Underwater vision

OneSubsea is unlocking the potential of subsea technology to deliver a more sustainable energy future. With profound expertise in the field, OneSubsea understands that innovation is the key to reducing emissions in subsea energy operations.

Formed in 2023 by parent companies SLB, Aker Solutions and Subsea7, OneSubsea draws on a marine engineering heritage stretching back to the mid-1800s.

Today, the company employs its subsea experience, technological vision, and manufacturing skills to help its customers put their operations on a more sustainable footing.

“Through innovation, we’re showing that, with the right technology, cleaner resource extraction is not a distant goal – it is a present reality,” says Joakim Almqvist, Technology Manager at OneSubsea.

A deep-sea challenge

OneSubsea’s work at the Ormen Lange natural gas field exemplifies the company’s work towards sustainability through innovation. The field is in one of Norway’s most complex and technically challenging locations – deep below the sea and 120km from the coast.

With 55% of its reserves already exhausted, Ormen Lange needs a compression system to maximize recovery of the remaining gas. Natural gas is compressed for safe storage and transportation, but the process can be costly and damaging to the environment. However, working with operator Shell, OneSubsea has devised an industry-first, multiphase subsea compression system that uses compressors placed on the seabed, rather than on a conventional offshore platform.

This process saves vast amounts of steel that would otherwise be used for the platform. The structures are also energy efficient: as the seabed compressors are located closer to the wells, they operate efficiently with less power, and they use renewable clean energy from the Norwegian onshore grid.