Title:
THREADED JOINT
Document Type and Number:
WIPO Patent Application WO/2020/183860
Kind Code:
A1
Abstract:
Provided is a threaded joint with excellent compression resistance and sealing properties. The threaded joint (1) is configured such that: by way of a threaded connection of a tapered screw (4), a male thread portion (4a) contacts a female thread portion (4b) at both an insertion face (9) and a load face (10) in a state in which a gap with the female thread portion (4b) remains at both the thread top face (7) and the thread bottom face (8); the insertion face flank angle (α) of the tapered screw (4) is 30-50 degrees and the load face flank angle (β) of the tapered screw (4) is -10 to less than 0 degrees; the screw taper that is the variation in diameter per unit length in the shaft direction on the tapered screw (4) is between 1/10 and 1/4; and the seal taper angle (γ) of a box seal section (11b) is 3-10 degrees.
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Inventors:
KAWAI TAKAMASA (JP)
YOSHIKAWA MASAKI (JP)
TAKANO JUN (JP)
YONEYAMA TSUYOSHI (JP)
GOTO SEIGO (JP)
YOSHIKAWA MASAKI (JP)
TAKANO JUN (JP)
YONEYAMA TSUYOSHI (JP)
GOTO SEIGO (JP)
Application Number:
PCT/JP2019/050408
Publication Date:
September 17, 2020
Filing Date:
December 23, 2019
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
E21B17/042; F16L15/04; F16L15/06
Domestic Patent References:
| WO2018052140A1 | 2018-03-22 |
Foreign References:
| JPH09119564A | 1997-05-06 | |||
| JP2008516155A | 2008-05-15 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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