Boranbay Ratov. "ON SOME TRENDS IN CONSTRUCTION IMPROVEMENTS OF ROCK CUTTING TOOLS FOR DRILLING OIL AND GAS WELLS." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 15th International Multidisciplinary Scientific GeoConference SGEM2015, SCIENCE AND TECHNOLOGIES IN GEOLOGY, EXPLORATION AND MINING (2015). https://doi.org/10.5593/sgem2015/b11/s6.103