Retrievable annular safety valve system

Details Retrievable annular safety valve system Retrievable annular safety valve system

1996-11-25

1998-09-22

Suchfield, George A.

Wells

Packers or plugs

With expanding anchor

166129, 166133, 166183, 166321, E21B 3410

Patent

active

058100830

ABSTRACT:
An annular safety valve system provides a retrievable annular safety valve and packer. In a preferred embodiment, an annular safety valve system has an annular safety valve connected to an upper tubing string extending to the earth's surface. The annular safety valve is initially connected to the hydraulically set packer which has no openings through an inner mandrel thereof. The safety valve is retrievable separate from the packer after the packer has been set. The safety valve is rotated relative to the packer in order to release the safety valve from the packer. As the safety valve is rotated, a setting line of the packer is severed. Other transmission lines, electrical wires, etc. may be severed as well. The safety valve may then be raised to the earth's surface with the tubing above it. A replacement safety valve is also provided for installing in the packer after the prior safety valve is retrieved.

REFERENCES:
patent: 4423782 (1984-01-01), Bowyer
patent: 4467867 (1984-08-01), Baker
patent: 4586569 (1986-05-01), Hyde
patent: 4844166 (1989-07-01), Going, III et al.
patent: 5329999 (1994-07-01), White et al.
patent: 5505263 (1996-04-01), White et al.

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