Fmc Kongsberg Subsea As

Fsubsea As

Terje Hollingsæter

Vidar Sten-Halvorsen

Helge Grøtterud

Tommy Westberg

Erik Baggerud

Rune Fantoft

Christian Wik Høy

A subsea pump system includes a subsea centrifugal pump with a motor compartment and a process compartment. The subsea pump system further includes a liquid phase separator arranged downstream to the pump or downstream to at least one pump impeller. The liquid phase separator includes an inlet receiving the pressure boosted fluid, an outlet delivering a majority, or a minor part, of the pressure boosted fluid, and a liquid phase outlet, a liquid recirculation line, a flow mixer arranged on the inlet side of the pump, and a liquid lubricant line.

Subsea pump system with process lubricated bearings

A method for operating a pump includes establishing a pump limit characteristics diagram by mapping a first system parameter (P) as a function of a second system parameter (P) to identify a permissible operating region of the pump; for each first system parameter value (P), identifying a minimum allowable second system parameter value (P); monitoring the first system parameter (P) and identifying a minimum allowable second system parameter value (P) corresponding to the monitored first system parameter value (P); monitoring the second system parameter (P) and comparing the monitored second system parameter value (P) with the identified minimum allowable second system parameter value (P); and regulating a control valve that controls fluid flow through a return line connecting the suction and discharge sides of the pump so that the monitored second system parameter value (P) does not fall below the minimum allowable second system parameter value (P).

System for pumping a fluid and method for its operation

A method of operating a system () for pumping a fluid, which system comprises: a pump () for pumping the fluid; and a variable speed motor () for driving the pump (). The method comprises the steps of: identifying a first system parameter (PI); identifying a second system parameter (P) which is a function of the torque of the pump; setting a target value (P) for a first system parameter; monitoring the first system parameter (PI); establishing a target value (P) for the second system parameter based on the difference between the target value and the measured value of the first system parameter; monitoring the second system parameter; and regulating the rotational speed of the pump such that the difference between the monitored value and the target value of the second system parameter is minimized. A system for implementing the method is also disclosed.

The present invention regards a subsea sand handling system for limiting abrasion of specific subsea equipment (), comprising an inlet () connectable to a sand separation system () upstream of the specific equipment () and an outlet () connectable to a pipeline () downstream of the specific equipment (), wherein it comprises at least two collection vessels () and means for flushing () the sand out of at least one of the collection vessels (), and the vessels () and the means for flushing () the sand out of said vessels () are configured such that sand is flushed from one vessel () while sand is collected in the other vessel (). The present invention also regards a method for limiting abrasion of subsea rotating equipment.

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Lommedalen, Norway

Terje Hollingsæter