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Downhole electrical power generator

  • US 7,242,103 B2
  • Filed: 02/03/2006
  • Issued: 07/10/2007
  • Est. Priority Date: 02/08/2005
  • Status: Active Grant
First Claim
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1. A downhole electrical power generating system, comprising:

  • a flow restricting device which variably restricts fluid flow through an opening, the restricting device vibrating in response to the fluid flow, and the restricting device thereby alternately increasing and decreasing the fluid flow through the opening;

    a flow passage formed longitudinally through a housing, the flow passage being a main internal flow passage for the fluid flow through a tubular string, pressure in a first longitudinal portion of the flow passage being greater than pressure in a second longitudinal portion of the flow passage due to the fluid flow, and the opening providing fluid communication between the first and second flow passage portions; and

    an electricity generating device which generates electricity in response to vibration of the restricting device.

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