Neftyanaya Provintsiya
electronic peer-reviewed scholarly publication
Neftyanaya provintsiya No. 2(46), 2026

Reduction of vibrations during well drilling through modification of PDC bit design

R.R. Mingazov, K.R. Valyamov, G.G. Ishbayev, E.A. Kovalevskii
DOI: https://doi.org/10.25689/NP.2026.2.219-230

Abstract


The present study is devoted to extending the service life of a PDC bit. The stated objective is achieved by reducing drill string vibrations generated by the PDC bit during drilling in hard rock formations through modernization of the cutting structure of the tool.
To evaluate the influence of bit design, an aggressiveness coefficient AG was introduced and substantiated. This coefficient characterizes the change in the penetration area of PDC cutters into the rock. Experiments conducted on the ZIF-1200 test bench established a parabolic relationship between the amplitude of reactive torque oscillations and the introduced aggressiveness coefficient AG. It was found that increasing AG suppresses vibrations occurring during drilling. Field tests at a deposit in Eastern Siberia confirmed the effectiveness of the proposed approach: the footage per run reached 1000 m, which exceeds the performance of standard designs by 200–300 m, while the rate of penetration (ROP) reached 8 m/h compared to the planned 7 m/h.

Key words:

PDC bit, drilling vibrations, aggressiveness coefficient, cylindrical PDC cutter, hard rock formations, torsional vibrations

References

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Authors

R.R. Mingazov, drill bit designer, «Burintekh» Ltd
4/1 Yubileinaya St., Ufa, 450112, Russian Federation
E-mail: rafm8607@gmail.com

K.R. Valyamov, PhD, associate professor,Ufa National Research Technical University
1 Kosmonavtov St., Ufa, 450064, Russian Federation
E-mail: karimvaliam@yandex.ru

G.G. Ishbaev, DSc, Professor, General Director, «Burintekh» Ltd
4/1 Yubileinaya St., Ufa, 450112, Russian Federation
E-mail: bit@burinteh.com

E.A. Kovalevskii, PhD, Head of Department PRI CR, «Burintekh» Ltd
4/1 Yubileinaya St., Ufa, 450112, Russian Federation
E-mail: KovalevskiiEA@burinteh.ru

For citation:

R.R. Mingazov, K.R. Valyamov, G.G. Ishbayev, E.A. Kovalevskii Snizheniye vibratsiy pri burenii skvazhin za schet izmeneniya konstruktsii PDC-dolot [Reduction of vibrations during well drilling through modification of PDC bit design]. Neftyanaya Provintsiya, No. 2(46), 2026. pp. 219-230. DOI https://doi.org/10.25689/NP.2026.2.219-230. EDN QAZBFT (in Russian)

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