Development of a JARE deep ice core drill system
The final design of an electro-mechanical drill is very simple both in shape and in mechanism. It is a straight tube consisting of an antitorque section, motor and computer section, chip chamber and core barrel. Three cutters (rake angle : 30 to 40 degrees, pitch : 5 to 7mm) are attached to cut an i...
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Geosystems Inc./Geo Tecs Co. Ltd./National Institute of Polar Research/Institute of Low Temperature Science, Hokkaido University/Institute of Low Temperature Science, Hokkaido University/Nagaoka University of Technology/National Institute of Polar Research
1994
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ftnipr:oai:nipr.repo.nii.ac.jp:00002215 2023-05-15T16:38:56+02:00 Development of a JARE deep ice core drill system Yoichi Tanaka Akiyoshi Takahashi Yoshiyuki Fujii Hideki Narita Kunio Shinbori Nobuhiko Azuma Okitsugu Watanabe 1994-03 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2215 http://id.nii.ac.jp/1291/00002215/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2215&item_no=1&attribute_id=18&file_no=1 en eng Geosystems Inc./Geo Tecs Co. Ltd./National Institute of Polar Research/Institute of Low Temperature Science, Hokkaido University/Institute of Low Temperature Science, Hokkaido University/Nagaoka University of Technology/National Institute of Polar Research https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2215 http://id.nii.ac.jp/1291/00002215/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 49, 113-123(1994-03) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2215&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1994 ftnipr 2022-11-12T19:43:03Z The final design of an electro-mechanical drill is very simple both in shape and in mechanism. It is a straight tube consisting of an antitorque section, motor and computer section, chip chamber and core barrel. Three cutters (rake angle : 30 to 40 degrees, pitch : 5 to 7mm) are attached to cut an ice core 94mm in diameter and bore hole 135mm in diameter. The maximum core length is 2.1m long. Chips are transported between the core barrel and the outer tube by spiral rim attached to the core barrel. No motor for sucking chips up to the chip chamber is installed. The chips are separated from liquid by the filter at top of the chip chamber, and are compacted to the density of 500kg/m^3. In the pressure tight electronics section, a computer, DC brushless motor (270V, 600W, 12000rpm) and reduction gear (1/170) are installed. The antitorque section has three leaf springs. A steel cable 7.7mm in diameter has been chosen. The actual drilling operation is easy, for in response to the cutter load, a switching signal (go or stop) can be sent from the relay computer to the winch controller. What an operator has to do is, before drilling, to set the winch speed at the proper value and set the threshold value of the cutter load, and, while drilling, check the motor current if it increases rapidly. Report ice core Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan |
institution |
Open Polar |
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National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
The final design of an electro-mechanical drill is very simple both in shape and in mechanism. It is a straight tube consisting of an antitorque section, motor and computer section, chip chamber and core barrel. Three cutters (rake angle : 30 to 40 degrees, pitch : 5 to 7mm) are attached to cut an ice core 94mm in diameter and bore hole 135mm in diameter. The maximum core length is 2.1m long. Chips are transported between the core barrel and the outer tube by spiral rim attached to the core barrel. No motor for sucking chips up to the chip chamber is installed. The chips are separated from liquid by the filter at top of the chip chamber, and are compacted to the density of 500kg/m^3. In the pressure tight electronics section, a computer, DC brushless motor (270V, 600W, 12000rpm) and reduction gear (1/170) are installed. The antitorque section has three leaf springs. A steel cable 7.7mm in diameter has been chosen. The actual drilling operation is easy, for in response to the cutter load, a switching signal (go or stop) can be sent from the relay computer to the winch controller. What an operator has to do is, before drilling, to set the winch speed at the proper value and set the threshold value of the cutter load, and, while drilling, check the motor current if it increases rapidly. |
format |
Report |
author |
Yoichi Tanaka Akiyoshi Takahashi Yoshiyuki Fujii Hideki Narita Kunio Shinbori Nobuhiko Azuma Okitsugu Watanabe |
spellingShingle |
Yoichi Tanaka Akiyoshi Takahashi Yoshiyuki Fujii Hideki Narita Kunio Shinbori Nobuhiko Azuma Okitsugu Watanabe Development of a JARE deep ice core drill system |
author_facet |
Yoichi Tanaka Akiyoshi Takahashi Yoshiyuki Fujii Hideki Narita Kunio Shinbori Nobuhiko Azuma Okitsugu Watanabe |
author_sort |
Yoichi Tanaka |
title |
Development of a JARE deep ice core drill system |
title_short |
Development of a JARE deep ice core drill system |
title_full |
Development of a JARE deep ice core drill system |
title_fullStr |
Development of a JARE deep ice core drill system |
title_full_unstemmed |
Development of a JARE deep ice core drill system |
title_sort |
development of a jare deep ice core drill system |
publisher |
Geosystems Inc./Geo Tecs Co. Ltd./National Institute of Polar Research/Institute of Low Temperature Science, Hokkaido University/Institute of Low Temperature Science, Hokkaido University/Nagaoka University of Technology/National Institute of Polar Research |
publishDate |
1994 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2215 http://id.nii.ac.jp/1291/00002215/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2215&item_no=1&attribute_id=18&file_no=1 |
genre |
ice core Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
ice core Memoirs of National Institute of Polar Research Polar Research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2215 http://id.nii.ac.jp/1291/00002215/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 49, 113-123(1994-03) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2215&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766029299108806656 |