Well pilot valve assembly

Details Well pilot valve assembly Well pilot valve assembly

1977-05-12

1979-04-24

Weakley, Harold W.

Fluid handling

Line condition change responsive valves

Safety cut-off requiring reset

137491, 1376256, F16K 1700

Patent

active

041506871

ABSTRACT:
Disclosed is a pilot valve assembly for preferred use in conjunction with pneumatically operated safety valves of a well head assembly, the pilot valve apparatus including an automatic trip assembly composed of a pair of bourdon tubes adapted to engage respective thumbwheels on a translatable stem; a seal carrier assembly responsively translated between first and second blocking and non-blocking positions between entrance and exit ports; a reset valve assembly for placing the pilot apparatus in its initial "untripped" position; and a manually operated trip valve assembly for independently translating the seal carrier assembly.

REFERENCES:
patent: 2327055 (1943-08-01), McMahon
patent: 3161207 (1964-12-01), McCarvell
patent: 3198207 (1965-08-01), Willis
patent: 3805837 (1974-04-01), Stampeli
patent: 3878863 (1975-04-01), Snyder
patent: 4017053 (1977-04-01), Wells

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