| US 7,591,319 B2 | ||
| Gas activated actuator device for downhole tools | ||
| Yang Xu, Houston, Tex. (US) | ||
| Assigned to Baker Hughes Incorporated, Houston, Tex. (US) | ||
| Filed on Sep. 18, 2006, as Appl. No. 11/522,693. | ||
| Prior Publication US 2008/0066931 A1, Mar. 20, 2008 | ||
| Int. Cl. E21B 23/00 (2006.01) | ||
| U.S. Cl. 166—381 [166/63; 166/319; 166/325; 166/321] | 18 Claims |
| 17. A method of selectively actuating a downhole tool, the method comprising the steps of:
(a) providing a downhole tool with a piston within a chamber having a gas releasing material located therein on one side of
the piston, the gas releasing material being in fluid communication with a port extending to an exterior portion of the downhole
tool;
(b) lowering the tool into a wellbore and contacting the gas releasing material with a wellbore fluid flowing through the
port, the wellbore fluid being capable of causing release of a gas from the gas releasing material; and
(c) capturing the gas within the chamber and creating a pressure differential across the piston, causing the piston to move
and actuate the downhole tool.
|