METALLIC RIGID TUBE WITH THICKER EXTREMITIES, SUBMARINE RISER, METAL RIGID TUBE MANUFACTURING SYSTEM AND THICKER EXTREMITIES

摘要

"metallic rigid pipe with thicker ends, subsea riser, process and fabrication system of metallic rigid pipe with thicker ends" the present invention refers to a metallic rigid pipe with thicker ends (t, t1, t2), a process and a system for manufacturing these rigid metal tubes (t, t1, t2), and an underwater riser, built from these rigid metal tubes (t, t1, t2), aimed at application in offshore production fields, regardless of the height of the water layer from the environment and / or contaminants from the produced fluid.