Wells – Guide for device or conduit – Surrounding existing device or tubing
Reexamination Certificate
2007-01-02
2007-01-02
Suchfield, George (Department: 3676)
Wells
Guide for device or conduit
Surrounding existing device or tubing
C166S241100, C166S242600
Reexamination Certificate
active
10719313
ABSTRACT:
A centralizer for maintaining stand-off and/or centralizing a tubular member inside a larger diameter tubular member, for instance, in a wellbore. The centralizer is provided with bow springs that compress to a minimal diameter around the outer diameter of the sub to which the centralizer is concentrically mounted when compressive force is applied to the bow springs to facilitate insertion of the centralizer into restricted openings and/or flow control or wellhead equipment. The minimal diameter of the centralizer is provided by mounting the bow springs to a reduced diameter portion of the collar that is mounted to the sub, and even greater reduction in diameter is achieved by mounting the bow springs in notches formed in the reduced diameter portion of the collar.
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CaseTech International, Inc.
Suchfield George
Waggett, P.C. Gordon G.
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