Authors: V.V. Neskoromnykh, I.R. Belozerov, K.A. Bovin

Title of the article: Economic criterion of the efficiency of recovery measures of weared drill bits

Year: 2021, Issue: 1, Pages: 27-32

Branch of knowledge: 05.05.06 Mining machines

Index UDK: 622.233

DOI: 10.26730/1816-4528-2021-1-27-32

Abstract: The cost of three-cone drill bits is quite high, and the reasons for it replacement under production conditions are not always determined by the full use of the resource. In some cases, bits that have worked out a certain volume still have some potential for use after repair and restoration work. At the same time, it is important to objectively determine the feasibility of such works, entailing certain costs, namely, whether the restoration of bits will be beneficial in comparison with the option of completely replacing a worn-out bit with a new one. The study of the economic feasibility of using remanufactured drill bits was carried out by OJSC Krutokachensky crushed stone plant. For research, analytical and statistical methods were used, which made it possible to derive a criterion for the effectiveness of repair and restoration measures for used drill bits. The studies carried out have shown not only the economic efficiency of recovery measures, but also the maintainability of drill bits, which makes it possible to reduce the cost of drilling tools and, as a consequence, for drilling and blasting operations in general. In addition, the development of technical measures aimed at the repair of quickly wearing out parts of the bit, the introduction of intermediate flushing operations into the operational cycle, allow balancing the resource of structural elements.

Key words: drill bit bit durability restoration of bit performance drill cuttings operational cycle economic efficiency

Receiving date: 16.12.2020

Publication date: 29.04.2021

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