Ice core drills usable for wet ice
Ice core drills which stored cuttings above the core barrel were tested. Cuttings were pushed up by one short booster screw. For a constant drilling speed, the necessary power increased with the amount of cuttings, being less than 110% of initial value (power for cutting only) for a 1.2-m drilling a...
| Main Authors: | , |
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| Format: | Report |
| Language: | English |
| Published: |
Institute of Low Temperature Science, Hokkaido University/Institute of Low Temperature Science, Hokkaido University
1985
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| Subjects: | |
| Online Access: | https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1848 http://id.nii.ac.jp/1291/00001848/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1848&item_no=1&attribute_id=18&file_no=1 |
| Summary: | Ice core drills which stored cuttings above the core barrel were tested. Cuttings were pushed up by one short booster screw. For a constant drilling speed, the necessary power increased with the amount of cuttings, being less than 110% of initial value (power for cutting only) for a 1.2-m drilling and about 150% for a 2.6-m drilling. The drills could core wet ice as efficiently as cold ice. The method of storing cuttings is also adequate for a drill used in a liquid-filled hole. |
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