Title:
FRICTION CUT CASING
Document Type and Number:
Japanese Patent JP2018204382
Kind Code:
A
Abstract:
To provide a friction cut casing that can facilitate drawing of a casing by simple means, by solving a problem in which it is difficult to draw the casing in an all-casing construction method.SOLUTION: In a friction cut casing 10, excavation blades 20 are mounted to a bottom edge of a casing 11 with the excavation blades protruded from a cylindrical outer wall surface 111 of the casing 11. Inclined planes 13 are provided between the outer wall surface 111 of the casing 11 and the excavation blades 20 mounted to the bottom edge of the casing 11.SELECTED DRAWING: Figure 1
Inventors:
NISHIHARA HIROMI
OGITA SHIGEYA
OGITA SHIGEYA
Application Number:
JP2017113423A
Publication Date:
December 27, 2018
Filing Date:
June 08, 2017
Export Citation:
Assignee:
RYOKEN KISO CO LTD
International Classes:
E21B7/20; E02D7/22
Domestic Patent References:
| JPS6471921A | 1989-03-16 | |||
| JPH0492073A | 1992-03-25 | |||
| JPH04319195A | 1992-11-10 | |||
| JPS62176286U | 1987-11-09 | |||
| JPH09105289A | 1997-04-22 | |||
| JPH068440U | 1994-02-04 | |||
| JP2008133599A | 2008-06-12 |
Attorney, Agent or Firm:
Masaki Yamada