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| Offshore reserves——especially those discovered in deep water ——will be important in meeting future global oil demand .As oil companies step out into deeper waters, operators may discover that finding oil and gas is the easy part ——the real challenge lies in moving produced fluids from the reservoir to the processing facility .Multiphase subsea pumping represents a key development need .While multiphase pumping has been proven onshore ,operators have been hesitant to deploy this technology subsea due to its cost saving. This paper present the state of art in subsea multiphase boosting. This includes the subsea pump, subsea integration, power and control system, and intervention, installation. There are also several examples of subsea multiphase modules as production enabling equipment. Some experience and lessons will be addressed. Although multiphase pumps in most cases are used individually, they may be used in combination with other artificial lift technology like down hole pumps to offer integrated systems with premium reliability and economics. The last part of presentation will be related specifically to the prototype subsea multiphase pump designed by China University of Petroleum (beijing) , the motor-driven pump module is presented for vertical subsea installation on the sea bottom. Details of design like pump parameters, hydraulic parts(impellers, diffusers),cooling system ,bearings ,mixer will be presented. |
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| Keywords:multiphase pump;subsea;module;artificial lift;prototype |
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