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Apparatus and method for accurate pipeline surveying

  • US 6,768,959 B2
  • Filed: 03/04/2003
  • Issued: 07/27/2004
  • Est. Priority Date: 09/29/1999
  • Status: Expired due to Fees
First Claim
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1. A method for surveying a pipeline, comprising:

  • measuring characteristics of a pipeline so as to produce measured characteristics;

    computing a measured profile of the pipeline;

    correlating the measured profile of the pipeline with a reference profile of the pipeline so as to produce an estimated-pig-location error; and

    correcting at least one position of a pipeline pig using the estimated-pig-location error.

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