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:
Oct. 20, 2026
Filed:
Jul. 14, 2023
Nippon Steel Corporation, Tokyo, JP;
Vallourec Oil and Gas France, Aulnoye-Aymeries, FR;
NIPPON STEEL CORPORATION, Tokyo, JP;
VALLOUREC OIL AND GAS FRANCE, Aulnoye-Aymeries, FR;
Abstract
An oil-well metal pipe according to the present disclosure includes a resin coating formed as an uppermost layer on a pin contact surface and/or on a box contact surface. The resin coating contains: a base resin: 40.0 to 99.4 mass % in total, nylon: 0.1 to 20.0 mass %, TiO: 0.5 to 30.0 mass %, magnesium silicate hydroxide: 0 to 49.4 mass %, a wax: 0 to 10.0 mass %, a fluorine-based additive: 0 to 30.0 mass %, graphite: 0 to 10.0 mass %, a rust preventive pigment: 0 to 30.0 mass %, a coloring pigment: 0 to 10.0 mass %, and a coupling agent: 0 to 10.0 mass %. In the resin coating, a ratio of the total content in mass % of the wax, the fluorine-based additive and the graphite to the total content in mass % of the TiO, the magnesium silicate hydroxide and the nylon is 5.00 or less.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile