Patents Assigned to JMC GEOTHERMAL ENGINEERING CO., LTD.,
  • Fracturing method and depressurizing device used for same
    Patent number: 11326433
    Abstract: A fracturing method, to cause a crack in bedrock, includes installing a depressurizing device in a well in the bedrock, and depressurizing the inside of the well with the installed depressurizing device. The installing step includes installing, in the well, a connecting pipe, which is connected to the depressurizing device, and a packer, which is attached to the connecting pipe, and the depressurizing step includes shutting off a gap between the well and the connecting pipe, with the packer, and depressurizing a region in the well below the packer, with the depressurizing device.
    Type: Grant
    Filed: January 31, 2019
    Date of Patent: May 10, 2022
    Assignees: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, THE UNIVERSITY OF TOKYO, TOHOKU UNIVERSITY, JMC GEOTHERMAL ENGINEERING CO., LTD., INPEX DRILLING CO., LTD.
    Inventors: Hiroshi Asanuma, Shigemi Naganawa, Noriyoshi Tsuchiya, Tatsuya Kajiwara, Kuniaki Shimada
  • FRACTURING METHOD AND DEPRESSURIZING DEVICE USED FOR SAME
    Publication number: 20210040831
    Abstract: A fracturing method, to cause a crack in bedrock, includes installing a depressurizing device in a well in the bedrock, and depressurizing the inside of the well with the installed depressurizing device. The installing step includes installing, in the well, a connecting pipe, which is connected to the depressurizing device, and a packer, which is attached to the connecting pipe, and the depressurizing step includes shutting off a gap between the well and the connecting pipe, with the packer, and depressurizing a region in the well below the packer, with the depressurizing device.
    Type: Application
    Filed: January 31, 2019
    Publication date: February 11, 2021
    Applicants: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, THE UNIVERSITY OF TOKYO, TOHOKU UNIVERSITY, JMC GEOTHERMAL ENGINEERING CO., LTD.,, TEISEKI DRILLING CO., LTD
    Inventors: Hiroshi ASANUMA, Shigemi NAGANAWA, Noriyoshi TSUCHIYA, Tatsuya KAJIWARA, Kuniaki SHIMADA