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:
Dec. 30, 2025
Filed:
Oct. 13, 2022
Nippon Steel Corporation, Tokyo, JP;
Vallourec Oil and Gas France, Aulnoye-Aymeries, FR;
Tomoka Abe, Tokyo, JP;
Keishi Matsumoto, Tokyo, JP;
Mamoru Ochiai, Tokyo, JP;
Yuichi Iwaki, Tokyo, JP;
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 on or above at least one of a pin contact surface and a box contact surface. The resin coating contains: a resin: 50.0 to 99.5 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 %, a coupling agent: 0 to 10.0 mass %, and one type or two types selected from a group consisting of a magnesium silicate hydroxide powder: 1.5 to 50.0 mass % and TiO: 0.5 to 30.0 mass %; and satisfies Formula (1).()/()≤5.00 (1)