Development of an ice core drill for liquid-filled holes

1 Citations
  • ZUZUKI Y.
    Institute of Low Temperature Science, Hokkaido University
  • 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%.

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Details

  • CRID
    1573387451604708864
  • NII Article ID
    110000010206
  • NII Book ID
    AA00733561
  • ISSN
    03860744
  • Text Lang
    en
  • Data Source
    • CiNii Articles

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