THEORETICAL AND EXPERIMENTAL STUDY ON THE ROLLER CONE PENETRATION RATE AND EFFECTIVENESS OF ROCK DE-STRUCTION
The article presents study results of the rock roller bit penetration rate dur-ing rotary drilling. Also considered longitudinal oscillations of the roller bit body, dispersion and frequency of the first and second harmonics that depends on drilling operation mode and constructive parameters of the single-cone roller bits with vertical journals. Clarified, that first harmonic of longitudinal oscilla-tions are caused by shock loads from cutters teeth rolling, while second harmon-ic emerge from cutting loads of the compaction cores. As a result of study were obtained increase in penetration rate due to decrease of vibration level and more rigid roller bit design. Reflected from the rock signal is useful for creation an au-tomatic regulation system that controls and optimizes drilling mode in real time could be implemented based on reflected from the rock signals collected by set of sensors.