Wireline-powered inflatable-packer system for deep wells

Details Wireline-powered inflatable-packer system for deep wells Wireline-powered inflatable-packer system for deep wells

1993-08-02

1995-04-11

Bagnell, David J.

Wells

Packers or plugs

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

166325, E21B 2306, E21B 33127

Patent

active

054049466

ABSTRACT:
A borehole probe containing one or more inflatable packers, usually, although not necessarily, in connection with geophysical sensors, is hung from a geophysical logging cable. The packers are inflated or deflated with liquid at ambient borehole pressure, advantageously, the liquid resident in the borehole, using a submersible, reversible electric pump which is part of the borehole packer assembly. The electric pump is powered and controlled from the surface through the interconnecting logging cable. A differential pressure actuated valve located between the pump and packer controls the flow of pumped fluid into and out of the packers. The packers may be used to control the movement of borehole fluid at any desired depth within a borehole, constrained only by the length of the interconnecting logging cable.

REFERENCES:
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patent: 2629446 (1953-02-01), Freling et al.
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patent: 2872230 (1959-02-01), Desbrandes
patent: 3066739 (1962-12-01), Saurenman et al.
patent: 3538330 (1970-11-01), Youmans
patent: 4800752 (1989-01-01), Piers
patent: 4892144 (1990-01-01), Coone
patent: 5027894 (1991-07-01), Coone et al.
patent: 5094294 (1992-03-01), Bayh, III

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