- Patent Title: Composition for solid lubricating coating, threaded connection for pipe or tube including the solid lubricating coating formed from the composition, and method of producing the threaded connection
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Application No.: US15126015Application Date: 2015-03-03
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Publication No.: US10336962B2Publication Date: 2019-07-02
- Inventor: Kunio Goto
- Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION , VALLOUREC OIL AND GAS FRANCE
- Applicant Address: JP Tokyo FR Aulnoye-Aymeries
- Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION,VALLOUREC OIL AND GAS FRANCE
- Current Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION,VALLOUREC OIL AND GAS FRANCE
- Current Assignee Address: JP Tokyo FR Aulnoye-Aymeries
- Agency: Clark & Brody
- Priority: JP2014-058702 20140320
- International Application: PCT/JP2015/001112 WO 20150303
- International Announcement: WO2015/141159 WO 20150924
- Main IPC: C10M169/04
- IPC: C10M169/04 ; F16L15/04 ; F16L15/08

Abstract:
This invention provides a threaded connection for pipe or tube that has a non-sticky surface and that suppresses the occurrence of rust and exhibits excellent galling resistance and airtightness even in an extremely low temperature environment without using compound grease, a method of producing the same, and a composition for forming a solid lubricating coating on the threaded connection. A solid lubricating coating (24) formed from a composition containing a binder, a fluorine addition agent, a solid lubricant and a rust proof addition agent is coated as a topmost surface treatment coating on a contact surface of at least one of a pin and a box. Even when exposed to an extremely low temperature environment, the solid lubricating coating (24) can maintain adhesiveness and exhibit a lubricating function, can suppress the occurrence of galling of a threaded connection, and can also secure airtightness after fastening.
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