EXHIBIT 24
                                POWER OF ATTORNEY
        Know all by these presents, that the undersigned hereby constitutes and appoints each of Mark E. 
Schell, Drew Harding, and April Mather, or any one of them signing singly, and with full power of 
substitution, the undersigned's true and lawful attorney-in-fact to:
       
(1)        prepare, execute in the undersigned's name and on the undersigned's behalf, and submit 
to the U.S. Securities and Exchange Commission (the "SEC") a Form ID, including 
amendments thereto, and any other documents necessary or appropriate to obtain codes 
and passwords enabling the undersigned to make electronic filings with the SEC of reports 
required by Section 16(a) of the Securities Exchange Act of 1934 or any rule or regulation 
of the SEC;
(2)        execute for and on behalf of the undersigned, in the undersigned's capacity as an officer 
and/or director of Unit Corporation (the "Company"), Forms 3, 4, and 5 in accordance with 
Section 16(a) of the Securities Exchange Act of 1934 and the rules thereunder;
(3)                do and perform any and all acts for and on behalf of the undersigned which may be 
necessary or desirable to complete and execute any such Form 3, 4, or 5, complete and 
execute any amendment or amendments thereto, and timely file such form with the SEC 
and any stock exchange or similar authority; and
(4)        take any other action of any type whatsoever in connection with the foregoing which, in the 
opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally 
required by, the undersigned, it being understood that the documents executed by such 
attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in 
such form and shall contain such terms and conditions as such attorney-in-fact may 
approve in such attorney-in-fact's discretion.
       
               The undersigned hereby grants to each such attorney-in-fact full power and authority to do and 
perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise 
of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might 
or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming 
all that such attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to 
be done by virtue of this power of attorney and the rights and powers herein granted.  The undersigned 
acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the 
undersigned, are not assuming, nor is the Company assuming, any of the undersigned's responsibilities to 
comply with Section 16 of the Securities Exchange Act of 1934.
       
               This Power of Attorney shall remain in full force and effect until the undersigned is no longer 
required to file Forms 3, 4, and 5 with respect to the undersigned's holdings of and transactions in securities 
issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the 
foregoing attorneys-in-fact.
       
               IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of 
this 5th day of June, 2008.
       
                                                      /s/ Mark E. Schell        
                                                           Signature
                                                           Mark E. Schell        
                                                           Print Name