公开(公告)号：US20180202475A1

公开(公告)日：2018-07-19

申请号：US15409367

申请日：2017-01-18

Applicant: General Electric Company

Inventor： Bodhayan Dev ,  Andrew Thomas Cross ,  Daniel Alan Brue ,  Brian Paul Reeves ,  Deepak Trivedi

IPC: F15B15/28 ,  F15B11/10 ,  F15B1/027 ,  E21B43/12 ,  E21B34/06

CPC classification number: F15B9/08 ,  E21B34/10 ,  E21B43/129 ,  F15B15/1476 ,  F15B2211/424 ,  F15B2211/7053 ,  F15B2211/7725

Abstract: A hydraulic actuator for a downhole pump system includes a piston housing having a head end and a base end. A drive piston is movable within the piston housing between a first piston position proximate to the head end and a second piston position proximate to the base end. The hydraulic actuator includes a control valve that translates between a first control valve position in which fluid is directed into the base end and a second control valve position in which fluid is directed into the head. When the piston moves to the first piston position, a mechanical positon feedback system translates the control valve from the first control valve position to the second control valve position. When the piston moves to the second piston position, the mechanical positon feedback system translates the control valve from the second control valve position to the first control valve position.