Pumps – Motor driven – Fluid motor
Patent
1978-09-11
1980-07-29
Smith, Leonard E.
Pumps
Motor driven
Fluid motor
417403, F04B 1700, F04B 3500, F01L 1512, F01B 718
Patent
active
042148545
ABSTRACT:
A downhole, hydraulically actuated pump assembly, having an engine reciprocatingly connected to a production pump. Power fluid is conducted downhole to the engine of the pump assembly, while production fluid and spent power fluid is conducted uphole to the surface of the ground.
The pump assembly includes a housing within which spaced, axially aligned, cylindrical chambers reciprocatingly receive spaced engine and pump pistons which are connected together in a manner to enable the engine to reciprocate the production pump.
A mechanically actuated valve assembly is contained within the engine piston and is arranged respective to various different flow passageways so that flow of power fluid through the engine forces the engine piston to reciprocate.
The valve assembly includes a control rod and a valve element concentrically arranged respective to one another and to the engine piston. The valve element is reciprocated respective to the engine piston in response to reciprocation of the control rod. Abutment means formed on the engine cylinder shifts the control rod each stroke of the piston, thereby causing the valve element to shift respective to the piston, whereupon various different flow passageways are aligned with one another to cause power fluid to be effected upon the engine in such a manner that the engine piston reciprocates to thereby force the pump piston to be reciprocated within its cylinder.
REFERENCES:
patent: Re24812 (1960-04-01), Deitrickson
patent: 2682257 (1954-06-01), Deitrickson
patent: 2746431 (1956-05-01), Tebbetts
patent: 2933071 (1960-04-01), Sargent et al.
patent: 2943576 (1960-07-01), English
patent: 2983227 (1961-05-01), English
patent: 3050038 (1962-08-01), Bloudoff
patent: 3502028 (1970-03-01), Cooper
Bates Marcus L.
Smith Leonard E.
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