Wells – Processes – Repairing object in well
Reexamination Certificate
2005-01-18
2005-01-18
Neuder, William (Department: 3672)
Wells
Processes
Repairing object in well
C166S384000, C166S207000
Reexamination Certificate
active
06843319
ABSTRACT:
An improved expansion assembly for an expander tool is provided. The expander tool is used to expand a surrounding tubular body within a wellbore. Accordingly, a method for expanding a surrounding tubular is also provided. The expansion assembly first comprises a piston disposed within a recess of the expander tool. The top surface of the piston closely receives a pad. The pad is held in close proximity to the top surface of the piston such that it does not rotate about a shaft. This arrangement reduces the geometric size of the expansion assembly, affording a larger inner diameter for the hollow bore of the expander tool itself. At least one reinforcement member is disposed on or within the pad to strengthen the pad during an expansion operation. The reinforcement member is fabricated from a durable material, and is arranged along the pad in the area of contact with the surrounding tubular during an expansion operation.
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U.K. Search Report, Application No. GB 0328868.5, dated Mar. 10, 2004.
Lauritzen J. Eric
Maguire Patrick G.
Plucheck Clayton
Tran Khai
Vickers, III Caswell D.
Neuder William
Weatherford / Lamb, Inc.
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