Перегляд Volume 12, Issue 3 по темі "borehole"

Зараз показуються 1-2 з 2

    • Study of the plasma flow interaction with the borehole surface in the process of its thermal reaming 

      Voloshyn, O; Potapchuk, I; Zhevzhyk, O; Yemelianenko, V; Horiachkin, V; Zhovtonoha, M; Semenenko, Ye; Таtarko, L (National Mining University, 2018-09-30)
      Purpose. Study of the plasma flow interaction with the borehole surface in the process of its thermal reaming for determination of transient temperature distribution along the borehole surface and the average coefficient ...

    • Use of the energy of parametric oscillations to improve drilling indices 

      Svitlytskyi, V; Ohorodnikov, P; Kovalchuk, Yu (National Mining University, 2018-09-30)
      Purpose. Increase of the efficiency of using energy of parametric oscillations within the assembly of drilling string bottom by means of solving nonlinear-parametric equations of a “bit – drive motor – drilled-out rock” ...