Modelagem do escoamento monofásico em bomba centrífuga submersa operando com fluidos viscosos / On the influence of viscosity upon electrical submersible pumping performance

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

In the oil industry, when artificial lift using Electrical Submersible Pumps (ESP) is considered, there is a need to determine their performance for displacing oils of medium to high viscosity. This work proposes a model that is able to predict the performance of conventional centrifugal pumps and ESPs when pumping heavier oils (meaning oils of high viscosities). Data from experiments carried with conventional centrifugal pumps and ESPs displacing fluids of viscosity ranging from 1 cP to 1020 cP, model results and results provided by other researchers and commonly used in design procedures, were taken into account for comparisons and to provide insights for the model development. In some cases, specific and detailed measurements of pressure at different positions along the pump, from the inlet eye to the discharge section, were taken. They contributed to the model development and to understand the mechanics of the energy transfer and the conversion processes that the flow undergoes along a pump single stage or throughout the entire equipment. To obtain the experimental data a set-up was built, where one conventional centrifugal pump and two ESPs were tested. The test fluids were water (1 cP) and glycerin in different temperatures to vary the viscosity from 60 cP to 1020 cP. A heat pump and a heat exchanger were connected to the pumping system for that. The experimental results, data found in the literature and the benchmark results published by the manufacturers for pumps operating with water were compared with results calculated by the proposed model to validate it. Finally, a comparison between the experimental results and the data calculated using the procedures of the Hydraulic Institute - USA, to calculate centrifugal pump performance for viscous fluids, is presented

ASSUNTO(S)

viscous fluid bombas centrífugas petróleos pesados fluido viscoso petróleo pumps centrifuges heavy oil oil

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