Longstroke pumping apparatus for oil wells

Details Longstroke pumping apparatus for oil wells Longstroke pumping apparatus for oil wells

1976-09-24

1978-02-28

Spar, Robert J.

Implements or apparatus for applying pushing or pulling force

Step-by-step traveling bar

Pawl actuated

74 8922, B66C 2372

Patent

active

040762181

ABSTRACT:
A longstroke pumping apparatus for oil well pumping is provided with turnaround capability and more efficient operation by the use of a two section grooved capstan arrangement from which a flexible pumping cable extends down the well and a flexible counterweight cable extends to a counterweight in a counterweight well. The first section of the capstan from which the pumping cable extends has a basically constant diameter while the second section of the rotatable capstan from which the counterweight cable extends is formed from three contiguous interconnected portions. The central portion has a substantially constant diameter and the two end portions have respectively an effectively increasing diameter and an effectively decreasing diameter. Variations of the above basic arrangement are also described.

REFERENCES:
patent: 2370029 (1945-02-01), Gillespie
patent: 3285081 (1966-11-01), Kuhns et al.

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