Projects

Aquaterra develop efficient stabilising system, achieving 80% savings over traditional methods

Lateral wave movements cause impact on caissons, risers and conductors, and their supporting steelwork. This causes fatigue and fretting damage, which is both costly and dangerous.

Existing shim-type solutions can be costly and, in some cases, unreliable, require replacement after a short period of time. The OGTC supported Aquaterra to develop new technology aimed at stabilising offshore caissons, risers and conductors, to reduce movement, increase guide stability and moderate vibrations - in the long-term extending their operational life.

The initial phase of the project developed and tested a urethane-based two component polyurethane system (including installation tests on a conductor restraint mock-up) that doesn't require specialist equipment to install and cure at low temperatures.

Industry Value

A typical shim programme costs approximately £50,000 per conductor. Using this system would result in 80% cost savings, due to the materials used, ease of installation and efficient preparation and deployment.

Technology Organisation

AquaTerra Group Ltd

AquaTerra is a leading industry specialist for difficult access operations and potentially hazardous environments.

http://www.aquaterra.co.uk

ProjectAquaTerra Group Ltd - Conductor/Caisson/Riser Stabilising System

Challenge

Asset Integrity

Vision

Fix Today

Entry TRL

3

Field Trial

No

Technology

Conductor/Caisson/Riser Stabilising System

Type

Develop

Achieved TRL

7

Technology Organisation

AquaTerra Group Ltd

AquaTerra is a leading industry specialist for difficult access operations and potentially hazardous environments.

http://www.aquaterra.co.uk

Key Results

The project was successful in identifying a suitable urethane material that is predicted to withstand the environmental loads, easy to install using mechanical aids (a mould) and does not require specialist storage, handling, or application equipment. A significant added advantage of using the material and installation methodology is that a pre-job site survey is not normally required.

Lessons Learned

The second phase of the project will undertake field trials with two operators.

Next Steps