Patent Number: 6,253,857

Title: Downhole hydraulic power source

Abstract: Apparatus and corresponding methods are disclosed for controlling operation of well tools within a subterranean well. In a described embodiment, a remotely controllable actuator includes a pressurized fluid source and a chamber containing gas at a relatively low pressure. The actuator is operated by alternately connecting each of two chambers of the actuator to one of the low pressure chamber and the pressurized fluid source. In another described embodiment, a fluid containing chamber is connected to a low pressure chamber of an actuator to thereby bias one member to displace relative to another member.

Inventors: Gano; John C. (Carrollton, TX)

Assignee: Halliburton Energy Services, Inc.

International Classification: E21B 33/12 (20060101); E21B 33/124 (20060101); E21B 019/00 ()

Expiration Date: 07/03/2018