|Title||The USA CRREL drill for thermal coring in ice|
|Author(s)||Herbert T Ueda , Donald E Garfield|
Journal of Glaciology
The USA CRREL drill is an 80-kg, electrothermal unit designed for continuous coring in temperate or polar ice or snow. The drill melts a hole approximately 16.3 cm in diameter and retrieves a core approximately 12.2 cm in diameter at rates from 1.9 m h−1 in −28°C ice to 2.3 m h−1 in temperate ice. The melt water formed is removed by a vacuum system and stored in a tank. Additional equipment includes 450 m of armored electrical cable, a hoist, a 6.7-m tower and a gasoline generator. The minimum time required to drill a 450-m hole is 435 h. All of the equipment has been designed to be assembled and operated by two men and has a gross shipping weight of 1180 kg.
|Equipment||Electrothermal (ET/ETED/ATED) Drills|
|Citation||Herbert T Ueda , Donald E Garfield ( 1969 ) The USA CRREL drill for thermal coring in ice. Journal of Glaciology , 8 , 53 , 311-314 . doi: 10.3189/S0022143000031282|