Patent ID: 6202747
Filing Date: 2001-03-20
Classification: E21B

Abstract:
A downhole well apparatus comprising:a support mandrel positionable within a well casing;at least one setting piston movably disposed within the mandrel;a plurality of slips supported on the support mandrel for movement relative thereto between inwardly retracted running positions and outwardly extended set positions in response to movement of the at least one setting piston;at least one seal element disposed about the support mandrel and compressible into sealing relationship between the support mandrel and the well casing in response to movement of the at least one setting piston; anda source of setting hydraulic pressure in communication with a first surface of the setting piston and a source of unsetting hydraulic pressure in communication with a second surface of the setting piston, the setting piston setting the slips and seal element in response to setting hydraulic pressure and unsetting the slips and seal element in response to unsetting hydraulic pressure.