Wells – Expansible anchor or casing – Spring set
Reexamination Certificate
2005-11-29
2005-11-29
Suchfield, George (Department: 3676)
Wells
Expansible anchor or casing
Spring set
C166S206000, C166S216000, C166S241100, C166S242100, C166S243000
Reexamination Certificate
active
06968897
ABSTRACT:
A tool is provided for preventing the rotation of a downhole tool or rotary pump stator, the tool comprising a tubular housing and a jaw which is biased radially outwardly from the tool to engage the casing wall for arresting tool rotation and providing significant stabilization of a rotary pump. In doing so, the tool housing moves oppositely to rest against the casing opposite the jaw. The tool housing and the downhole tool are thereby restrained and stabilized by the casing wall. The tool's jaw is released by opposite tool rotation. Preferably, the jaw is biased outwardly from the tool housing to a casing-engaging position by a torsional member, housed along the axis of the hinge of the jaw. The tool is released from the casing by opposite tool rotation which increasingly compresses the jaw toward the housing, twisting the torsional member into torsion, which then acts to urge the jaw outwardly again. Overextension of the jaw during assembly is prevented using cooperating stops in the jaw and the housing.
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Doyle John P.
Tessier Lynn P.
Weber James L.
Goodwin Sean W.
MSI Machineering Solutions Inc.
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