TUBULAR THREADED ELEMENT PROVIDED WITH A DRY PROTECTIVE COATING
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United States of America Patent
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Issued Date -
Sep 3, 2009
app pub date -
Oct 4, 2006
filing date -
Oct 14, 2005
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Abstract
A tubular threaded element including a dry protective coating. The coating includes a solid matrix adhering to the substrate in which are dispersed particles of solid lubricants from at least two classes that are selected to exert a synergistic effect between themselves and with the constituents of the matrix, i.e. coating provides protection against corrosion and against galling of the threadings of threaded elements used in hydrocarbon wells.
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