Research On Subsea Wellhead System With Analysis And Design Of Pack Off Assembly

With the development of national economy, the demands of oil and gas increase year by year. The hydrocarbon resources are rich in South China Sea. But wo do not own the technique and equipments now. The development of subsea wellhead system will be breakthrough point of exploratory development for deepsea equipments.Subsea wellhead system works in abominable environment and stands fluid column pressure, complexing action of stormy waves, the weight of BOP and tortuosity action for the offset of marine riser. Giving a rigorous test to subsea wellhead system. So reliable seal assembly is the gordian technique to subsea wellhead system.Researched subsea wellhead system of three external corporations. Packoff assembly as the core quipment of subsea wellhead system hold the balance, so the research was significant and valuable. This paper improved FMC packoff assembly, developed the concept of packoff—stretching seal and the problems needed to solve. Analyzed its contact stress by ABAQUS. Reseached affection of contact stress with friction coefficient of contact surface.