Wells – Guide for device or conduit – Surrounding existing device or tubing
Reexamination Certificate
2006-04-11
2006-04-11
Neuder, William (Department: 3672)
Wells
Guide for device or conduit
Surrounding existing device or tubing
C175S325600
Reexamination Certificate
active
07025136
ABSTRACT:
A tool for reducing torque on work string, eg for gas or oil production, comprises an upper clamp (2), a lower clamp (3) and connection means (4), the three components formed as a unitary structure (1). The tool also comprises bearing means, preferably made from an elastomeric compound, and an annular body (7) (see FIG.4) held in place over the connection means by the clamps. The clamps may comprise spigots (5) for retaining the connection means. In a preferred embodiment the annular body is in two semi-annular components connected at one end to allow them to pivot, and the other end comprises mating castellations for receiving a fastening pin. The annular body may comprise a number of replaceable wear pads (14) which may be made of bronze or an elastomer. The unitary structure of the tool enhances the integral strength and efficiency of the clamps.
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International Search Report dated Aug. 13, 2001, for application serial No. PCT/GB01/00039.
Bain James
Haites Binnert Ruerd
Tulloch Rory McCrae
Wardley Mike
Neuder William
Patterson & Sheridan LLP
Weatherford / Lamb, Inc.
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