Additional seabed support is often required to avoid excessive stress on a riser or umbilical at the point where it exits the j-tube. Our formworks features include: Our custom J-Tube support bags can either be pre installed on a deployment beam prior to the umbilical pull-in or post installed after pull in. Depending on the available space for the ROV to work, Subcon can tailor an installation method to suit your needs. Subcon’s bespoke supports can be designed with elevated shoulders that protect the umbilical from accelerated water velocities at the base of the structure. This reduces the fatigue in the umbilical in its overall design life. Our grouted J-Tube supports are custom designed for each application so can be designed with consideration to surrounding infrastructure and seabed configureation. As water particle velocities are accelerated around the base of offshore structures, the overall stability of the support may be compromised. Subcon has proprietary heavy density grouts that can be pumped into the support formworks to ensure stability throughout its design life.J-Tube Support Formwork
We provide dedicated J-Tube Support Formwork designed to reduce installation time and provide even support along the riser bend.
FAQ’s
Featured Products
Equipment
Case studies
Stabilisation
- X-Span
- Subsea Grouting Turntable
- SHR 350 Hose Reel
- Subcon Custom Formwork
- Subcon Standard Formwork
- 20 & 25kg Sand/Cement/Mortar Bag
- 40kg Saddle Bags
- Flying Lead Stabilisation Bags
- Offshore 2te Bulk Bags
- Offshore Bottom Opening Bags
- Articulated Concrete Mattresses
- X-Matt
- Pipe Clamping Mattress (PCM)
- GroutMat
- GabionBag
- CoastRock
- Frond Mattress
- Scour Skirts
- Sleepers
- Anchors and Clump Weights
- CoastMat
- Subcon Scour Collar
- Culverts