Analysis of Flow Field Characteristics and Barite Recovery Efficiency in Centrifuge
Drilling centrifuge is an important equipment for weighting drilling fluid treatment in oil field.Whether the operating parameters of centrifuge are reasonable or not is very important for the recovery efficiency of barite.Considering the flow field char-acteristics of barite in weighted drilling fluid,the transient flow field characteristics of drilling fluid harmful solid barite three-phase flow are numerically simulated based on centrifuge geometric model and flow field boundary conditions.The results indi-cate that that the thickness of barite deposition is larger the closer to the sediment tank,and the deposition thickness of cone section is much larger than that of column section.By modeling the centrifuge parameterization,the effects of centrifuge pitch,half cone Angle and blade Angle on the separation efficiency of barite were obtained.The analysis results show that the content of barite in the drilling fluid centrifuge sediment tank is much greater than the harmful solid phase,while the content of barite and harmful solid at the overflow outlet has little difference.With the increase of screw pitch,the separation and recovery efficiency of barite in the sediment pool decreased obviously,while the content of barite in the overflow outlet showed an upward trend.With the increase of half cone Angle and blade Angle,the content of barite in the sediment pool reaches the peak in a certain range.
CentrifugeFlow Field AnalysisNumerical SimulationLaw of Barite SedimentationRecovery Effi-ciency
万方数据
维普
