subsea facilities solution for deep water

Costain was contracted to create a subsea solution to allow a fast-track development, based on utilisation of an existing FPSO.

  • Service 1

Advisory and concept development


21 month

fast track schedule

Deep water

To support a development option utilising an existing FPSO, Costain was contracted to create a subsea facilities solution to allow first oil from a deep-water Norwegian development opportunity within 21 months, while allowing simultaneous drilling and subsea construction. The water depth precluded diving and the location demanded installation work restricted to the summer season.

Costain was responsible for development of the technical solution and also for the supporting cost estimates and schedules.


We created a development solution based on a hybrid of the established template solution for well drilling and hook up, with cluster wells for the early wells required to support the accelerated first oil date. The subsea facilities solution met the client’s fast-track requirements.

Contact and social

Oil & Gas

Gerard Shore, Sector director
0161 910 3444