Downhole pressure relief valve for well pump

Details Downhole pressure relief valve for well pump Downhole pressure relief valve for well pump

1997-01-29

1998-12-01

Suchfield, George A.

Wells

Processes

Producing the well

166 685, 166105, 166322, 166325, E21B 3408, E21B 4312

Patent

active

058425217

ABSTRACT:
A well pump assembly has a pressure relief valve in the tubing string for avoiding excessive discharge pressure on a progressing cavity pump. The pressure relief valve is mounted in the string of tubing downstream of the pump. The valve assembly has a main flow passage through it for fluid being pumped by the pump through the tubing. The valve assembly has a valve seat and a spring-biased valve element which is urged by the spring against the downstream end of the valve seat to maintain the valve seat closed. The upstream end of the valve seat is in communication with the pressure in the tubing. If the tubing pressure exceeds a selected level, the valve element moves to an open position, discharging well fluid into the casing.

REFERENCES:
patent: 2300348 (1942-10-01), Dana
patent: 2644527 (1953-07-01), Baker
patent: 3472070 (1969-10-01), Chenoweth
patent: 3497004 (1970-02-01), Page, Jr.
patent: 3731742 (1973-05-01), Sizer et al.
patent: 3876003 (1975-04-01), Kislong, III
patent: 4009756 (1977-03-01), Zehren
patent: 4049057 (1977-09-01), Hewes
patent: 4320800 (1982-03-01), Upchurch
patent: 4441558 (1984-04-01), Welch et al.
patent: 5183115 (1993-02-01), Gano

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