Model selection of mechanical speed drop depending on a bit type
Analysis witnessing the fact that the form of the curve showing mechanical speed drop for one type of bits doesn't depend on a bit size and operational parameters in case of their constant value in quasi-homogeneous interval is performed. While statistical processing of bits' operational showings in quasi-homogeneous rock massive there received different values of decrement and its dimensions as well as the value of initial mechanical speed depending on the model applied. So, consequently, while searching for showings' empiric dependences on operational parameters it is necessary to apply the adequate model of mechanical speed change for a definite type of a bit.