Patent ID: 9074438
Filing Date: 2015-07-07
Classification: E21B,F17D,Y10T

Abstract:
1. An actuator, comprising: an operator disposed in an actuator employed in a well system, the operator including an axial bore, a first side in communication with a first chamber within the actuator, a second side in communication with a second chamber within the actuator, and a seal to maintain isolation of the first chamber with respect to the second chamber across the operator, the operator axially movable in response to a pressure differential between the first chamber and the second chamber; a hydraulic circuit hydraulically coupling the first chamber and the second chamber to the axial bore; a control device hydraulically coupled between the axial bore and the second chamber, whereby the control device creates a temporary pressure differential between the first chamber and the second chamber when manipulating a pressure in the axial bore, wherein manipulating the axial bore pressure is one of increasing the axial bore pressure and decreasing the axial bore pressure; and a biasing member acting against the operator to bias the operator in a desired direction.