Exhibit 5.1


                                November 18, 2002



Quicksilver Resources Inc.
777 West Rosedale, Suite 300
Fort Worth, Texas 76104

                  Re:      Quicksilver Resources Inc.

Ladies and Gentlemen:

     We have  acted as  counsel  for  Quicksilver  Resources  Inc.,  a  Delaware
corporation  (the  "Company"),  in connection  with the  registration  under the
Securities Act of 1933, as amended (the "Securities Act"), of the offer and sale
of  securities  by the Company from time to time  pursuant to Rule 415 under the
Securities  Act,  including  shares of common  stock,  $0.01 par  value,  of the
Company (the "Common Stock"),  pursuant to the Company's  Registration Statement
on Form S-3  (File  No.  333-89204)  filed  with  the  Securities  and  Exchange
Commission  (the  "Commission")  on May 28, 2002 and  declared  effective by the
Commission  on June 21, 2001 (the  "Registration  Statement"),  and the proposed
offer  and  sale of  1,000,000  shares  of  Common  Stock,  plus  up to  150,000
additional  shares to cover  over-allotments  (the "Shares"),  as described in a
Prospectus  Supplement  dated  November 18, 2002 to be filed with the Commission
pursuant  to  Rule  424(b)(5)   under  the   Securities  Act  (the   "Prospectus
Supplement").

     Our opinion is limited in all respects to the  substantive  law of the Sate
of Texas,  the  federal  law of the  United  States,  and the  Delaware  General
Corporation  Law,  and we  assume  no  responsibility  as to  the  applicability
thereto, or to the effect thereon, of the laws of any other jurisdiction.

     As counsel to the Company, we have examined the Registration Statement, the
Company's Restated Certificate of Incorporation, its Bylaws, and other corporate
records of the Company and have made such other investigations as we have deemed
necessary as a basis for the opinion hereinafter set forth. For purposes of this
opinion we have assumed the genuineness of all signatures on all documents,  the
authenticity  of all documents  submitted to us as originals,  the conformity to
the originals of all documents  submitted to us as copies,  and the  correctness
and accuracy of all facts set forth in all  certificates  and documents  that we
have examined.




     Based upon and subject to the  foregoing,  we are of the  opinion  that the
Shares have been duly  authorized and, when sold and paid for in accordance with
the terms of the Underwriting Agreement,  will be validly issued, fully paid and
nonassessable.

     This  opinion  is limited to the  matters  stated  herein and no opinion is
implied  or may be  inferred  beyond the  matters  expressly  stated.  We hereby
consent to the use of our name in the  Registration  Statement under the caption
"Legal Matters" in the related  Prospectus  Supplement and consent to the filing
of this opinion as an exhibit thereto.

                                   Very truly yours,

                                   CANTEY & HANGER, L.L.P.


                                   By: /s/ Dean A. Tetirick
                                       ----------------------------------
                                       Dean A. Tetirick, Partner