油气田高压三通管件冲蚀磨损研究

Research on Erosion Wear of Tee Joint During Hydraulic Fracturing Slurry Flow

为准确掌握高压三通管件在不同工况下管内多相流的流动规律以及冲蚀磨损破坏情况,在高压管汇材料冲蚀磨损试验的基础上,应用计算流体力学方法及FLUNT软件建立了适合于水力压裂工况的液固两相流数学模型及冲蚀计算模型,得到了在不同流动方式下,三通管件内液相及固体粒子的流动规律以及三通管件冲蚀磨损的分布规律,研究结果可以为油气田高压管汇的设计、制造、重点部位的监测等安全防护技术提供参考依据。

In order to accurately obtain the specific erosive wear distribution as well as the multiphase flow mechanism of the high pressure pipe joints, based on the erosive wear testing experiment for high pressure pipe joint materials, this paper adopts Computational fluid dynamics （CFD） analysis and ANSYS-FLUNT software to build the solid- flow phase mathematical model, which is suitable for hydraulic fracturing working condition. The particulate phaseis introduced in the fluid by utilizing the discrete phase model （DPM） in a Lagrangian frame of reference inthe continuous phase, adopting a Lagrange frame ofeoordinates and leading to the computation of the particletrajectories. The flow of liquid and solid particles and erosion wear distribution under different flow patterns in tee Joint were obtained. The consistency of the proposed research may provide references for the safety technology of high pressure pipe joints such as the optimization design and key component monitoring.