Mokveld has been awarded the subsea anti-surge control valves contract for the Åsgard Subsea Gas Compression Project. Subsea gas compression technology can boost recovery rates and lifetimes of offshore gas fields. Operator Statoil awarded Aker Solutions the contract to supply a complete subsea compression system for Norway’s Åsgard field.
The project represents a quantum leap in subsea technology, and an important step in realising Statoil’s vision of a complete underwater plant. The development of large fast-acting subsea control valves was one of the technology gaps to be addressed. Mokveld has developed and successfully qualified an 8-inch / API 5.000 subsea axial control valve in close cooperation with well-known subsea integrators Oceaneering, FMC and Aker Solutions,. The qualification program included an API 6A PR2 test, endurance testing with 500.000 cycles and hyperbaric testing simulating seabed conditions. In addition, a valve was supplied to the Ormen Lange Subsea Compression Pilot extended life test project at Shell Nyhamna. Mokveld’s efforts have now been rewarded with a first project order for 3 off 8-inch / API 5.000 subsea control valves with electrical springs to open Oceaneering actuators.
The valves will be used in a quick-opening anti-surge control application operating at a water depth of 250 meters. Mokveld considers this as an important step into the subsea market. The qualified axial valve design is suitable for subsea anti-surge and separator control applications. The valve design can also be used for subsea HIPPS applications as per API RP17O.
