Wells – Packers or plugs – Expanded by confined fluid from central chamber – pump or...
Patent
1989-12-11
1990-10-16
Dang, Hoang C.
Wells
Packers or plugs
Expanded by confined fluid from central chamber, pump or...
166317, 166321, E21B 33127, E21B 3406
Patent
active
049628127
ABSTRACT:
Existing inflatable packers employ a three valve system for controlling the application of tubing pressure to the interior of an inflatable packing element surrounding the tubing. The three valves of such system are disposed in chordal relationship in the tubular wall of a valve collar which is secured to one end of the inflatable packing element. The valves employed are respectively an inflation initiating valve, a check valve and an inflate limit valve which are serially connected insofar as fluid flow is concerned. Because of the configuration of the flow passages, damage caused by fluid flow is much more severe on the check valve and inflate limit valve. Since no increase in diameter of the check and inflate limit valve can be tolerated, a duplicate set of such valves are provided in the tubular wall of the valve collar with the two sets of check valves and inflate limit valves connected in parallel to essentially double the effective flow area through such valves.
REFERENCES:
patent: Re32345 (1987-02-01), Wood
patent: 4260164 (1981-04-01), Baker et al.
patent: 4402517 (1983-09-01), Wood et al.
patent: 4421165 (1983-12-01), Szarka
patent: 4474380 (1984-10-01), Carter, Jr.
patent: 4577696 (1986-03-01), Suman
patent: 4586526 (1986-05-01), Reardon
patent: 4653588 (1987-03-01), White
patent: 4711301 (1987-12-01), Stringfellow
Baker Service Tools brochure entitled "UNIT 4259", Mar. 15, 1988, pp. 1-20.
Baker Hughes Incorporated
Dang Hoang C.
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