Rig Summary

Patterson-UTI Drilling by Region      Rigs Operating
Appalachian      28
East & North Texas      18
Mid Continent      29
North Dakota      7
Rockies      12
South Texas      19
West Texas      44
Total U.S.      157
Canada      2
Total      159

The Rig Summary is intended as a service to our customers. Patterson-UTI does not warrant the accuracy or completeness of the content, which may not reflect real-time data. The Rig Summary information is not intended to be, and should not be used as, a basis for making an investment decision regarding Patterson-UTI securities.