Hydraulic oil well pumping apparatus

Details Hydraulic oil well pumping apparatus Hydraulic oil well pumping apparatus

1980-11-04

1983-09-27

Nilson, Robert G.

Power plants

Pressure fluid source and motor

Control by independently operated punch card, tape, digital...

60369, 60372, 60381, 60382, 60476, 92134, 417390, 417399, F15B 2102

Patent

active

044061226

ABSTRACT:
The preferred embodiment is directed to an oil well pumping apparatus incorporating a walking beam having a horsehead at one end which connects to the sucker rods in the oil well. The opposite end of the walking beam is supported on a fixed pivot. A hydraulic and pneumatic combination unit connects from a supporting platform to a central point on the beam to raise and lower the beam. The improved apparatus utilizes air pressure to balance the static load on the apparatus and dynamically strokes the sucker rod string by imparting a reciprocating motion through hydraulic power applied at a specified rate to raise and lower the walking beam. A pump and motor system for a closed hydraulic loop is included. Alternate preferred embodiments are disclosed. In one form, a lubricating system is incorporated. First and second alternate forms of pickoff apparatus which powers the pneumatically balanced pumping apparatus is also included.

REFERENCES:
patent: 2780063 (1957-02-01), Bacchi
patent: 3123007 (1964-03-01), Orr
patent: 3343409 (1967-09-01), Gibbs
patent: 3971213 (1976-07-01), Kelley
patent: 4114375 (1978-09-01), Saruwatari

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