flexibility, and cost savings. Reductions in umbilical size, can be of true benefit, allowing the installation to be carried out using a reel and eliminating the requirement for big carousel vessels. Another application is the use of electric actuators in subsea process valve applications. The operability features, combined with the higher reliability makes this technology a preferred solution for designing process valves in applications such as separator level control. Several operators are looking at this, as a process valve is one of the enablers for Subsea processing systems. Preparing for installation
Field Components The system is monitored and controlled by the master control station (MCS) on the topsides. An electric power and communication unit (EPCU) is connected with its corresponding subsea located PRCM while the main umbilical terminates on the topsides umbilical termination unit.
The electric subsea control module (ESCM) manages the control of the electrically actuated valves.
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The power regulation and communications module (PRCM) regulates the voltage from 3000V DC transmission to 300V DC. It sends the power and communication to the ESCMs. Conventionally, the industry uses copper wire to carry the power, with the communications either via a separate wire or the signals are superimposed over the electrical power. This is true on K5F, where a single line would connect to each of the four potential trees. In larger
developments with longer offsets and high instrumentation requirements, however, the greater bandwidth demanded for can be satisfied by the use of fibre optics. Using an open architecture with fibre optics would give a dedicated control not only to individual trees but to individual subsea components. With the ethernet network, each component can be selected by its own IP address and new components can be added easily. First application of this fibre optic technology (CAMLAN) is for a project in the Mediterranean, in operation since June 2008
valves as well as electric The CameronDC trees contain the electric actuated actuated chemical injection valves and production choke production and annulus