Title:
ロータリー式多重管サンプラー及びこれに用いられるスイベルヘッド
Document Type and Number:
Japanese Patent JP7109857
Kind Code:
B2
Abstract:
To provide a rotary type multi-pipe sampler which securely prevents co-rotation of an inner pipe without increasing the number of components and weight, and can collect core samples without disturbing from the ground including hard steelmaking slugs like calcia modified soil.SOLUTION: A rotary type multi-pipe sampler (1) is configured to: connect, with a swivel joint, an approximately cylindrical outer pipe head (23) which holds an outer pipe (11) having a drilling bit (10) installed at its tip from a rear end side, and an approximately cylindrical inner pipe head (22) which holds an inner pipe (21) arranged inside the outer pipe from the rear end side in the outer pipe; rotate and cut the ground by the tip of the outer pipe that rotates with the outer pipe head; and store uncut core samples in the inside by a transparent pipe (31) arranged inside the inner pipe. The rotary type multi-pipe sampler inhibits co-rotation of the inner pipe with rotation of the outer pipe, by taking off the center of gravity of the inner pipe head from a rotating shaft of the swivel joint.SELECTED DRAWING: Figure 1
Inventors:
Makoto Takaura
Tokuyama Masunari
Tokuyama Masunari
Application Number:
JP2018089947A
Publication Date:
August 01, 2022
Filing Date:
May 08, 2018
Export Citation:
Assignee:
Koa Development Co., Ltd.
International Classes:
E21B25/00
Domestic Patent References:
| JP2012012928A | ||||
| JP2007239358A | ||||
| JP57190899A | ||||
| JP2007039998A | ||||
| JP2003064976A |
Attorney, Agent or Firm:
Seiichi Saito