Wells – Packers or plugs – With expanding anchor
Patent
1982-10-21
1985-03-19
Novosad, Stephen J.
Wells
Packers or plugs
With expanding anchor
166134, 166387, E21B 2300
Patent
active
045053324
ABSTRACT:
There is disclosed a dual well string, hydraulically operated, retrievable packer in which one mandrel connectible with one well string is releasably connected to the body means of the packer to permit it to be lowered therewith, and the other mandrel connectible to the other well string is vertically reciprocable with respect to the body means and thus with respect to the first-mentioned mandrel. The packing element and slip assembly of the packer are supported on and carried about a first body section, and a second body section includes an expander plate which is movable relative to the first body section to expand the packing element and the slip assembly into engagement with the well bore by means of a hydraulically actuated mechanism including pistons reciprocable within cylinders formed in the first body section and connected to the expander plate by means of a pair of rods. One such rod has a through bore which permits circulation between a tubular member connected to its upper end and the annulus within the well bore beneath the packer, and the other rod has a bore which is open at its lower end to permit the supply and exhaust of hydraulic fluid to and from the cylinders.
REFERENCES:
patent: 3098524 (1963-07-01), Brown
patent: 3211226 (1965-10-01), Myers et al.
patent: 3299959 (1967-01-01), Brown
patent: 3414058 (1968-12-01), De Rochemont
patent: 3658127 (1972-04-01), Crochran et al.
patent: 4311195 (1982-01-01), Mullins
Composite Catalog of Oil Field Equipment and Services, p. 865, 1982-1983.
Akkerman Neil H.
Mills Aubrey C.
AVA International Corporation
Bui Thuy M.
Novosad Stephen J.
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