Pressure exchange system with motor system

Patent metadata

Field	Value
Publication number	US-10167710-B2
Application number	US-201514684118-A
Country	US
Kind code	B2
Filing date	Apr 10, 2015
Priority date	Apr 10, 2014
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

A system including a rotary isobaric pressure exchanger (IPX) configured to exchange pressures between a first fluid and a second fluid, and a motor system coupled to the hydraulic energy transfer system and configured to power the hydraulic energy transfer system.

First claim

The invention claimed is:

1. A frac system, comprising:
a hydraulic energy transfer system configured to exchange pressures between a first fluid and a second fluid, the hydraulic energy transfer system comprises:
a housing;
a rotor within the housing and configured to exchange the pressures between the first fluid and the second fluid;
a sleeve within the housing wherein the rotor is configured to rotate within the sleeve; and

an electric motor system coupled to the hydraulic energy transfer system and configured to rotate the rotor, the electric motor system comprises:
a first magnet within the sleeve; and
a second magnet within the rotor, wherein interaction between the first magnet and the second magnet are configured to rotate the rotor.

2. The system of claim 1 , wherein the first fluid is a substantially particulate free fluid and the second fluid is a particulate laden fluid.

3. The system of claim 1 , wherein the hydraulic energy transfer system comprises a rotary isobaric pressure exchanger (IPX).

4. The system of claim 1 , wherein the first magnet comprises a permanent magnet or an electromagnet.

5. The system of claim 1 , wherein the second magnet comprises a permanent magnet or an electromagnet.

6. The system of claim 1 , comprising a controller with one or more modes of operation configured to control the electric motor system.

7. The system of claim 6 , wherein the one or more modes of operation comprise at least one of a startup mode, a speed control mode, a continuous power mode, or a periodic power mode.

8. The system of claim 6 , comprising a sensor configured to detect whether the hydraulic energy transfer system is rotating within a threshold range, wherein the controller couples to the sensor and controls the electric motor system in response to feedback from the sensor.

9. A system, comprising:
a rotary isobaric pressure exchanger (IPX) configured to exchange pressures between a first fluid and a second fluid, the rotary IPX comprises:
a housing;
a rotor within the housing and configured to exchange the pressures between the first fluid and the second fluid;
a sleeve within the housing wherein the rotor is configured to rotate within the sleeve; and

an electric motor system coupled to the rotary IPX and configured to rotate the rotor, the electric motor system comprises:
a first magnet coupled to an exterior surface of the housing; and
a second magnet within the rotor, wherein interaction between the first magnet and the second magnet are configured to rotate the rotor.

10. The system of claim 9 , wherein the first fluid is a substantially particulate free fluid and the second fluid is a particulate laden fluid.

11. The system of claim 9 , wherein the first magnet and the second magnet comprise permanent magnets and/or electromagnets.

12. The system of claim 9 , comprising a controller with one or more modes of operation configured to control the electric motor system, wherein the one or more modes of operation comprise at least one of a startup mode, a speed control mode, a continuous power mode, or a periodic power mode.

13. A method, comprising:
monitoring rotation of a rotor in a rotary isobaric pressure exchanger (IPX), the rotor being configured to exchange pressure between a first fluid and a second fluid;
detecting a condition when the rotor is rotating outside of a threshold range; and
operating a motor system coupled to the rotary IPX in response to the condition, wherein operating the motor system in response to the condition comprises operating a first magnet within a sleeve of the rotary IPX and a second magnet within the rotor of the rotary IPX to control rotation of the rotor.

14. The method of claim 13 , wherein monitoring rotation of the rotor comprises monitoring a flow sensor, a pressure sensor, a torque sensor, a rotational speed sensor, an acoustic sensor, a magnetic sensor, or an optical sensor with a controller.

15. The method of claim 13 , wherein operating the motor system in response to the condition comprises selecting additional modes of operation, and wherein the additional modes of operation comprise at least one of a speed control mode, a continuous power mode, or a periodic power mode.

Assignees

• Energy Recovery Inc

Inventors

• Ghasripoor Farshad
• Martin Jeremy Grant
• Theodossiou Alexander Patrick

Classifications

• F04F13/00 Primary

  Pressure exchangers · CPC title

• E21B43/267

  reinforcing fractures by propping · CPC title

• E21B43/26 Primary

  by forming crevices or fractures · CPC title

• E21B43/2607

  Surface equipment specially adapted for fracturing operations · CPC title