CPC E21B 43/2607 (2020.05) [E21B 43/26 (2013.01); F04B 17/03 (2013.01); F04D 13/12 (2013.01)] | 16 Claims |
1. A compound electro-hydraulic fracturing (frac) pumping system of an electrically driven oilfield pumping system, the compound electro-hydraulic frac pumping system configured to pressurize a frac fluid for delivery into a well that extends into a subterranean geological formation and comprising:
a primary electric motor that defines a prime mover with multiple prime mover outputs that deliver power out of the primary electric motor, the multiple prime mover outputs including at least:
a first prime mover output; and
a second prime mover output;
a transmission system that includes multiple transmissions, the multiple transmissions including at least:
a first transmission that receives power from the first prime mover output of the primary electric motor; and
a second transmission that receives power from the second prime mover output of the primary electric motor;
a frac pump system that receives power from both the first and second transmissions to pressurize the frac fluid for delivery into the well; and
an APU (auxiliary power unit) system that selectively delivers power into at least one of the first and second transmissions and defines multiple modes, including:
a single power delivery mode in which the APU system delivers power into one of the first and second transmissions; and
a compound power delivery mode in which the APU system simultaneously delivers power into both the first and second transmission.
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