New vanishing chip and its tests in laboratory conditions von B. T. Ratov, B. V. Fedorov, A. R. Bajboz, D. R. Korgasbekov

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Drilling carbide rock cutting tool of a new type von A. A. Kozhevnikov, E. T. Besimbaev, B. T. Ratov, V. L. Khomenko, A. R. Bajboz

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Influence of the thickness of the wall of the drilling pipe on the length of the semi-final in the comprised combined drilling column von A. A. Kozhevnikov, Ju. L. Kuzin, A. A. Leksikov, B. T. Ratov, A. R. Bajboz

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