Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1985-02-25
1986-03-18
Scott, Samuel
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
251325, 166318, 166319, 166321, F16K 3112
Patent
active
045761965
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 of the shuttle type and 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 apparatus to be used with well tools in which annulus and tubing pressure must be equalized. A plug selectively inserted within the valve apparatus prevents the flow of fluids through the conduit in one direction and permits the build up of said fluid pressure. An annular fluid bypass does permit flow around the plug when the valve is shifted to the open position. An annular elastomeric sealing mass cooperates with a relatively movable annular ridge to provide sealing action for the valving apparatus.
REFERENCES:
patent: 2311212 (1943-02-01), Coberly
patent: 3193016 (1965-07-01), Knox
patent: 3750752 (1973-08-01), Mott
patent: 4316504 (1982-02-01), Baker et al.
patent: 4332298 (1982-06-01), Kuus et al.
patent: 4481973 (1984-11-01), O'Brien et al.
Ross Richard J.
Speller David J.
Baker Oil Tools, Inc.
Flanigan Allen J.
Scott Samuel
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