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Co-located antennas

  • US 7,286,091 B2
  • Filed: 10/21/2005
  • Issued: 10/23/2007
  • Est. Priority Date: 06/13/2003
  • Status: Expired due to Fees
First Claim
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1. A method for constructing co-located antennas on an electromagnetic logging tool for exploring an earthen formation via a borehole, comprising:

  • winding a first antenna on an elongated mandrel of a tool body of the electromagnetic logging tool, the first antenna having a first magnetic dipole in a first orientation; and

    winding a second antenna on the elongated mandrel through a first set of openings through the tool body, whereby the antenna extends inward and outward of the tool body, the second antenna having a second magnetic dipole in a second orientation, wherein the first orientation is different from the second orientation, and wherein a center of the first magnetic dipole substantially co-locates with a center of the second magnetic dipole.

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