Study of the stress strain of rock massif in the crooked wellbore.
Miroslava Černova, Âroslav Kunĉak
Vol. 31, no. 4 (2014), s. 507-511, 
We investigated the stressed-deformed state of rock mass in a deviated borehole. There were received the analytical dependencies for the determination of circular and radial stress that allows for a science-based approach to the design of a borehole profile during the drilling process in the uneven horizon of rock mass of such reservoirs as Dnipro-Donetsk Depression and Black Sea Shelf and the construction of hydroacoustic directional energy devices with controlled parameters.