Subsea Processing in general requires maintenance free reliable high-end instrumentation. In a subsea multi-phase separator, the operators control the process by monitoring the oil and water interface levels as well as the emulsion layer and sedimentation of sand using a nucleonic density profiler.  In addition to having the monitoring features, subsea instrumentation needs to go through comprehensive qualification tests in order to run continuously and without maintenance. The design life is 20 years. Together with the supplier, FMC developed a redundant and retrievable subsea nucleonic profiler for Tordis in 2007, the first subsea separation installation. In addition to current methods and technologies and what technology to be used in which cases, recent concept studies on radars, electromagnetism’s and ultrasonic’s will be addressed.

Roar Fjøsne works as a Senior Specialist Engineer at FMC Subsea Process Power, Process Control & Instrumentation. His main objective is to lead the R&D activities relevant for Subsea Process applications and to be the link between Customers and Suppliers.

Fjøsne holds a bachelor in cybernetics and electronics and has 20 years of experience within Automation including engineering, programming and commissioning (EPC) prior to the last 6 years with FMC Controls and Instrumentation.