S2M, an SKF Group Company, has signed a two-year contract to equip subsea compression trains with SKF magnetic bearings and their associated electronics for the Åsgard gas field in the Norwegian Sea. The contract is with MAN Diesel & Turbo, Aker Solutions Norway and Statoil.
A first of its kind, the Åsgard subsea compression project will involve placing two compressors on the seabed to maintain discharge pressure in the pipeline and compensate for the falling suction pressure as the reservoir is depleted over the next few years, thereby boosting the gas flow.
MAN Diesel & Turbo will supply four hermetically sealed compressor units, of which two will be on the seabed, while one will be retained onshore in reserve, with the fourth used for testing. SKF magnetic bearings were selected for their capability to operate in these severe conditions with very high reliability and with remote monitoring. They will maintain the motor compressor shaft systems in position, and are oil free, frictionless and virtually maintenance free. These features are vital in compressors installed at a depth of between 200 and 300 metres as they are too deep for divers and are accessible only by remotely operated vehicles.
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