Title:
METAL PIPE FOR OIL WELLS
Document Type and Number:
WIPO Patent Application WO/2023/063385
Kind Code:
A1
Abstract:
The present invention provides a metal pipe for oil wells, the metal pipe having a high shear strength. A metal pipe for oil wells according to the present disclosure is provided with a resin film (100) on or above at least one of a pin contact surface (400) and a box contact surface (500). The resin film (100) contains 50.0% to 99.5% by mass of a resin, 0% to 10.0% by mass of a wax, 0% to 30.0% by mass of a fluorine-based additive, 0% to 10.0% by mass of graphite, 0% to 30.0% by mass of a rust preventive pigment, 0% to 10.0% by mass of a coloring pigment and 0% to 10.0% by mass of a coupling agent, while additionally containing 1.5% to 50.0% by mass of a hydrated magnesium silicate powder and/or 0.5% to 30.0% by mass of TiO2, and satisfying formula (1). (1): (W + F + G)/(M + T) ≤ 5.00
Inventors:
ABE TOMOKA (JP)
MATSUMOTO KEISHI (JP)
OCHIAI MAMORU (JP)
IWAKI YUICHI (JP)
MATSUMOTO KEISHI (JP)
OCHIAI MAMORU (JP)
IWAKI YUICHI (JP)
Application Number:
PCT/JP2022/038194
Publication Date:
April 20, 2023
Filing Date:
October 13, 2022
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
DAIZO CORP (JP)
VALLOUREC OIL & GAS FRANCE (FR)
DAIZO CORP (JP)
VALLOUREC OIL & GAS FRANCE (FR)
International Classes:
F16L15/04; C23C26/00
Domestic Patent References:
| WO2015141159A1 | 2015-09-24 | |||
| WO2018216416A1 | 2018-11-29 |
Foreign References:
| JP2010511135A | 2010-04-08 | |||
| CN103270146A | 2013-08-28 |
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (JP)
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