Drill Heads of the Deep Ice Electromechanical Drills
|Periodical/Journal:||Technical Report PRC 12-03, Polar Research Center, Jilin University, China|
Electromechanical drilling is widely used for recovering deep ice cores in Antarctica and Greenland. Choosing an optimal drill head design is one of the most important challenges for the development of ice drilling technology because it affects not only the efficiency of the ice cutting action, but other important drilling parameters: rate of penetration, core quality, length of the run, borehole trajectory, etc. Different schemes of ice-core drill heads are reviewed, and recommendations for designing are given.