Structure removal

We offer a wide range of services to deliver application specific tooling, control and monitoring solutions for all stages of the decommissioning process. Along with special tools, we can provide control and automation functionality and monitoring sensor systems to allow for full control throughout the operation.

Structures that have deteriorated over time may require custom- engineered solutions to remove marine growth and safely remove and recover subsea and topside structures and components. Where complex removal stages are required, the process can be accelerated or simplified through the use of automation, and where required remote verification processes can be used to confirm successful completion.

With our in-house engineering capabilities, we can support many equipment and tooling needs to develop a solution that delivers benefit through improved safety, minimal technical risk and reduced vessel time in executing work scopes.

Ashtead Technology are leaders in subsea structural monitoring solutions for the deployment and recovery of heavy structures such as manifolds, templates and jackets.

During the removal of heavy structures, suction piles and other heavy lifts, it may be necessary to monitor the extraction process, particularly if the structure is suction or pin-piled. Monitoring technology can be used to ensure the structural disengagement and recovery to surface isn’t causing undue stress. This reduces the risk of structural failure.

With our in-house structural monitoring expertise, data management and software visualisation capabilities we work closely with our clients to engineer robust solutions that allow full visibility and easy to understand visualisation of what is happening to subsea structures during critical phases of extraction and recovery, reducing technical risk and costs.

Underwater Cutting Solutions (UCS) designs and engineers an extensive array of subsea and topside cutting solutions, suitable for use on caissons, pipelines, tubulars and jackets of various sizes.

The comprehensive range of UCS cutting systems includes diamond wire and dual cut bandsaws, chop saws, hydraulic shears, and abrasive waterjet cutting systems. These can be configured for diver or ROV-deployed use, as many clients move away from traditional methods of diver installation in favour of remote operations.

UCS delivers user-friendly, high performance cutting systems which can be bespoke-engineered to your exact project requirements. International technical support and operational capability is available from highly-experienced and trained UCS technicians.

The removal of natural material and preparation of the work site is often essential before any cutting or coating removal works can begin. With a range of dredge systems available from 4” to 12”, UCS engineers high-performance dredge systems to assist with the excavation of seabed sand, gravel, clay or rock.

By utilising electricity instead of hydraulics, UCS dredges offer superior suction and efficiency while eliminating the risk of harmful leakage to the environment. Our technical innovations help to improve productivity while maximising safety.