DeepOcean has finished subsea construction and tie-in work at the Teal West development for Anasuria, connecting the field to the existing Anasuria FPSO in the UK Continental Shelf's Central North Sea. The company used remotely operated vehicles and specialized tooling for the connection work, replacing the diver intervention such tasks have traditionally required.
Teal West is being developed as a subsea tieback to the Anasuria FPSO. DeepOcean's scope covered installing a flexible production riser and flowline, plus an umbilical connecting the FPSO to the Teal West subsea Christmas tree, the valve assembly on the seabed that controls flow from the well. The scope also covered protecting the flowline and umbilical, and commissioning the newly installed infrastructure.
The field development comprises two production wells and a water injection well. One production well will initially connect to the Anasuria FPSO through about three kilometers of subsea flowlines.
The Anasuria FPSO sits about 180 kilometers east of Aberdeen, in about 90 meters of water.
Diverless connections
DeepOcean used a proprietary tie-in tool to make diverless connections at high-pressure flanges, linking pipes and valves with subsea robotics instead of divers.
Offshore work ran in two phases. Subsea construction and tie-in came first. Commissioning followed, carried out by a second offshore construction vessel from DeepOcean's chartered fleet.
