Beam pumping unit speed control

Details Beam pumping unit speed control Beam pumping unit speed control

G - Physics

05

D

341/38

G05D 7/06 (2006.01) E21B 43/12 (2006.01) F04B 49/06 (2006.01) H02P 27/04 (2006.01)

Patent

CA 1120135

BEAM PUMPING UNIT SPEED CONTROL ABSTRACT OF THE DISCLOSURE This is a method and apparatus for controlling an oil-well beam pumping unit in a manner which allows increased oil production. The AC electric motor of the beam pumping unit is supplied power through a variable frequency power supply, whose frequency (and voltage) is controlled by circuitry to automatically adjust to whatever flow enters the wellbore by varying the speed of the pumping unit to maintain the speed generally proportional to the real power consumed by the pump. As the level in the wellbore can be maintained at an essentially constant minimum level, despite the relatively large hour-to-hour variations in in-flow which normally occur, the total flow from the formation into the wellbore in a given period of time is increased.

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