HALF A MILE THROUGH THE ICE.

Melting a 30-centimetre diameter borehole through 800 metres of ice requires monumental continuous thermal energy. Every litre of water pumped down the drill stem loses heat rapidly to the surrounding sub-zero ice walls. If the thermal flow rate drops or the heating core falters, the borehole quickly freezes closed, trapping valuable sensor packages and drill heads.

Furthermore, the drilling water itself had to meet strict international clean-access protocols. Sourced from melted Antarctic snow, drill water was routed through multi-stage filtration to 0.2 microns, irradiated with ultraviolet sterilisation systems, and brought to high temperatures before being pumped under pressure to the drill nozzle.

To generate the immense thermal transfer required for the WISSARD hot-water drill, the University of Nebraska–Lincoln engineering team selected Alkota industrial pressure-washer systems. Specifically, six Alkota 12257K systems were integrated into the primary Heater Pump Units (four units in HPU-1 and two units in HPU-2).

Published engineering information in the Annals of Glaciology records that each Alkota unit was capable of delivering approximately 45 litres per minute (around 12 GPM) while increasing water temperature by approximately 52°C. When all six Alkota units were available for drill-water production, the combined system could theoretically generate up to approximately 270 litres per minute of clean hot water at approximately 90°C.

In operational field practice, drilling flow was commonly lower because some units were simultaneously tasked with snow melting and reservoir heating. The continuous-wound Schedule 80 coil design and robust slow-turning pump architecture enabled these standard industrial units to operate without failure throughout the campaign.

Before a single litre of hot water could be pumped, the entire drill infrastructure had to be transported across the Antarctic wilderness. The WISSARD equipment traverse travelled approximately 625 miles (1,000 kilometres) from McMurdo Station across the Ross Ice Shelf to the remote drill camp at Lake Whillans.

Contemporary University of Nebraska reporting describes 13 Caterpillar tracked tractors towing 26 ski-mounted modules carrying more than 500,000 pounds of specialised drill gear, generators, laboratory containers, fuel bladders, and the Alkota heating skids over crevassed terrain and wind-scoured sastrugi.

On 28 January 2013 local Antarctic operating time (27 January in the United States), after days of continuous thermal melting, the sensor package on the drill stem registered a sudden pressure drop. The hot-water drill nozzle had broken through approximately 800 metres (half a mile) of West Antarctic ice into Subglacial Lake Whillans.

The borehole was approximately 30 centimetres in diameter. The achievement represented the first successful clean access through the Antarctic ice sheet into a subglacial lake. Scientists subsequently recovered pristine water and sediment samples through the borehole.

The WISSARD scientific programme used the access provided by the drill to collect samples that subsequently produced important evidence of active microbial ecosystems beneath the Antarctic ice sheet.

Subsequent peer-reviewed papers in Nature confirmed that microorganisms thrive in total darkness beneath the ice, deriving metabolic energy from mineral reactions rather than sunlight. While Alkota’s role was strictly the engineering delivery of thermal water, the reliability of that heating core made the clean scientific recovery possible.