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US Patent 9945365 Fixed frequency high-pressure high reliability pump drive

Patent 9945365 was granted and assigned to BJ Services Company on April, 2018 by the United States Patent and Trademark Office.

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Patent abstract

An apparatus configured to hydraulically fracture an earth formation, includes a pump configured to hydraulically fracture the earth formation by pumping a fracturing liquid into a borehole penetrating the earth formation and an electric motor having a rotor coupled to the pump and a stator. A motor control center is configured to apply an alternating electrical voltage having a fixed-frequency to the stator in order to power the electric motor, wherein the apparatus and motor control center do not have a variable frequency drive.

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