Patterson-UTI Drilling Strong in US

Patterson-UTI Energy has reported that for the month of December 2007, the Company had an average of 239 drilling rigs operating, including 230 rigs in the U.S. and 9 rigs in Canada.

For the three months ended December 2007, the Company had an average of 241 drilling rigs operating, including 231 rigs in the U.S. and 10 rigs in Canada.

Average drilling rigs operating reported in the Company's monthly announcements represent the average number of the Company's drilling rigs that were moving or operating under a drilling contract. The Company cautioned that numerous factors in addition to average drilling rigs operating can impact the Company's operating results and that a particular trend in the number of drilling rigs operating may or may not indicate a trend in or be indicative of the Company's financial performance. The Company intends to continue providing monthly updates on drilling rigs operating shortly after the end of each month.