ABSTRACT
The mineral and raw material base development of every country requires the exploration and development of coal, iron ore, polymetallic and other mineral deposits; this includes big depths. In connection with this a row of problems emerges. One of these problems is the drilling of deep wells (to 2000 thousand and deeper) of different purposes: geological exploration, engineering, etc. Resource charges are particularly big by the drilling of deep interval wells (100-2000 and deeper) in fast rocks.
