Inverse differential casing cementing float valve

Details Inverse differential casing cementing float valve Inverse differential casing cementing float valve

1985-05-02

1986-10-07

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Fluid operated

166325, E21B 3406

Patent

active

046153942

ABSTRACT:
The inverse differential fill-up casing cementing float valve comprises an annular valve housing, back pressure valve assembly, a first differential pressure check valve assembly, a second differential pressure check valve assembly, and cement filler material to retain the valve assemblies within the valve housing.

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patent: 3481397 (1969-12-01), Baker
patent: 4474241 (1984-10-01), Freeman

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