Barrier Valve Closure Method for Multi-zone Stimulation without Intervention or Surface Control Lines

摘要

A barrier valve is operable to close using pressure on a ball landed on a seat associated with a sleeve whose movement opens a port to allow tubing pressure to move the ball to a closed position. Another sleeve is located on the opposite side of the closure ball in the barrier valve. Actuation of the second sleeve opens another passage to allow tubing pressure above ball to rotate the valve member back to an open position with the production tubing in the production packer so that production can begin. The balls disintegrate or disappear by virtue of exposure to well fluids and/or temperatures.

主权项

1. A barrier valve assembly for a tubular string extending to a subterranean location, comprising:
a body assembly having a passage therethrough and a valve member movable for selectively closing or opening said passage; a pressure responsive actuator assembly on said body and selectively communicating with said passage on at least one side of said valve member, whereupon when pressure from said passage can reach said actuator assembly, said valve member is moved between positions where said passage is open or closed.