Unloading injection control valve

Details Unloading injection control valve Unloading injection control valve

1983-09-26

1985-11-12

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Fluid operated

166325, 166321, E21B 3410

Patent

active

045522189

ABSTRACT:
A valving apparatus for use in controlling the fluid pressure in a subterranean well conduit and in the annulus surrounding the conduit is disclosed. The valving apparatus is shiftable between a closed position and an open position allowing flow within the tubing by the application of fluid pressure in the tubing above the valve. Pressure equalization below the valve is provided when the valve is in the closed position thus permitting the tool to be used with well tools in which annulus and tubing pressure must be equalized. A plug located within the valve prevents the flow of fluids through the conduit in either direction. An annular fluid bypass does permit flow around the plug when the valve is in the open position.

REFERENCES:
patent: 2338369 (1944-01-01), Williams et al.
patent: 3105553 (1963-10-01), Chisholm
patent: 3850250 (1974-11-01), Holden et al.

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