Patent ID: 11952874
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC E  F | IPC E  F

Claim 0:
1. A system for producing hydrocarbons from a subterranean well, the system including:
an electrical submersible pump assembly with a motor, where the motor has: a motor housing, the motor housing being an elongated member;
a stator located within the motor housing, the stator having a stator body with an interior cavity extending along a central axis of the stator;
a rotor assembly located within the interior cavity of the stator, the rotor assembly including a rotor shaft, a rotor member, and an intermediate rotor bearing assembly, where the rotor member and the intermediate rotor bearing assembly circumscribe the rotor shaft, and where the rotor shaft is an elongated member that extends along the central axis of the stator;
a liner located along an interior surface of the interior cavity, the liner being a thin walled member that is secured to the motor housing and defines a barrier to fluid flow between the stator and rotor assembly;
a rotor cavity located within an inner bore of the liner;
a membrane located within the liner;
a hydrophobic fluid circulating within the rotor cavity;
magnetic particles within the hydrophobic fluid that are encapsulated within a polymer for preventing agglomeration of the particles; and
wherein the stator is disposed in a hermetically sealed space formed by the liner and a dielectric fluid is disposed inside the hermetically sealed space that is different from the hydrophobic fluid.