Горшков, Л.К.; Яковлев, А.А.; Павлов, Н.А.
(Породоразрушающий и металлообрабатывающий инструмент – техника и технология его изготовления и применения, 2010)
Rock failure mechanism in the process of drilling may be defined as oscillating process described
by difference-differential equation which goes with equation for torque factor which is
transmitted to the string through ...