초록 ▼

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

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.

대표청구항 ▼

A well having a downhole pump connected to be stroked by a pumpjack unit; said pumpjack unit having a three phase oilwell pumping motor, the stator of which is connectable in either of Y, DDDDDDDDD

A well having a downhole pump connected to be stroked by a pumpjack unit; said pumpjack unit having a three phase oilwell pumping motor, the stator of which is connectable in either of Y, DDDDDDDDD