Title:
コア採取装置
Document Type and Number:
Japanese Patent JP7252643
Kind Code:
B2
Abstract:
To provide a wire line type core sampling device that can be shared for soft rock and hard rock, and can simplify its structure and reduce its length.SOLUTION: A wire line type core sampling device comprises an outer tube 12, an inner tube 15 that is inserted to the inside of the outer tube 12 and has a core taking-in part 17 at its tip, and a swivel mechanism 13 that rotatably supports the inner tube 15 relative to the outer tube 12. A support shaft 21 of the swivel mechanism 13 has a first shaft body 24, a second shaft body 25, and a spring member 27. The spring member 27 acts as a compression spring when the inner tube 15 retracts relative to the outer tube 12 in a retraction direction, and acts as a tension spring when the inner tube 15 advances relative to the outer tube 12 in a protrusion direction.SELECTED DRAWING: Figure 2
Inventors:
Naoto Yamada
Tetsuomi Miyamoto
Tetsuomi Miyamoto
Application Number:
JP2020115791A
Publication Date:
April 05, 2023
Filing Date:
July 03, 2020
Export Citation:
Assignee:
Christensen Maikai Co., Ltd.
International Classes:
E21B25/00; E02D1/04
Domestic Patent References:
| JP34009451B1 | ||||
| JP11061793A | ||||
| JP2007231630A | ||||
| JP2012117310A |
Foreign References:
| US5992543 | ||||
| US20180066487 |
Attorney, Agent or Firm:
Fumio Takino
Toshiaki Tsuda
Fukuda Yasuhiro
Toshiaki Tsuda
Fukuda Yasuhiro