Development of an ice core drill for liquid-filled holes
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- ZUZUKI Y.
- Institute of Low Temperature Science, Hokkaido University
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- Shimbori Kunio
- Institute of Low Temperature Science, Hokkaido University
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Abstract
Simple tests simulating drilling in a liquid-filled hole were done of an S-type Archimedean core drill, consisting of a drive-unit, a jacket, a shaft with a screw booster and a sweeper, and a barrel. The barrel length was 0.9m. The tests revealed that the clearance between the jacket and the barrel (which together made up an Archimedean pump) should be a little wider for drilling in a liquidfilled hole than in a dry hole. With the clearance of 7.4mm, the pump could transport ice chips to the storage space between the booster and the sweeper, where the booster compacted chips by squeezing a large portion of the liquid through the sweeper which was permeable to liquid. The porosity of compacted chips could be as low as 35%.
Journal
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- Mem. Nati. Inst. Polar Res.
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Mem. Nati. Inst. Polar Res. 45 86-92, 1986
National Institute of Polar Research
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Details
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- CRID
- 1573387451604708864
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- NII Article ID
- 110000010206
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- NII Book ID
- AA00733561
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- ISSN
- 03860744
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- Text Lang
- en
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- Data Source
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- CiNii Articles