Document DetailsHot Water Drilling in Antarctic Firn, and Freezing Rates in Water-Filled Boreholes
|Periodical/Journal:||Proceedings of the Second International Workshop/Symposium on Ice Drilling Technology (eds G. Holdsworth, K.C. Kuivinen and J.H. Rand), CRREL Special Report 84-34|
Hot water drilling systems are suitable for applications in which the objective is to gain rapid access to a glacier, ice sheet or ice shelf for seismic shooting, installing temperature sensors, access hole studies or retrieving stuck core drills. The Ross Ice Shelf Project (RISP) hot water drilling at J-9 showed that the decrease in water temperature at the nozzle was 1°C /30 m (1.8°F /100 ft) of depth. The boiler was rated at 2.5 x 106 watts. It produced 320 l/m of water heated from 2°C to 98°C (1.75 x 106 watts). The success of a smaller hot water system (150 kW) used by PICO in 1979-80 at Dome C, Antarctica, in ambient temperatures of -40°C illustrated the speed and reliability possible under extreme environmental conditions.