AGENT FOR FORMING SOLID LUBRICATING COATING FILM, OIL COUNTRY TUBULAR GOODS, THREADED JOINT FOR OIL COUNTRY TUBULAR GOODS, AND METHOD FOR MANUFACTURING OIL COUNTRY TUBULAR GOODS
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United States of America Patent
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Issued Date -
Aug 1, 2024
app pub date -
May 24, 2022
filing date -
May 31, 2021
priority date (Note) -
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Abstract
A solid lubricating coating film capable of imparting favorable lubricity and corrosion resistance to a connection for oil country tubular goods. Two or more solid lubricants are dispersed in a binder resin. Graphite is contained in an amount of 50% or more and 90% or less of a total weight of the solid lubricants, and the graphite has a scaly shape and an average particle diameter of 10.0 μm or less. A solid lubricant made of one or more materials selected from BN, mica, talc, MCA, MoS2, PTFE, PFA, and FEP is further contained as other solid lubricants of the two or more types of solid lubricants. The binder resin contains a PEEK resin having an average particle diameter of 20 μm or less as a main component, and the PEEK resin is contained in an amount of 70% or more of a total weight of the binder resin.
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