Wells – Conduit wall or specific conduit end structure – Plural – parallel – nonconcentric conduits
Patent
1997-07-29
1999-11-09
Bagnell, David
Wells
Conduit wall or specific conduit end structure
Plural, parallel, nonconcentric conduits
166369, E21B 4300
Patent
active
059795522
ABSTRACT:
A dual annulus production tool includes an upper annular seal provided in a sealing relationship with well casing bore below ground surface and above an opening in the casing, an elongated outer tubing in the casing bore extending from ground surface downward through and in a sealing relationship with the upper annular seal to an lower end of the outer tubing located below the upper annular seal, the outer tubing and casing defining an outer annulus therebetween extending from above the upper annular seal to the ground surface, an elongated inner tubing in the casing bore within the outer tubing extending from ground surface downward to a lower end of the inner tubing located below the upper annular seal, the outer and inner tubings defining an inner annulus therebetween for routing flow of fluid from below the upward annular seal upward through the inner annulus to ground surface without entering the outer annulus, and an annular housing in the casing bore below the upper annular seal and adjacent to a well production zone and being coupled to at least one of the respective lower ends of the outer and inner tubings and having fluid entry hole disposed above the opening in the casing for enabling flow of fluid from the casing bore into and upward through the inner annulus to the ground surface.
REFERENCES:
patent: 2465344 (1949-03-01), Bennett
patent: 5425416 (1995-06-01), Hammeke et al.
patent: 5579838 (1996-12-01), Michael
Michael Clarence
Miller Jeff
Bagnell David
Down Hole Injection, Inc.
Flanagan John K.
Flanagan John R.
Singh Sunil
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