Hydraulic pumping unit

Details Hydraulic pumping unit Hydraulic pumping unit

1996-01-25

1997-07-15

Ryznic, John

Power plants

Pressure fluid source and motor

Cyclically operable reciprocating or oscillating motor or...

60381, 60414, 60431, 60446, F16D 3102

Patent

active

056472080

ABSTRACT:
A Hydraulic Pumping Unit equipped with a flywheel, a high-slip electric motor and a reversible hydraulic pump such that during the downstroke of the Unit, the hydraulic pump operates as a hydraulic motor, accelerating the flywheel and accumulating in this way the energy of the downgoing rodstring in the form of kinetic energy.
The interaction between the flywheel, electric motor and weight of the rodstring adjusts automatically the range of speed variation.
The upward and downward speeds of the Hydraulic Pumping Unit can be adjusted by hand or automatically by electronically commanded step motors, in such a way that the Hydraulic Pumping Units adjusts itself to the varying conditions of the oilwell.

REFERENCES:
patent: 3305195 (1967-02-01), Eickmann
patent: 3675112 (1972-07-01), Smith
patent: 3713291 (1973-01-01), Kubik
patent: 3748857 (1973-07-01), Heiser
patent: 3867846 (1975-02-01), Cambern
patent: 3952513 (1976-04-01), Kubik
patent: 4098144 (1978-07-01), Besel et al.
patent: 4364230 (1982-12-01), Holmes
patent: 4707988 (1987-11-01), Palmers
patent: 4819429 (1989-04-01), Kordak
patent: 4848085 (1989-07-01), Rosman

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