In-pipe coating integrity monitor for very long pipes
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United States of America Patent
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Aug 3, 2010
Grant Date -
Feb 28, 2008
app pub date -
Aug 24, 2007
filing date -
Aug 24, 2006
priority date (Note) -
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Abstract
Systems, methods and program products related to a tether free pigable inspection tool capable of detecting holidays and able to read and store non-conductive internal coating thickness values in very long conductive pipes, along with distance values for further off-line analysis, are provided. The inspection tool includes a plurality of thickness probes, a data storage unit, a control unit, a plurality of navigation wheels and a holiday detector that uses an electrical conductive medium, such as a gas or fluid, as the ground connection. A closed loop configuration is adopted allowing the system to autocorrect itself for different coating thicknesses along the pipe.
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