Cathelco has won orders to supply hull corrosion protection systems for three FPSOs. Two of the systems are being supplied to MODEC, while the third will be installed by Sembcorp Marine’s Jurong yard in Singapore.
The FPSO Cidade de Campos dos Goyatacazes is being built by MODEC for deployment off Brazil by Petronas. It will be capable of processing 150,000 bopd, 176 MMcf/d, and have a storage capacity of 1.6 MMbbl. Due for delivery in late 2017, it will be positioned in the Campos basin, 125km from Macae.
To protect the vessel against corrosion, Cathelco will be supplying an impressed current cathodic protection (ICCP) system to safeguard the hull over an operational life of 20 years.
Cathelco has experience in the design of ICCP systems for FPSOs which are generally on station for a prolonged period of time without drydocking.
The FPSO Cidade de Campos dos Goyatacazes will be installed with 1000 amp forward system and a 1200amp aft ICCP system, each consisting of six hull mounted disc anodes and two reference electrodes.
In operation, the reference electrodes measure the electrical potential at the hull/seawater interface and sends a signal to the control panel which raises or lowers the output to the anodes accordingly. In this way, as paint loss increases over time, the ICCP system continues to provide the optimum level of protection.
The vessel will be installed with Quantum control panels which provide comprehensive data about the performance of the system. The whole system (forward and aft) can be monitored from the aft control panel. This enables data to be downloaded to a USB stick and sent to Cathelco for detailed analysis.
Cathelco is supplying another ICCP system for the FPSO Catcher which is being built by the IHI Corp’s yard at Aichi, Japan under the supervision of MODEC who are working on behalf of BW Offshore.
After the integration of the topside modules and completion in Singapore, the FPSO will be deployed in Premier Oil’s Catcher field in the North Sea. It will be capable of processing up to 60,000 bopd and have a storage capacity of 650,000 bbl.
The FPSO Catcher will be installed with forward and aft ICCP systems, each 400 amps and consisting of two hull mounted disc anodes and two reference electrodes. The anodes and reference electrodes are designed to be diver changeable, enabling them to be replaced at sea, if necessary, without the need for drydocking. The Quantum control panels provide connectivity between the forward and aft units, enabling the whole system to be monitored from the aft location.
A third order has come from Sembcorp Marine’s Jurong yard in Singapore where a shuttle tanker is to be converted into FPSO Libra.
Scheduled for completion in 2016, the FPSO will have the capacity to produce 50,000 bbl and 4 MMcm/d. It is expected to be chartered by Petrobras for use in the Libra field in Brazil’s Santos basin.
Cathelco will be providing a 400 amp forward and a 600 amp aft ICCP system for the FPSO Libra, the former consisting of two anodes and two reference electrodes, while the more powerful aft system will have four anodes and two reference electrodes.
Image: ICCP control panel/Cathelco
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