Pumps – Expansible chamber type – Pressure responsive distributor opened responsive to pumping...
Patent
1976-05-04
1978-05-02
Freeh, William L.
Pumps
Expansible chamber type
Pressure responsive distributor opened responsive to pumping...
417488, 417511, F04B 700, F04B 2104
Patent
active
040872122
ABSTRACT:
A conventional pumping unit is mounted at ground level, to which is attached a hollow sucker rod that extends through a tubing string to the production level of the well. Integral with the tubing string is provided a pump barrel, with communication between the production formation and the tubing string being effected across a ball and seat check valve.
Secured to the lower extremity of the hollow sucker rod is an elongated sleeve-like pump housing having a sealing element at the lower extremity thereof establishing a seal between the pump housing and the pump barrel. Intermediate the extremities of the hollow pump body is formed a plurality of elongated slot-like ports extending parallel with the longitudinal axis of the pump body. An elongated traveling piston is located for reciprocal movement within the pump body and is also provided with a seal at the lower extremity thereof for establishing a sealed relationship with the pump barrel. Ports are formed in the tubular wall structure of the traveling piston to enable pressure induced transfer of well fluid from the pump barrel into the tubing string. The ports of the traveling piston and pump body are capable of registering upon predetermined positioning of the traveling piston relative to the pump body. Such positioning is established upon predetermined movement of the traveling piston relative to the pump body in opposition to the force of a compression spring.
REFERENCES:
patent: 1662942 (1928-03-01), Snoddy et al.
patent: 1771690 (1930-07-01), Rankin
patent: 1950328 (1934-03-01), Scotty et al.
patent: 2131299 (1938-09-01), Reagin
patent: 2253926 (1941-08-01), Anderson et al.
patent: 2344786 (1944-03-01), Patterson et al.
patent: 2690134 (1954-09-01), Ritchey
patent: 2906210 (1959-09-01), Mason
Freeh William L.
Reiter Bernard A.
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