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Title: Rotary drilling and coring in permafrost. part 1, preliminary investigation, Fort Churchill, Manitoba
Authors: Lange, G. Robert.
Keywords: Permafrost
Frozen ground
Rotary drilling
Publisher: Cold Regions Research and Engineering Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 95 pt.1.
Description: Technical Report
Abstract: A small rotary drill rig was instrumented and used at Fort Churchill, Manitoba, to investigate the problems of drilling and coring in permafrost. Small diameter augers were also tested. Adequate rates of penetration were easily achieved. However, difficulties were encountered when hole walls and core were thawed by warm drilling fluid. Some success was achieved when coring with water cooled by ice. It was concluded that the feasibility of using a low freezing point liquid and/or compressed air and a portable refrigerator should be investigated.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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