|Title||Modeling hole size, lifetime and fuel consumption in hot-water ice drilling|
|Author(s)||Lee Greenler , Terry Benson, Jeff Cherwinka, Alan Elcheikh, Farshid Feyzi, Albrecht Karle, Robert Paulos|
Annals of Glaciology
IceCube, a cubic-kilometer neutrino detector, was built at the South Pole using a hot-water drill system. Deep holes were drilled into the Antarctic ice sheet and filled with highly sensitive optical instrumentation. For the hot-water drilling, a computer model was developed to predict the hole sizes and hole lifetimes during construction. The goal was to predict ultimate size and freezeback rates based on water flow rate and temperature, drill speed, ice temperature and ream parameters (for a secondary operation where hot water continues to flow as the drill is withdrawn). This model proved to be very successful. It increased confidence that the holes would remain open long enough after drilling to allow the deployment of the necessary instrumentation. It also allowed for a decrease, over the course of the project, in the amount of overdrilling that was used as a margin against a too-rapid freeze-in. This resulted in significant fuel savings.
|Special Collections||International Workshop on Ice Drilling Technology Series, 7th International Workshop on Ice Drilling Technology|
|Categories||Hot Water Drilling|
|Citation||Lee Greenler , Terry Benson, Jeff Cherwinka, Alan Elcheikh, Farshid Feyzi, Albrecht Karle, Robert Paulos ( 2014 ) Modeling hole size, lifetime and fuel consumption in hot-water ice drilling. Annals of Glaciology , 55 , 68 , 115-123 . doi: 10.3189/2014AoG68A033|