Flexible Risers and Umbilicals

Case Study 1

Gulf of Mexico Telecommunications Network

Type I DBSCs have demonstrated that connectors can be successfully installed without the need for divers; within I or J tubes on platforms in the Gulf of Mexico. The DBSCs have been used to install a fibreoptic communications network linking oil and gas production platforms and a regional operating centre. The connectors were configured to maximise the bend stiffeners torque, bending and shear forces, enabling connection to an existing platform riser tube 450ft (137m) below the surface.

Case Study 2

Neptune Deep Water Project North and South
 

Four Type II, diverless bend stiffeners are featured on two STL buoys used for the Neptune Deep Water Project North and South. The submerged turret loading (STL) buoys will be used for mooring liquefied natural gas (LNG) regasification vessels at the offshore processing, Neptune Deep Water Port.

The bend stiffeners for each of the STL buoy's will carry a gas offloading riser and umbilical. The DBSC uses ball and taper technology where female DBSC connectors are integrated into the STL buoy ahead of tow out. The DBSC male connectors are then inserted offshore to provide a secure connection for a gas offloading riser bend stiffener within a J tube and an umbilical within an I tube on each of the buoys. The risers and umbilicals are secured at the top of each respective I/J tube.

 

DBSC Test for Neptune buoy	Neptune DBSC ready for installation	Neptune DBSC connector showing bend stiffener