Risers Design

Z-Subsea offers a very wide range of expertise in design of risers for shallow and deep water. A wide range of engineering software such as Orcaflex, Flexcom, and Sheer7 are used to obtain the design forces of the risers and estimate the effect of vortex induced vibration condition of the riser and fatigue life. The various type of risers covered in this category are:

• Single rigid risers
• Pipe-in-Pipe Risers
• Caisson risers
• Retrofit risers
• J-tubes
• Flexible riser
• Umbilicals and cables
• Steel Catenary Risers (SCR)
• Drilling and work over riser

For installation of pipelines and risers, based on the RAO of the installation vessel and given sea state and seabed condition, various software packages are used for S-Lay, J-Lay, reeled pipes, and abandonment and recovery for shallow and deep water.

The installation parameters, including lay tension, bending stress/strain, departure angle and pipeline/stinger tip separation can be optimised.