Abstract: System for control of a subsea located compressor fluidly connected to receive an inlet flow of gas through an inlet line, said flow may include liquid in an amount that may vary. The control system comprises a sensor means for measuring and determining the liquid droplet size distribution and liquid volume fraction, operatively arranged to the inlet line, and a control means operatively connected to the sensor means for operation of the control means based on input from the sensor means. Method for control of a subsea located compressor.

Abstract: The invention relates to a monitoring system and method for accumulator banks including at least two pressure accumulators, the accumulator bank is coupled to a device and being adapted to provide a pressurized fluid into the device at pressure reductions in said device. The monitoring system comprises at least one sensor for detecting a chosen parameter in the accumulator bank at chosen intervals of time, and a recording unit for recoding the sampled measured parameters, a storage device for storing predetermined characteristic information related to the pressure development in the accumulator bank during pressure reductions at the device and representing different numbers of active accumulators in the accumulator bank, and calculation means for comparing the recorded measured parameters with the stored characteristic information, and determining from this comparison the number of active accumulators in the accumulator bank.

Abstract: The present invention relates to a system and method for monitoring subsea equipment performance and for providing early warning for equipment maintenance, comprising at least one sensor coupled to said equipment and arranged to measure at least one performance indicator value and a calculation unit for sampling the measured indicator values at a chosen rate, and from the sampled data estimating a likely future development of the sampled value and estimating the time for the passing of a chosen threshold value, the threshold value being a critical value requiring repair of replacements of said equipment, the system being adapted to provide a signal indicating the calculated time of repair/replacement.