The influence of surface phenomena on the stability of wellbore von Ya. S. Kotskulych, Yu. Mocherniuk, O. B. Martsynkiv

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Using rotary-control systems in the construction of obliquely-directed wells von Ya. S. Kotskulych, V. H. Vitryk, A. M. Livinskyi

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Drilling of the sidelong shaft of the well 308-dolyna using double-inhibited low-clay emulsion drilling fluid von Ya. S. Kotskulych, B. A. Tershak, A. M. Andrusiak, Ye. Ya. Kotskulych

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