EXHIBIT 99.1



                                      PROXY
                            TMBR/SHARP DRILLING, INC.
           THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS

         The undersigned hereby appoints Thomas C. Brown and David N. Fitzgerald
as Proxies, each with the power to appoint his substitute, and hereby authorizes
them to represent and to vote, as designated below, all the shares of common
stock, par value $.10 per share of TMBR/Sharp Drilling, Inc. held of record by
the undersigned on _______________, 2003 at the special meeting of shareholders
to be held on ___________________, 2003 or any adjournment or postponement
thereof.

THIS PROXY WHEN PROPERLY EXECUTED WILL BE VOTED IN THE MANNER DIRECTED HEREIN BY
THE UNDERSIGNED SHAREHOLDER. IF NO DIRECTION IS MADE, THIS PROXY WILL BE VOTED
FOR THE PROPOSALS.

1.       Proposal to approve the Agreement and Plan of Merger, dated May 26,
         2003, by and among Patterson-UTI Energy, Inc., Patterson-UTI
         Acquisition, LLC and TMBR/Sharp Drilling, Inc., and approval of the
         transactions contemplated thereby, including the merger, pursuant to
         which TMBR/Sharp Drilling, Inc. will be merged with and into
         Patterson-UTI Acquisition, LLC, a Texas limited liability company and
         wholly-owned subsidiary of Patterson-UTI Energy, Inc, and each share of
         TMBR/Sharp Drilling, Inc. common stock, $.10 par value per share
         (except those shares owned directly or indirectly by Patterson-UTI
         Energy, Inc. or TMBR/Sharp Drilling, Inc. and those shares owned by
         dissenting shareholders), will be converted into the right to receive
         $9.09 in cash and 0.312166 of a share of common stock, $0.01 par value
         per share, of Patterson-UTI Energy, Inc.

         [ ] FOR                     [ ] AGAINST                 [ ]  ABSTAIN


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2.       Proposal to approve the adjournment of the special meeting of
         shareholders to a date not later than _______ __, 2003.

         [ ] FOR                     [ ] AGAINST                 [ ]  ABSTAIN


                                                --------------------------------
                                                Signature

Dated: ____________ ___, 2003
                                                --------------------------------
                                                Signature, if held jointly

Please date the proxy and sign exactly as name appears hereon. When shares are
held by joint tenants, both should sign. When signing as attorney, executor,
administrator, trustee or guardian, please give full title as such. If a
corporation, please sign in full corporate name by the President or other
authorized officer. If a partnership, please sign in partnership name by an
authorized person.