Progressively inflated packers

Details Progressively inflated packers Progressively inflated packers

1984-04-04

1988-11-01

Massie, Jerome W.

Wells

Packers or plugs

Expanded by confined fluid from central chamber, pump or...

277 346, E21B 33127

Patent

active

047812494

ABSTRACT:
An inflatable packer construction where the inflatable elastomer element is; (1) constructed from the same type of rubber compound from end-to-end and the rubber is cured differentially from end-to-end so that inflation is from one end to the other end; (2) is constructed of rubber having different characteristics from end-to-end so that the cured rubber will inflate from one end to the other end; (3) is constructed of rubber having a release agent between one end of the rubber and a mandrel so as to release one end of the rubber first from the mandrel upon inflation; (4) is constructed of rubber having different thicknesses from end-to-end so that one end inflates sooner than the other end; or (5) is constructed of rubber with a segment of the length of the element having a releasable confining element.

REFERENCES:
patent: 2831541 (1958-04-01), Conover
patent: 3052302 (1962-09-01), Lagucki
patent: 3525393 (1970-08-01), Cobbs et al.
patent: 4372562 (1983-02-01), Carter, Jr.
patent: 4420159 (1983-12-01), Wood
patent: 4449584 (1984-05-01), Christensen
patent: 4458752 (1984-07-01), Brandell

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