Downhole flow control apparatus, operable via surface...

Details Downhole flow control apparatus, operable via surface... Downhole flow control apparatus, operable via surface...

2008-04-29

2008-04-29

Bagnell, David J. (Department: 3672)

Wells

Valves, closures or changeable restrictors

Fluid operated

C166S323000, C166S332800, C166S386000

Reexamination Certificate

active

07363980

ABSTRACT:
Flow control apparatus, for placement in a downhole location in the tubing string of a well. The apparatus comprises a valve element and a lock element. Application and removal of annulus pressure (on the annulus between the tubing and the casing) permits the apparatus to be cycled between a sensitive-to-flow mode, in which it opens to permit fluids to be injected down the tubing into a subsurface formation, but closes to prevent fluid backflow from the subsurface formation into the tubing; and an insensitive-to-flow mode, in which the apparatus is open to permit unimpeded fluid flow in either direction.

REFERENCES:
patent: 3986554 (1976-10-01), Nutter
patent: 4467867 (1984-08-01), Baker
patent: 4926945 (1990-05-01), Pringle et al.
patent: 4991624 (1991-02-01), Fowler et al.
patent: 5861562 (1999-01-01), Pringle et al.
patent: 5996687 (1999-12-01), Pringle et al.
patent: 6070608 (2000-06-01), Pringle
patent: 6237683 (2001-05-01), Pringle et al.
patent: 6241015 (2001-06-01), Pringle et al.
patent: 6450541 (2002-09-01), Bakke
patent: 6732803 (2004-05-01), Garcia et al.
patent: 7246668 (2007-07-01), Smith
patent: 7270191 (2007-09-01), Drummond et al.
patent: 2003/0079880 (2003-05-01), Deaton et al.
patent: 2004/0007365 (2004-01-01), Hill et al.
patent: 2006/0157255 (2006-07-01), Smith
patent: 2007/0137869 (2007-06-01), MacDougall et al.
patent: 2007/0215352 (2007-09-01), Shaw et al.
patent: 2007/0227738 (2007-10-01), Dennistoun et al.

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