Successful decommissioning job by DEME

DECOMMISIONING: The newest DP2 jack-up vessel Apollo successfully decommissed the Q1 Halfweg platform 500t topside, including its four foundation legs. Despite the stormy weather, it went very well and the platform was brought to shore for recycling. “The project is a real milestone, demonstrating the Apollo’s versatility to perform a range of duties in the energy sector and our expertise in the decommissioning field,” DEME stated.’s support of the DEME decommissioning job supported DEME with lifting plans based on the 3D study “Weight Report” by GeoSea. The lifting plan was a total report containing advice how to lift the topside safely and how to remove the Halfweg- platform and foundation legs.

Halfweg platform

The Q1 Halfweg platform was an abandoned gas production facility in the North Sea. On New Year’s Eve year a Portuguese-flagged chemical tanker hits the platform, located 28 kilometers west of Julianadorp. The struck caused damage to the platform’s four tubular steel legs and its bow. No pollution has been reported.


The Apollo is one of the two new DEME green vessels. Equipped with an 800t leg-encircling crane and long lattice legs measuring 106.8 meters. adviced DEME on previous projects before.
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Decommissioning market on the rise

According to industry experts, decommissioning will take a bigger share of the energy sector’s spending in the coming decade. For example in the Dutch sector, 77 (of the 150 remaining) platforms will be removed by 2025.

In coming decades, an increasing number of oil and gas fields will reach the end of their economic life. The government and the business industry facilitate and coordinate the re-use and re-allocation of the infrastructure in order to contribute to the energy transition. In many cases, however, re-use or re-purpose of the available hardware will not be possible. In these cases the wells will be abandoned and the hardware will be dismantled. Where possible, recycling of the hardware takes place.

Read more about decommissioning

In need of a decommissioning lifting plan? is capable of presenting a decommissioning lift plan within a month. For more information, lifting plans or specific questions, please contact us.

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