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TY - JOUR AU - Chudyk, I. I. AU - Hrydzhuk, Ya. S. AU - Yurych, L. R. PY - 2018/11/21 Y2 - 2024/03/28 TI - Estimation of mechanical energy consumption of the drill string in rotary drilling JF - Oil and Gas Power Engineering JA - ogpe VL - IS - 2(30) SE - POWER ENGINEERING, CONTROL AND DIAGNOSTICS OF OIL AND GAS COMPLEX FACILITIES DO - 10.31471/1993-9868-2018-2(30)-17-24 UR - https://nge.nung.edu.ua/index.php/nge/article/view/466 SP - 17-24 AB - <p><em><span style="vertical-align: inherit;"><span style="vertical-align: inherit;">The article is devoted to the study of dynamic phenomena in the drill string based on energy positions. The<br>friction of mechanical transmissions in rotor drive, curved sections of the drill string on drill-hole walls in the<br>drilling mud and change in the torque on the bit are the main causes of the mechanical energy consumption in the&nbsp;process of drilling. In this case, the required engine power is used for to provide drill string rotation in the well with&nbsp;some unevenness and bottom-hole deepening.&nbsp;</span></span></em></p><p><em><span style="vertical-align: inherit;"><span style="vertical-align: inherit;">The power balance equation of the mechanical system “power drive–drill string–bottom hole” is analyzed. The<br>authors have developed the problem for defining the kinetic energy of drill string in rotor drilling, which is spent on&nbsp;overcoming the friction in drive transmissions and drill string on drill-hole walls in the drilling mud as well as on&nbsp;drilling the bottom hole. The use of the defined mathematical dependencies is demonstrated by the nomograph for&nbsp;determining the friction power in case of drill string free run in the well. The obtained results of theoretical&nbsp;research can be used by engineering and manufacturing divisions of drilling enterprises for the engineering&nbsp;estimate of energy consumption in rotary drilling. </span></span></em></p> ER -