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AssigneesJfe Steel Corporation, Toyo Drilube Co., Ltd.
InventorsTakashi KOGA, Takamasa KAWAI, Seigo GOTO, Sachiko FUJIMOTO, Kotaro FUJISAWA, Koichi SHODA, Kazuhide MATSUMURA, Akira OKUBO, Ryota KOBAYASHI, Ryota KUBO, Kota TOYOSAWA
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A threaded joint for oil country tubular goods has a solid lubrication coating film having good lubricity and rust prevention. Oil country tubular goods constitute a box or a pin used for a threaded joint for oil country tubular goods, the threaded joint formed by connecting the box having a female thread and the pin having a male thread. The oil country tubular goods includes: a resin coating film containing an alkaline soap as a solid lubricant in a binder resin, as an outermost layer of a thread portion. The resin coating film has a surface on which an alkaline soap layer is formed.
Oil country tubular goods constituting a box or a pin used for a threaded joint for oil country tubular goods, the threaded joint formed by connecting the box having a female thread and the pin having a male thread, the oil country tubular goods comprising:
A coating material for forming an outermost layer on a thread portion for oil country tubular goods, the coating material comprising:
Dependencies are inferred from the claim text.