Reinflatable external casing packer

Details Reinflatable external casing packer Reinflatable external casing packer

1991-11-06

1993-04-13

Dang, Hoang C.

Wells

Packers or plugs

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

277 34, 277 346, E21B 33127

Patent

active

052013693

ABSTRACT:
The present invention is directed to a reinflatable external casing packer which is operable in three modes, including a filling mode of operation, a locking mode of operation, and a reinflation mode of operation. A valve system is provided which allows for selective filling and reinflation of the external casing packer in response to suspected or detected loss of pressure within the inflation chamber. The present invention may also be characterized as a method of placing a wellbore.

REFERENCES:
patent: 3437142 (1969-04-01), Conover
patent: 4082298 (1978-04-01), Samford
patent: 4260164 (1981-04-01), Baker et al.
patent: 4402517 (1983-09-01), Wood et al.
patent: 4474380 (1984-10-01), Carter et al.
patent: 4527625 (1985-07-01), Wood et al.
patent: 4586526 (1986-05-01), Reardon
patent: 4653588 (1987-03-01), White
patent: 4714117 (1987-12-01), Dech

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