Automatic load seeking control for a pumpjack motor

Details Automatic load seeking control for a pumpjack motor Automatic load seeking control for a pumpjack motor

1979-04-06

1980-09-02

Freeh, William L.

Pumps

Condition responsive control of pump drive motor

Having timer or delay means

417 45, 417 53, F04B 4900, F04B 4906

Patent

active

042204402

ABSTRACT:
Method and apparatus for matching the power output of a high slip motor to the demand requirement of a pumpjack unit. The stators of the high slip motor are automatically connected in various different configurations to provide the optimum torque as required by the pumpjack unit due to the downhole pumping conditions. A novel control circuitry is connected between the motor starter and the motor stators. The control measures the power drawn by the stators and selects the most optimum configuration thereof for the load required by the pumpjack. This selection operates the motor in the lowest possible torque mode, which is considered the best electrical and mechanical operation of the pumpjack apparatus.

REFERENCES:
patent: 2709775 (1955-05-01), Del Carlo
patent: 3378755 (1968-04-01), Sawyer
patent: 3509824 (1970-05-01), Schmidly, Jr.
patent: 3526816 (1970-09-01), Pacce et al.
patent: 3953777 (1976-04-01), McKee

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