Patterson-UTI Energy to Present on March 17, 2008 at the Citi Small and Mid-Cap Conference

SNYDER, Texas, March 16 /PRNewswire-FirstCall/ — PATTERSON-UTI ENERGY, INC. today announced that it will make a presentation on March 17, 2008 at the Citi Small and Mid-Cap Conference in Las Vegas, Nevada. Representing the Company at the conference will be Mark S. Siegel, Chairman, and John E. Vollmer, Chief Financial Officer.

The presentation will be webcast live beginning at approximately 1:05 p.m. Pacific Time on March 17, 2008. To access the webcast, go to http://www.patenergy.com/ approximately 10 minutes prior to the scheduled start time. Replay of the webcast will be available through March 31, 2008 at http://www.patenergy.com/.

About Patterson-UTI

Patterson-UTI Energy, Inc. provides onshore contract drilling services to exploration and production companies in North America. The Company has approximately 350 currently marketable land-based drilling rigs that operate primarily in the oil and natural gas producing regions of Texas, New Mexico, Oklahoma, Arkansas, Louisiana, Mississippi, Colorado, Utah, Wyoming, Montana, North Dakota, South Dakota, Pennsylvania and western Canada. Patterson-UTI Energy, Inc. is also engaged in the businesses of pressure pumping services and drilling and completion fluid services. Additionally, Patterson-UTI has an exploration and production business.

Patterson-UTI Energy, Inc.

CONTACT: John E. Vollmer III, Chief Financial Officer of Patterson-UTIEnergy, Inc., +1-214-360-7800

Web site: http://www.patenergy.com/

Company News On-Call: http://www.prnewswire.com/comp/133286.html