Abstract
Abstract Subsea wellhead connector plays an important role in offshore drilling operation, it meets high reliability and safety requirement by guaranteeing the preload performance. In this paper, a new effective non-frictional locking mechanism was developed, and then a connector-wellhead system finite element model was built to analyze and compare the preload capacity of connector under two main load cases. Bolts and metal gasket were the confirmed governing components. Friction and tolerances were important factors that influent preload. The experimental setup including rig and measuring equipment was described. Tensile experiments with inner pressure were performed on the prototype of connector. The experiment results and finite element analysis showed a well agreement on locking pressure, hub face separation point and friction sensitivity, which validated availability and accuracy of analysis method, and provided technical supports for other types of subsea wellhead connector.
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