公开(公告)号：US11053774B2

公开(公告)日：2021-07-06

申请号：US16876462

申请日：2020-05-18

申请人： Baker Hughes, LLC

发明人： Michael H. Johnson ,  Todd C. Jackson

IPC分类号： E21B34/14 ,  E21B23/00 ,  E21B34/08 ,  E21B34/10

摘要： An operating system for a barrier valve or safety valve is responsive to increments in annulus or tubing pressure. An indexing device controls valves that selectively direct pressure applied to one side of an operating piston or the other for attaining the open and closed positions of the barrier valve. One such indexing device can be a j-slot. Other devices that operate a pair of hydraulic valves in tandem for pressure direction to one side of an actuation piston or another are contemplated. The system needs no electric power and there are no control lines needed to run below the production packer in the case of using annulus pressure to actuate the piston or at all if access to tubing pressure is provided from the vicinity of the barrier valve components.