The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 2025
Filed:
May. 24, 2022
Jfe Steel Corporation, Tokyo, JP;
Toyo Drilube Co.,ltd., Tokyo, JP;
Yasuhide Ishiguro, Tokyo, JP;
Seigo Goto, Tokyo, JP;
Takashi Koga, Tokyo, JP;
Takamasa Kawai, Tokyo, JP;
Seiji Ozaki, Tokyo, JP;
Hideo Sato, Tokyo, JP;
Sachiko Fujimoto, Tokyo, JP;
Koichi Shoda, Tokyo, JP;
Akira Okubo, Tokyo, JP;
Ryota Kobayashi, Tokyo, JP;
Ryota Kubo, Tokyo, JP;
Kota Toyosawa, Tokyo, JP;
JFE STEEL CORPORATION, Tokyo, JP;
TOYO DRILUBE CO., LTD., Tokyo, JP;
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, MoS, 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.