Mokveld awarded valves contract for Statoil gas compression project
THE NETHERLANDS -- Mokveld has been awarded the subsea anti-surge control valves for Statoil’s Åsgard subsea gas compression project.
Aker Solutions was awarded the contract by operator Statoil to supply a complete subsea compression system for Norway’s Åsgard field. The project represents a major development in subsea technology, and an important step in realising
Statoil’s vision of a complete underwater plant.
One of the technology gaps to be addressed was the development of large, fast-acting subsea control valves. Because of its experience with axial flow design in topside severe service control applications, Mokveld was asked to investigate the axial flow concept as the basis for a subsea control valve.
In cooperation with subsea integrators Oceaneering, FMC and Aker Solutions, Mokveld has developed and successfully qualified an 8-in., API 5000 subsea axial control valve. The qualification program included an API 6A PR2 test, endurance testing with 500,000 cycles and hyperbaric testing simulating seabed conditions. A valve was also supplied to the Ormen Lange subsea compression pilot extended life test project at Shell Nyhamna.
Mokveld’s has been awarded a first project order for 3 off 8-in., API 5000 subsea control valves with electrical spring to open Oceaneering actuators. The valves will be used in a quick-opening anti-surge control application. On surface and topside projects, this application is considered challenging, and these valves will be operating at a water depth of 250 m.
The qualified axial valve design is suitable for subsea anti-surge and separator control applications. In addition, the valve design can be used for subsea HIPPS applications as per API RP17O.