The plugging mechanism of multiphase mixed rich-liquid transportation in submarine pipeline is a prerequisite for maintaining the fluid flow in the pipeline and ensuring safe fluid flow. This paper introduced the common experimental devices used to study multiphase flow, and summarized the plugging progress and mechanism in the liquid-rich system. Besides, it divided the rich-liquid phase system into an oil-based system, a partially dispersed system, and a water-based system according to the different water cuts, and discussed the mechanism of hydrate plugging. Moreover, it summarized the mechanism and the use of anti-agglomerates in different systems. Furthermore, it proposed some suggestions for future research on hydrate plugging. First, in the oil-based system, the effect factors of hydrates are combined with the mechanical properties of hydrate deposit layer, and the hydrate plugging mechanism models at inclined and elbow pipes should be established. Second, the mechanism of oil-water emulsion breaking in partially dispersed system and the reason for the migration of the oil-water interface should be analyzed, and the property of the free water layer on the hydrate plugging process should be quantified. Third, a complete model of the effect of the synergy of liquid bridge force and van der Waals force in the water-based system on the hydrate particle coalescence frequency model is needed, and the coalescence frequency model should be summarized. Next, the dynamic analysis of a multiphase mixed rich-liquid transportation pipeline should be coupled with the process of hydrate coalescence, deposition, and blockage decomposition. Finally, the effects of anti-agglomerates on the morphological evolution of hydrate under different systems and pipeline plugging conditions in different media should be further explored.

海底管道中多相混合浓液运输的堵塞机理是维持管道中的流体流动并确保安全的流体流动的前提。介绍了用于研究多相流的常用实验装置，并总结了富液系统中的堵塞过程和机理。此外，根据含水率的不同，将富液相体系分为油基体系，部分分散体系和水基体系，并探讨了水合物堵塞的机理。此外，它总结了抗凝聚剂在不同系统中的作用机理和用途。此外，它为水合物堵塞的未来研究提出了一些建议。首先，在油基系统中 将水合物的影响因素与水合物沉积层的力学性能结合起来，建立斜管和弯头管的水合物堵塞机理模型。其次，应分析部分分散体系中油水乳状液的破坏机理和油水界面迁移的原因，并定量水合物堵塞过程中自由水层的性质。第三，需要一个完整的水基体系中水桥力和范德华力协同作用对水合物颗粒聚结频率模型影响的模型，并应总结聚结频率模型。接下来，多相混合浓液输送管道的动力学分析应与水合物聚结，沉积，和阻塞分解。最后，应进一步探讨抗结块剂在不同介质和不同介质管道堵塞条件下对水合物形态演化的影响。