Title:
METAL PIPE FOR OIL WELL
Document Type and Number:
WIPO Patent Application WO/2023/153274
Kind Code:
A1
Abstract:
Provided is a metal pipe for an oil well, the metal pipe having excellent seizure resistance, even when a plating layer is formed only on or above the contact surface of one among a pin and a box. A metal pipe for an oil well (1) according to the present disclosure comprises: a pin (40) including a pin contact surface (400) having a male thread portion (41); and a box (50) including a box contact surface (500) having a female thread portion (51). The metal pipe for an oil well (1) according to the present disclosure further has: a zirconium oxide coating film (100) formed on one among the pin contact surface (400) and the box contact surface (500); a first resin coating film (310) formed on or above the zirconium oxide coating film (100); a plating layer (200) formed on or above the other among the pin contact surface (400) and the box contact surface (500); and a second resin coating film (320) formed on or above the plating layer (200).
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Inventors:
ABE TOMOKA (JP)
AKIOKA KOJI (JP)
MATSUYAMA TOMOYA (JP)
KURANISHI TAKAO (JP)
AKIOKA KOJI (JP)
MATSUYAMA TOMOYA (JP)
KURANISHI TAKAO (JP)
Application Number:
PCT/JP2023/003051
Publication Date:
August 17, 2023
Filing Date:
January 31, 2023
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
VALLOUREC OIL & GAS FRANCE (FR)
VALLOUREC OIL & GAS FRANCE (FR)
International Classes:
F16L15/04; F16L9/02
Domestic Patent References:
| WO2019074103A1 | 2019-04-18 |
Foreign References:
| JPH01199088A | 1989-08-10 | |||
| CN103527108A | 2014-01-22 | |||
| JP2017071844A | 2017-04-13 | |||
| JP2008527249A | 2008-07-24 | |||
| JP2018508719A | 2018-03-29 | |||
| JP2005299693A | 2005-10-27 | |||
| CN215763760U | 2022-02-08 |
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (JP)
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