In spite of the certain success in ice drilling technology, there are enough accident examples of the deep coring in so-called warm ice, which is characterized by the increasing of ice crystals and has temperatures closed to the pressure melting point. The generally accepted recommendations for choosing of rational drilling parameters in such ice don’t exist. The low reliability of the drilling process as often as not resulted to the one of the most severe accident in the hole – sticking of the core drills. The effective accident elimination is possible due to the ice dissolving in the sticking zone by the delivery in this zone of the solvent active to ice, for example, ethylene glycol or its aqueous solution.
Deep drilling of glaciers and ice sheets is currently one of the main and most informative ways to study the current state and evolution of the glaciation of our planet. As it is known, there are no absolutely vertical boreholes, all boreholes have deviations. In case of drilling accidents causing jamming of the drill bit in the borehole, the main task is to deviate, bypass the drill bit to continue further drilling. In order to perform these operations, it is necessary to know the regularities of the drill bit behavior in the borehole. The article describes the regularity of change of spatial position of the drill bit.
