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Electricity generation within a downhole drilling motor

  • US 10,110,091 B2
  • Filed: 09/11/2014
  • Issued: 10/23/2018
  • Est. Priority Date: 09/11/2014
  • Status: Active Grant
First Claim
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1. An apparatus for generating electricity, comprising:

  • a drilling motor, comprisinga stator;

    a rotor operable to rotate within the stator with passage of a drilling fluid through the drilling motor, the rotor comprising a bore that runs through the rotor, the bore comprising an inlet and an outlet, wherein the inlet, the bore, and the outlet define a flow path for the drilling fluid to flow through the rotor; and

    a secondary progressing cavity drive disposed within the rotor, wherein the secondary progressing cavity drive comprises a secondary rotor disposed within a secondary stator;

    a generator disposed at least partially within the bore, wherein the drilling fluid flowing through one or more passages between the secondary stator and the secondary rotor rotates the secondary rotor relative to the secondary stator to drive the generator to generate the electricity.

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