Wells – Packers or plugs – With expanding anchor
Patent
1991-02-07
1992-04-14
Novosad, Stephen J.
Wells
Packers or plugs
With expanding anchor
166 51, 166123, 166240, E21B 2306, E21B 33128, E21B 33129
Patent
active
051039028
ABSTRACT:
A retrievable packer includes a selectively releasable anti-rotation coupling lug for preventing premature setting of the packer. The lower wedge and packer mandrel are coupled together by the anti-rotation lug during running and setting operations. The anti-rotation lug is slidably received within an L-slot formed in the packer mandrel, and is selectively releasable to permit rotation of the service tool relative to the packer mandrel during retrieving operations. During run-in and retrieving operations, the anti-rotation lug is confined within a circumferentially extending portion of the L-slot, thereby limiting longitudinal travel of the packer mandrel relative to the lower wedge. The service tool can then set down on the packer for pushing the lower wedge out from under the anchor slip. The anti-rotation lug also provides a rotational lock between the slip carrier and the lower wedge, thereby preventing rotation of the slip carrier and anchor slips relative to the lower packer components during running and setting operations.
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Echols, III Ralph H.
Ross Colby M.
Griggs Dennis T.
Novosad Stephen J.
Otis Engineering Corporation
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