Motorized pump

Abstract

A motorized pump including a motor and a pump around the motor. The pump rotor is integrated with the motor rotor, wherein the pump rotor has vanes. The motorized pump may be employed as an electrical submersible pump (ESP) in a wellbore.

What is claimed is: 
     
         1 . A motorized pump comprising:
 a motor comprising a motor rotor and a motor stator, the motor stator comprising windings; and   a pump surrounding the motor, the pump comprising a pump rotor integrated with the motor rotor, wherein the pump rotor comprises vanes.   
     
     
         2 . The motorized pump of  claim 1 , wherein the motor comprises an external rotor motor, and wherein the pump comprises a pump stator having vanes on an inside diameter to engage with the pump rotor vanes to pump fluids. 
     
     
         3 . The motorized pump of  claim 2 , wherein the motor rotor and pump rotor are configured to rotate together, the pump rotor to rotate within the pump stator. 
     
     
         4 . The motorized pump of  claim 2 , wherein the motorized pump is an electrical submersible pump (ESP) motor and pump and does not comprise an ESP motor protector, and wherein the motorized pump comprises radially, from inside to outside, the motor stator, the motor rotor and the pump rotor, the pump stator, and a housing. 
     
     
         5 . The motorized pump of  claim 1 , wherein the pump radially encloses the motor, wherein the motorized pump does not comprise a shaft coupling the motor to the pump, wherein an outside diameter (OD) of the motor rotor is constructed with or integrated with the pump rotor, and wherein the pump does not comprise a diffuser. 
     
     
         6 . The motorized pump of  claim 1 , wherein the motor rotor comprises permanent magnets and steel laminations. 
     
     
         7 . The motorized pump of  claim 6 , wherein the steel laminations have the permanent magnets mounted on an inside diameter (ID) portion or embedded within to engage electromagnetically with the motor stator. 
     
     
         8 . The motorized pump of  claim 1 , wherein the motor rotor is an induction type comprising steel laminations with copper bars and end ring. 
     
     
         9 . The motorized pump of  claim 1 , wherein the motor stator is at a center of the motorized pump, and wherein permanent magnets of the motor rotor and the vanes of the pump rotor are both on laminations of the motor rotor. 
     
     
         10 . The motorized pump of  claim 1 , wherein the motorized pump does not comprise an outer housing. 
     
     
         11 . A motorized pump comprising:
 a motor comprising a motor rotor and a motor stator, the motor stator comprising windings; and   a pump radially enclosing the motor, the pump comprising a pump rotor integrated with the motor rotor, wherein the pump rotor comprises vanes.   
     
     
         12 . The motorized pump of  claim 11 , comprising permanent magnets disposed on the motor rotor, wherein radially, from inside to outside, the motorized pump comprises (a) the motor stator, (b) the motor rotor and the pump rotor, (c) a pump stator, and (d) a housing, and wherein the pump and motor are contained within the housing. 
     
     
         13 . The motorized pump of  claim 11 , wherein the motor comprises an external rotor motor, wherein the motor rotor comprises permanent magnets and radially encloses the motor stator, and wherein the pump comprises a pump stator comprising vanes on an inside diameter to engage with the pump rotor vanes to pump fluids. 
     
     
         14 . The motorized pump of  claim 11 , wherein the motor comprises an induction motor or a permanent magnet motor, wherein the motor stator comprises laminations and windings, and wherein the motorized pump is configured for deployment downhole riglessly with a power cable inside tubing. 
     
     
         15 . The motorized pump of  claim 11 , wherein the motor rotor and pump rotor share a same rotor, wherein the pump comprises a pump stator with vanes, wherein pump rotor vanes are machined, and wherein the motorized pump does not comprise a shaft coupling the pump to the motor. 
     
     
         16 . The motorized pump of  claim 11 , wherein the motorized pump does not comprise an outer housing. 
     
     
         17 . The motorized pump of  claim 11 , wherein the motor stator is at a radial center of the motorized pump, the motor rotor comprising a stack of steel laminations compressed together, and within these laminations, slots cut for magnetic wire windings. 
     
     
         18 . The motorized pump of  claim 11 , wherein the motor rotor is an induction motor comprising copper bars inside a stack of steel laminations and short circuited with end rings. 
     
     
         19 . A method of operating an electrical submersible pump (ESP) comprising a motorized pump, the method comprising pumping, by the motorized pump, fluid from a wellbore, wherein the motorized pump comprises a motor and a pump that radially encloses the motor, wherein the motor comprises a motor rotor and a motor stator, and wherein the pump comprises a pump rotor comprising vanes integrated with the motor rotor. 
     
     
         20 . The method of  claim 19 , comprising lowering the motorized pump into the wellbore, wherein the motor stator comprises windings. 
     
     
         21 . The method of  claim 19 , wherein the pumping comprises receiving the fluid at an inlet suction of the motorized pump from perforations in a casing of the wellbore, wherein the fluid comprises hydrocarbon, and wherein the motorized pump comprises a radial bearing disposed axially between two adjacent stages. 
     
     
         22 . The method of  claim 19 , wherein the pumping comprises lifting the fluid from the wellbore and discharging the fluid through a production conduit to an Earth surface, wherein the fluid comprises oil and gas, and wherein the motorized pump does not comprise a motor protector section. 
     
     
         23 . The method of  claim 19 , wherein an outer diameter or external surface of the motor rotor comprises vanes giving an integral motor rotor and pump rotor, wherein the pumping comprises magnetic coupling between the motor and pump to move pumped fluids, wherein as the motor rotor and the pump rotor rotate, the vanes engage hydraulically with corresponding vanes on a stationary pump stator to move the pumped fluids, wherein the pumped fluids comprise production fluids. 
     
     
         24 . The method of  claim 19 , wherein the motor stator comprises laminations, slots, and magnet wires with windings of the magnet wires such that electromagnetic fields project outward for engagement with the motor rotor comprising an external motor rotor. 
     
     
         25 . The method of  claim 19 , wherein the pump comprises a pump stator comprising vanes, wherein the pump stator vanes and the pump rotor vanes are radially outside of the motor stator, wherein the motor rotor comprises permanent magnets and steel laminations, and wherein the pumping comprises electromagnetic interaction between the motor stator magnetic fields and the permanent magnets generating torque and rotation. 
     
     
         26 . The motorized pump of  claim 19 , wherein the motor rotor comprises a squirrel cage induction motor.