Wells – Valves – closures or changeable restrictors – Fluid operated
Patent
1985-03-20
1987-02-03
Leppink, James A.
Wells
Valves, closures or changeable restrictors
Fluid operated
166332, 166152, 166184, 166106, 137595, E21B 3410
Patent
active
RE0323438
ABSTRACT:
A retrievable well safety valve in a cased well system including a tubing string, a dual packer downhole around the tubing sealing with the casing and submersible pump in the tubing string below the packer.
REFERENCES:
patent: 2963089 (1968-12-01), Sizer
patent: 3336922 (1984-05-01), Bowyer et al.
patent: 4049052 (1977-09-01), Arendt
patent: 4287954 (1981-09-01), Krause et al.
patent: 4354554 (1982-10-01), Calhoun et al.
Otis Engineering Catalog, 1976, p. 9, "Wireline Completion Equipment and Subsurface Safety Systems".
Hilts Robert L.
Meaders Michael W.
Speegle Steven C.
Vinzant Michael B.
Bagnell David J.
Leppink James A.
Otis Engineering Corporation
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