Research Of Structural Optimization And Numerical Simulation To Downhole Oil/water Separation Hydrocyclone

In this paper, the present development and appliance of the hydrocyclone applied downhole is introduced, and the fluid moving rule was researched by numerical simulation, and the simulation is put on the structure of the inlet and large conical section.The hydrocyclone velocity and pressure field distribution characteristics were analyzed by the Fluent software in this thesis; and also the separation efficiency change by altering the four different big cone angle, in which the angle is stable and the technics of separation is suitable for downhole separation, and provided theoretical references or the ptimization design of hydrocyclone. The restriction to the downhole radial space causes that general hydrocyclone can't work down well. The pressure loss of the hydrocyclone inlet is bigger in the total pressure loss, which accounts for 40%. By numerical simulation, the inlet with inclination angle was designed, and the appropriate inclination angle was analyzed of the equal section line inlet and the gradually oblique section line inlet, and decreased the pressure loss of the inlet \, ensure the separation efficiency in the meantime.By performing simulated experiment on the simulation is basically in accordance with the experimental data, which the numerical simulation results are very approach to the experiment result. The results prove the correctness of mathematical model and computing method.This work will provide theoretical basis and references for further research of the separation mechanism, separation characteristic and structural optimization design of the liquid-liquid hydrocyclones.