EXHIBIT 5.1

                      [CONNER & WINTERS, P.C. LETTERHEAD]




                                  June 28, 2002

Parker Drilling Company
1401 Enclave Parkway, Suite 600
Houston, Texas 77077

         Re:  Parker Drilling Company
              Registration Statement on Form S-4 (the "Registration Statement")

Gentlemen:

         We have acted as counsel for Parker Drilling Company, a Delaware
corporation (the "Company"), and the Subsidiary Guarantors (defined below), in
connection with the registration under the Securities Act of 1933, as amended
(the "Securities Act"), of the proposed offering by the Company of up to
$235,612,000 in aggregate principal amount of its 10?% Senior Notes due 2009,
Series B (the "Exchange Notes") in exchange for up to $235,612,000 in aggregate
principal amount of its outstanding 10?% Senior Notes due 2009, Series A (the
"Outstanding Notes"). The Exchange Notes are to be issued under an Indenture
dated as of May 2, 2002, between the Company, the Subsidiary Guarantors and
JPMorgan Chase Bank, as Trustee (the "Indenture"). Parker Drilling Company of
Oklahoma, Incorporated; Parker Technology, Inc.; Parker Drilling Company
International Limited; Choctaw International Rig Corp; Parker Drilling Company
Limited (Nevada); Parker Drilling Company Limited (Oklahoma); Parker Drilling
Company of New Guinea, Inc.; Parker Drilling Company North America, Inc.; Parker
Drilling U.S.A. Ltd.; Parker-VSE, Inc.; DGH, Inc.; Parker Drilling Offshore USA,
L.L.C.; Quail Tools, L.L.P.; Parker USA Drilling Company; Parker Technology,
L.L.C.; Parker Drilling Offshore Corporation; Parker Drilling Offshore
International, Inc.; Anachoreta, Inc.; Pardril, Inc.; Parker Aviation, Inc.;
Parker Drilling (Kazakhstan) Ltd.; Parker Drilling Company of Niger; Parker
North America Operations, Inc.; Selective Drilling Corporation; Universal Rig
Service Corp.; Parker Drilling Management Services, Inc; and Creek International
Rig Corp are collectively referred to as the "Subsidiary Guarantors," and the
guarantees by the Subsidiary Guarantors with respect to the Exchange Notes are
collectively referred to as the "Subsidiary Guarantees."

         In reaching the conclusions expressed in this opinion, we have (a)
examined the Indenture, the Registration Statement on Form S-4, filed by the
Company with the Securities and Exchange Commission, for the registration of the
Exchange Notes and the Subsidiary Guarantees thereof (collectively referred to
as the "Securities") under the Securities Act of 1933 (the Registration
Statement, as amended at the time it becomes effective, being referred to as the
Registration Statement"), the Prospectus contained therein and such corporate
records of the Company and the Subsidiary Guarantors, certificates of public
officials and such other documents and matters as we have deemed necessary or
appropriate for the purpose of this opinion, (b) relied upon the accuracy of
facts and information set forth in all such documents and (c) assumed the
genuineness of all signatures, the legal capacity of all natural persons, the
authenticity of all documents submitted to us as originals, the conformity to
original documents submitted to us as copies and the authenticity of the
originals from which all such copies were made.


CONNER & WINTERS

Parker Drilling Company
June 28, 2002
Page 2


         Based upon the foregoing and having regard for such legal
considerations as we deem relevant, we are of the opinion that the Securities
proposed to be issued pursuant to the Exchange Offer have been duly authorized
for issuance and, subject to the Registration Statement becoming effective under
the Securities Act of 1933, and to compliance with any applicable state
securities laws, when issued, delivered and sold in accordance with the Exchange
Offer and the Indenture, will be valid and legally binding obligations of the
Company and the Subsidiary Guarantors, enforceable against the Company and the
Subsidiary Guarantors in accordance with their respective terms, except as the
enforcement thereof may be limited by bankruptcy, insolvency, reorganization,
fraudulent transfer or conveyance, moratorium or other laws affecting the
enforcement of creditors' rights generally from time to time in effect and by
general principles of equity (regardless of whether enforcement is sought in a
proceeding at equity or at law).

         We are members of the bar of the State of Oklahoma. Our opinion
expressed above is limited to the laws of the State of Oklahoma, the corporate
laws of the State of Delaware, and the federal laws of the United States of
America, and we do not express any opinion herein concerning the laws of any
other jurisdiction. As used herein, the term "corporate laws of the State of
Delaware" includes the statutory provisions of the Delaware constitution and
judicial decisions interpreting these laws as of the date of this opinion. To
the extent that the opinion expressed herein relates to matters governed by the
laws of the State of New York, we have assumed that the applicable laws of the
State of New York is the same as the applicable law of the State of Oklahoma in
al relevant aspects.

         We consent to the use of this opinion as an exhibit to the Registration
Statement and to the reference to our firm in the Registration Statement and the
Prospectus constituting a part thereof under the caption "Legal Matters." In
giving this consent, we do not thereby admit that we are in the category of
persons whose consent is required under Section 7 of the Securities Act.


                                       Very truly yours,


                                       Conner & Winters, P.C.