The study analyzes basic complications associated with generating mechanical impurities; numeric modeling to optimize the electrical submersible pump operation has been performed.
Modeling the fluid flow in combination with erosion models has been used to determine the key factors facilitating the erosion of the electrical submersible pump action wheel impeller during oil production. In order to obtain a complete view of the flow and erosion properties, modeling has been performed for the entire fluid flow route.
Modeling of the flow and the action wheel component erosion has been performed to determine the impact of the flow imbalance as well as to ensure the boundary conditions at the input for the modeling.
The modeling results have shown: the rotational flow introduced in the mixing point at the action wheel input significantly impacts the strength properties of the modeled object; the area most exposed to erosion is the area of the action wheel impeller.
The values of loss of material have been determined via the time sequence of geometry changes in the compounds in combination with the actual hydraulic operational parameters.
The flow trajectories proposed for modeling show that the recirculating flow is the dominant. It is widely adopted that recirculation is one of the main causes of increased erosion in the compounds of the electrical submersible pump as it leads to the high frequency of high-speed impacts by sand particles.
In order to reduce the erosion risk, the analysis aiming to identify the impeller geometrical parameters has revealed that the erosion rate in the compound can be reduced by decreasing the inclination of the action wheel impeller.
The study has demonstrated that numerical modeling can provide a detailed and precise evaluation of erosion potential in cases associated with the high velocity of fluid flow with particles of mechanical impurities.
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