Theoretical and experimental research into process of packing in drilling

The theoretical and experimental research into the process of packing in drilling is reviewed. The causes of packing on the surface of rock-breaking drill tool and the ways of its prevention are identified. The packing process was analyzed from the viewpoints of drilling fluid dynamics and drilling bit cutting structure dynamics, and in both cases, the problem was considered with two purposes: elimination of packers and prevention of packing. Most rolling cutter bits manufactured by various firms in the world have two basic circuits of flushing—central and side waterways (jet flushing). This article, as against the other publications on this subject, describes advantages and disadvantages of the two standard variants, as well as their combination for bottomhole cleaning. For packing prevention, scientists suggest adding of agents in drilling fluids, but the majority of the suggestions are based on tests of special cases. Furthermore, the research shows that the calculated kinetic criteria of efficiency only indirectly influence systems of bottomhole cleaning from chips and on durability of support bearings of roller cutters. The authors have examined the washout dynamics and the drilling bit cutting structure dynamics and think the correctly selected design of hydrodynamic units and structure of the bit can reduce or even prevent packing.

Acknowledgements:
For citation:

Toshniyozov L. G., Toshov J. B. Theoretical and experimental research into process of packing in drilling. MIAB. Mining Inf. Anal. Bull. 2019;(11):139-151. [In Russ]. DOI: 10.25018/02361493-2019-11-0-139-151.

Issue number: 11
Year: 2019
Page number: 139-151
ISBN: 0236-1493
UDK: 622.235
DOI: 10.25018/0236-1493-2019-11-0-139-151
Authors: Toshniyozov L. G., Toshov J. B.
About authors:

J.B. Toshov1, Dr. Sci. (Eng.), Assistant Professor, e-mail: toshov@tdtu.uz,
L.G. Toshniyozov1, PhD candidate, e-mail toshniyozovlaziz@gmail.com,
1 Tashkent State Technical University, 100095, Tashkent, Uzbekistan.

Keywords: Packing, drill bit, drilling process, drilling fluid, hydrodynamics of units, drilling bit cutting structure dynamics, cleansing agents, support, mud.
Bibliography:

1. Changheon Song, Jintai Chung, Jae-Sang Cho, Yun-Joo Nam Optimal Design Parameters of a Percussive Drilling System for Efficiency Improvement. Research Article. Advances in Materials Science and Engineering. Vol. 2018, 13 p. https://doi.org/10.1155/2018/2346598.
2. Babichev A. A. Sozdanie effektivnogo vooruzheniya sharoshechnykh dolot dlya razburivaniya myagkikh i myagkosrednikh porod [Creating effective armaments of cone bits for drilling soft and medium soft rocks], Candidate’s thesis, Moscow, 2008, 24 p.
3. Martel A. S., Morenov V. A., Leusheva E. L. Investigation mud compositions for drilling mudstone and preventing formation of seals. Bulatovskie chteniya. 2017, Vol. 3, pp. 170—176. [In Russ].
4. Toshov J. B. Improving the efficiency of drilling explosive wells by optimizing the three components of the dynamics of drill bits. Gornyy informatsionno-analiticheskiy byulleten’. 2014, no 6, pp. 281—285. [In Russ].
5. Matveev Yu. G., Popov A. N., Torgashov A. V., Batalov S. P. Patent RU 2096578, 20.11.1997.
6. Sakuntala N., Dewangan S., Chattopadhyaya S., Krolczyk G., Hloch S. Discussion on importance of tungsten carbide — Cobalt (Wc-Co) cemented carbide and its critical characterization for wear mechanisms based on mining applications. Archives of Mining Sciences. 2018. No 1, pp. 229—246.
7. Steklyanov B. L., Rakhimov P. M., Valiev K. G., Bariev M. B. Theoretical aspects of the bit balling of oil seals when drilling wells. Uzbekskiy zhurnal nefti i gaza. 2003, no 2, pp. 20—22. [In Russ].
8. Kalashnikov Yu. T. Patent SU1025860/A1, 1983.
9. Protasov Yu. I. Razrushenie gornykh porod. Uchebnik [Destruction of rocks. Textbook], Moscow, MGGU, 2002, 324 p.
10. Steklyanov B. L. On the regularity of the energy expenditure of dynamic systems in a resistance medium. Materialy VI-mezhdunarodnoy nauchno-tekhnicheskoy konferentsii na temu
«Sovremennye tekhnologii i innovatsii gorno-metallurgicheskoy otrasli». Navoi, 2013, pp. 188—189. [In Russ].
11. Deng Yong, et al. Theoretical and experimental study on the penetration rate for roller cone bits based on the rock dynamic strength and drilling parameters. Journal of Natural Gas Science and Engineering, 2016, vol. 36, pp. 117—123.
12. Schroder J., Pasquale M. D., Richards A. Bearing innovations extend roller-cone bit life. Oil & Gas Journal. 2016, 114 (6), pp. 50—55.
13. Toshov J. B. Ways towards optimization of washout components of rock cutting tools. Gornyy zhurnal. 2016, no 2, pp. 21—23. DOI: 10.17580/gzh.2016.02.04.
14. Latyshev O. G. Razrushenie gornykh porod: uchebnik [Destruction of rocks: Textbook], Moscow, Teplotekhnik, 2007, 660 p.
15. Voytenko V. S., Smychnik A. D., Tukhto A. A. Tekhnologiya i tekhnika bureniya: uchebnoe posobie. T. 1: Gornye porody i burovaya tekhnika [Drilling technology and technology: Educational ai,. Vol. 1: Rocks and drilling equipment], Moscow, INFRA-M, 2016, 237 p.
16. Shilov A. G., Glichev V. A. Prevention of bit balling when drilling in clay deposits. Upravlenie kachestvom v neftegazovom komplekse. 2013, no 4, pp. 60—62. [In Russ].
17. What you need to know about drilling bit balling up and how to troubleshooting it: [www.drillingformulas.com]. URL: http://www.drillingformulas.com/what-you-need-to-know-about-drilling-bit-balling-up-and-how-to-troubleshooting-it/ (accessed 14.02.2019).
18. Toshov J. B. Optimizatsiya dinamiki porodorazrushayushchikh instrumentov pri burenii vzryvnykh skvazhin na otkrytykh gornykh rabotakh [Optimization of the dynamics of rock-destroying
tools while drilling blast holes in open pit mining], Doctor’s thesis, Navoi, 2017, 55 p.

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