Document DetailsA New Electrothermal Drill For Coring In Ice
|Authors:||Gillet F, Donnou D and Ricou G|
|Periodical/Journal:||Ice-Core Drilling (ed. J.F. Splettstoesser), University of Nebraska Press, Lincoln, NE|
The use of a drill tip made of a bare resistance wire fed at low voltage has allowed us to attain drilling speeds of 6 m/hr in temperate ice. The diameters of the hole and the core sample are 140 mm and 102 mm, respectively. In a cold glacier, a vacuum pump eliminates the meltwater. Using an armored electric cable, 500 m long, and a variable speed winch the equipment weighs a total of 1880 kg. The core barrel with the transformer and the unit for removing the melt water weighs 170 kg and is 8.20 m long. The cores obtained are 2.8 m long.