Nippon Steel Corporation

Vallourec Oil and Gas France

Daniel Munoz

Masanari Kimoto

Masahiro Oshima

Alexandre Antoine

An oil-well metal pipe according to the present disclosure includes: a pipe main body that includes a pin which includes a pin contact surface including an external thread part and which is formed at a first end portion, and a box which includes a box contact surface including an internal thread part and which is formed at a second end portion; and a Zn—Ni alloy plating layer which is formed on at least one of the pin contact surface and the box contact surface. The X-ray diffraction intensities of the Zn—Ni alloy plating layer satisfy Formula (1). Here, in Formula (1), in units of cps, an X-ray diffraction intensity of {411} and {330} is substituted for I, an X-ray diffraction intensity of {442} and {600} is substituted for I, and an X-ray diffraction intensity of {552} is substituted for I.

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Meudon, France

Daniel Munoz