The Houston firm said Friday 467 rigs sought oil and 104 explored for natural gas amid depressed energy prices. A year ago, 1,456 rigs were active.
Among major oil- and gas-producing states, Texas declined by 19 rigs, Oklahoma dropped eight, Louisiana dropped five, Pennsylvania lost three, North Dakota, Utah and Wyoming each declined by two and Ohio dropped by one.
Alaska, Arkansas, California, Colorado, Kansas, New Mexico and West Virginia were all unchanged.
The U.S. rig count peaked at 4,530 in 1981 and bottomed at 488 in 1999.