Sliding valve float collar

Details Sliding valve float collar Sliding valve float collar

1982-09-03

1984-07-03

Leppink, James A.

Wells

Valves, closures or changeable restrictors

Longitudinally movable operator

166386, E21B 3414

Patent

active

044573774

ABSTRACT:
A float collar for use in inner string cementing operations for well casing where it is desired to open or close the float collar to control the fluids in the casing and on the exterior of the casing. The float collar comprises a float valve collar having a sliding type valve assembly located therein which is capable of being actuated as desired during the inner string well casing cementing operations.

REFERENCES:
patent: 2748873 (1956-06-01), Baker et al.
patent: 3051243 (1962-08-01), Grimmer et al.
patent: 3273650 (1966-09-01), Alexander et al.
patent: 3948322 (1976-04-01), Baker
patent: 3957114 (1978-05-01), Streich
patent: 4133386 (1979-01-01), Knox
patent: 4250966 (1981-02-01), Streich et al.

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