Drilling fluid circulation rate influence on the contact temperature during borehole drilling
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- Last Updated on Sunday, 11 March 2018 11:25
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Authors:
A.O. Kozhevnykov, Doctor of Technical Science, Professor,National Mining University,Professor of the Department of Mineral Prospecting Technology, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it., orcid.org/0000–0002–2708–8917
A.Yu. Dreus, Candidate of Technical Science, Associated Professor, Oles Honchar Dnipro National University, Associated professor of the Department of Fluid Mechanics and Energy and Mass Transfer, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it., orcid.org/0000-0003-0598-9287
Baochang Liu, Professor, College of Construction Engineering of the Jilin University, Professor of the Drilling Department, Chanchun, China,e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
A.K. Sudakov, Doctor of Technical Science, Professor, National Mining University,Professor of the Department of Mineral Prospecting Technology, Dnipro, Ukraine, orcid.org/0000–0003–2881–2855
Abstract:
Purpose. To establish the influence of drilling fluid circulation rate onto the contact temperature during the rotation drilling using an impregnated diamond drill bit; to verify the mathematical model of the diamond drill bit heating process in the course of boreholes drilling.
Methodology. Bench experiments and theoretical analysis using methods of mathematical modeling.
Findings. In the course of the bench experiments the data of influence of the drilling fluid circulation rate on the contact temperature during drilling of granite rock with a 59-mm diameter drill bit were obtained. A relevant mathematical model of the drill bit heating under the variable rate of drilling fluid was represented on the basis of a system of the heat transfer differential equations. A comparative analysis of experimental and predicted data was carried out, and its findings positively confirm the reliability of the mathematical modeling of heat transfer processes in the downhole during bore-hole drilling.
Originality. The methodology of experimental measuring of the contact temperature during the bench experiment borehole drilling using resistance sensors was proposed herein. New experimental data was obtained which allowed establishing a correlation between the contact temperature and the rate of drilling fluid in the downhole area. The proposed mathematical model of the process is found to be adequate; it allows predicting the temperature mode on the working face of borehole in the course of drilling. The findings of the research make it possible to substantiate the effect of the diamond core drilling performance gaining due to transition from the fixed time operation parameters to the variable ones.
Practical value. The regularities of action of the drilling fluid circulation rate on the contact temperature of the “tool – working face” system in the course of borehole drilling were established. The performed research confirmed the possibility of managing the thermal mode of drilling by variation of the drilling fluid circulation rate. The diamond core drilling performance gains, therefore, are possible to achieve by way of increasing the thermal stimulation of the mining rock. The developed mathematical model allows forecasting the contact temperature in the course of borehole drilling for various values of the drilling fluid circulation rates. Using of this model makes it possible to define the permissible diminishing of the drilling fluid circulation rate in order to prevent any abnormal thermophysical wear of the drill bit.
References.
1. Bondarenko, V., Svietkina, O. and Sai, K., 2017. Study of the formation mechanism of gas hydrates of methane in the presence of surface-active substances. Eastern-European Journal of Enterprise Technologies, 5–6(89), pp. 48–55. DOI: 10.15587/1729-4061.2017.112313.
2. Zhang, W., Sun, Q., Hao, S., Geng, J. and Lv, C., 2016. Experimental study on the variation of physical and mechanical properties of rock after high temperature treatment. Applied Thermal Engineering, 98, рр. 1297‒1304.
3. Khomenko, O. Ye. and Maltsev, D. V., 2013. Laboratory research of influence of face area dimensions on the state of uranium ore layers being broken. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 2, рр. 31–37.
4. Khomenko, O. Ye., 2012. Implementation of energy method in study of zonal disintegration of rocks. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 4, рр. 44–54.
5. Hillson, D., Tester, W. and Jefferson, 2015. Heat Transfer Properties and Dissolution Behavior of Barre Granite as Applied to Hydrothermal Jet Drilling with Chemical Enhancement Sean. Proceedings, Fortieth Workshop on Geothermal Reservoir Engineering Stanford University, Stanford, California, January, рр. 26‒28, SGP-TR-2041.
6. Kocis, I., Kristofic, T., Gajdos, M., Horvath, G. and Jankovic, S., 2015. Utilization of electrical plasma for hard rock drilling and casing milling. In:SPE/IADC Drilling Conference and Exhibition. Society of Petroleum Engineers. DOI: 10.2118/173016-MS.
7. Dreus, A. Yu., Sudakov, A. K., Kozhevnykov, A. A. and Vakhalin, Yu. N., 2016. Study of thermal strength reduction of rock formation in the diamond core drilling process using pulse flushing mode. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 3, рр. 5‒10.
8. Kryshtopa, S., Petryna, D., Bogatchuk, I., Prunko, I. and Melnyk, V., 2017. Surface Hardening of 40KH Steel by Electric-Spark Alloying. Materials Science, (53(3)), pp. 351–358.
9. Pivnyak, G., Bondarenko, V., Kovalevs’ka, I., and Illiashov, M., 2013. Mining of Mineral Deposits. London: CRC Press, Taylor & Francis Group. DOI: 10.1201/b16354.
10. Dreus, A., Kozhevnikov, A., Lysenko, K. and Sudakov, A., 2016. Investigation of heating of the drilling bits and definition of the energy efficient drilling modes. Eastern-European Journal of Enterprise Technologies, 3(7(81)), рр. 41–46.
11. Juraev, R. U. and Merkulov, M. V., 2016. Experimental study of heat power of the downhole at drilling a well using air. Mining information analytical bulletin, 1, pp. 288‒293.
12. Li, J., Guo, B., Yang, S. and Liu, G., 2014. The complexity of thermal effect on rock failure in gas-drilling shale-gas wells. Journal of Natural Gas Science and Engineering, 21, рр. 255‒259.
13. Gorman, J. M., Abraham, J. P. and Sparrow, E. M., 2014. A novel, comprehensive numerical simulation for predicting temperatures within boreholes and the adjoining rock bed. Geothermics, 50, рр. 213‒219.
14. Kryshtopa, S., Kryshtopa, L., Bogatchuk, I., Prunko, I. and Melnyk, V., 2017. Examining the effect of triboelectric phenomena on wear-friction properties of metal-polymeric frictional couples. EasternEuropean Journal of Enterprise Technologies, 1 (5), рр. 40‒45.
15. Yevtushenko, A. A., Kuciej, M. and Yevtushenko, O., 2015. Modelling of the frictional heating in brake system with thermal resistance on a contact surface and convective cooling on a free surface of a pad. International Journal of Heat and Mass Transfer, 81, рр. 915‒923.
16. Dreus, A., Lysenko, K., Kozhevnykov, A. and Liu, B., 2017. Modeling hydrodynamics of the flushing fluid intermittent flow in the hydraulic system of the diamond bit. Mining of Mineral Deposits, 11(2), pp. 84–90. DOI: 10.15407/mining11.02.084.
17. Sunden, B., 2012. Introduction to heat transfer. Southhampton: WITpress.
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