Authors: L.E. Mametyev, A.A. Khoreshok, A.M. Tsekhin, A.Yu. Borisov

Title of the article: Justification of rational parameters of the well expander

Year: 2018, Issue: 6, Pages: 40-46

Index UDK: 622.24.051.57

DOI: 10.26730/1816-4528-2018-6-40-46

Abstract: Researches on improvement of process of well-drilling in coal seams in mines of Kuzbass are relevant now. The objective of the research was to justify rational parameters of the advancing well expander, the scheme of group cutting tool arrangement on its body. The analysis of drilling big diameter wells in coal seams has shown that when deadlock wellsarebeing driven, me-thane and small fractions of coal accumulate in the face area.Decreasing the yield of coal fractions of ω0–1 and ω1–6 class will allow us to increase safety of drilling operations. The most acceptable solution of this issue is to develop an expander design and the slot-hole scheme of the well face surface. The parameters of the slot-hole scheme are set and the group cutting tool is matched to it. In the course of the stu-dies at the full-size stand, regularities of load formation, frequency characteristics of slot cutting in the coal cement block by various groups of cutters, a starting bit and in general by the expander are determined. Mutual correlation between groups of cutters of the expander is defined, and groups of cutters which perform the main role in forming loading, torque on the expander at well-drilling are identified. Analytical expressions of correlation functions and spectral density of torques for various groups of cutters and the expander in general are received.

Key words: stand coal cement block expander of wells slot-hole scheme group of cutters correlation function spectral density torque

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