Float valve assembly for downhole tubulars

Details Float valve assembly for downhole tubulars Float valve assembly for downhole tubulars

E - Fixed Constructions

21

B

E21B 34/12 (2006.01) E21B 21/10 (2006.01) E21B 34/14 (2006.01)

Patent

CA 2351159

A check valve assembly for the bottom of a casing string with increased open area is provided. Multiple check valves are provided are provided for assurance of ultimate closure. Bypass flow paths are available during run in that increase the normal available open area from about 3 square inches to a range of about 10 square inches and even higher. Components freely float during run in to provide the greater open area and are subsequently repositioned with known techniques of dropping a ball and pressurization when the casing has reached the desired depth.

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