Electromagnetic coupling for esp motor

Patent metadata

Field	Value
Publication number	US-2017194831-A1
Application number	US-201615392416-A
Country	US
Kind code	A1
Filing date	Dec 28, 2016
Priority date	Dec 30, 2015
Publication date	Jul 6, 2017
Grant date	—

Abstract

A pumping system deployable in a wellbore includes a primary driven component, a secondary driven component and a motor. The motor is filled with a motor lubricant and includes a stator, a primary rotor assembly configured for rotation within the stator and a primary shaft connected to the primary rotor assembly and to the primary driven component. The motor further includes an internal magnetic coupling assembly inside the stator. The internal magnetic coupling assembly includes a secondary rotor assembly and a secondary shaft. The secondary rotor assembly and the secondary shaft are isolated from the motor fluid.

First claim

What is claimed is:

1 . A motor for use in a pumping system, the motor comprising:
a stator; a primary rotor assembly configured for rotation within the stator; a primary shaft connected to the primary rotor assembly; and an internal magnetic coupling assembly inside the stator, wherein the internal magnetic coupling assembly comprises:
a secondary rotor assembly; and
a secondary shaft, connected to the secondary rotor assembly.

2 . The motor of claim 1 , wherein the internal magnetic coupling assembly further comprises:
an impermeable liner in contact with an interior surface of the stator; and a stand off connected to the liner.

3 . The motor of claim 2 , wherein the secondary rotor assembly is located within the liner.

4 . The motor of claim 2 , wherein the secondary shaft is located within the stand off.

5 . The motor of claim 2 , further comprising a cap connected to the liner.

6 . A pumping system deployable in a wellbore, the pumping system comprising:
a primary driven component; a secondary driven component; and a motor, wherein the motor is filled with a motor lubricant and wherein the motor comprises:
a stator;
a primary rotor assembly configured for rotation within the stator;
a primary shaft connected to the primary rotor assembly and to the primary driven component; and
an internal magnetic coupling assembly inside the stator, wherein the internal magnetic coupling assembly comprises:
a secondary rotor assembly;
a secondary shaft connected between the secondary rotor assembly and the secondary driven component; and
wherein the secondary rotor assembly and the secondary shaft are isolated from the motor fluid.

7 . The pumping system of claim 6 , wherein the primary driven component is a pump.

8 . The pumping system of claim 6 , wherein the secondary driven component is a compressor.

9 . The pumping system of claim 6 , further comprising a heat exchanger connected to the motor that reduces the temperature of the motor fluid.

10 . The pumping system of claim 6 , wherein the motor further comprises:
a head; a base; and a housing connected between the head and the base.

11 . The pumping system of claim 10 , wherein the internal magnetic coupling assembly comprises:
a liner in contact with an interior surface of the stator; a stand off connected between the liner and the base.

12 . The pumping system of claim 11 , wherein the secondary rotor assembly is located within the liner and wherein the secondary shaft is located within the stand off.

13 . A motor for use in a pumping system, the motor comprising:
a stator, wherein the stator contains a motor fluid; a primary rotor assembly configured for rotation within the stator, wherein the primary rotor assembly contains the motor fluid; and an internal magnetic coupling assembly inside the stator, wherein the internal magnetic coupling assembly comprises:
a secondary rotor assembly configured for rotation within the stator, wherein the secondary rotor assembly is isolated from the motor fluid.

14 . The motor of claim 13 further comprising a primary shaft connected to the primary rotor assembly.

15 . The motor of claim 14 further comprising a secondary shaft connected to the secondary rotor assembly.

16 . The motor of claim 15 , wherein the primary shaft is connected to a primary driven component and the secondary shaft is connected to a secondary driven component.

17 . The motor of claim 16 , wherein the internal magnetic coupling assembly further comprises:
a liner in contact with an interior surface of the stator; and a stand off connected to the liner.

18 . The motor of claim 17 , wherein the secondary rotor assembly is located within the liner.

19 . The motor of claim 18 , wherein the secondary shaft is located within the stand off.

20 . The motor of claim 19 , further comprising a cap connected to the liner.

Assignees

• Ge Oil & Gas Esp Inc

Inventors

• Marvel Robert Lee
• Garcia Rene Jose

Classifications

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• H02K9/10

  by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing · CPC title

• E21B43/128

  Adaptation of pump systems with down-hole electric drives · CPC title

• H02K1/22

  Rotating parts of the magnetic circuit · CPC title

• H02K5/132 Primary

  Submersible electric motors (H02K5/128 takes precedence) · CPC title