Patterson-UTI Energy, Inc. (PTEN) Chairman to Ring the NASDAQ Stock Market Opening Bell


ADVISORY, Sept. 4, 2007 (PRIME NEWSWIRE) --



 What:
 Mark S. Siegel, Chairman of Patterson-UTI Energy, Inc. (PTEN), will
 preside over the opening bell.

 Where:
 NASDAQ MarketSite - 4 Times Square - 43rd & Broadway - Broadcast Studio

 When:
 Wednesday, September 5, 2007 at 9:30 a.m. ET

 Contacts:
 John Vollmer; investrelations@patenergy.com

 NASDAQ MarketSite:
 Jolene Libretto; 646.441.5220; mobile - 347.219.9539
 Jolene.Libretto@NASDAQ.com

Feed Information:

The opening bell is available from 9:20 a.m. to 9:35 a.m. on uplink IA6 C band / transponder 24, downlink frequency 4180 horizontal. The feed can also be found on Waterfront fiber 1623. If you have any questions, please contact Jolene Libretto at (646) 441-5220.

Radio Feed:

An audio transmission of the opening bell is also available from 9:20 a.m. to 9:35 a.m. on uplink IA6 C band / transponder 24, downlink frequency 4180 horizontal. The feed can be found on Waterfront fiber 1623 as well.

Webcast:

A live webcast of the NASDAQ Opening Bell will be available at: http://www.nasdaq.com/reference/marketsite_about.stm.

Photos:

To obtain a hi-resolution photograph of the Market Open, please go to http://www.nasdaq.com/reference/marketsite_events.stm and click on the market open of your choice.

About Patterson-UTI Energy, Inc. (PTEN):

Patterson-UTI Energy, Inc. provides onshore contract drilling services to exploration and production companies in North America. The Company has approximately 345 currently marketable land-based drilling rigs that operate primarily in 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, the Company has an exploration and production business.