Pipe pig and method of cleaning a pipe
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United States of America Patent
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-
Apr 21, 2015
Grant Date -
Aug 25, 2011
app pub date -
Jul 31, 2009
filing date -
Jul 31, 2008
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A pipe pig for refinery heater tubes is disclosed. The pipe pig has arcuate cleaning elements which form an expandable circumference. Each of the arcuate cleaning elements has a scraping edge. A spring element biases the arcuate cleaning elements radially outward. The pipe pig may have structural components made from titanium alloys and arcuate cleaning elements made from carbon-carbon composites. A method for cleaning coking out of refinery heater tubes using the pipe pig is also disclosed.
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Family
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Cited Art Landscape
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