The Houston firm said Friday in its weekly report that 1,574 rigs were exploring for oil and 355 for gas. A year ago there were 1,761 active rigs.
Of the major oil- and gas-producing states, Oklahoma gained seven rigs, Texas increased by four, Pennsylvania was up three and Alaska and Louisiana increased one each.
Colorado declined by five, North Dakota was down four, Kansas and Wyoming dropped two apiece while New Mexico and Ohio each lost one.
Arkansas, California, Utah and West Virginia were unchanged.
The U.S. rig count peaked at 4,530 in 1981 and bottomed at 488 in 1999.