Designing new generation drill bits with optimal axial eccentricity

The technical and economic performance of well drilling largely depends on the design of a drilling tool. Inconsistency of the drill bit design with the geotechnical conditions decreases the rate of drilling and shortens the service life of the tool, which, in turn, increases the drilling cost and electrical energy consumption. For enhancing the productivity and performance of drilling tools, new design solutions are required. This article presents the structure of the lab-scale bench tester for studying the process of cutting–abrasive drilling with a drill bit. The authors discuss the ways of improving performance of the new-design drill bits by ensuring uniform loading and wear of the bit teeth on the novel bench tester to practice the mechanism of rock destruction at well bottom. Optimization of the bit teeth paths and well bottom coverage is addressed. The new-generation drill bits designed with assistance of the new bench tester will be advantageous for the uniform wear of teeth, certain number of gear ratios, as well as for the equal contact and volumetric destruction per drill bit teeth. Furthermore, with increase in the axial load on the bit, the drill performance will increase evenly over the well bottom area, and no computational formulas are required for determining the most effective number of teeth.

Keywords: drill bit, turning pair, cutting–abrasive drilling, bench tester, trajectory, working matrix, uniform work of teeth, parallel rotation axis.
For citation:

Toshov J. B., Toshov B. R., Baratov B. N., Haqberdiyev A. L. Designing new generation drill bits with optimal axial eccentricity. MIAB. Mining Inf. Anal. Bull. 2022;(9):133142. [In Russ]. DOI: 10.25018/0236_1493_2022_9_0_133.

Acknowledgements:
Issue number: 9
Year: 2022
Page number: 133-142
ISBN: 0236-1493
UDK: 622.235
DOI: 10.25018/0236_1493_2022_9_0_133
Article receipt date: 27.08.2021
Date of review receipt: 19.10.2021
Date of the editorial board′s decision on the article′s publishing: 10.08.2022
About authors:

J.B. Toshov1, Dr. Sci. (Eng.), Professor, e-mail: toshov@tdtu.uz,
B.R. Toshov, Cand. Sci. (Phys. Mathem.), e-mail: toshov_b@mail.ru, Navoi State Mining Institute, 210102, Navoi, Uzbekistan,
B.N. Baratov1, Graduate Student, e-mail: Bakhtiyor.baratov@yandex.ru,
A.L. Haqberdiyev1, Assistant Professor, e-mail: alim.haqberdiyev2017@yandex.ru, ORCID ID: 0000-0002-8386-4036,
1 Tashkent State Technical University, 100095, Tashkent, Uzbekistan.

 

For contacts:

B.N. Baratov, e-mail: Bakhtiyor.baratov@yandex.ru.

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