Oil-well pumping system or the like

Details Oil-well pumping system or the like Oil-well pumping system or the like

1988-02-23

1989-07-18

Garrett, Robert E.

Power plants

Pressure fluid source and motor

Cyclically operable reciprocating or oscillating motor or...

60381, 60414, 60418, 60416, 166 68, 92161, F16H 3946

Patent

active

048480851

ABSTRACT:
The invention involves pressure-counterweighted oil-well pumping apparatus in which derrick structure of elemental simplicity involves components which are readily assembled and disassembled, such that a given pumping apparatus can be loaded on a single truck and transported from one to the next desired well-pumping location. For a given capacity pumping system, overall height requirements for the derrick structure are less than one half those of U.S. Pat. No. 4,631,918. And power-integrator complexity is substantially reduced by employment of a fixed-displacement variety in conjunction with a variable speed a-c motor as the prime mover, under control of solid-state devices and pressure-sensitive transducer elements which determine upper and lower limits of the reciprocating stroke.

REFERENCES:
patent: 3058307 (1962-10-01), Smith
patent: 3782117 (1974-01-01), James
patent: 4114375 (1978-09-01), Saruwatari
patent: 4400141 (1983-08-01), Lee et al.
patent: 4406597 (1983-09-01), Stanton
patent: 4631918 (1986-12-01), Rosman
patent: 4707993 (1987-11-01), Kime

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