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Information × Registration Number 0219U004905, 0116U001834 , R & D reports Title Development of high efficiency DTH-hummers popup.stage_title Head Khrutskij Andrej Alexandrovich, Registration Date 06-12-2019 Organization Kryvy Rih National University popup.description2 A solution is proposed, which allows to increase the drilling speed of explosive wells by increasing the volume of rock destroyed in one blow by effectively bringing the impact energy to the face, as well as improving the technical and economic performance of the entire drilling process by reducing the cost of the drilling tool, due to not only the drill bit can be replaced, but only the most worn parts. Product Description popup.authors Чумак Юрій Іванович popup.nrat_date 2020-04-02 Close