US 12,071,841 B2
Blender power unit for electric fracturing spread
Bruce Carl Lucas, Duncan, OK (US); Carlos Alfredo Vallejo Gordon, Houston, TX (US); Mark A Hudson, Duncan, OK (US); Glenn Howard Weightman, Duncan, OK (US); Jose L Maldonado, Houston, TX (US); Austin Carl Schaffner, Duncan, OK (US); John Harold Fischer, Houston, TX (US); and Tyler Nolen, Houston, TX (US)
Assigned to Halliburton Energy Services, Inc., Houston, TX (US)
Filed by Halliburton Energy Services, Inc., Houston, TX (US)
Filed on Aug. 29, 2022, as Appl. No. 17/897,700.
Prior Publication US 2024/0068344 A1, Feb. 29, 2024
Int. Cl. H02P 1/04 (2006.01); B01F 33/502 (2022.01); E21B 43/26 (2006.01); H02P 5/00 (2016.01); B01F 33/80 (2022.01); B01F 101/49 (2022.01)
CPC E21B 43/2607 (2020.05) [B01F 33/5026 (2022.01); H02P 1/04 (2013.01); H02P 5/00 (2013.01); B01F 33/805 (2022.01); B01F 2101/49 (2022.01)] 20 Claims
OG exemplary drawing
 
1. A blender power unit (BPU) for use in fracturing well stimulation jobs, co p sing:
a step-down transformer having an input and an output and configured to receive electrical power via the input at a first voltage from a power distribution unit (PDU), from a turbine driven generator, from a diesel driven generator, or from a grid power source and to output electrical power via the output at a second voltage that is lower than the first voltage;
a motor power bus coupled to the output of the step-down transformer;
a motor starter bus;
at least one motor soft starter having an electrical power input coupled to the motor power bus and having an electrical power output coupled to the motor starter bus, wherein each motor soft starter is configured to continuously control voltage output to the motor starter bus to gently accelerate electric motors during motor start-up;
a plurality of electric power relays coupled to the motor power bus and configured to supply electric power from the motor power bus to a load when in a closed state; and
a plurality of start electric power relays coupled to the motor starter bus and configured to supply electric power from the motor starter bus to a load when in a closed state.