Title:
SCREW JOINT-EQUIPPED OIL WELL PIPE, METHOD FOR PRODUCING OIL WELL PIPE CONNECTING BODY WHICH USES SCREW JOINT-EQUIPPED OIL WELL PIPE, AND METHOD FOR PRODUCING SCREW JOINT-EQUIPPED OIL WELL PIPE
Document Type and Number:
WIPO Patent Application WO/2022/230973
Kind Code:
A1
Abstract:
Provided is a screw joint-equipped oil well pipe which is capable of suppressing shouldering torque, minimizing rusting on the pin contact surface, and attaining excellent seizure resistance without using compound grease. A screw joint-equipped oil well pipe according to the present disclosure is equipped with a pipe main body (10) which includes a first end section (10A) and a second end section (10B). The pipe main body (10) includes a pin (40) formed at the first end section (10A) and a box (50) formed at the second end section (10B). The pin contact surface (400) of the pin (40) is coated with light oil (80). The box contact surface (500) of the box (50) has a solid lubrication film (60) formed thereon.
Inventors:
NAKAI YUYA (JP)
KURANISHI TAKAO (JP)
NAKAMURA KEIICHI (JP)
BENIYA YUKI (JP)
MITSUNARI HIDEKI (JP)
KURANISHI TAKAO (JP)
NAKAMURA KEIICHI (JP)
BENIYA YUKI (JP)
MITSUNARI HIDEKI (JP)
Application Number:
PCT/JP2022/019271
Publication Date:
November 03, 2022
Filing Date:
April 28, 2022
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
VALLOUREC OIL & GAS FRANCE (FR)
VALLOUREC OIL & GAS FRANCE (FR)
International Classes:
F16L15/04
Domestic Patent References:
| WO2019074097A1 | 2019-04-18 | |||
| WO2022045209A1 | 2022-03-03 | |||
| WO2009072486A1 | 2009-06-11 |
Foreign References:
| JP2007071231A | 2007-03-22 | |||
| JP2001065754A | 2001-03-16 | |||
| JP2005315307A | 2005-11-10 |
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (JP)
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