Wells – Processes – Placing or shifting well part
Reexamination Certificate
2005-04-12
2005-04-12
Bagnell, David (Department: 3672)
Wells
Processes
Placing or shifting well part
C166S118000, C166S208000, C166S212000, C166S216000, C166S217000
Reexamination Certificate
active
06877567
ABSTRACT:
A hydraulic liner hanger comprises a tubular body and a plurality of slips disposed radially around the outer surface of the body. In one arrangement, each slip has wickers for engaging the inner surface of a surrounding string of casing. Each slip is connected to a slip ring, the slip ring also being circumferentially disposed around the outer surface of the body. At least some of the slip members are received upon a wedge surface, or cone(s). In operation, an expander tool such as a hydraulic setting tool acts upon the liner hanger, causing the slips to be expanded into frictional engagement with the surrounding string of casing. The operator is then able to slack off the weight of the liner, allowing multiple slips to engage the casing and to suspend the liner therebelow.
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Bagnell David
Gay Jennifer H
Moser Patterson & Sheridan
Weatherford / Lamb, Inc.
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