Title:
破砕工法及びこれに用いられる減圧装置
Document Type and Number:
Japanese Patent JP6969057
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a fracturing method that makes it possible to cause cracks even in the ductile range of bedrock.MEANS TO SOLVE THE PROBLEM: The fracturing method according to the present invention is used to cause a crack in bedrock, and includes an installation step of installing, in a well 8 installed in the bedrock 9, a depressurizing device, which depressurizes the inside of the well 8, and a depressurization step of depressurizing the inside of the well 8, with the depressurizing device 1 installed in the installation step. The installation step includes installing, in the well 8, a connecting pipe 3, which is connected to the depressurizing device 1, and a packer 4, which is attached to the connecting pipe 3, and the depressurization step includes shutting off a gap between the well 8 and the connecting pipe 3, with the packer 4, and depressurizing a region in the well below the packer 4, with the depressurizing device 1.
Inventors:
Hiroshi Asanuma
Naganawa Nami
Noriyoshi Tsuchiya
Tatsuya Kajiwara
Kuniaki Shimada
Naganawa Nami
Noriyoshi Tsuchiya
Tatsuya Kajiwara
Kuniaki Shimada
Application Number:
JP2018018477A
Publication Date:
November 24, 2021
Filing Date:
February 05, 2018
Export Citation:
Assignee:
National Institute of Advanced Industrial Science and Technology
National University Corporation Tokyo University
Tohoku University
Geothermal Engineering Co., Ltd.
INPEX Drilling Co., Ltd.
National University Corporation Tokyo University
Tohoku University
Geothermal Engineering Co., Ltd.
INPEX Drilling Co., Ltd.
International Classes:
E21B43/26
Domestic Patent References:
| JP2010236179A | ||||
| JP2017110367A | ||||
| JP2014234794A |
Attorney, Agent or Firm:
Yasuhiko
Shinjo Castle Shigeki
Shinjo Castle Shigeki