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2 AGH Drilling, Oil, Gas

2 2014

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Study of the stress strain of rock massif in the crooked wellbore

Chernova M, YE, Kuntsyak Y. V.

AGH Drilling, Oil, Gas

2014

Vol. 31, no. 4

507--512

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.

Influence of low frequency vibrations on drillstring dynamics

Chernova M, YE

AGH Drilling, Oil, Gas

2014

Vol. 31, no. 3

423--430

During the drilling process, between the drilling bit that ruins the rock in the bottom-hole and the energy source located on the ground surface is the drillstring that has certain length and small cross cuts that define the dynamics of the drilling bit work. Along with the development of science, for optimization of drilling processes were developed and continue to be elaborated mathematical models that use empirical dependencies based mainly on laboratory data which are very far away from the real conditions of well construction and fail to take into account all the peculiarities of this process. Thus, the management of the drillstring dynamics related to an increase in the effectiveness of deep directional and horizontal wells drilling process through the minimization of torsional and longitudinal Iow frequency vibrations of drilling instrument is a matter of topical interest nowadays.