500 ft Stainless Steel Riser Design

I'm in need of a design for a 500 ft riser. The core of this project involves a 1" stainless steel pipe at the center, fully encased by a 4" honeycomb structure. This structure should have both inner and outer walls. Each honeycomb cell needs to be 2 inches in size, with small holes in every cell to enable the flow of various gases and liquids throughout the system. Key project specifications: - The honeycomb area will extend all the way to 50 ft from the top. Beyond that point, the 4" space will be eliminated and only the 1" pipe will continue to 500 ft. - The materials for the riser should be durable and capable of withstanding different types of flow, as the cells will be carrying a variety of gases and liquids. Ideal skills for this job would include mechanical engineering, expertise in fluid dynamics and material science, with a good understanding of honeycomb structures. Experience in designing large-scale pipelines or riser systems will be a significant advantage. 2D and 3D versions with numbers identifing each element without descriptions