranties or of any of its
covenants or agreements, in each case, as set forth in this Transaction
Agreement except as provided in Section 8.9. Nothing herein shall be construed
to limit any of the rights and obligations under the Merger Agreement.

         6.3 Amendment. This Transaction 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 Camco, but, after any such approval, no
amendment shall be made which by law requires further approval by such
stockholders without such further approval. This Transaction Agreement may not
be amended except by an instrument in writing signed on behalf of each of the
parties hereto.

         6.4 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: (a) extend the time for the
performance of any of the obligations or other acts of the other parties hereto;
(b) waive any inaccuracies in the representations and warranties contained
herein or in any document delivered pursuant hereto; and (c) 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 VII

                               GENERAL PROVISIONS

         7.1 Payment of Expenses. Each party hereto shall pay its own expenses
incident to preparing for entering into and carrying out this Transaction
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 Schlumberger.

         7.2 Nonsurvival of Representations, Warranties and Agreements. None of
the representations, warranties and agreements in this Transaction Agreement or
in any instrument delivered pursuant to this Transaction 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 Section 6.2 and this
Article VI and the representations, covenants and agreements contained in
Section 4.7. The Confidentiality Agreements shall survive the execution and
delivery of this Transaction Agreement, and the provisions of the
Confidentiality Agreements shall apply to all information and material delivered
hereunder.

         7.3 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



                                      -20-
<PAGE>   24




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 Schlumberger, to:

                                    Schlumberger Limited
                                    277 Park Avenue
                                    New York, New York 10172
                                    Attention: David S. Browning, Esquire
                                    Fax: (212) 350-9457

                           with a copy to:

                                    Baker & Botts, L.L.P.
                                    910 Louisiana, Suite 3000
                                    Houston, Texas 77002
                                    Attention: Moulton A. Goodrum, Esquire
                                    Fax: (713) 229-1522

                  and (b) if to Camco, to:

                                    Camco International, Inc.
                                    7030 Ardmore
                                    Houston, Texas 77054
                                    Attention: Ronald R. Randall, Esquire
                                    Fax: (713) 749-5625

                           with a copy to:

                                    Fulbright & Jaworski L.L.P.
                                    1301 McKinney, Suite 5100
                                    Houston, Texas 77010
                                    Attention: Michael C. Conlon, Esquire
                                    Fax: (713) 651-5246

         7.4 Interpretation. When a reference is made in this Transaction
Agreement to Sections, such reference shall be to a Section of this Transaction
Agreement unless otherwise indicated. The table of contents, glossary of defined
terms and headings contained in this Transaction Agreement are for reference
purposes only and shall not affect in any way the meaning or interpretation of
this Transaction Agreement. Whenever the word "include", "includes" or
"including" is used in this Transaction Agreement, it shall be deemed to be
followed by the words "without limitation." The


                                      -21-
<PAGE>   25




phrase "made available" in this Transaction 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.

         7.5 Counterparts. This Transaction 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.

         7.6 Entire Agreement; No Third-Party Beneficiaries. This Transaction
Agreement (together with the Confidentiality Agreements, the Merger Agreement
and any other documents and instruments referred to herein) 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 is not intended to confer upon any person other than the parties hereto any
rights or remedies hereunder.

         7.7 Governing Law. This Transaction 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.

         7.8 No Remedy in Certain Circumstances. Each party agrees that, should
any court or other competent authority hold any provision of this Transaction
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
Transaction Agreement or makes this Transaction Agreement impossible to perform,
in which case this Transaction Agreement shall terminate pursuant to Article VI
hereof. Except as otherwise contemplated by this Transaction 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
4.1 hereof or did not in good faith seek to resist or object to the imposition
or entering of such order or judgment.

         7.9 Assignment. Neither this Transaction 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. Subject to the preceding sentence, this
Transaction Agreement will be binding upon, inure to the benefit of and be
enforceable by the parties and their respective successors and assigns.

         7.10 Enforcement of the Agreement. The parties agree that irreparable
damage would occur in the event that any of the provisions of this Transaction
Agreement were not performed in accordance with their specific terms or were
otherwise breached. It is accordingly agreed that the



                                      -22-
<PAGE>   26




parties shall be entitled to an injunction or injunctions to prevent breaches of
this Transaction Agreement and to enforce specifically the terms and provisions
hereof in any court of the United States located in the State of Delaware or in
the Chancery Court of the State of Delaware, this being in addition to any other
remedy to which they are entitled at law or in equity. In addition, each of the
parties hereto (a) consents to submit itself to the personal jurisdiction of any
Federal or state court sitting in Wilmington, Delaware in the event any dispute
between the parties hereto arises out of this Agreement solely in connection
with such a suit between the parties, (b) agrees that it will not attempt to
deny or defeat such personal jurisdiction by motion or other request for leave
from any such court and (c) agrees that it will not bring any action relating to
this Agreement in any court other than a Federal or state court sitting in
Wilmington, Delaware.





                                      -23-

<PAGE>   27



         IN WITNESS WHEREOF, each party has caused this Transaction Agreement to
be signed by its respective officers thereunto duly authorized, all as of the
date first written above.

                                            SCHLUMBERGER LIMITED



                                            By: /S/ VICTOR E. GRIJALVA
                                               --------------------------------
                                                    Victor E. Grijalva
                                                    Vice Chairman

                                            CAMCO INTERNATIONAL, INC.



                                            By: /S/ GILBERT H. TAUSCH
                                               --------------------------------
                                                    Gilbert H. Tausch
                                                    President and Chief 
                                                    Executive Officer

<PAGE>   1
                                                                 EXHIBIT 99.1


                                 PRESS RELEASE


FOR IMMEDIATE RELEASE: FRIDAY, JUNE 19, 1998

SCHLUMBERGER AND CAMCO ANNOUNCE MERGER AGREEMENT

New York, June 19 -- Schlumberger [NYSE:SLB] and Camco [NYSE:CAM] today
announced the signing of a definitive merger agreement by Schlumberger
Technology Corporation, a wholly-owned subsidiary of Schlumberger, and Camco,
which was unanimously approved by the boards of directors of the companies.
The combined company will offer an unmatched array of oilfield services to its
customers for reservoir optimization throughout the world.

Under the terms of the agreement, Camco shareholders will receive 1.18 newly
issued shares of Schlumberger common stock for each outstanding share of Camco
common stock.  The exchange ratio is fixed and not subject to adjustment.  The
transaction is expected to be tax free to Camco shareholders and will be
accounted for as a pooling of interests.  Based on the closing price of
Schlumberger yesterday at $69 15/16 and Camco's 38 million common shares
outstanding, the transaction is currently valued at about $3.14 billion.

Consolidated operating revenue and net income of Schlumberger and Camco would
have been approximately $11.6 billion and $1.38 billion in 1997.  The current
combined market capitalization is approximately $37 billion.  Camco will be
operated as a division within the Schlumberger Oilfield Services group.

Euan Baird, Chairman and Chief Executive Officer of Schlumberger, said, "This
combination provides an exciting opportunity to further enhance our position as
the leader in the reservoir optimization business.  The highly complementary
activities of Camco improve our capability to respond to customers' demands for
integrated solutions and to engineer systems to improve the productivity of
their oil and gas operations."

Gilbert Tausch, Chairman and Chief Executive Officer of Camco, said, "This
merger satisfies Camco's strategic plan to be able to participate in more
phases of our customers' field operations.  Camco will be able to add its
technology of production operations to the well known technology of
Schlumberger in areas of reservoir enhancement.  We have practically no overlap
of operations and have worked successfully with Schlumberger in many areas of
the world."

Schlumberger and Camco have historically been the most profitable companies in
their peer group.  Both companies have an extensive geographic presence
worldwide, exhibit an excellent cultural fit and share strengths in
relationships with customers, governments and suppliers.

The merger will enhance services for customers, broaden opportunities for
employees, and add value for shareholders.  The transaction is expected to be
accretive to earnings per share in 1999, which is anticipated to be the first
full year of combined operations.  It is subject to the approval of Camco
shareholders as well as customary regulatory approvals.  The transaction is
expected to close around the end of the third quarter of 1998.
<PAGE>   2
Schlumberger is a worldwide leader in technical services with 63,500 employees
and operations in over 100 countries.  In 1997, revenue was $10.65 billion.

Camco International Inc. is a worldwide oilfield equipment and service company
providing specialized products and services in drilling, well completion,
production and well services for the oil and gas industry.  Camco's trade names
include Camco Coiled Tubing Services, Camco Products, Camco Wireline, Hycalog,
Lasalle Engineering, Lawrence Technology, Production Operators, Reda, Reed Tool
and Site Oil Tools.

                                     # # #

For further information, contact:

Simone Crook
Director Investor Relations & Communications
Schlumberger Limited New York
Phone: (1-212) 350-9432
Email: [email protected]

Claude Suter
Investor Relations & Communications
Schlumberger Limited Paris
Phone: (33-1) 40 62 13 30
Email: [email protected]

Bruce Longaker
Vice President, Finance
Camco International Inc. - Houston
Phone: (1-713) 749-5650


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