Pumps – Motor driven – Fluid motor
Patent
1980-10-27
1983-09-27
Smith, Leonard E.
Pumps
Motor driven
Fluid motor
91219, 60372, 60416, F04B 4704, F04B 4714
Patent
active
044065973
ABSTRACT:
A pumping method, principally for oil, allows the sucker rod to fall under gravity for the first part of the downward stroke, then decelerates the sucker rod to a slow rate of descent, so creating a pause in the sucker rod's motion. Shock-absorbing means are provided to eliminate the impulsive loadings imposed upon the sucker rod at either extremity of its motion in conventional pumping methods. Hydraulically and mechanically-driven apparatus is disclosed for carrying out the method.
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Nujack Oil Pump Corporation
Smith Leonard E.
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