Research on the Dynamic Response of a Steel Catenary Riser in the Touchdown Zone under Pigging Conditions

A periodic pigging operation performed to clean off sediment and provide operators with detailed health information for a pipeline is mandatorily required. The research on pigging-induced issues the steel catenary riser (SCR), one of key parts in offshore hydrocarbon recovery pipelines between floating production system seabed, has been scarce until now. As result, there an urgent need theories guide ensure safe achieved deepwater risers. In this paper, study aiming determine effects impact load slugging dynamic response reported. SCR model was established proposed based finite element analysis (FEA) method. stress distribution displacement were investigated under conditions, consideration waves, currents, platform movements. It found that large touchdown zone (TDZ), especially point (TDP). TDZ Y (vertical) direction more significant than X (horizontal) maximum proportional weight pig, as well length slugging.