Customer case

Northern Light - enabling decarbonisation of industrial emissions

December 13, 2021 6 min read

Northern Light finished foundation structure

Case details

Country Norway
Company Hallingdal Bergboring AS
Industry Ships and offshore

With support from the Norwegian Government, Northern Lights is developing an open and flexible infrastructure enabling decarbonisation of Norwegian and European industry. The development is the transport and storage component of Longship, the Norwegian Government’s full-scale carbon capture and storage project.

Spirally welded piles on site from Oulainen in Finland

Spirally welded piles on site from Oulainen in Finland.

Overview of CCS process

Overview of the CCS value chain. The Northern Light component is the transportation and storage of CO2 (photo courtesy Northern Lights)

Northern Light is responsible for the transport and storage infrastructure. The onshore receiving terminal is being constructed in Øygarden, near Bergen on the West coast of Norway. Liquid CO2 will be shipped to Øygarden from large industrial sources in Norway and Europe before it is transported by pipeline 100 km offshore and injected in to a reservoir for permanent storage 2600 meters below the seabed.

The first development phase will have capacity to store 1.5 million tons of CO2 per year in the Johansen formation south of the Troll oil and gas field. The project will be scaled up as CO2 storage demand grows across Europe. CCS is necessary for decarbonisation of industries such as steel and cement and can remove as much as 90% of the CO2 emissions from these producers. Owners of the Northern Lights JV are Equinor, Shell and TotalEnergies.

"Carbon capture and storage is one of the tools needed for us to reach the Paris Agreement. We will not achieve our goals unless we capture and store CO2."

Marte Mjøs Persen, minister of Petroleum and Energy

Illustration of the Northern Light facilities at the Energy Park in Øygarden outside of Bergen

Illustration of the Northern Light facilities at the Energy Park in Øygarden outside of Bergen (Illustration: Northern Lights)

Hallingdal Bergboring has been contracted to install the large diameter steel piles used as foundation for the jetty and two dolphin points. The piles are drilled through boulder fillings on the seafloor and into intact competent rock. Steel cores are drilled into rock inside of the piles, cast out and used as bearing element for the structure.

The structure is designed to handle both vertical, horizontal and tensile loads. The dolphin point used inclined piles (1:5) to ensure enough lateral capacity. In total 28 pile points made up the jetty structure and 3 piles are used for the dolphin points. A walkway will connect the three structures contains a shore power platform for vessels.

SSAB's RD800/14.2 S355J2H was installed for the dolphin point. In all 550 meters was delivered in 18 meter lengths to site. For the jetty 2150 meter of RD1000/18 S355J2H was installed in 12 meter lengths and drilled 13 to 20 meters plus 2 meters into rock. Altogether 1100 ton of steel piles have been used in the structure.

Piles with diameter over 400 mm are spirally welded and produced in SSAB's facilities in Oulainen. Pipes from the Oulainen mill provides excellent tolerance requirements with out of roundness way below 2%. This secures efficient weld splicing of pipes due to overlapping pipe walls. If the out of roundness is to high splicing can be an issue on large diameter pipes. Execution class 2 where used in the welding procedure.

The pile installation took place from a jack-up barge. Due to a heavily inclined seabed the jack-up function was not in operation and anchors were used instead. Two rigs were operating at the same time. One to install large diameter piles (LDP) and the other to install steel core inside the LDP.

Hallingdal Bergboring’s largest rig in use in the installation of the LDP

Hallingdal Bergboring’s largest rig in use in the installation of the LDP from the jack-up barge forming the dolphin point.