METHODS AND SYSTEM FOR CONTROLLING A LINEAR MOTOR FOR A DEEP WELL OIL PUMP
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United States of America Patent
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Nov 26, 2013
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Nov 26, 2012
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Abstract
A deep well linear motor pump system (122) comprising a downhole linear electric motor (222) having a stator and a shaft configured to move linearly relative to the stator, a downhole pump (220) having an inlet (227), an outlet (228), and a piston coupled to the linear motor shaft, a motor driver system (318) connected with the linear motor and configured to provide drive commands to the linear motor, a surface control computer (126) connected with the motor drive system and configured to control the linear motor, a sensor system (224) communicating with the control computer and configured to sense operating parameters of the linear motor, and the sensor system comprising a synchronous serial interface encoder configured to sense position of the motor shaft and a temperature sensor configured to sense the temperature of the motor.
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