Slabyi O. Dynamics of a drill tool with deep wells on the sea from floating means

This thesis is devoted to the study of the peculiarities of the dynamics of the drilling system operating well drilling in the deep sea conditions in the case of irregular sea thrill and the effects of sea currents. The paper considers the construction of the simulation model in the simulation model of the system, which includes irregular sea and sea excitement, a boat, a tension system of the riser, a drilling riser, a compensator for vertical displacements of a drill column, a drill string, a perpendicular shock absorber, a rock cutting tool and a rock on a hole . To do this, the decomposition of the investigated system was made, its structural scheme was developed, the mathematical models of its structural elements were selected, the refined model of longitudinal-transverse oscillations of the riser and the mathematical model of longitudinal oscillations of the drillstring were developed, which makes it possible, in the first approximation, to take into account the influence of deformation of the riser on the longitudinal fluctuations of the drillstring. An estimation of influence of sea excitement on dynamics of work of the drill tool is carried out. The design of a drill regulator is proposed, which aims to level the influence of the sea on the operation of the bit.