Operators in the U.S. added 27 rigs this week, according to the latest data from Baker Hughes. The number of rigs seeking oil rose 21 to 498, the highest level since January.

The Permian basin, home to nearly half of the nation’s active oil rigs, saw the addition of 11 rigs for a new total of 246. Meanwhile, the Eagle Ford shale and DJ-Niobrara added three rigs and six rigs, respectively.