Conventional axial flux motors typically include multiple rotors and stators resulting in a larger and heavier motor. Additionally, conventional axial flux motors include a housing to protect the rotors and stators, but the housing is often difficult to seal from the environment leading to risks of contaminants (e.g., dirt, water) infiltrating the motor and causing failure over time. The present invention overcomes these limitations by disclosing an axial flux motor with a single rotor and two stators. The use of a single rotor reduces the size and weight of the motor. An inboard housing and an outboard housing mechanically support the two stators and are joined together to define an interior cavity. A ring seal is disposed between the two housings to ensure the interior cavity is sealed. Additionally, the two stators may actuate multiple degrees of freedom (DOF) including the rotation of a wheel and actuation of a suspension.

Conventional axial flux motors typically include multiple rotors and stators resulting in a larger and heavier motor. Additionally, conventional axial flux motors include a housing to protect the rotors and stators, but the housing is often difficult to seal from the environment leading to risks of contaminants (e.g., dirt, water) infiltrating the motor and causing failure over time. The present invention overcomes these limitations by disclosing an axial flux motor with a single rotor and two stators. The use of a single rotor reduces the size and weight of the motor. An inboard housing and an outboard housing mechanically support the two stators and are joined together to define an interior cavity. A ring seal is disposed between the two housings to ensure the interior cavity is sealed. Additionally, the two stators may actuate multiple degrees of freedom (DOF) including the rotation of a wheel and actuation of a suspension.

A pump assembly includes an electric motor including a rotor having a shaft extending from the electric motor, the shaft including a substantially single unit of material and having an end rotationally couplable to an impeller that when the shaft is rotatably displaced by the electric motor, the impeller displaces a fluid to create a jet of fluid. An enclosure having a cavity arranged between a front surface and a back surface of the enclosure, and the electric motor being arrangeable in the cavity of the enclosure. The enclosure protecting the electric motor arranged in the enclosure from a fluid, and a dielectric fluid is containable in the cavity of the enclosure to immerse the electric motor in the dielectric fluid for preventing corrosion of the electric motor from the fluid.

A pump assembly includes an electric motor including a rotor having a shaft extending from the electric motor, the shaft including a substantially single unit of material and having an end rotationally couplable to an impeller that when the shaft is rotatably displaced by the electric motor, the impeller displaces a fluid to create a jet of fluid. An enclosure having a cavity arranged between a front surface and a back surface of the enclosure, and the electric motor being arrangeable in the cavity of the enclosure. The enclosure protecting the electric motor arranged in the enclosure from a fluid, and a dielectric fluid is containable in the cavity of the enclosure to immerse the electric motor in the dielectric fluid for preventing corrosion of the electric motor from the fluid.

An electric submersible pump used to pump fluids inside a borehole during operation is described. The electric submersible pump and its motor can be powered using an inductive power coupling. The electric submersible pump comprises a sealed extension that houses a pickup inductive coil assembly that is electrically coupled to a power source at a surface of the borehole. Power runs through the primary inductive coil assembly and the primary inductive coil is positioned relative to the pickup inductive coil assembly such that the electrical current flowing in the primary inductive coil assembly from the power source and through the power cable induces a voltage in the pickup inductive coil assembly.

An electric submersible pump used to pump fluids inside a borehole during operation is described. The electric submersible pump and its motor can be powered using an inductive power coupling. The electric submersible pump comprises a sealed extension that houses a pickup inductive coil assembly that is electrically coupled to a power source at a surface of the borehole. Power runs through the primary inductive coil assembly and the primary inductive coil is positioned relative to the pickup inductive coil assembly such that the electrical current flowing in the primary inductive coil assembly from the power source and through the power cable induces a voltage in the pickup inductive coil assembly.

A mobile service rig includes an onboard rechargeable electric power storage system (e.g., a battery, supercapacitor, etc.) for powering the rig's hoist and drive wheels. Under battery power, the rig travels overland to service wellbores at various wellsites. Once at a wellsite, a submerged pump assembly at the site is de-energized, and the hoist proceeds to remove and reinstall tubing and the pump assembly. While the electric pump assembly is de-energized, the rig's onboard rechargeable electric power storage system taps into the electric power source normally used for the electric pump assembly. The electric power source of the electric pump assembly recharges the rechargeable electric power storage system while the rig is servicing the well. When the hoist lowers the tubing back down into the wellbore, the energy generated by that operation is recovered and used for replenishing the rig's rechargeable electric power storage system.

A mobile service rig includes an onboard rechargeable electric power storage system (e.g., a battery, supercapacitor, etc.) for powering the rig's hoist and drive wheels. Under battery power, the rig travels overland to service wellbores at various wellsites. Once at a wellsite, a submerged pump assembly at the site is de-energized, and the hoist proceeds to remove and reinstall tubing and the pump assembly. While the electric pump assembly is de-energized, the rig's onboard rechargeable electric power storage system taps into the electric power source normally used for the electric pump assembly. The electric power source of the electric pump assembly recharges the rechargeable electric power storage system while the rig is servicing the well. When the hoist lowers the tubing back down into the wellbore, the energy generated by that operation is recovered and used for replenishing the rig's rechargeable electric power storage system.

A subsea fluid processing system includes an electric motor that rotates a shaft on which impellers are fixedly mounted. Diffusors are static and fixed to the pump housing. The electric motor includes a rotor surrounding the shaft and a stator that is filled with a dielectric stator fluid. The stator is sealed or “canned.” The inner surface of the stator which faces the rotor is canned with a canning non-metallic material. The motor, as well as bearings for the rotating shaft are lubricated and cooled with a fluid that in some cases is taken from the process fluid and some alternative source. Alternative sources include: MEG, methanol, treated seawater and untreated seawater.

A subsea fluid processing system includes an electric motor that rotates a shaft on which impellers are fixedly mounted. Diffusors are static and fixed to the pump housing. The electric motor includes a rotor surrounding the shaft and a stator that is filled with a dielectric stator fluid. The stator is sealed or “canned.” The inner surface of the stator which faces the rotor is canned with a canning non-metallic material. The motor, as well as bearings for the rotating shaft are lubricated and cooled with a fluid that in some cases is taken from the process fluid and some alternative source. Alternative sources include: MEG, methanol, treated seawater and untreated seawater.