US 12,074,553 B2
System and method for stopping electrically powered fracturing pumps
Rod William Shampine, Houston, TX (US)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on Oct. 14, 2020, as Appl. No. 17/070,065.
Claims priority of provisional application 62/924,721, filed on Oct. 23, 2019.
Prior Publication US 2021/0126561 A1, Apr. 29, 2021
Int. Cl. H02P 3/24 (2006.01); E21B 43/26 (2006.01); F04B 17/03 (2006.01); F04B 49/02 (2006.01); F04B 49/06 (2006.01)
CPC H02P 3/24 (2013.01) [F04B 17/03 (2013.01); F04B 49/02 (2013.01); F04B 49/06 (2013.01); E21B 43/26 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for controlling aspects of a fracturing operation, comprising:
coupling an electric motor with a fracturing pump;
pumping a fracturing fluid into a well by operating the fracturing pump via the electric motor; and
facilitating rapid stoppage of the fracturing pump and the electric motor by applying rotor drag to a rotor of the electric motor, wherein applying rotor drag comprises applying a non-rotating magnetic field to a stator of the electric motor to produce braking eddy currents in the rotor via DC injection braking.