Well pipe float valve

Details Well pipe float valve Well pipe float valve

1986-02-20

1986-11-18

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

F16K 1506

Patent

active

046229930

ABSTRACT:
In a plunger-type oil well pipe float valve assembly permitting well fluid flow in a downward direction by a valve stem supported valve seating and unseating on a valve seat, the valve stem reciprocates in a stationary valve stem guide sleeve which supports one end portion of a coiled expansion spring surrounding the valve stem and seated at its other end on a spring retainer adjacent the valve which normally biases the valve closed. Extensions are formed on the confronting end surfaces of the spring retainer and valve stem guide sleeve for interdigitated engagement when fluid flow in a downward direction biases the valve open for preventing fluid stream induced angular rotation of the valve and its stem relative to the valve stem guide sleeve.

REFERENCES:
patent: 2858838 (1958-11-01), Scaramucci
patent: 3537518 (1970-11-01), Sullivan

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