Patents Assigned to Geothermal Engineering Co., Ltd.
-
Patent number: 11326433Abstract: 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: GrantFiled: January 31, 2019Date of Patent: May 10, 2022Assignees: 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
-
Publication number: 20210040831Abstract: 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: ApplicationFiled: January 31, 2019Publication date: February 11, 2021Applicants: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY, THE UNIVERSITY OF TOKYO, TOHOKU UNIVERSITY, JMC GEOTHERMAL ENGINEERING CO., LTD.,, TEISEKI DRILLING CO., LTDInventors: Hiroshi ASANUMA, Shigemi NAGANAWA, Noriyoshi TSUCHIYA, Tatsuya KAJIWARA, Kuniaki SHIMADA
-
Patent number: 9234507Abstract: Provided is a steam characteristics automatic measuring device capable of automatically, ideally also continuously measuring the characteristics of steam taken from a production well, without being affected by interfering components, such as hydrogen sulfide gas and carbon dioxide gas contained in large quantities in steam taken from under the ground, which enables the operator to continuously understand the characteristics of steam and support a smooth operation of a geothermal power plant. The device has a silica monitor for measuring a concentration of silica included in a condensate obtained by cooling steam taken from under the ground; an electrical conductivity meter for automatically measuring the electrical conductivity thereof; a pH meter for automatically measuring the pH value thereof; and a data processing transmitter for automatically transmitting data measured by each of the monitor and meters.Type: GrantFiled: October 2, 2009Date of Patent: January 12, 2016Assignees: Fuji Electric Co., Ltd., Geothermal Engineering Co., Ltd., Nikkiso Co., Ltd.Inventors: Ichiro Myougan, Yasuyuki Hishi, Toshiaki Aoki
-
Patent number: 8407027Abstract: An online diagnostic system for a geothermal generation facility is discloses that includes an automatic steam measurement device for measuring a characteristic of steam to be supplied to a steam turbine from a steam-water separator at the geothermal generation facility that outputs analysis data. A monitor-control device controls an operation of the geothermal generation facility while monitoring the geothermal generation facility. A diagnostic device performs at least one of an evaluation of a steam characteristic at the geothermal generation facility, an evaluation of the steam-water separator, and an evaluation of pulsation and confluence of a production well based on the analysis data from the automatic steam measurement device and performance data of the geothermal generation facility from the monitor-control device. An operating status of the geothermal generation facility is diagnosed.Type: GrantFiled: October 19, 2009Date of Patent: March 26, 2013Assignees: Fuji Electric Systems Co., Ltd., Geothermal Engineering Co., Ltd.Inventors: Ichiro Myougan, Toshikazu Kato, Isamu Osawa, Yasuyuki Hishi, Daisuke Fukuda, Yasuto Futagoishi, Toshiaki Aoki
-
Publication number: 20110239649Abstract: Provided is a steam characteristics automatic measuring device capable of automatically, ideally also continuously measuring the characteristics of steam taken from a production well, without being affected by interfering components, such as hydrogen sulfide gas and carbon dioxide gas contained in large quantities in steam taken from under the ground, which enables the operator to continuously understand the characteristics of steam and support a smooth operation of a geothermal power plant. The device has a silica monitor for measuring a concentration of silica included in a condensate obtained by cooling steam taken from under the ground; an electrical conductivity meter for automatically measuring the electrical conductivity thereof; a pH meter for automatically measuring the pH value thereof; and a data processing transmitter for automatically transmitting data measured by each of the monitor and meters.Type: ApplicationFiled: October 2, 2009Publication date: October 6, 2011Applicants: FUJI ELECTRIC SYSTEMS CO., LTD., GEOTHERMAL ENGINEERING CO., LTD., NIKKISO CO., LTD.Inventors: Ichiro Myougan, Yasuyuki Hishi, Toshiaki Aoki
-
Publication number: 20110144947Abstract: An online diagnostic system for a geothermal generation facility is discloses that includes: an automatic steam measurement device for measuring a characteristic of steam to be supplied to a steam turbine from a steam-water separator at the geothermal generation facility that outputs analysis data. A monitor•control device controls an operation of the geothermal generation facility while monitoring the geothermal generation facility. A diagnostic device performs at least one of an evaluation of a steam characteristic at the geothermal generation facility, an evaluation of the steam-water separator, and an evaluation of pulsation and confluence of a production well based on the analysis data from the automatic steam measurement device and performance data of the geothermal generation facility from the monitor•control device. An operating status of the geothermal generation facility is diagnosed.Type: ApplicationFiled: October 19, 2009Publication date: June 16, 2011Applicants: FUJI ELECTRIC SYSTEMS CO., LTD., GEOTHERMAL ENGINEERING CO., LTD.Inventors: Ichiro Myougan, Toshikazu Kato, Isamu Osawa, Yasuyuki Hishi, Daisuke Fukuda, Yasuto Futagoishi, Toshiaki Aoki