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Purpose. Increasing the technical and economic indicators of well mechanohydraulic production due to the selection of the type and optimal formulation of drilling flushing fluids. In today's conditions, the lack of energy carriers requires involving a wider range of natural phenomena in energy production, looking for reliable ways and methods of increasing the efficiency of production. The use of energy also forces the introduction of resource-saving, environmentally safe geotechnologies in the energy-intensive technological processes of mining, transportation, crushing and beneficiation of minerals in the conditions of powerful mining enterprises of Ukraine. The methods. The study of the features of the creation and implementation of a progressive complex hydraulic program for the construction of wells was carried out using modern methods of analytical analysis and experimental research, in particular by using general principles of mathematical and physical modeling, methods of processing research results in the environment of МАТHCAD, control and measuring devices and materials. Findings. Development and operational implementation of justified resource-saving ecologically safe geotechnologies and environmental protection strategies. Flushing fluid treated with direct current can be used to increase the technical and economic indicators of the well drilling process. The originality. Dependencies have been established that describe the process of formation under the influence of a rock-destructive tool of individual rock particles that are exposed to the action of the boundary layer, and others that fall into the zone of action of the laminar sublayer. A dependency has been established that describes the process of leaving parts of the sludge that are not carried away by the flow of washing liquid, which, in turn, leads to its further grinding and increased wear of the rock-crushing tool. Practical implementation. Data were obtained on the adsorption reduction of hardness, which is a consequence of the increase in the affinity of the collapsing rock to the washing liquid. This is reflected in the intensive binding of water (hydrate) shells on the inner surface of microcracks or in their mouths. The parameters for improving the efficiency of iron ore extraction in the conditions of deposits of Ukraine are given and substantiated, in particular, a careful approach to the process of regulating the pH level of cleaning agents, taking into account the geological and technical conditions of drilling operations and the intended purpose of wells

Purpose. Improving the technical and economic indicators and the degree of perfection of the process of constructive selection, justification and engineering calculation of effective schemes for the implementation of individual units of drill bits, ensuring the constancy of the process of deepening the bottom hole with high productivity and resource saving. Research methodology. Applied computational and laboratory studies of the design features of the design choice of drilling bits of new designs were carried out using modern methods of analytical analysis and experimental research, in particular, by using the general principles of mathematical and physical modeling, methods for processing research results in the EXCEL, MATHCAD environment, control and measurement systems and materials. The flow of borehole processes was modeled on experimental wells of the training drilling site of the Dnipro University of Technology using the UKB-4P drilling rig and the corresponding auxiliary tools and equipment. Research results. A critical review of research and development in the field of designing drill bits was carried out; special attention is paid to the schemes for the implementation and operation of weapons systems and analysis of the properties of materials used to manufacture individual parts of drill bit assemblies; highlights the main advantages and disadvantages of existing schemes for the execution of bits; factors of working capacity and durability of elements of bits are defined; the causes of bit wear are established and the provisions of the problem of improving the technique and technology for making drill bit assemblies are formulated. Originality. A constructive approach to the drilling bit execution system using advanced technology and the creation of a workable destructive assembly of the specified tool for well construction can be based on the principle of chain execution of the destructive body. Practical implications. Fundamentally new design schemes for the implementation of the working destructive unit of the drill bit have been created, the use of which will lead to a significant increase in the productivity of exploration and production work, a reduction in the time for auxiliary operations, and an overall increase in the efficiency and economy of the well construction process.