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Filter-switched drive operating mode control

  • US 6,700,762 B2
  • Filed: 08/31/2001
  • Issued: 03/02/2004
  • Est. Priority Date: 08/31/2000
  • Status: Expired due to Term
First Claim
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1. For use in a downhole production system, an electrical power system for providing three phase power without damage to the power system or downhole equipment comprising:

  • a power source capable of selectively producing pulse width modulated three phase power for transmission over a cable into a borehole;

    a filter capable of filtering the power produced by the power source prior to transmission over the cable; and

    a controller capable of monitoring the filtered power and, responsive to detecting improper filtering of the power by the filter, either disabling transmission of power into the borehole by the power source or changing an operating mode of the power source.

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