Patent ID: 7168493
Filing Date: 2007-01-30
Classification: E21B

Abstract:
1. A hydraulic tool assembly for a downhole tool, the assembly comprising: a body; first and second members mounted for independent movement with respect to the body; and first and second control fluid chambers associated with the respective first and second members, movement of the first member between a first position and a second position in response to an applied force displacing control fluid from the first chamber into the second chamber, to move the second member from a first position towards a second position to execute a tool function, the second control fluid chamber having a bleed valve for permitting control fluid to bleed therefrom, and the second member to return to the first position, and wherein the assembly is configured such that movement of the second member from the first position to the second position requires more than one movement cycle of the first member between its respective first position and second position.