ОСОБЛИВОСТІ ДЕЯКИХ ВЗАЄМОДІЙ, СУПРОВОДЖУЮЧИХ ЦИРКУЛЯЦІЙНІ ПРОЦЕСИ В БУРОВИХ СВЕРДЛОВИНАХ

• Date: 2022
• Main Authors: Давиденко, О. М., Расцвєтаєв, В. О., Дмитрук, О. О., Коровяка, В. Є.
• Format: Article
• Language: Ukrainian
• Published: Институт сверхтвердых материалов им. В. Н. Бакуля Национальной академии наук Украины 2022
• Subjects: свердловина; поверхнево-активна речовина; циркуляція; гірська порода; адсорбція; буровий розчин; дисперсна фаза; руйнування
• Online Access: http://altis-ism.org.ua/index.php/ALTIS/article/view/252
• Journal Title: Tooling materials science

Purpose of the article was investigation of the essence of the key physical, chemical and mechanical processes occurring during the performance of the main downhole and auxiliary operations of the drilling cycle, as well as determination of the content and sequence of implementation of specific technological measures of the hydraulic program for flushing wells on the specified basis. Methods – determination of the content of the problem, preparation and formalization of the calculation scheme of the investigated object development of physicochemical and mechanical models describing the nature of the corresponding technological processes; the choice of a method for solving the assigned tasks; solving the basic mathematical dependencies of the process with the maximum use of a computational experiment; analysis of the results obtained; formulation of adequate conclusions and recommendations. The conducted studies have consistently analyzed the effect of the parameters of the cleaning agent on the downhole processes of rock destruction and maintaining the stability of the wellbore walls. The presence of a relationship between the physical, geometric and mechanical characteristics of the products of destruction and the dispersed phase of drilling fluids, as well as circulation borehole and auxiliary processes of the implementation of the hydraulic program for flushing the well, which are directly dependent on the variety of geological and technical factors, is shown. Experimental and theoretical studies of the kinetics of crushing of rocks (components of a complex drilling mud) have been carried out, taking into account the influence of the working environment on this process. Laboratory studies of the influence of the environment, which includes substances that are selectively chemisorbed at the interface, on the process of destruction of materials in ball, gas-jet and vibration grinders have been carried out. Analysis of the mechanisms of destruction of rocks during well drilling showed that they are based on wave processes, which are influenced by flushing fluids. Selective chemisorption of substances from the composition of flushing and auxiliary process fluids on the surface of rocks is the main regulator of the influence on the corresponding processes in the implementation of individual operations of the well construction cycle; the choice of substances that are selectively chemisorbed from the composition of liquids must be carried out under the condition that the ionization potentials of the adsorbent and adsorbate are equal. For the conditions of construction of wells for various purposes, further development of the provisions of the mechanics of destruction of rocks and the physical chemistry of surface phenomena is proposed, in particular, the mechanism of the processes occurring at the boundaries of the "rock – process fluid" interface is specified; a correlation has been established between the acting factors and the properties of rocks; a scientifically substantiated technique for the selection of surfactants to regulate the properties of the corresponding fluids is proposed; a scientific forecast for the application of the results of work in other industries is provided.