Rotary Drilling and Coring in Permafrost. Part III. Deep Core Drilling, Core Analysis and Bore Hole Thermometry at Cape Thompson, Alaska

Two holes were successfully drilled and cored to depths of 1000 ft and 1200 ft in the frozen mudstone of the Tiglukpuk formation at Cape Thompson, Alaska. Permafrost extends to a depth of approximately 1000 ft. The hole walls were successfully stabilized, even in zones of very weak rock, by the use...

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Bibliographic Details
Main Authors: Lange,G. Robert, Smith,T. K.
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
Format: Text
Language:English
Published: 1972
Subjects:
Snow
Ice and Permafrost
Civil Engineering
(*PERMAFROST
DRILLING)
DRILLS
DRILLING MACHINES
ICE
ROCK
CUTTING FLUIDS
SAMPLING
THERMISTORS
ALASKA
BOREHOLES
ROTARY DRILLING
DRILL CORES
Ice
permafrost
Alaska
Online Access:http://www.dtic.mil/docs/citations/AD0762355
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0762355
Description
Summary:Two holes were successfully drilled and cored to depths of 1000 ft and 1200 ft in the frozen mudstone of the Tiglukpuk formation at Cape Thompson, Alaska. Permafrost extends to a depth of approximately 1000 ft. The hole walls were successfully stabilized, even in zones of very weak rock, by the use of refrigerated diesel fuel as a drilling fluid, and frozen cores of good quality were taken with little difficulty. A thermistor cable was inserted in one of the holes and ground temperatures were measured to 1000 ft with a high order of accuracy and stability. Data required to predict accurate equilibrium temperatures were available one month following installation. (Modified author abstract) See also Part 1, AD-681 218.

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