US 11,795,799 B2
Compound electro-hydraulic frac pumping system
Edwin E. Wilson, Colleyville, TX (US)
Assigned to Twin Disc, Inc., Racine, WI (US)
Filed by Twin Disc, Inc., Racine, WI (US)
Filed on May 25, 2022, as Appl. No. 17/824,485.
Claims priority of provisional application 63/192,682, filed on May 25, 2021.
Prior Publication US 2022/0381125 A1, Dec. 1, 2022
Int. Cl. E21B 43/26 (2006.01); F04B 17/03 (2006.01); F04D 13/12 (2006.01)
CPC E21B 43/2607 (2020.05) [E21B 43/26 (2013.01); F04B 17/03 (2013.01); F04D 13/12 (2013.01)] 16 Claims
OG exemplary drawing
 
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.