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Cavitation is accompanied by numerous secondary effectsю It is a powerful factor in intensifying the processes of dispergation, emulsifying, homogenization, cleaning of deposits etc. In this article authors generalized their long-term experience on the development of science-based theoretical and technological solutions in the equipment design and technology development using the cavitation jet flow to solve the problems of the oil and gas industry. We proposed multicomponent dispersed media (drilling muds and cement slurry) using cavitation, and achieved significant positive results in the processes of wells construction and workover. Cleaning of production and tubing strings from deposits with different chemical composition and strength cuts down capital expenditure and operating costs for replacement and repair of equipment, and increases the overhaul interval. We designed improved oil recovery methods by treatment of near-wellbore zones of the productive formation during vibrowave intensification or complex physical-chemical decolmatation. We developed technologies for bottom-hole cleaning from compacted cemented clay-sand plugs, completely or partially overlapping the perforation interval, including depression. The proposed technical solutions were tested in industrial objects of the oil and gas industry in Krasnodar and Stavropol, Rostov, Tyumen, Astrakhan, Sverdlovsk and Volgograd regions, Republics of Adygea, Kalmykia and Komi, in Khanty-Mansiysk and Yamal-Nenets autonomous districts. Scientific novelty and uniqueness of the offered devices and technologies is confirmed by patents of the Russian Federation and certificates on databases. References 1. Omel'yanyuk M.V., Pakhlyan I.A., Zotov E.N., Development and testing of fluidjet technologies and devices to improve the efficiency of cleaning the bottom of wells (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2019, no. 1, pp. 69–72. 2. Omel'yanyuk M.V., Pakhlyan I.A., Production stimulation during well workover under conditions of lost circulation zone (In Russ.) Neftyanoe khozyaystvo = Oil Industry, 2019, no. 3, pp. 82–85 3. Omel'yanyuk M.V., Pakhlyan I.A., Gidrodinamicheskie i kavitatsionnye struynye tekhnologii v neftegazovom dele (Hydrodynamic and cavitation jet technology in oil and gas business), Krasnodar: Publ. of CSTU, 2017, 215 p. 4. Maslov V.V., Sovershenstvovanie tekhnologii prigotovleniya, razrabotka i vybor komponentov burovykh promyvochnykh zhidkostey dlya stroitel'stva neftyanykh i gazovykh skvazhin (Improving the technology of preparation, development and selection of drilling fluid components for the construction of oil and gas wells): thesis of candidate of technical science, Tyumen', 2007. 5. Utility patent no. 116068 RF, Kavitatsionnyy dispergator-smesitel' (Cavitation dispersant mixer), Inventors: Omel'yanyuk M.V., Pakhlyan I.A. 6. Patent no. 2694774 RF, Rotary pulsation device, Inventors: Omel'yanyuk M.V., Pakhlyan I.A., Melyukhov E.V. 7. Omel'yanyuk M.V., Razrabotka tekhnologii gidrodinamicheskoy kavitatsionnoy ochistki trub ot otlozheniy pri remonte skvazhin (Development of technology for hydrodynamic cavitation pipe cleaning from deposits during well repair): thesis of candidate of technical science, Krasnodar, 2004. 8. Patent no. 2542015 C1 RF, Rotary hydraulic vibrator, Inventors: Omel'yanyuk M.V., Pakhlyan I.A. 9. Crabtree M., Eslinger D., Fletcher P. et al., Fighting scale: Removal and prevention, Oilfield Review, 1999, V. 11, no. 3, pp. 30–45. |
