Patent ID: 9027650
Filing Date: 2015-05-12
Classification: E21B

Abstract:
1. An apparatus for use downhole, comprising: a downhole device; an actuation device configured to actuate the downhole device, the actuation device including: a chamber configured to contain a first fluid therein; a movable member that divides the chamber into a first chamber section and a second chamber section; and a flow control device configured to allow the first fluid to move between the first chamber section and the second chamber section, wherein the movable member moves in the chamber by a force supplied by a second fluid, wherein when the first fluid is moved into the first chamber section, the second fluid is supplied to activate the downhole device, and when the first fluid is moved into the second chamber section, supply of the second fluid is stopped, wherein stopping the supply of the second fluid causes the downhole device to deactivate.