Check valve assembly

Details Check valve assembly Check valve assembly

1980-03-07

1982-05-11

Leppink, James A.

Wells

Valves, closures or changeable restrictors

Destructible element

166326, E21B 3406

Patent

active

043288669

ABSTRACT:
An improved check valve assembly for use in a well bore comprising an outer annular housing, sliding mandrel slidably disposed within the bore of the outer annular housing, check valve seal means retained on the exterior of the outer annular housing and shear means disposed within the outer annular housing having a portion engaging the sliding mandrel and the outer annular housing.

REFERENCES:
patent: 1854518 (1932-04-01), Little
patent: 3193016 (1965-07-01), Knox
patent: 3850250 (1974-11-01), Holden et al.
patent: 4063593 (1977-12-01), Jessup
patent: 4064937 (1977-12-01), Bannington
patent: 4113012 (1978-09-01), Evans

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