METHOD FOR CONNECTION AND TUBULAR CONNECTION ASSEMBLY FOR IMPROVED FATIGUE PERFORMANCE OF METALLIC RISERS

摘要

A method for constructing a tubular connection assembly includes forming a first tubular having a first inner diameter, a first wall thickness, and a first connection end, forming a second tubular having a second inner diameter, a second wall thickness, and a second connection end, and increasing the first wall thickness of the first connection end, increasing the first inner diameter of the first connection end, increasing the second wall thickness of the second connection end, and increasing the second inner diameter of the second connection end. The first tubular and the second tubular are attached at a weld point between the first connection end and the second connection end so as to form a tubular connection assembly with a target amount of fatigue performance. A metallic riser, such as a steel catenary riser or a steel lazy wave riser, can be formed of a plurality of tubular connection assemblies.