Power plants – Pressure fluid source and motor – Cyclically operable reciprocating or oscillating motor or...
Patent
1980-02-07
1983-04-19
Cohen, Irwin C.
Power plants
Pressure fluid source and motor
Cyclically operable reciprocating or oscillating motor or...
60415, 60416, F15B 102, F15B 1302
Patent
active
043801501
ABSTRACT:
One pair of actuating piston and cylinder assemblies are operatively connected to the polish or sucker rod of the pump and are extended or retracted by hydraulic fluid. A further pair of piston and cylinder assemblies are operatively connected to the polish rod and are operatively connected on the underside thereof to an accumulator that includes an inert gas over oil with the gas being supplied under adjustable control conditions from a cylinder or source of high pressure gas so that these further pair of piston and cylinder assemblies counteract the weight of the pump system. On the downstroke, pressure is supplied to the upper sides of all four piston and cylinder assemblies with the two further piston and cylinder assemblies supporting the weight via the accumulator. The gas pressure is adjustable to support the desired proportion of the weight of the pump assembly and the oil being pumped thereby and other accumulators are provided in the circuits to cushion the shock load at either end of the stroke of the pump. Automatically operated switch valves and adjustable flow dividers control the oil flow to the piston and cylinder assemblies at either end of the stroke and the speed of the stroke respectively.
REFERENCES:
patent: 2584127 (1952-02-01), Harcum et al.
patent: 2887846 (1959-05-01), Habenicht
patent: 2982100 (1961-05-01), Sinclair
patent: 2990816 (1961-07-01), Vincent
patent: 2999360 (1961-09-01), Habenicht
patent: 3632234 (1972-01-01), Lake
patent: 3892165 (1975-07-01), Lioux
Ade Stanley G.
Cohen Irwin C.
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