Title:
The screw joint for steel pipes
Document Type and Number:
Japanese Patent JP6220880
Kind Code:
B2
Abstract:
A threaded connection for a steel pipe includes a box which is an opening end of a second pipe and a truncated cone shaped pin which is an end of a first pipe and is inserted into the box, wherein the pin includes a male thread portion which is a tapered thread and a seal portion which includes a tapered surface, the box includes a female thread portion which is a tapered thread and a seal portion which includes a tapered surface, and in a state before make-up between the pin and the box, a minimum diameter of the tapered surface of the pin is smaller than a maximum diameter of the tapered surface of the box.
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| WO/2013/109522 | FITTING FOR JACKETED CONDUITS |
Inventors:
Masaaki Sugino
Tatsuya Yamamoto
Nishikawa Yukihiro
Tatsuya Yamamoto
Nishikawa Yukihiro
Application Number:
JP2015535512A
Publication Date:
October 25, 2017
Filing Date:
September 04, 2014
Export Citation:
Assignee:
Nippon Steel & Sumitomo Metal Corporation
Ballorec Oil and Gas France
Ballorec Oil and Gas France
International Classes:
F16L15/04
Domestic Patent References:
| JP8135855A | ||||
| JP2012241863A | ||||
| JP2007205361A | ||||
| JP2005351324A |
Attorney, Agent or Firm:
Masatake Shiga
Mitsuo Teramoto
Sumio Tanai
Tomoo Katsumata
Hiroshi Yamaguchi
Mitsuo Teramoto
Sumio Tanai
Tomoo Katsumata
Hiroshi Yamaguchi