Current trend is the need of oil companies in various flowrates ESP with sufficient head and high efficiency in order to produce fluid with lowest energy consumption. The purpose of the research is to identify the scope of the ESP centrifugal stage with vortex crown in the oil and gas industry and a detailed analysis of this type of equipment. Both numerous bench tests of vane pumps with centrifugal-vortex stages of various manufacturers were carried out, as well as a deeper study of the working process of ESP centrifugal-vortex stages with obtaining the energy characteristics of these stages using numerical experiments. The software package for computational fluid dynamics SolidWorks FlowSimulation was used to carry out the computational study. The dependence of the impeller’s axial force on the flowrate, viscosity and density of the liquid for one of the Russian manufacturers of centrifugal-vortex stage was determined. The resulting dependence allows to determine the impeller ‘floating’ mode. A feature of impellers with a vortex crown has been revealed. The magnitude of the axial force acting on the impeller at modes closer to optimal flowrate is significantly less than that of impellers without a vortex crown. It has been proved that an increase in the viscosity of the pumped liquid leads to a shift in the mode of changing the direction of the axial force acting on the impeller with a vortex crown towards lower flowrates, and therefore, the impellers emerge at a significantly lower flow compared to water pumping mode, and this phenomenon negatively affects the resource of the ESP at downhole conditions.
References
1. Ageev Sh.R., Kuprin P., Mel'nikov M. et al., Highly reliable centrifugal plants for oil recovery in difficult conditions (In Russ.), Burenie i neft', 2006, no. 4, pp. 30–33.
2. Ageev Sh.R., Druzhinin E.Yu., Kryuchkova M.D., The concept of using high-speed installations of elec-tro-slurry pumps for oil production (In Russ.), Burenie i neft', 2018, no. 5, pp. 54–59.
3. Ageev Sh.R., Kuprin P.B., Maslov V.N. et al., Nadezhnye tsentrobezhnye ustanovki s maloy podachey dlya dobychi nefti v oslozhnennykh usloviyakh (Reliable low-flow centrifugal units for oil recovery in chal-lenging conditions), Moscow: Publ. of OKB. KONNAS, 2005, 98 p.
4. Trulev A.V., Sabirov A.A., Sibirev S.V. et al., Submersible ESP with wide channels in the flow path for production of formation fluid from marginal wells with a high content of solids (In Russ.), Inzhenernaya praktika, 2017, no. 1–2, pp. 60–63.
5. Dolov T.R., Donskoy Yu.A., The influence of the quality of esp stages manufacturing on their energy characteristics (In Russ.), Oborudovanie i tekhnologii dlya neftegazovogo kompleksa, 2019, no. 5 (113), pp. 16–19.
6. Dolov T.R., Donskoy Yu.A., Ivanovskiy A.V. et al., To the question of the characteristics dependence of vane pumps stages on the test conditions (In Russ.), Oborudovanie i tekhnologii dlya neftegazovogo kompleksa, 2020, no. 2 (116), pp. 23–26.
7. Guzovic Z., Predin A., Performances and flow analysis in the centrifugal Vortex pump, Journal of Fluids Engineering, 2014, V. 135, pp. 117–125.
8. Mihalić T., Guzović Z., Predin A., CFD flow analysis in the centrifugal vortex pump, International Jour-nal of Numerical Methods for Heat & Fluid Flow, 2014, V. 24, no. 3, pp. 545–562.
