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Rotating magnet-induced current pipeline inspection tool and method

  • US 20060164091A1
  • Filed: 05/13/2005
  • Published: 07/27/2006
  • Est. Priority Date: 01/26/2005
  • Status: Abandoned Application
First Claim
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1. A device to aid in detecting an anomaly in an electrically-conductive wall of a pipeline, the device comprising:

  • a magnetically-permeable bar, the bar adapted to be positioned diametrically within the pipeline and comprising;

    a first end, the first end comprising;

    a first permanent magnet, the first permanent magnet comprising;

    a first magnetic polarity; and

    a magnetic strength of greater than or equal to 25 megaGauss-Oersted;

    a second end, the second end comprising;

    a second permanent magnet, the second permanent magnet comprising;

    a second magnetic polarity; and

    a magnetic strength of greater than or equal to 25 megaGauss-Oersted; and

    an axis of rotation, the axis of rotation being equidistant from the first end and the second end and adapted to be coaxial with the long axis of the pipeline; and

    means for rotating the bar about the axis of rotation, whereby currents are induced within the wall.

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