내부 유체 밀도 및 부력제 배치의 영향을 고려한 SLWR(Steel Lazy Wave Riser)의 초기 형상 연구

Abstract

The riser, which can transfer production fluid from well to the process facility on sea surface is one of the most import system for deep water field development. There are several types of riser systems, depending on the material, configuration, and layout. Steel Lazy Wave Riser (SLWR), which reduces excessive line tension at the hang-off position and fatigue damage at the touchdown point, is a riser system suitable for deep and severe environmental conditions. A lazy wave configuration can be implemented using buoyancy modules attached in the middle of the SLWR. In addition, the configuration of the SLWR can vary depending on the density and flow pattern of the production fluid. In this paper, the initial configurations of the SLWR ware evaluated based on parametric studies of changing the length ratio of the buoyancy module to the overall length and density of the internal fluid. An appropriate initial configuration of the SLWR that satisfiesthe constraints can be obtained and used as an initial configuration for the SLWR design.