Nippon Steel Corporation

Vallourec Oil and Gas France

Mamoru Ochiai

Tomoka Abe

Keishi Matsumoto

Ken Tomiyasu

Yuichi Iwaki

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)

Oil-well metal pipe

An oil-well metal pipe according to the present disclosure has a pipe main body including a first end portion and a second end portion. The pipe main body includes a pin formed at the first end portion, and a box formed at the second end portion. The pin includes a pin contact surface including an external thread part, and the box includes a box contact surface including an internal thread part. The oil-well metal pipe according to the present disclosure also includes a resin coating containing a resin, a solid lubricant powder, and copper phthalocyanine on or above at least one of the pin contact surface and the box contact surface.

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Tokyo, Japan

Mamoru Ochiai