Rig Summary

Patterson-UTI Drilling by Region      Rigs Operating
Appalachian      15
East & North Texas      12
Mid Continent      13
North Dakota      9
Rockies      9
South Texas      16
West Texas      25
Seventy Seven Energy Rigs      
All Regions      58
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.