The UCPH borehole logger

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概要

• 論文の詳細を見る

• The University of Copenhagen (UCPH) logger measures borehole inclination, azimuth, temperature, diameter and pressure. Readings are made continuously by the logger, and the results are transmitted every 3s to the surface. The tool remembers the maxima and minima of the diameters measured in each 3-s period. Thus, all extremes in diameter are recorded. The calliper is designed to give a resolution of 0.1mm. A trade-off of this high resolution is that the tool cannot penetrate in a hole inclined more than 15°, and that the hole wall must be reasonably smooth in order to avoid hanging the tool on its callipers. The logger uses a single conductor coaxial steel cable, 3.1mm in diameter. The winch has a standard 3-phase AC motor, which is powered by a variable frequency drive. The weight of the winch, including 3km of cable, is 400kg, and the total power consumption is less than 2kW. This makes it possible to deploy the logger with light aircraft (Twin Otter or helicopter) support.

• 国立極地研究所の論文

著者

• Clausen Henrik

  University of Copenhagen

• Gundestrup Niels

  University of Copenhagen, Department of Geophysics

• Hansen B.

  Snow and Ice Research Group, University of Nebraska

• Gundestrup Niels

  University Of Copenhagen

• Hansen B.

  Snow And Ice Research Group University Of Nebraska

• Hansen B.

  Snow And Ice Research Group (sirg) University Of Nebraska

関連論文

• A bipolar comparison of deep ice cores from Antarctica（Dome Fuji）and Greenland（GRIP） (scientific paper)
• Sticking deep ice core drills: Why and how to recover
• Attenuation of drill cables
• The UCPH borehole logger
• Hole liquids and gaskets for the ISTUK deep ice core drill
• The new improved version of the ISTUK ice core drill
• The GRIP deep drilling camp
• A new short borehole logging tool

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