Safety check valve

Details Safety check valve Safety check valve

1990-10-22

1992-02-11

Nilson, Robert G.

Fluid handling

Destructible or deformable element controlled

Destructible element

137498, 1375195, 166 84, 166328, E21B 1700, E21B 3306

Patent

active

050868020

ABSTRACT:
A safety check valve for use with a pumping unit for an oil well includes a ball housing in communication with a valve housing, a ball contained in the ball housing moving into the valve housing upon the breakage of a polished rod, whereby the ball seats upon a seating surface and seals off the oil well from the atmosphere.

REFERENCES:
patent: H438 (1988-03-01), Viksne
patent: 3424247 (1969-01-01), Lee
patent: 4069840 (1978-01-01), Brown
patent: 4070239 (1978-01-01), Bevilacqua
patent: 4109713 (1978-08-01), Clow
patent: 4266605 (1981-05-01), LaBorde

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