Framo Engineering As

Onesubsea IP UK Limited

Atle K Berle

Stig Kaare Kanstad

Nils-Egil Kangas

Lars Seim

Åsmund Valland

Asmund Valland

Stig Kåre Kanstad

Raymond Rogne

A subsea oil filtration system is described that forms a closed circuit with and is mounted on or connected to a subsea rotating machine. According to some embodiments, the oil filtration system enables the removal of dirt and/or water that has entered the barrier fluid/oil system whether it comes from the Hydraulic Pressure Unit (HPU), from the umbilical or from other parts of the oil contained lubrication and/or barrier fluid systems.

Oil filtration system for subsea oil-filled machines

A bearing system for a rotating turret mounted on a vessel includes upper radial and axial bearings placed on a stiff bearing support ring. The bearing support ring is isolated from deflections in the vessel's caisson. Through the isolation, the radial and axial bearings are less affected by deflection of the vessel for example due to waves. The bearing support ring is supported vertically by a system of hydraulic cylinders serviced by multiple hydraulic systems for redundancy. The bearing support ring alternatively can be supported by an articulated steel structure.

Bearing support system and method for a turret on a vessel

There is disclosed a subsea cooler for the cooling of a fluid flowing in a subsea flow line. The subsea cooler comprises an inlet and an outlet which are connectable to the subsea flow line and at least two cooling sections arranged in fluid communication with the inlet and the outlet of the subsea cooler. Each cooling section includes a plurality of cooling pipes which are configured such that they exchange heat energy with the surrounding sea water when the subsea cooler is in use. The subsea cooler is further provided with valve means such that the flow of fluid through the cooling sections may be regulated individually. There is also disclosed a method for removal of accumulated wax, hydrates and sand and debris which has accumulated in the subsea cooler wherein separate cooling section are shut off whereby the temperature of the fluid flowing through the subsea cooler is increased thereby melting the wax and hydrates, and whereby the speed of the fluid flow through the subsea cooler is increased thereby jetting out sand and debris.

Subsea cooler and method for cleaning the subsea cooler

There is provided a subsea system for increasing pressure and/or flow rate in a flow line, the subsea system being arranged in fluid communication with said flow line which receives fluid from at least one fluid source. The subsea system comprises at least one compressor or pump and at least one subsea cooler which is arranged in the flow line in series with the at least one compressor. The subsea system further comprises a recirculation line which is configured such that at least a portion of the fluid flowing in the flow line downstream the at least one compressor and the at least one subsea cooler may be recirculated back to the flow line upstream the at least one compressor and the at least one subsea cooler such that the recirculating line can be used for capacity regulation of the at least one compressor and cleaning of the at least one subsea cooler. There is also provided a method for the removal of wax and/or hydrate and/or sand and debris which has accumulated in at least one subsea cooler of a subsea system.

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Ulset, Norway

Atle K Berle