Title:
METAL PIPE FOR OIL WELL
Document Type and Number:
WIPO Patent Application WO/2023/243170
Kind Code:
A1
Abstract:
Provided is a metal pipe for an oil well, the metal pipe comprising a Zn-Ni alloy plating layer having excellent seizure resistance. A metal pipe (1) for an oil well according to the present disclosure comprises a pipe body (10) including a first end part (10A) and a second end part (10B). The pipe body (10) includes a pin (40) formed on the first end part (10A) and a box (50) formed on the second end part (10B). The pin (40) includes a pin contact surface (400) including a male screw part (41). The box (50) includes a box contact surface (500) including a female screw part (51). The metal pipe (1) for an oil well further comprises a Ni plating layer (100) formed on the pin contact surface (400) and/or the box contact surface (500), and a Zn-Ni alloy plating layer (110) formed on the Ni plating layer (100). The deposition amount of the Ni plating layer (100) is larger than or equal to 6.00 g/m 2.
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Inventors:
OSHIMA MASAHIRO (JP)
Application Number:
PCT/JP2023/010725
Publication Date:
December 21, 2023
Filing Date:
March 17, 2023
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
VALLOUREC OIL & GAS FRANCE (FR)
VALLOUREC OIL & GAS FRANCE (FR)
International Classes:
F16L15/04; C25D5/12; C25D5/48; C25D7/00
Domestic Patent References:
| WO2022045209A1 | 2022-03-03 | |||
| WO2022039131A1 | 2022-02-24 | |||
| WO2020166500A1 | 2020-08-20 | |||
| WO2018216475A1 | 2018-11-29 |
Foreign References:
| JP2014202266A | 2014-10-27 | |||
| JPS5817285A | 1983-02-01 |
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (JP)
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