Fluid pressure set and released well packer apparatus

Details Fluid pressure set and released well packer apparatus Fluid pressure set and released well packer apparatus

1978-05-18

1980-08-12

Leppink, James A.

Wells

Packers or plugs

With expanding anchor

166182, E21B 33126, E21B 33128

Patent

active

042168279

ABSTRACT:
A double grip well bore packer run into a well casing on a pipe string has actuator means responsive to hydrostatic or applied fluid pressure to set anchor slips and deform a packing into engagement with the casing, and the setting force is locked into the packing. Pressure differential from below the packer actuates hold-down elements into engagement with the casing. A shearable member is sheared by a shear piston which is normally pressure balanced but rendered unbalanced when a releasing tool is seated in the packer and operated so that fluid pressure can act on the shear piston and release the packer for retrieval from the well casing.

REFERENCES:
patent: 3054450 (1962-09-01), Baker
patent: 3122205 (1964-02-01), Brown et al.
patent: 3142338 (1964-07-01), Brown
patent: 3215205 (1965-11-01), Sizer
patent: 3282342 (1966-11-01), Mott
patent: 3785436 (1974-01-01), Davis, Jr.
patent: 3924678 (1975-12-01), Ahlstone
patent: 4044826 (1977-08-01), Croue

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