Safety indicator lights for hydraulic fracturing pumps

  • US 9,650,871 B2
  • Filed: 07/22/2016
  • Issued: 05/16/2017
  • Est. Priority Date: 11/16/2012
  • Status: Active Grant
First Claim
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1. A hydraulic fracturing system for fracturing a subterranean formation comprising:

  • a plurality of electric pumps fluidly connected to the formation, and powered by at least one electric motor, and configured to pump fluid at high pressure into a wellbore that intersects the formation, so that the fluid passes from the wellbore into the formation, and fractures the formation;

    a variable frequency drive connected to the electric motor to control the speed of the motor, wherein the variable frequency drive frequently performs electric motor diagnostics to prevent damage to the at least one electric motor; and

    a signal assembly that selectively emits a visual signal that is indicative of an operational state of the hydraulic fracturing system.

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