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                                                                   EXHIBIT 10.11


                            FORM OF LOCK UP AGREEMENT


                                                                 June ____, 2001


W-H Energy Services, Inc.
10370 Richmond Avenue, Suite 990
Houston, Texas   77042

Credit Suisse First Boston Corporation
Deutsche Banc Alex. Brown
UBS Warburg LLC
Simmons & Company International

c/o  Credit Suisse First Boston Corporation
     Eleven Madison Avenue
     New York, NY 10010-3629

Dear Sirs:

                  As an inducement to the Underwriters to execute the
Underwriting Agreement, pursuant to which an offering will be made that is
intended to result in an orderly market for the common stock (the "SECURITIES")
of W-H Energy Services, Inc., and any successor (by merger or otherwise)
thereto, (the "COMPANY"), the undersigned hereby agrees that from the date
hereof and until 90 days after the public offering date set forth on the final
prospectus used to sell the Securities (the "PUBLIC OFFERING DATE") pursuant to
the Underwriting Agreement, to which you are or expect to become parties, the
undersigned will not offer, sell, contract to sell, pledge or otherwise dispose
of, directly or indirectly, any shares of Securities or securities convertible
into or exchangeable or exercisable for any shares of Securities, enter into a
transaction which would have the same effect, or enter into any swap, hedge or
other arrangement that transfers, in whole or in part, any of the economic
consequences of ownership of the Securities, whether any such aforementioned
transaction is to be settled by delivery of the Securities or such other
securities, in cash or otherwise, or publicly disclose the intention to make any
such offer, sale, pledge or disposition, or to enter into any such transaction,
swap, hedge or other arrangement, without, in each case, the prior written
consent of Credit Suisse First Boston Corporation. In addition, the undersigned
agrees that, without the prior written consent of Credit Suisse First Boston
Corporation, it will not, during the period commencing on the date hereof and
ending 90 days after the Public Offering Date, make any demand for or exercise
any right with respect to, the registration of any Securities or any security
convertible into or exercisable or exchangeable for the Securities.

                  Any Securities received upon exercise of options granted to
the undersigned will also be subject to this Agreement. Any Securities acquired
by the undersigned in the open market will not be subject to this Agreement. A
transfer of Securities to a family member or trust may be made, provided the
transferee agrees to be bound in writing by the terms of this Agreement.

                  In furtherance of the foregoing, the Company and its transfer
agent and registrar are hereby authorized to decline to make any transfer of
shares of Securities if such transfer would constitute a violation or breach of
this Agreement.

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                  This Agreement shall be binding on the undersigned and the
successors, heirs, personal representatives and assigns of the undersigned. This
Agreement shall lapse and become null and void if the Public Offering Date shall
not have occurred on or before ___________, 2001.


                                      Very truly yours,



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