Prospects of the type roller cone bit alternative design von B. V. Fedorov, B. T. Ratov

Volltext

Model of deep refining wells of pdc wells with bit von B. V. Fedorov, B. T. Ratov, A. B. Sharauova

Volltext

Increasing the stability of drilling tools of a ring type at the passing of exploration wells von B. T. Ratov, B. V. Fedorov, D. R. Korgasbekov, I. Tajbergenova

Volltext

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

Volltext