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

1984-11-20

Smith, Leonard E.

Pumps

Processes

417390, 417397, 60372, F04B 4704

Patent

active

044836627

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: 852061 (1907-04-01), Hoffman
patent: 1607239 (1926-11-01), Clapp
patent: 2141703 (1938-12-01), Bays
patent: 2279057 (1942-04-01), Reed
patent: 2555427 (1951-06-01), Trautman
patent: 2651914 (1953-09-01), Joy
patent: 2934899 (1960-05-01), Koplin et al.
patent: 3782117 (1974-01-01), James
patent: 4099447 (1978-07-01), Ogles

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