Behavior of a deep hole drilled in ice at Vostok Station
A coring hole (5G) was drilled at Vostok station down to the depth of 2500m using an electro-thermal drilling system. Relationships between ice core, hole diameters, and drill speed are presented. The hole was only partially filled with fluid (of density of 860kg m^<-3>) so that ice pressure w...
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ftnipr:oai:nipr.repo.nii.ac.jp:00002230 2023-05-15T14:14:56+02:00 Behavior of a deep hole drilled in ice at Vostok Station Tchistiakov,V. K. Kracilev,A. Lipenkov, V. Ya. Balestrieri,J. Ph. Rado,C. Petit,J. R. 1994-03 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2230 http://id.nii.ac.jp/1291/00002230/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2230&item_no=1&attribute_id=18&file_no=1 en eng St. Petersburg Mining Institute/St. Petersburg Mining Institute/Arctic and Antarctic Research Institute/Laboratoire de Glaciologie et Geophysique de l'Environnement/Laboratoire de Glaciologie et Geophysique de l'Environnement/Laboratoire de Glaciologie et Geophysique de l'Environnement https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2230 http://id.nii.ac.jp/1291/00002230/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 49, 247-255(1994-03) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2230&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1994 ftnipr 2022-11-12T19:43:03Z A coring hole (5G) was drilled at Vostok station down to the depth of 2500m using an electro-thermal drilling system. Relationships between ice core, hole diameters, and drill speed are presented. The hole was only partially filled with fluid (of density of 860kg m^<-3>) so that ice pressure was not counter-balanced by the fluid column. After one year, diameter us, depth was measured. The hole deformation was found to be significant for depths below 1500m. The hole closure rate is in agreement with the law proposed by PATERSON (Rev. Geophys. Space Phys., 15,47,1977) and extrapolated to Vostok conditions as well as with previous studies from BLINOV and DMITRIEV (Antarktika, 26,95,1987). This information as well as the data from the fluid density properties is used to predict the hole closure for greater depths. Due to some drawbacks in using a high density fluid for thermal drilling operations a technical strategy for drilling toward 3000m is presented. Report Antarktika ice core Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan Vostok Station ENVELOPE(106.837,106.837,-78.464,-78.464) Paterson ENVELOPE(-154.600,-154.600,-78.033,-78.033) Dmitriev ENVELOPE(153.200,153.200,-68.367,-68.367) |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
A coring hole (5G) was drilled at Vostok station down to the depth of 2500m using an electro-thermal drilling system. Relationships between ice core, hole diameters, and drill speed are presented. The hole was only partially filled with fluid (of density of 860kg m^<-3>) so that ice pressure was not counter-balanced by the fluid column. After one year, diameter us, depth was measured. The hole deformation was found to be significant for depths below 1500m. The hole closure rate is in agreement with the law proposed by PATERSON (Rev. Geophys. Space Phys., 15,47,1977) and extrapolated to Vostok conditions as well as with previous studies from BLINOV and DMITRIEV (Antarktika, 26,95,1987). This information as well as the data from the fluid density properties is used to predict the hole closure for greater depths. Due to some drawbacks in using a high density fluid for thermal drilling operations a technical strategy for drilling toward 3000m is presented. |
format |
Report |
author |
Tchistiakov,V. K. Kracilev,A. Lipenkov, V. Ya. Balestrieri,J. Ph. Rado,C. Petit,J. R. |
spellingShingle |
Tchistiakov,V. K. Kracilev,A. Lipenkov, V. Ya. Balestrieri,J. Ph. Rado,C. Petit,J. R. Behavior of a deep hole drilled in ice at Vostok Station |
author_facet |
Tchistiakov,V. K. Kracilev,A. Lipenkov, V. Ya. Balestrieri,J. Ph. Rado,C. Petit,J. R. |
author_sort |
Tchistiakov,V. K. |
title |
Behavior of a deep hole drilled in ice at Vostok Station |
title_short |
Behavior of a deep hole drilled in ice at Vostok Station |
title_full |
Behavior of a deep hole drilled in ice at Vostok Station |
title_fullStr |
Behavior of a deep hole drilled in ice at Vostok Station |
title_full_unstemmed |
Behavior of a deep hole drilled in ice at Vostok Station |
title_sort |
behavior of a deep hole drilled in ice at vostok station |
publisher |
St. Petersburg Mining Institute/St. Petersburg Mining Institute/Arctic and Antarctic Research Institute/Laboratoire de Glaciologie et Geophysique de l'Environnement/Laboratoire de Glaciologie et Geophysique de l'Environnement/Laboratoire de Glaciologie et Geophysique de l'Environnement |
publishDate |
1994 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2230 http://id.nii.ac.jp/1291/00002230/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2230&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(106.837,106.837,-78.464,-78.464) ENVELOPE(-154.600,-154.600,-78.033,-78.033) ENVELOPE(153.200,153.200,-68.367,-68.367) |
geographic |
Vostok Station Paterson Dmitriev |
geographic_facet |
Vostok Station Paterson Dmitriev |
genre |
Antarktika ice core Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Antarktika ice core Memoirs of National Institute of Polar Research Polar Research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2230 http://id.nii.ac.jp/1291/00002230/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 49, 247-255(1994-03) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2230&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766287288393793536 |