Submarine Decommissioning: Investing Pays Off, Concludes Decom Engineering.

Written by Paulo Nogueira

Published on 11/01/2024 at 08:49

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Decom Engineering Completed Its Largest Submarine Chopsaw Deployment to Date in the North Sea, Achieving Substantial Submarine Decommissioning Time Savings.

The R&D company successfully completed the first use of its latest underwater cutting equipment, achieving an extraordinary time savings of nearly 300% in its first decommissioning project submarine

After investing US$ 1.2 million (£ 1 million) in the development of the new underwater cutting equipment – the C1-46 – the US-based offshore decommissioning technology company stated that the investment paid off after ‘surprising results’ in its first use. Additionally, the company effectively decommissioned old equipment.

Submarine Decommissioning of Subsea Infrastructure: C1-46 Submarine Chopsaw in Action

The C1-46 Chopsaw was used in a subsea infrastructure decommissioning project on behalf of DeepOcean in the northern basin of the North Sea. The project involved the removal of pipelines, control umbilicals, and various subsea structures from the seabed in water depths of up to 180 meters, each requiring precise and efficient cuts.

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Efficient Decommissioning with the C1-46 Submarine Chopsaw

According to Decom Engineering, the C1-46 exceeded all expectations, averaging 15 cuts before needing a blade change, significantly reducing the need for recovery to the surface.

The Chopsaw, designed for operation in water depths of up to 2,000 meters and capable of cutting tubular pipes and other materials up to 46′ in diameter, completed 79 cuts in its first deployment, achieving a 100% success rate.

Submarine Decommissioning Pushing Boundaries and Engineering Innovation

Powered from above and by an ROV using a hydraulic power unit (HPU), winch, hot knives, and control panel, the C1-46 was accompanied by a smaller unit, C1-24 to complete the task.

Moreover, Decom’s innovative approach to reducing seabed dredging time by modifying saw clamps reduced dredging time from 3.5 hours to just 30 minutes, the company claims.

Submarine Decommissioning: Technology and Efficiency in Engineering

‘The C1-46 Chopsaw is a remarkable piece of subsea engineering that was designed, developed, and deployed in less than six months, specifically for this North Sea decommissioning campaign.

‘This project underscored our commitment to engineering innovation and highlighted our credentials to push the limits of what is possible in submarine decommissioning. Cutting an armored concrete-coated submerged pipe of 1,042 mm efficiently has its challenges, but the C1-46 was more than up to that difficult task.

‘It has been a valuable learning experience, and the performance of the C1-46 Chopsaw sets the benchmark for the implementation of our technologies that offer multiple benefits to contractors and operators involved in complex submarine decommissioning projects,‘ said Sean Conway, Managing Director of Decom Engineering. Deactivation

Submarine Decommissioning: Investing Pays Off, Concludes Decom Engineering.

Decom Engineering Completed Its Largest Submarine Chopsaw Deployment to Date in the North Sea, Achieving Substantial Submarine Decommissioning Time Savings.

Submarine Decommissioning of Subsea Infrastructure: C1-46 Submarine Chopsaw in Action

Efficient Decommissioning with the C1-46 Submarine Chopsaw

Submarine Decommissioning Pushing Boundaries and Engineering Innovation

Submarine Decommissioning: Technology and Efficiency in Engineering

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Submarine Decommissioning: Investing Pays Off, Concludes Decom Engineering.

Decom Engineering Completed Its Largest Submarine Chopsaw Deployment to Date in the North Sea, Achieving Substantial Submarine Decommissioning Time Savings.

Submarine Decommissioning of Subsea Infrastructure: C1-46 Submarine Chopsaw in Action

Efficient Decommissioning with the C1-46 Submarine Chopsaw

Submarine Decommissioning Pushing Boundaries and Engineering Innovation

Submarine Decommissioning: Technology and Efficiency in Engineering

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With a wingspan of 152 meters, 76 tires, and a capacity to carry 1,270 tons, the Boeing Pelican was the giant “flying ship” that promised to cross oceans close to the water on an invisible air cushion beneath its wings.

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