The Subsea Integration Alliance of Subsea 7 and OneSubsea will be responsible for engineering, procurement, construction, and installation of the subsea production systems and subsea pipelines (SURF) for a single subsea well, tied back to the platform to the southeast.
The SURF scope covers around 9 km (5.6 mi) of pipe-in-pipe flowline and associated structures in water depths of around 250 m (820 ft).
Project management and engineering has started at Subsea 7’s offices in Stavanger. Fabrication of the pipelines will take place at its spoolbase at Vigra, Norway, with offshore operations to follow during 2022 and 2023.
Kyrre Fatval, project Director Hasselmus Development at OKEA, said: “Working in partnership with Subsea Integration Alliance supports an optimized project solution, early decision making and shortened delivery time, ultimately improving cost efficiency throughout the entire field lifecycle.”
Aker Solutions will perform modifications on the platform so that it can process of gas from Hasselmus. The company, which undertook the FEED for the project, has started work on the engineering, procurement, construction, installation and commissioning award for new equipment, and expects to complete this program by the end of 2023.
The scope will include hookup of new riser, a new inlet arrangement with electrical heater, new inlet scrubber, valve arrangement, a revamp of gas export compressors, and modifications to the condensate train.
Aker Solutions’ yard in Egersund will pre-fabricate the new systems, while the company’s offices in Trondheim and Kristiansund will handle engineering, procurement, and project management.
Fatval said: “The job will be executed within the existing modification frame agreement between Aker Solutions and OKEA.
“Topside scope is planned to be executed with a minimum of interruption of the ongoing production on Draugen where safe and efficient revamp of the compressor train in the planned maintenance shut-down in April 2023 is a key success factor.”