Title:
THREADED PIPE JOINT
Document Type and Number:
WIPO Patent Application WO/2016/157887
Kind Code:
A1
Abstract:
Provided is a threaded pipe joint that, when acted upon by a tensile load, does not break on the female thread-side of a first thread section of a second thread series that extends from an intermediate shoulder and reliably undergoes tensile rupture on the female thread-side of a first thread section of a first thread series, which is the original critical cross-section site. The threaded pipe joint is configured so that when the male and female threads of the intermediate shoulder are screwed together, the load flank-side thread gaps L1G and L2G of a first thread series, which is the radially inward thread series, and a second thread series, which is the radially outward thread series, on the two sides of the intermediate shoulder always satisfy the relationship L1G < L2G.
Inventors:
YOSHIKAWA MASAKI (JP)
TAKAHASHI KAZUNARI (JP)
KANAYAMA TARO (JP)
TAKANO JUN (JP)
KAWAI TAKAMASA (JP)
YONEYAMA TSUYOSHI (JP)
TAKAHASHI KAZUNARI (JP)
KANAYAMA TARO (JP)
TAKANO JUN (JP)
KAWAI TAKAMASA (JP)
YONEYAMA TSUYOSHI (JP)
Application Number:
PCT/JP2016/001801
Publication Date:
October 06, 2016
Filing Date:
March 28, 2016
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
F16L15/04; E21B17/08
Foreign References:
| JP2013519854A | 2013-05-30 | |||
| JPH1113728A | 1999-01-22 | |||
| JPH07504483A | 1995-05-18 |
Other References:
See also references of EP 3279538A4
Attorney, Agent or Firm:
KUMASAKA, Akira et al. (JP)
Akira Kumasaka (JP)
Akira Kumasaka (JP)
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