Patent ID: 8757273
Filing Date: 2014-06-24
Classification: E21B,Y10T

Abstract:
1. A hydraulically actuatable sleeve valve comprising: a tubular segment including a wall defining therein an inner bore; a port through the wall of the tubular segment; a sleeve supported by the tubular segment and installed to be axially moveable relative to the tubular segment from a first position covering the port to a second position and to a third position away from a covering position over the port, the sleeve including a first piston face open to tubing pressure and a second piston face open to annular pressure, such that a pressure differential can be set up between the first piston face and the second piston face to drive the sleeve toward a low pressure side from the first position into the second position with the sleeve continuing to cover the port; and a driver to move the sleeve from the second position into the third position, the driver being unable to move the sleeve until the pressure differential is substantially dissipated, wherein the sleeve moves in first axial direction from the first position to the second position and reverses to move in a direction opposite the first axial direction when moving from the second position to the third position.