Patent ID: 6739398
Filing Date: 2004-05-25
Classification: E21B

Abstract:
A tool for suspending from a running string to position a liner hanger in a casing within a wellbore, suspending a liner from the liner hanger and retrieving portions of the tool, comprising:a tool mandrel supported from the running string; a slip setting assembly about the mandrel for setting slips to engage the casing and suspend the liner hanger from the casing; and a releasing assembly for releasing from set liner hanger portions of the tool to be retrieved to the surface, the releasing assembly including a connecting member for engaging the tool with the liner hanger, a first piston hydraulically moveable in response to fluid pressure within the tool mandrel from a lock position to a release position for releasing the connecting member, a clutch for rotationally connecting the tool mandrel with the liner hanger, and a second piston moveable in response to fluid pressure within the tool mandrel for disengaging the clutch, such that right-hand rotation of the running string moves a nut downward along the mandrel so that the running string may then be picked up to disengage the tool from the liner hanger.