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RFT pipeline inspection system and method therefor

  • US 20070006670A1
  • Filed: 07/05/2005
  • Published: 01/11/2007
  • Est. Priority Date: 07/05/2005
  • Status: Active Grant
First Claim
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1. A system for inspecting a pipeline having an inner diameter d, said system comprising a plurality of modular units configured to pass through said pipeline, wherein each of said modular units is flexibly coupled to an adjacent modular unit, and wherein said plurality of modular units comprises:

  • a remote-field testing (RFT) transmission unit comprising an excitation coil configured to excite a magnetic field within said pipeline; and

    an RFT reception unit comprising a plurality of reception coils configured to rotate relative to said pipeline and configured to detect said magnetic field within said pipeline at a reception distance D from said excitation coil, where D≧

    2d.

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