Title:
ダブルショルダ型ツールジョイントを有する掘削用鋼管
Document Type and Number:
Japanese Patent JP6528292
Kind Code:
B2
Inventors:
Hiroshi Sakura
Fukui Toshihiko
Tomoyuki Narukawa
Asahi Inoue
Takeshi Miyazaki
Masanori Xu
Fukui Toshihiko
Tomoyuki Narukawa
Asahi Inoue
Takeshi Miyazaki
Masanori Xu
Application Number:
JP2017546930A
Publication Date:
June 12, 2019
Filing Date:
March 18, 2015
Export Citation:
Assignee:
NKK Seamless Steel Pipe Co., Ltd.
Japan Agency for Marine-Earth Science and Technology
Japan Agency for Marine-Earth Science and Technology
International Classes:
F16L15/04; F16L15/00
Domestic Patent References:
| JP2012241863A | ||||
| JP798082A |
Foreign References:
| WO2005059422A1 | ||||
| US5358285 | ||||
| WO2013084099A1 | ||||
| CN203476240U |
Attorney, Agent or Firm:
Hirata International Patent Office