Research of the wear impact of mechanical impurities particles on the electric-centrifugal pumps nodes
One of the most common complicating factors that have a negative impact on the service life of electric-centrifugal pumps (ECP) for oil production is mechanical impurities presence in the pumped well fluid. The relevance of the problem in relation to the research of abrasive wear of electric centrifugal pump units has been substantiated. The construction and principle of operation of the bench installation for testing the working stages of electric centrifugal pumps is described. The methodological grounds of conducting accelerated tests of ECP, that provide a qualitative assessment of the service life of the ECP working stages of various construction, is described. The results of the study of the hydro-abrasive wear of VNN5A-100 working stages are presented. The ECP stages were subjected to expedient bench testing at different rotation frequencies of the drive motor shaft with an increased concentration of solid abrasive particles in the model fluid. The wear effect of the seals of the electric centrifugal pump working stages on its characteristics was evaluated. The main destruction zones of the ECP working stages, subjected to the influence of mechanical impurities particles contained in the pumped liquid flow are identified. The factors affecting the hydro-abrasive wear intensity of ECP working stages are determined.