OKEA awards Subsea Integration Alliance a contract for the Hasselmus field development located seven kilometres northwest of the Draugen platform, in the southern Norwegian Sea.The Hasselmus project is the first engineering, procurement, construction, and installation (EPCI) contract awarded under the scope of the frame agreement awarded in 2017.

The project work scope covers the EPCI of the subsea production systems (SPS) and subsea pipelines (SURF) for a single subsea well with direct tie-back to the Draugen production platform.

The development concept will benefit from the OneSubsea configurable vertical tree platform, which leverages a uniquely adaptable product architecture to address the dynamic conditions throughout the basin life cycle. It starts with a standard and robust core and adapts to well and basin requirements with numerous fit-for-purpose functional modules that address technical challenges without affecting the core performance. The platform enables flexibility in dynamic field conditions and contributes to reliable project delivery with budget certainty while minimising total cost of ownership for the life of the field.

The SPS scope also includes the installation of a subsea wellhead, subsea controls, completions installation system and OneSubsea’s innovative completion installation tooling—independent of rig selection. OneSubsea’s tooling platform eliminates the need to purchase tooling for projects, even for instances that have historically needed it. It employs a universal suspension tooling suite that includes a common set of tools, regardless of the downhole line configuration and type of tree being deployed, making smaller well-count projects more economically viable. And through the industry’s first rental-model enabled means of tubing hanger in wellhead installation and orientation, OneSubsea’s proprietary Tubing Hanger Orientation Spool (THOS) system decouples tooling design from rig-specific interfaces, removing historical interdependencies, enabling quicker first oil.

The SURF scope comprises approximately nine kilometres of pipe-in-pipe flowline with mechanically lined BuBi® pipe, a highly cost-efficient alternative to metallurgically clad pipe for corrosion-resistant applications, and associated structures. The flowline will be pulled into the Draugen platform via a j-tube and routed to the Hasselmus field at approximately 250 metres water depth.

Stuart Fitzgerald, CEO Subsea Integration Alliance LLC said: “This award to Subsea Integration Alliance supports our strategy for early engagement, full subsea system delivery, and our track record with OKEA. Working in partnership with OKEA has supported optimised solutions, early decision making and shortened delivery time, ultimately improving cost efficiency throughout the entire field lifecycle. We look forward to continuing to support this objective for the Hasselmus project.”

Steve Tate, Deputy CEO, Subsea Integration Alliance LLC said: “Delivering with certainty will be key to help OKEA start up production by 2023. The OneSubsea configurable vertical tree platform will be a key enabler to provide greater schedule assurance and reduce overall project risks by providing a standard design with plug-and-play capability. Coupled with our integrated project delivery model, we are committed to support OKEA’s objective.” 

Hasselmus is OKEA’s first operated field development project adding more than 4,400 boe/d of production at peak. Production start-up is estimated to be in Q4 2023.