Wells – Valves – closures or changeable restrictors – Longitudinally movable operator
Reexamination Certificate
2011-03-15
2011-03-15
Neuder, William P (Department: 3672)
Wells
Valves, closures or changeable restrictors
Longitudinally movable operator
C166S324000
Reexamination Certificate
active
07905292
ABSTRACT:
A pressure equalizing tool can be run into a downhole tool on wireline or coiled tubing preferably and temporarily secured before being actuated to separate two components in a downhole tool that are in a sealing relation but are configured to be temporarily movable so as to allow pressure equalization before the downhole component is actuated. Once pressure is equalized the equalizing tool is released, usually with an applied pick up force and the downhole tool being equalized as to differential pressure can be operated with the preexisting actuation parts that are on the downhole tool. In a preferred embodiment the downhole tool is a ball valve and the equalizing tool is temporarily secured to the ball valve housing to temporarily part the ball from the uphole seat to equalize an annular space around the ball with tubing pressure. The ball is allowed to go back to contact with the seat when the equalizing tool is released and removed from the tubing.
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Bane Darren E.
Beall Clifford H.
May Michael J.
Sloan James T.
Baker Hughes Incorporated
Neuder William P
Rosenblatt Steve
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