Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
April 23, 2013
Patent Application Number
12719350
Date Filed
March 8, 2010
Patent Citations Received
Patent Primary Examiner
Patent abstract
A method for tracking a scraper within a pipeline has the steps of moving the scraper along a path in the pipeline such that the scraper produces an acoustic signal, sensing the acoustic signal as produced by the scraper by at least a pair of acoustic sensors positioned in spaced relation along the pipeline, time-stamping the sensed acoustic signal, and calculating a location of the scraper based on the time-stamped acoustic signal. The acoustic signal can be a transient pressure wave produced by the movement of the scraper or a pressure signal produced by a mechanism positioned on the scraper.
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