**3. Conclusions**

The sonic drilling technology with the use of a hydraulic cavitation vibrator is an effective means of increasing the penetration rate in rocks of medium and high hardness using commercial drilling equipment and drill bits.

The drilling rig with a cavitation hydraulic vibrator has a number of advantages over other known vibration drilling devices, such as ease of manufacture, the absence of moving parts and the elimination of the transfer of fluid vibrations to the mud pump, which increases its service life. In comparison with the hydraulic hammer drill, the resource of the drill string increases by 5 times, the operating time to failure by 40 times. The cost of one set of a hydraulic vibrator, according to forecast estimates, will not exceed one third of the cost of a set of hydraulic hammer machines (or resonant sonic drill heads).

The cavitation hydraulic vibrator fits organically into the rotary drilling technology, does not require any equipment modifications and allows intensifying the drilling processes at lower specific energy consumption compared to traditional drilling technologies.

Analysis of the results of theoretical and experimental research of the drilling with the cavitation hydraulic vibrator, allows us to draw the following conclusions:


*Mining Technology*
