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Antenna cutout in a downhole tubular

  • US 8,174,265 B2
  • Filed: 08/04/2006
  • Issued: 05/08/2012
  • Est. Priority Date: 06/19/2006
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a tubular to operate downhole, the tubular having a longitudinal axis and a circumferential cutout extending around a cutout axis that lies at an angle to the longitudinal axis of the tubular that is other than 90 degrees, the cutout thus extending at a diagonal relative to the longitudinal axis, wherein a width of the cutout is in a range of approximately one to four inches;

    an antenna positioned in the diagonally extending cutout, the antenna to perform at least one of a transmission or reception of an electromagnetic signal that has a path that is to traverse a subsurface formation; and

    a diagonally extending non-magnetic sleeve positioned within the diagonally extending cutout to cover the antenna therein, the sleeve having a plurality of openings, and further having outer sides conforming to wall surfaces of the cutout.

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