STAVANGER, Norway -- Roxar has secured a patent for its subsea multiphase meter's subsea retrievable canister, which houses the meter's electronics and flow computing modules.
The patented canister underwent qualification testing with Exxon Mobil Corp., with the first two meters installed on the Kizomba B field offshore Angola, in 2004.
Canister benefits include low and cost-effective maintenance with limited subsea intervention requirements, high flow-measurement availability, 100% redundancy on all electronics, easy installation, and a simplified subsea structure design, Roxar says.
The canister can be retrieved through a standard remotely operated underwater vehicle.
"Today's patent is a tribute to the design philosophy behind the Roxar subsea multiphase meter – keep it simple, and limit the equipment that needs to be installed subsea; make sure that that any components that fail do not impact production; and commit to a flexible and lightweight design that can be incorporated with existing subsea modules," says Sandy Esslemont, Roxar CEO.
More than 80 Roxar subsea multiphase meters of this design have been ordered worldwide, including the two meters installed by ExxonMobil on Kizomba B, several meters installed by Total on the Rosa oil field also offshore Angola, and meters being installed by Cameron on the deepwater Akpo field offshore Nigeria.