Wells – Processes – Perforating – weakening – bending or separating pipe at an...
Reexamination Certificate
2008-07-22
2008-07-22
Neuder, William P (Department: 3672)
Wells
Processes
Perforating, weakening, bending or separating pipe at an...
C166S055000, C166S207000, C166S380000
Reexamination Certificate
active
07401650
ABSTRACT:
Radially expanding a tubular such as a liner or casing, especially in a downward direction. The apparatus includes at least one driver device such as a piston that is typically fluid-actuated, and an expander device is attached to the or each driver device. Actuation of the or each driver device causes movement of the expander device to expand the tubular. One or more anchoring devices, which may be radially offset, are used to substantially prevent the tubular from moving during expansion thereof.
REFERENCES:
patent: 3712376 (1973-01-01), Owen et al.
patent: 6029748 (2000-02-01), Forsyth et al.
patent: 7185701 (2007-03-01), Mackenzie
E2 Tech Limited
Neuder William P
Patterson & Sheridan L.L.P.
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