Modeling of “combined cutter - cone” connection in tricone drill bits

Надіслано: Жовтень 25, 2019
Переглянуто: Грудень 22, 2019
Прийнято: Грудень 28, 2019
Lviv Polytechnic National University
Lviv Polytechnic National University
Національний університет «Львівська політехніка»

A theoretical analysis of the stiffness of the “cutter-cone” connection was performed. In the article the character and magnitude of the tension at the contact of "cutter-cone" are investigated. An analysis of the surface of the openings for carbide inserts revealed traces of plastic deformation and fretting wear. Since the contact bond of the cutter with the body of cone is the only factor that provides the strength of the connection, let consider the effect of mechanical properties of the cones body and a cutter on the magnitude of the forces of contact and tension in the connection. The surface of the shaft of this design consists of equal parts of solid alloy and steel. If you make a ring at a smaller diameter of the shank of a carbide cutter, this will increase the reliability of the connection of the insertion with the body of the rock cutting tool, optimize toughness of cutter fastening, and ensure high stability of the hard-alloyed inset cutter before fracture.

As a result of the conducted researches, a qualitative correlation between the hardness of the carbide insertion fastening in the holes of cone and the nature of the destruction of the carbide cutters has been established. Due to the conducted research, the character of the distribution of contact tensions in the conjugated areas “combined cutter - a hole of cone” was established. The theme of the development of new rational constructions of rock-destructive equipment of cones, rock-destructive inserts, schemes of its effective arrangement on the brushes of cone is still actual. A separate issue of further research is the study of functional and energy interaction of elements of propulsion and rock-destructive equipment.

[1] A. Slipchuk, and A Kuk, “Evaluation of the permissible moment in a roller cone drill bit providing the prescribed reliability of work”, Ukrainian Journal of Mechanical Engineering and Materials Science, vol. 4, no 1, pp. 116–124, 2018. [in Ukrainian].

[2] K. Bybee, “Drilling Performance of an Energy-Balanced Roller-Cone Bit”, Journal of Petroleum Technology, vol. 12, pp. 49–50, 2003.

[3] J. D. Schroder, “Cone Retention and Tapered Bearing Preload System for Roller Cone Bit”, US patent US20130105229A1, May 2, 2013.

[4] Z. Huang, Q. Li, Y. Zhou, S. Jing, Y. Ma, W. Hu, and Y. Fan, “Experimental research on the surface strengthening technology of roller cone bit bearing based on the failure analysis”, Engineering failure analysis, vol. 29, pp. 12–26, Apr. 2013.

[5] S. Naganawa, “Feasibility study on roller-cone bit wear detection from axial bit vibration”, Journal of petroleum science and engineering, no. 82–83, pp. 140–150, 2012.

[6] E. I. Kryzhanivs'kyi, R. S. Yakym, L. E. Shmandrovs'kyi, and Yu. D. Petryna, “Contact fracture of rolling bodies of open bearings of three-cone rock bits in aqueous environment”, Materials science journal, vol. 46 (5), pp. 607–612, 2011.

[7] Y. Deng, M. Chen, Y. Jin, Y. Zhang, D. Zou, and Y. Lu, “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, vol. 36, pp. 117–123, 2016.

[8] A. Nabilou, “Effect of Parameters of Selection and Replacement Drilling Bits Based on Geo-Mechanical Factors: (Case Study: Gas and Oil Reservoir in the Southwest of Iran)”, American Journal of Engineering and Applied Sciences, vol. 9, no. 2, pp. 380–385, May, 2016.

[9] A. Slipchuk, and Y. Datsishin, “Improving the quality technology pressing of tungsten carbide inset cutter in roller cone bit”. in Proc. 7th Int. Conf. “LITTERIS ET ARTIBUS”, Lviv, Ukraine, November 23–25, 2017, pp. 252–253.

[10] A. M. Slipchuk, and R. S. Jakum, “Doslidzhennya stiykosti reheneratsiyi «kombinovanyy zub-sharoshka» burovykh doliv na vidpovidniy 3-D modeli” [“Reseach of strength in connection «Combined tungsten carbide inset cutter-cone» of roller cone drill bit for example 3-D model”], Visnyk Natsionalʹnoho tekhnichnoho universytetu «Kharkivsʹkyy politekhnichnyy instytut». Seriya: Tekhnolohiyi v mashynobuduvanni [Bulletin of the National Technical University «Kharkiv Polytechnic Institute». Series: Technologies in mechanical engineering], vol. 34 (1310), pp. 15–21, 2018. [in Ukrainian].

A. Slipchuk, A. Kuk, Y. Kusyi, "Analysis and improvement of design diagrams and mathematical models of vibratory lapping machines", Ukrainian Journal of Mechanical Engineering and Materials Science, vol. 5, no. 3-4, pp. 70-76, 2019.