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Steam, hot-water and electrical thermal drills for temperate glaciers
Authors: Gillet F
Year: 1975
Periodical/Journal: Journal of Glaciology
Volume: 14
Number: 70
Page Range: 171-179

The study of temperate glaciers has led to the development of three drilling processes. The steam drill used for ablation stakes is easily portable and its speed is 30-40 m/h for the first 10 m. With the hot-water drill we can drill a fairly large but irregular hole and reach 100 m depth in less than 5 h. The electro-thermal drill, usable to great depths, is particularly suitable for rapid drilling (15m/h and more) of small diameter holes (25 mm) with easily portable equipment.

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