US 12,391,896 B2
Agent, oil country tubular goods, and threaded joint for oil country tubular goods
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); and Kota Toyosawa, Tokyo (JP)
Assigned to JFE STEEL CORPORATION, Tokyo (JP); and TOYO DRILUBE CO., LTD., Tokyo (JP)
Appl. No. 18/564,198
Filed by JFE STEEL CORPORATION, Tokyo (JP); and TOYO DRILUBE CO., LTD., Tokyo (JP)
PCT Filed May 24, 2022, PCT No. PCT/JP2022/021281
§ 371(c)(1), (2) Date Nov. 27, 2023,
PCT Pub. No. WO2022/255169, PCT Pub. Date Dec. 8, 2022.
Claims priority of application No. 2021-091464 (JP), filed on May 31, 2021.
Prior Publication US 2024/0254405 A1, Aug. 1, 2024
Int. Cl. C10M 133/42 (2006.01); C10M 107/32 (2006.01); C10M 107/40 (2006.01); C10M 111/04 (2006.01); C10M 129/52 (2006.01); C10N 50/08 (2006.01)
CPC C10M 133/42 (2013.01) [C10M 107/32 (2013.01); C10M 107/40 (2013.01); C10M 111/04 (2013.01); C10M 129/52 (2013.01); C10M 2207/142 (2013.01); C10M 2209/1023 (2013.01); C10M 2215/222 (2013.01); C10M 2217/0403 (2013.01); C10N 2050/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An agent for forming a solid lubricating coating film on a thread portion of oil country tubular goods, wherein
a solid lubricant is dispersed in a binder resin,
a main component of the solid lubricant is melamine cyanurate, and an average particle diameter of the melamine cyanurate is 0.1 μm or more and 10.0 μm or less,
the binder resin contains an alkyd resin and nitrocellulose, and the alkyd resin and nitrocellulose are contained in an amount of 85 wt % or more of the total binder resin component weight, and
a total weight of the solid lubricant is 10 parts by weight or more and 100 parts by weight or less based on 100 parts by weight of a total weight of the binder resin.