Wells – Processes – Freeing stuck object – grappling or fishing in well
Reexamination Certificate
2004-12-22
2008-03-18
Bagnell, David (Department: 3672)
Wells
Processes
Freeing stuck object, grappling or fishing in well
C166S178000
Reexamination Certificate
active
07343977
ABSTRACT:
A tool for generating a force downhole comprises a body, a longitudinally movable activating member mounted to the body, and a longitudinally movable driven member also mounted to the body. The driven member is operatively associated with the activating member such that on translation of the activating member in one axial direction, the driven member is translated in an opposite axial direction. The tool may be utilised to convert a pulling action, applied by a spoolable member, to a pushing action, useful in disengaging a downhole lock.
REFERENCES:
patent: 4545434 (1985-10-01), Higgins
patent: 6345669 (2002-02-01), Buyers et al.
Great Britain Search Report from GB Application No. GB 0330070.4 dated Mar. 15, 2004.
Gledhill Richard Michael
Martin David Glen
Bagnell David
Harcourt Brad
Patterson & Sheridan L.L.P.
Weatherford / Lamb, Inc.
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