Patent ID: 9631432
Date: 2017-04-25
CPC Classifications: E21B

Claim:
1. A method for drilling a borehole, comprising: providing a drill bit at an end of a collar having an internal flow passage: rotatably positioning the collar within a steering sleeve to which a plurality of steering members is mounted for selective lateral motion with respect to the steering sleeve; while maintaining the steering sleeve in a rotationally stationary position with respect to the borehole, rotating the collar and the drill bit to perform a drilling operation; and adjusting a drilling orientation of the collar and the drill bit by routing drilling fluid from the internal flow passage to at least one select steering member to cause the selective lateral motion while the steering sleeve remains in the rotationally stationary position, wherein adjusting comprises moving a valve sleeve to selectively control flow of fluid from the internal flow passage to specific actuators associated with specific steering members.