NEW TECHNOLOGY OF UNCOVER THE ORE HORIZON BY THE METHOD OF IN-SITU LEACHING FOR URANIUM MINING
Kuandykov T.A. Karmanov T.D. Kuldeyev E.I. Yelemessov K.K. Kaliev B.Z.
2022National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2022#2022Issue 3142 - 154 pp.
The article presents the main factors that reduce the formation permeability and the processes of artificial penetration of particles into the rock pores and cracks, as well as a list of equipment for wells drilling that convert the direct flow of drilling flush fluid into the reverse one in the bottom-hole zone. The traditional processes of preparing a well for operation and measures for processing the productive formation zone are described. The article describes new drilling methods recognized by test work in the drilling company «Volkovgeologiya» JSC. Based on research studies and analysis of the regularities of the decline of wells, an airlift method of drilling an ore zone with a specially developed design is given, as a result of which a significant effect is formed by reducing the amount of repair and restoration work and funds spent on drilling operations. The implementation of the proposed idea at the facilities of drilling companies of «Volkovgeologiya» JSC arose on the basis of the analysis of drilling technological wells associated with uranium deposits and the identified complications during drilling through rocks of the sedimentary complex (clays, sands, with layers of bedrock-argillites, aleurolites, aleurites, sandstones, limestones, gypsum, etc.). When opening productive formations composed of fine-grained sands, almost often there is a violation of their natural filtration properties, which is expressed primarily in a decrease in the permeability of the near-wellbore zone rocks as a result of the formation of a colmatation zone-a section of the well into the pores of which particles of the dispersed phase of the drilling flush fluid have penetrated. One of the features of the proposed method was initially set the task of reducing the number of repair and restoration works and the costs of carrying them out, while simultaneously solving the issue of reducing the cost of drilling, construction and increasing the productivity of technological wells. The work presents a diagram of the technological equipment and tooling developed by the authors, as well as describes the drilling technology that allows preserving the initial filtration properties of the ore-bearing horizon by reducing the amount of infiltrate squeezed by the hydrostatic pressure of the column of flushing liquid into the bottom-hole zone, which is carried out with direct supply of flushing solution down the bottom..
airlift , compressor , drilling , mud pump , ore-bearing horizon , productive layer , well
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Satbayev University, Almaty, Kazakhstan
Satbayev University
10 лет помогаем публиковать статьи Международный издатель
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