Electro- Mechanical High-Pressure Oilfield Pumping System

Abstract

An electro-mechanical high-pressure oilfield pumping system includes a fracturing (frac) pump, a primary electric motor system, and an auxiliary electric motor system. The primary electric motor system includes a primary electric motor as a prime mover that delivers power to the frac pump. The auxiliary electric motor system includes an electric starting motor that may rotate a shaft of the primary electric motor to achieve or approximate its fixed rated speed before the primary electric motor is energized. The auxiliary electric motor system may further include an electric supplemental motor. The electric supplemental motor may assist the electric starting motor to rotate the shaft of the deenergized primary motor. The electric supplemental motor may also rotate the shaft of the primary electric motor as a passive torque transmission device that delivers power to the frac pump to perform sub-speed operations which may include slow-speed fracturing and/or hydraulic line testing.

Dependencies are inferred from the claim text.