SERVICES

Subsea Structures

Requirements

Install subsea equipment such as trees, wellheads or manifolds.
Protect these expensive subsea assets from potential trawl fishing damage or dropped objects.
A rig installable, cost effective trawl guard solution.
A structure to be fully overtrawlable and withstand high loadings in line with coded standards.
Alternative structure to provide a lesser more cost-effective means of protection.
Complete package from a company with decades of in-house experience.

The Solution

Aquaterra Energy can supply a range of subsea protective structures to protect a variety of subsea equipment from subsea trees, wellheads to manifolds. These can be fully ‘overtrawlable’ and withstand trawl and dropped object loadings in line with standards specified by the likes of Norsok U-001 and ISO 136221. These lateral snag loads can be in excess of 60T and as a result often require the use of independently piled structures, which again, can be accommodated by Aquaterra’s designs.

Alternatively, and something that is becoming increasingly popular with our clients, is a much smaller ‘deflector’ structure. Greatly reduced in size and lighter in nature, this provides a temporarily suspended subsea wellhead protection from dropped objects whilst at the same time being fully enclosed with sloped sides to help deflect fishing activity and other debris. This can easily be installed from a drilling rig with Aquaterra providing the necessary procedures, personnel and equipment such as running tools, drill string orientation tools, subsea cameras to enable fast and efficient installation.

Once again, Aquaterra Energy can provide a complete solution to any subsea protection requirement ensuring it is designed and optimised to meet the specific project needs.

Features & Benefits

Complete design, fabrication and installation service.
Large scale, fully overtrawlable structures to meet guidelines outlined by Norsok U-001 and ISO 136221.
Smaller, lighter ‘deflector’ structures to provide protection from dropped objects and deflect fishing activity and other debris whilst reducing corrosion.
Can be small, light weight and easily handled offshore.
Re-useable ‘deflector’ structure so can be used for more than one temporary suspension.
Fully enclosed / grated sloped sides to deflect fishing activity.
Field proven running tools and centre slot mechanisms.
Subsea camera systems to view wellhead capture during installation.

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