Subsea pressure booster

Abstract

Subsea turbomachine for boosting the pressure of petroleum fluid flow from subsea petroleum productions wells or systems, comprising an electric motor and a compressor or pump driven by the electric motor, a fluid inlet and a fluid outlet, distinctive that the turbomachine comprises a pressure housing common for the electric motor or stator, and compressor, pump or rotor; a magnetic gear inside the common pressure housing for operative connection between the motor or stator and compressor, pump or rotor; and a partition inside the common pressure housing, arranged so as to separate a motor or stator compartment from a compressor, pump or rotor compartment.

1 - 15 . (canceled) 
     
     
         16 . A subsea turbomachine for boosting pressure of a petroleum fluid flow from subsea petroleum production wells or systems, the subsea turbomachine comprising:
 an electric motor comprising a rotor and a stator, the rotor and the stator being disposed in a motor compartment;   a pump or compressor, disposed in a pump or compressor compartment;   a petroleum fluid inlet to and a petroleum fluid outlet from the pump or compressor compartment;   a common pressure housing for the motor compartment and the compressor or pump compartment;   a magnetic gear inside the common pressure housing for operative connection between the electric motor and the compressor or the pump;   an electric motor shaft and one pump or compressor shaft;   wherein an outer ring of the magnetic gear is connected to the electric motor shaft and an inner ring of the magnetic gear is connected to the one pump or compressor shaft, or opposite;   wherein the electric motor shaft and the one pump or compressor shaft are suspended in bearings; and   a partition inside the common pressure housing, arranged between the inner and outer magnetic gear rings so as to separate the motor compartment hermetically from the pump or compressor compartment, wherein the subsea turbomachine has no external barrier fluid system or supply.   
     
     
         17 . The subsea turbomachine according to  claim 16 , further comprising a pressure balancing device comprising an arrangement between an inlet side of the pump or compressor compartment and the motor compartment. 
     
     
         18 . The subsea turbomachine according to  claim 16 , further comprising a pressure balancing device comprising two contra valves being controlled by measurement of pressure differential between the motor compartment and the pump or compressor compartment. 
     
     
         19 . The subsea turbomachine according to  claim 16 , further comprising a liquid filled motor compartment. 
     
     
         20 . The subsea turbomachine according to  claim 16 , further comprising a gas filled motor compartment.