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High-power well logging method and apparatus

  • US 6,469,636 B1
  • Filed: 11/10/1999
  • Issued: 10/22/2002
  • Est. Priority Date: 12/02/1998
  • Status: Expired due to Term
First Claim
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1. A system for high-power well logging, wherein the system comprises:

  • a multiconductor logging cable which supports a plurality of orthogonal signal transmission modes on circumferentially spaced conductors enclosed within armor and electrically insulated from said armor; and

    surface equipment which includes a high-power power source coupled to the multiconductor cable to drive a power signal in a lowest impedance mode from said plurality of orthogonal signal transmission modes, wherein in the lowest impedance mode the power signal is driven in alternate polarities on adjacent ones of the circumferentially spaced conductors.

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