Authors: M.A. Kuznetsov, A.A. Bakanov

Title of the article: Study of geometrical parameters of drilling rig rotary tools

Year: 2025, Issue: 1, Pages: 52-69

Branch of knowledge: 2.8.8 Mining machines, geotechnology (engineering)

Index UDK: 622.23.05

DOI: 10.26730/2618-7434-2025-1-52-69

Abstract: In this paper the study of static geometrical parameters of rotary drilling tools is carried out. Designs of drilling tools BI-741 and RP-42 are taken as the subject of the study. The results of the study, performed using the existing methodology for calculating static geometric parameters of drilling tools, are the dependences of the angles given in the static coordinate system on the values of the radius of the drilling tool. The study was carried out taking into account the recommended ranges of geometric parameters specified in the literature, given in the tool coordinate system. In the static coordinate system after fixing the tool in the drill rod, there is a deviation of the tool from its own axis of rotation, which in the process of drilling directly affects the durability and operation of the tool. The results of the study showed that the geometrical parameters specified in the tool system and obtained in the static coordinate system can differ to a different degree. With the help of the obtained graphs, it is possible to determine the ranges of geometric parameters in which the strength of drilling tools will have the greatest value. Thanks to the conducted research, there is a possibility to reduce the difference of parameters set in the tool and static system during tool manufacturing, which will reduce the wear of drilling tools.

Key words: mining drilling tools design of mining tools method for calculating geometric parameters unbalanced radial component of the cutting force geometric parameters

Receiving date: 16.10.2024

Approval date: 25.02.2025

Publication date: 17.06.2025

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