Annulus pressure referenced circulating valve

Details Annulus pressure referenced circulating valve Annulus pressure referenced circulating valve

1998-10-05

2000-11-14

Suchfield, George

Wells

Processes

Operating valve, closure, or changeable restrictor in a well

137 6823, 166323, 166386, E21B 3410

Patent

active

061455954

ABSTRACT:
A circulating valve and associated methods of using same provide control of fluid flow within a subterranean well. In a described embodiment, a circulating valve includes a fluid pressure storage chamber in fluid communication with the exterior of the valve. When positioned in a wellbore, fluid pressure in an annulus between the valve and the wellbore is stored in the storage chamber. A subsequent, relatively rapid, increase in the annulus fluid pressure causes the valve to operate.

REFERENCES:
patent: 4324293 (1982-04-01), Hushbeck
patent: 4420044 (1983-12-01), Pullin et al.
patent: 4691779 (1987-09-01), McMahan et al.
patent: 4896722 (1990-01-01), Upchurch
patent: 5050681 (1991-09-01), Skinner
patent: 5180015 (1993-01-01), Ringgenberg et al.
patent: 5209303 (1993-05-01), Barrington
patent: 5482119 (1996-01-01), Manke et al.
patent: 5984014 (1999-11-01), Poullard et al.
Systems Engineering Bulletin, dated Oct. 9, 1990.
LPR-N Description, undated.
Select Tester Valve brochure, dated Jul. 21, 1998.

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