Wells – Packers or plugs – With expanding anchor
Patent
1985-12-06
1987-12-01
Novosad, Stephen J.
Wells
Packers or plugs
With expanding anchor
166139, 166140, 166196, 277235R, 277DIG6, E21B 33128, E21B 33129
Patent
active
047097582
ABSTRACT:
A packer for effecting steam treatment of a production formation of a subterranean well comprises an insulated mandrel which is slidably inserted within the bore of an inner tubular body assembly. An outer operative tubular assembly surrounds the inner assembly and mounts a plurality of drag blocks, upper and lower cone elements, a plurality of radially displaceable slips cooperating with the upper and lower cone elements, and an outer packing element fabricated by an assemblage of high temperature resistant, non-resilient seal elements formed primarily of graphite. An inner packing element is provided in the inner tubular body assembly, utilizing additional high temperature resistant, non-resilient seal elements formed primarily of graphite, which sealingly engages the insulated mandrel. The packer is set by rotation of the tubing string to position a J-pin in the axially elongated portion of a J-slot, followed by upward movement of the tubing string to effect compression of the external packing element to form a seal with the casing wall and concurrently, expansion of the slips by the upper and lower cones. A ratcheting element mounted in the same ring as the J-pin traps the axial forces within the packing element and the interengaged cones and slips.
REFERENCES:
patent: Re31933 (1985-07-01), Taylor et al.
patent: 3330357 (1967-07-01), Elliston
patent: 3391740 (1968-07-01), Edwards, Jr.
patent: 3391742 (1968-07-01), Davis
patent: 4116451 (1978-09-01), Nixon et al.
patent: 4131160 (1978-12-01), Cochran
patent: 4146093 (1979-03-01), Horvath et al.
patent: 4176715 (1979-12-01), Bigelow et al.
patent: 4559249 (1985-12-01), Arigaya et al.
Baker Oil Tools, Inc.
Neuder William P.
Novosad Stephen J.
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