Accession Number:

AD0762355

Title:

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

Descriptive Note:

Corporate Author:

COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H

Personal Author(s):

Report Date:

1972-09-01

Pagination or Media Count:

27.0

Abstract:

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

Subject Categories:

  • Snow, Ice and Permafrost
  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE