Omnirise hydromag “variable speed magnetic coupling system for subsea pumps”

A boosting system for subsea use comprising:

• an enclosed shell divided into a sealed motor compartment and a booster unit compartment by a pressure containment member;
• the motor compartment filled with liquid and containing an electric motor having a shaft, a hydrodynamic coupling, and a driver portion of a magnetic coupling;
• the booster unit compartment containing a booster unit having a shaft operably connected to a follower portion of the magnetic coupling, the magnetic coupling follower portion being separated from the driver portion by the pressure containment member;
• and
• a pressure compensating device for balancing the pressure in the motor compartment with an external subsea pressure.

A subsea pressure booster system comprising:

• an electric motor having a motor shaft;
• an impeller arranged on a first end of the motor shaft;
• a turbine;
• a stub shaft;
• a magnetic coupling driver portion,
• wherein the turbine is arranged on a first end of the stub shaft, facing the impeller but with a gap between the stub shaft and motor shaft, the arrangement of the turbine and impeller defining a hydrodynamic coupling, and the magnetic coupling driver portion at a second end of the stub shaft;
• an actuator with variable speed and torque control of the hydrodynamic coupling between the motor shaft and the stub shaft;
• a hermetically sealed container containing the electric motor, motor shaft, hydrodynamic coupling, stub shaft and magnetic coupling driver portion;
• a liquid fluid filling the hermetically sealed container, the fluid being a combined hydrodynamic coupling fluid, coolant and lubricant;
• a pressure compensator, arranged in a liquid fluid flow network system;
• the subsea pressure booster system further comprising:
• a magnetic coupling follower portion;
• a pressure booster having a pressure booster shaft;
• a booster compartment having a pressure containment member,
• wherein the magnetic coupling follower portion is facing the magnetic coupling driver portion, the pressure containment member is arranged between the magnetic coupling driver and follower portions, the booster compartment containing the magnetic coupling follower portion, the pressure booster shaft and the pressure booster.

A subsea pressure booster system comprising:

• an electric motor having a motor shaft;
• an impeller arranged on a first end of the motor shaft;
• a turbine;
• a stub shaft;
• a magnetic coupling driver portion,
• wherein the turbine is arranged on a first end of the stub shaft, facing the impeller but with a gap between the stub shaft and motor shaft, the arrangement of the turbine and impeller defining a hydrodynamic coupling, and the magnetic coupling driver portion on an opposite end of the stub shaft;
• an actuator, wherein the actuator comprises guide vanes with controllable position, the position of the guide vanes controls the speed and torque of the hydrodynamic coupling;
• a motor compartment containing the electric motor, motor shaft, impeller, turbine, stub shaft and magnetic coupling driver portion,
• a liquid fluid filling the motor compartment, the fluid being a combined hydrodynamic coupling fluid, coolant and lubricant,
• a pressure compensator, arranged in a liquid fluid flow network;
• the subsea pressure booster system further comprising:
• a magnetic coupling follower portion;
• a pressure booster having a pressure booster shaft;
• and
• a booster compartment having pressure containment member,
• wherein the magnetic coupling follower portion is facing the magnetic coupling driver portion, the pressure containment member is arranged between the magnetic coupling driver and follower portions, the booster compartment containing the magnetic coupling follower portion, the pressure booster shaft and the pressure booster, and whereby the actuator controls the pressure booster speed in a range from below the motor speed to twice the motor speed.

A subsea pressure booster system comprising:

• an electric motor having a motor shaft;
• an impeller arranged on a first end of the motor shaft;
• a turbine;
• a stub shaft;
• a magnetic coupling driver portion,
• wherein the turbine is arranged on a first end of the stub shaft, facing the impeller but with a gap between the stub shaft and motor shaft, the arrangement of the turbine and impeller defining a hydrodynamic coupling, and the magnetic coupling driver portion at an opposite end of the stub shaft;
• an actuator comprising fixed guide vanes;
• a motor compartment containing the electric motor, motor shaft, impeller, turbine, stub shaft and magnetic coupling driver portion;
• a liquid fluid filling the motor compartment, the liquid fluid being a combined hydrodynamic coupling fluid, coolant and lubricant;
• a pressure compensator, arranged in a liquid fluid flow network system;
• the subsea pressure booster system further comprising:
• a magnetic coupling follower portion,
• a pressure booster having a pressure booster shaft;
• and
• a booster compartment having a pressure containment member,
• wherein the magnetic coupling follower portion is facing the magnetic coupling driver portion, the pressure containment member is arranged between the magnetic coupling driver and follower portions, the booster compartment contains the magnetic coupling follower portion, the pressure booster shaft and the pressure booster.