Pumps – Expansible chamber type – Having pumping chamber pressure responsive distributor
Patent
1979-06-21
1981-03-31
Freeh, William L.
Pumps
Expansible chamber type
Having pumping chamber pressure responsive distributor
137512, 137 1, 417545, F04B 2106, F04B 3910
Patent
active
042590418
ABSTRACT:
The invention provides a high flow rate standing valve for oil wells of the type employing a plurality of check valve units disposed in parallel between inlet and outlet passages, the flow area of the inlet or outlet passage each being not in excess of the total flow areas of the individual check valves so that no significant pressure drop is produced by fluid flow through the check valves in their open position. Specifically, the invention provides an improved configuration for such standing valves permitting the convenient manufacture and assembly of the valve components. In a modification of the invention, the standing valve housing is constructed so that its lower end is mounted on and co-operates with a conventional well safety valve.
REFERENCES:
patent: 961820 (1910-06-01), Waitt
patent: 1669130 (1928-05-01), Jenson
patent: 1809814 (1931-06-01), Schutt
patent: 2812721 (1957-11-01), Coberly
patent: 2902049 (1959-09-01), Ilfrey
patent: 2999464 (1961-09-01), Coberly
patent: 3078804 (1963-02-01), McArthur
patent: 3174437 (1965-03-01), Street
Freeh William L.
Kobe Inc.
Norvell, Jr. William C.
LandOfFree
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