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Downhole triaxial electromagnetic ranging

  • US 9,714,563 B2
  • Filed: 12/05/2013
  • Issued: 07/25/2017
  • Est. Priority Date: 12/05/2013
  • Status: Active Grant
First Claim
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1. A method for downhole ranging, comprising:

  • drilling a first wellbore, the first wellbore comprising an elongated conductive body;

    deploying an electric field sensor in a second wellbore;

    inducing a current along the first wellbore that results in an electromagnetic field being emitted from the first wellbore;

    receiving the electromagnetic field utilizing the electric field sensor, wherein an electric field of the electromagnetic field is measured; and

    utilizing the measured electric field to thereby calculate;

    an orientation of the first wellbore; and

    a distance between the first and second wellbores;

    ora direction of the first wellbore in relation to the second wellbore.

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