Oil well pump drive

Details Oil well pump drive Oil well pump drive

1978-06-12

1980-02-12

Geoghegan, Edgar W.

Power plants

Pressure fluid source and motor

Cyclically operable reciprocating or oscillating motor or...

60371, 60381, 60382, 60383, F16D 3100, F15B 1522

Patent

active

041876806

ABSTRACT:
An oil well pump drive including a drive unit that is hydraulically actuated by a double-acting hydraulic cylinder to reciprocate vertically. An endless chain is entrained over vertically spaced sprockets carried by the unit, with one flight of the chain anchored against vertical movement and the other flight is secured to the pump polish rod so that the vertical motion imparted to the polish rod is double that hydraulically imparted to the drive unit. The polish rod load on the chain is opposed by a counterweight connected thereto by a chain extending over an elevated pulley. The output of the hydraulic pump supplying the hydraulic cylinder is cam controlled so that the motion of the drive unit is smoothly decelerated and accelerated as the unit approaches and moves from the upper and lower limits of its movement.

REFERENCES:
patent: 2550925 (1951-05-01), Weimar
patent: 2560285 (1951-07-01), Habenicht
patent: 2645899 (1953-07-01), Aller et al.
patent: 3482399 (1969-12-01), Lawson

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