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Well logging apparatus for obtaining azimuthally sensitive formation resistivity measurements

  • US 20060208738A1
  • Filed: 03/15/2005
  • Published: 09/21/2006
  • Est. Priority Date: 03/15/2005
  • Status: Active Grant
First Claim
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1. A logging while drilling resistivity tool comprising:

  • a substantially cylindrical, electrically conductive tool body including first and second longitudinally opposed ends, the tool body disposed to be operatively coupled with a drill string and deployed in a subterranean borehole such that the logging while drilling tool may acquire resistivity measurements without removing the drill string from the borehole;

    at least one magnetically permeable ring deployed about the tool body between the first and second longitudinally opposed ends thereof, an AC voltage supply electrically connected to the first and second ends of the tool body, at least one connecting conductor deployed exterior to an outer surface of the magnetically permeable ring; and

    a receiver.

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