Hydraulically operated pressure relief valve

Fluid handling – Line condition change responsive valves – Direct response valves

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Details

1375145, 188297, F16K 2110

Patent

active

059751290

ABSTRACT:
This disclosure is directed to a relief valve connected to the output manifold of a triplex mud pump. The valve body includes an inlet mud flow opening, an internal passage with a movable valve element to modulate flow, and a mud outlet opening for connection with the mud line and drill stem. The movable valve element connects to a piston rod. The rod is connected to a dual chamber, hydraulically operated force creating, air cushioned regulator which adjusts the force on the piston rod and thereby adjusts the position of the valve element.

REFERENCES:
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patent: 4531542 (1985-07-01), Looney
patent: 4617959 (1986-10-01), Yamada
patent: 4889623 (1989-12-01), Prior et al.
patent: 5685333 (1997-11-01), Skaryd

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