Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature
Patent
1982-04-27
1983-11-08
Purser, Ernest R.
Wells
Means for perforating, weakening, bending or separating pipe...
With disparate below ground feature
166120, 166134, 166212, E21B 2900, E21B 2308
Patent
active
044136773
ABSTRACT:
A well packer which is anchored downhole within the bore of a casing string by opposing slips. The well packer is hydraulically set. One embodiment of the invention allows the packer to be released from its downhole location by cutting the packer mandrels below the packing elements. The invention is particularly adapted for use with a dual string well packer. However, the anchoring and releasing mechanism of the present invention can be readily adapted for use with a single string well packer. Use of the present invention with a dual string packer is particularly desirable because it allows combining the features of hydraulic setting downhole, opposing slips for better resistance to differential pressure in either direction, and selective releasing of the packer from the downhole location.
REFERENCES:
patent: 2711795 (1955-06-01), Ragan
patent: 3167127 (1965-01-01), Sizer
patent: 3215207 (1965-11-01), Sizer
patent: 3275079 (1966-09-01), Crow
patent: 3374837 (1968-03-01), Page et al.
patent: 3381752 (1968-05-01), Elliston
patent: 3391741 (1968-07-01), Elliston
patent: 3410348 (1968-11-01), Page
patent: 4156460 (1979-05-01), Crowe
patent: 4236734 (1980-12-01), Ahangarzadeh
Composite Catalog of Oil Field Equipment and Services 34th Revision (1980-1981) vol. 4, pp. 5972 and 6085.
Otis Wireline Subsurface Flow Controls & Related Service Equipment Catalog (OEC 5121c), pp. 14, 15, 17, 25 and 119.
Bui Thuy M.
Felger Thomas R.
Otis Engineering Corporation
Purser Ernest R.
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