February 8, 2005

Tulsa, Oklahoma . . . Unit Corporation (NYSE – UNT) announced today that it will
participate in EnerCom Inc.’s Oil Services Conference III, which will be held February 17th and
18th in San Francisco. Unit’s presentation will be broadcast live on the Internet on Thursday,
February 17th at 9:00 a.m. Pacific Time. Listeners may access webcast via the Company’s
website at www.unitcorp.com.

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Unit Corporation is a Tulsa-based, publicly held energy company engaged through its
subsidiaries in oil and gas exploration, production, contract drilling and natural gas gathering and processing. Unit’s Common Stock is listed on the New York Stock Exchange under the symbol UNT. For more information about Unit Corporation, visit our website at http://www.unitcorp.com.