Drilling System with Flow Control Valve

摘要

A technique facilitates drilling of wellbores with a steerable system having a plurality of pads which may be selectively actuated in a lateral direction to apply a side force. Application of the side force is used to steer a drill bit. A valve system is positioned to control delivery of actuating fluid under pressure to individual pads in a manner that enables steering of the drill bit. The valve system allows drilling along a desired curve by controlling the flow of actuating fluid under pressure to specific steering pads at specific angular positions. The valve system also allows drilling along a desired trajectory by preventing exposure of the pads to the pressurized actuating fluid.

主权项

1. A method for drilling, comprising:
coupling a drill bit to a rotary steerable system having a plurality of actuators; delivering actuating fluid to the rotary steerable system to enable actuation of the plurality of actuators; positioning a valve system, having a rotor, a blind, and a stator, in the flow path of the actuating fluid moving toward the plurality of actuators; controlling delivery of the actuating fluid to specific actuators at specific rotational positions via relative rotation of the rotor and the stator; causing relative rotation of the rotor and the blind via a control device to selectively allow or block flow of actuating fluid to the stator; and operating the control device independently of the flow of actuating fluid.