The development and widespread introduction of high-speed diamond drilling into the practice of geological exploration for solid minerals requires the study of the nature of the direct interaction of the diamond drill bit with the rock, since it is here that the main factors affecting the efficiency of rock destruction and the performance of the rock-destroying tool should be sought.

Specific properties of foams is their low density, low erosive effect on the walls of the well, increased in comparison with water carrying capacity, etc. ...

For engineering geology it is very important to take samples of soil with undisturbed structure. Especially difficult in this respect is the sampling of monoliths from frozen soils in the process of borehole sinking. In order to work out the technology of drilling wells in frozen soils, experiments were set up, in the course of which the main difficulty was the choice of the method of control over the state of structure preservation in the process of drilling ...