Method for pumping a liquid from a well and apparatus for use th

Details Method for pumping a liquid from a well and apparatus for use th Method for pumping a liquid from a well and apparatus for use th

1982-08-11

1985-10-08

Smith, Leonard E.

Pumps

Processes

417399, 60414, F04B 4704

Patent

active

045457379

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.

REFERENCES:
patent: 2141703 (1938-12-01), Bays
patent: 2279057 (1942-04-01), Reed
patent: 2555427 (1951-06-01), Trautman
patent: 2934899 (1960-05-01), Koplin et al.
patent: 4099447 (1978-07-01), Ogles
patent: 4406597 (1983-09-01), Stanton

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