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

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

1982-08-11

1985-07-02

Staab, Lawrence J.

Machine element or mechanism

Mechanical movements

Rotary to or from reciprocating or oscillating

74 41, F04B 4702

Patent

active

045260486

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: 632537 (1899-09-01), Rigby
patent: 1495218 (1924-05-01), Allen
patent: 1602907 (1926-10-01), Kingsbury
patent: 1666227 (1928-04-01), Willrich
patent: 1742486 (1930-01-01), Sargent
patent: 3152584 (1964-10-01), Petroff
patent: 3222940 (1965-12-01), Chastian

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