Electric submersible pump with discharge recycle

Patent metadata

Field	Value
Publication number	US-11353028-B2
Application number	US-201816476509-A
Country	US
Kind code	B2
Filing date	Oct 3, 2018
Priority date	Oct 3, 2018
Publication date	Jun 7, 2022
Grant date	Jun 7, 2022

Abstract

Included are electric submersible pump assemblies, methods of use, and systems incorporating said electric submersible pump assemblies. An example electric submersible pump assembly comprises an electric submersible pump comprising a pump intake, a storage chamber in fluid communication with the discharge side of the electric submersible pump, and a tubing configured to allow for fluid communication between the pump intake and the storage chamber such that fluid may flow from the storage chamber into the pump intake.

First claim

What is claimed is:

1. An electric submersible pump assembly comprising:
an electric submersible pump comprising a motor, a pump intake, and a discharge side,
a storage chamber in fluid communication with the discharge side of the electric submersible pump, wherein the storage chamber comprises a sensor and a valve, wherein the sensor is configured to measure a discharge pressure of the discharge side of the pump, wherein the valve is coupled to a tubing, wherein the valve is a spring-loaded check valve, and
the tubing configured to allow for fluid communication between the pump intake and the storage chamber such that fluid may flow from the storage chamber into the pump intake.

2. The electric submersible pump assembly of claim 1 , wherein the valve opens when the discharge pressure of the pump is reduced below a predetermined threshold.

3. The electric submersible pump assembly of claim 1 , further comprising a filter, wherein the filter filters a portion of any solids dispersed within a fluid discharged from the pump.

4. The electric submersible pump assembly of claim 3 , wherein the filter is coupled to a production tubing, wherein the production tubing is disposed within an inner diameter of the storage chamber.

5. The electric submersible pump assembly of claim 3 , wherein the filter is configured to allow fluid flow into the storage chamber but not out of the storage chamber.

6. The electric submersible pump assembly of claim 1 , further comprising a seal assembly.

7. The electric submersible pump assembly of claim 1 , wherein the electric submersible pump is a centrifugal pump.

8. A method of operating an electric submersible pump, the method comprising:
providing an electric submersible pump assembly comprising:
an electric submersible pump comprising a pump intake and a discharge side,
a storage chamber in fluid communication with the discharge side of the electric submersible pump, wherein the storage chamber comprises a valve, wherein the valve is a spring-loaded check valve, and
a tubing configured to allow for fluid communication between the pump intake and the storage chamber such that fluid may flow from the storage chamber into the pump intake;

flowing fluid into the pump intake;
discharging fluid from the discharge side of the pump;
sensing the discharge pressure of the pump;
opening the valve when a discharge pressure of the pump is reduced below a predetermined threshold;
storing the discharged fluid in the storage chamber; and
then flowing the discharged fluid into the tubing and into the pump intake.

9. The method of claim 8 , wherein the electric submersible pump assembly further comprises a filter; wherein the method further comprises
filtering a portion of any solids dispersed within a fluid discharged from the pump.

10. The method of claim 9 , wherein the filter is coupled to a production tubing, wherein the production tubing is disposed within an inner diameter of the storage chamber.

11. The method of claim 9 , wherein the filter is configured to allow fluid flow into the storage chamber but not out of the storage chamber.

12. The method of claim 8 , wherein the electric submersible pump assembly further comprises a motor and a seal assembly.

13. The method of claim 8 , wherein the electric submersible pump is a centrifugal pump.

14. A system for operating an electric submersible pump, the system comprising:
an electric submersible pump assembly comprising:
an electric submersible pump comprising a pump intake and a discharge side,
a storage chamber in fluid communication with the discharge side of the electric submersible pump, wherein the storage chamber comprises a sensor and a valve, wherein the sensor is configured to measure a discharge pressure of the pump, wherein the valve is coupled to a tubing, wherein the valve is a spring-loaded check valve,
the tubing configured to allow for fluid communication between the pump intake and the storage chamber such that fluid may flow from the storage chamber into the pump intake,
a filter coupled to the storage chamber and a production tubing; and

the production tubing, wherein the production tubing is disposed within an inner diameter of the storage chamber.

15. The system of claim 14 , wherein the valve opens when the discharge pressure of the pump is reduced below a predetermined threshold.

16. The system of claim 14 , wherein the filter is configured to filter a portion of any solids dispersed within a fluid discharged from the pump.

17. The system of claim 14 , wherein the filter is configured to allow fluid flow into the storage chamber but not out of the storage chamber.

18. The system of claim 14 , wherein the electric submersible pump assembly further comprises a motor and a seal assembly.

19. The system of claim 14 , wherein the electric submersible pump is a centrifugal pump.

20. The system of claim 14 , wherein the electric submersible pump assembly is coupled to the production tubing with a threaded connection.

Assignees

• Halliburton Energy Services Inc

Inventors

• Dinkins Walter
• Houston David
• Brown Donn J

Classifications

• E21B47/008

  Monitoring of down-hole pump systems, e.g. for the detection of "pumped-off" conditions · CPC title

• F04D9/005

  by adducting or recycling liquid (F04D9/006 takes precedence) · CPC title

• F04D31/00 Primary

  Pumping liquids and elastic fluids at the same time · CPC title

• E21B43/128

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

• F04D13/10 Primary

  adapted for use in mining bore holes · CPC title