E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/65
E21B 33/126 (2006.01) E21B 33/127 (2006.01) E21B 34/06 (2006.01)
Patent
CA 2031168
BSTH B6511 [blb:ls ?D#4:D72] VALVING SYSTEM FOR INFLATABLE PACKERS ABSTRACT OF THE DISCLOSURE 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 se- cured 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 configura- tion 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.
Baker Hughes Incorporated
Smart & Biggar
LandOfFree
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