Electrical control system for oil well bailer pump

Details Electrical control system for oil well bailer pump Electrical control system for oil well bailer pump

1985-03-18

1986-04-22

Freeh, William L.

Pumps

Condition responsive control of pump drive motor

Responsive to accumulation of pumped liquid in receiver

417410, 417411, 166 53, 166 751, 166168, 294 6822, F04B 4900, F04B 1700, E21B 2700

Patent

active

045839166

ABSTRACT:
A direct current operated bailer pump which utilizes battery power to winch up, while recovering the energy generated by the motor acting as a generator during the downward movement of the bailer to recharge the battery. A sensing circuit senses when the bailer contacts the surface of the oil by monitoring the generated voltage from the motor. A voltage drop corresponds to the sudden decrease in velocity as the bailer encounters the surface of the oil in the well. A dynamic brake is connected to the motor, after a set time period, to decrease the down speed of the bailer to a predetermined safe speed.

REFERENCES:
patent: 4037662 (1977-07-01), Bowling
patent: 4062640 (1977-12-01), Gault
patent: 4086035 (1978-04-01), Klaeger et al.
patent: 4368909 (1983-01-01), Alexander
patent: 4476418 (1984-10-01), Werner
patent: 4534706 (1985-08-01), Palm et al.

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