Releasing tool for pressure activated packer

Details Releasing tool for pressure activated packer Releasing tool for pressure activated packer

1980-07-14

1981-08-25

Novosad, Stephen J.

Wells

Packers or plugs

166120, 166187, 166196, E21B 2304, E21B 33128, E21B 33129

Patent

active

042854008

ABSTRACT:
A well bore packer which is run into a well casing on a tubing has actuator means responsive to applied fluid pressure to set anchor slips and to force a packing into engagement with the casing. The setting force is locked into the packing by a pressure balanced piston element having locking engagement with an inner body mandrel by a shear ring. A releasing tool is insertable within the bore of the body mandrel and incorporates an atmospheric pressure chamber. An operating mandrel for the releasing tool is shiftable through an increase in tubing pressure to establish communication between one side of the locking piston of the packer and the atmospheric chamber of the releasing tool, thus permitting the locking piston to shear the locking ring and free the setting forces operating on the packing elements of the packer.

REFERENCES:
patent: 3112796 (1963-12-01), Myers
patent: 3122205 (1964-02-01), Brown et al.
patent: 3131769 (1964-05-01), Rochmont
patent: 3142338 (1964-07-01), Brown
patent: 3237695 (1966-03-01), Bostock et al.
patent: 3282342 (1966-11-01), Mott
patent: 3311171 (1967-03-01), Castro
patent: 3746093 (1973-07-01), Mullins
patent: 4216827 (1980-08-01), Crowe

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