Recommendations for a U.S. Ice Coring Program (1986) / Chapter Skim
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APPENDIX A: CRREL Activity in Deep Drilling
APPENDIX A: CRREL Activity in Deep Drilling
Pages 47-51
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From page 47... ...
Drilling at Little America V was the first major ice coring operating to be conducted in a fluid-filled hole. Because of the extensive trip time involved in making and breaking drill pipe joints to recover each core, conventional oil field coring techniques were abandoned in favor of cable-suspended thermal coring methods.
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From page 48... ...
There was also considerable reluctance to continue when price quotations on some major components substantially exceeded original estimates. A decision was made to sponsor the Danish drill development effort, which was already in progress, with CRREL providing advice and assistance.
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From page 49... ...
Electromechanical components, such as motors and gear trains, can be operated in a fluid and pressure compensated with their external environment, but many standard electronic components operate reliably only in air at normal atmospheric pressures and temperatures. Ice cutting disposal Methods for collecting and disposing of ice cuttings depend upon the type of hole fluid selected and the temperature profile in the drill hole.
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From page 50... ...
(4) Involve key field operational personnel during the latter stages of drill development.
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From page 51... ...
Koci Polar Ice Coring Office University of Nebraska-Lincoln Donald E Garfield Cold Regions Research and Engineering Laboratory INTRODUCTION The purpose of this report is to assess existing capabilities in ice core drilling from a national and international perspective, and to provide a realistic assessment of the technological problems and available resources that may be involved in future (5-year)
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