The rate of fluid leakage within the plunger-cylinder clearance is a primary factor defining the throughput coefficient of deep-well pumping systems. To prevent plunger pair gap leaking in deep-well pumps, several seals with service life periods are utilized (Gurbanov et al. in East Eur J Adv Technol 5(1)77:59–62, 2015; Mirzadzhan-zadeh and Gurbanov in Theory and practice of using deep-well pumps with hydraulic seals. “Nedra”, Moscow, 1986; Amirov et al. in Working fluid for hydraulic seals. 32566, 1971; Gurbanov and Gurbanova in Proceedings of the international symposium of mechanism and machine science, AzCIFToMM—Azerbaijan Technical University, 11–14 September, pp 191–193, 2017). Repairing and replacing seals requires fishing the pump out of the well, which involves in underground repair crews, causing production stop and other issues. In this study (Gurbanov et al. in East Eur J Adv Technol 5(1)77:59–62, 2015; Gurbanov and Gurbanova in Proceedings of the International Symposium of Mechanism and Machine Science, 2017 AzCIFToMM—Azerbaijan Technical University, 11–14 September, pp. 191–193, 2017) it is proposed to use the well flow rates as a sealing system in pumps. However, usually, well flow rates do not always provide rational sealing limits. The primary objective of this research was to improve the performance of deep-well pumping systems through the application of polymer additives. Various materials that reflect the flow characteristics of water and other fluids in microcracks are also known (Veliyev and Aslanova in Indian J Sci Technol 16:4605–4611, 2023; Veliyev and Aslanova in Eureka: Phys Eng N1:11–17, 2024;Veliyev et al. in J Eng Phys Thermophys 3:663–667, 2024). This paper explores the potential of minimizing leakage across the deep-well pump clearance by introducing polymers into the pumped fluid. The shift to deep-well pumping typically occurs during the mature stages of field development, where wells often exhibit high water cuts due to substantial depletion of formation pressure. Due to aggressively corrosive components information water, the gap between cylinder-plunger widens, causing a deep-well pump to fail quickly. This leads to a substantial decrease in the well flow rate, as the pump filling coefficient decreases and backflow increases. Under these conditions, the polymer selection is of considerable significance. The significant water cut observed in a large number of wells makes the implementation of water-soluble polymers essential. The proposed polymer must ensure a broad spectrum of viscosity modifications for the fluid mixture.