05 May 2025

Porthos sea pipeline is ashore – pull-in successful

Last night, an important milestone was reached in the Porthos project: a successful pull-in brought the offshore CO₂ pipeline ashore.

In April 2024, LMR Drilling carried out the first drilling under the hard seawall. This horizontal directional drilling (HDD) paved the way for the pull-in of the offshore pipeline through a protective jacket pipe.

Earlier this week, Allseas’ pipeline vessel Lorelay was positioned at sea. From there, the pipeline was coupled to drilling rods, after which pull-in began – a carefully planned operation lasting more than 48 hours. The pull-in was successfully completed and the Lorelay began the next phase: laying the marine pipeline in the Maas channel, the shipping channel to the port of Rotterdam.

This progress is the result of strong cooperation and clear communication between Allseas, Porthos, LMR Drilling, DHMR, Rijkswaterstaat and the pilots, as well as the deployment of a professional on- and offshore inspection team. With this step, we are again closer to our goal: safe and sustainable CO₂ storage in the North Sea.