Torque to linear displacement for downhole power regulation

Patent metadata

Field	Value
Publication number	US-11719075-B2
Application number	US-202117396013-A
Country	US
Kind code	B2
Filing date	Aug 6, 2021
Priority date	Aug 6, 2021
Publication date	Aug 8, 2023
Grant date	Aug 8, 2023

Abstract

A downhole turbine may include a stator disposed in a turbine housing, a rotor disposed between the stator and the turbine housing and wherein the rotor includes an outer housing, a gap that separates the stator and the rotor, wherein the gap is oil filled, and one or more blades disposed on the outer housing between the turbine housing and the rotor. The downhole turbine may further include a compressible medium attached to the outer housing between the stator and the outer housing, wherein the compressible medium is separated from the stator by the gap, and one or more magnets attached to an inner surface of the compressible medium, wherein the one or more magnets are separated from the stator by the gap.

First claim

What is claimed is:

1. A downhole turbine comprising:
a stator disposed in a turbine housing;
a rotor disposed between the stator and the turbine housing, wherein the rotor includes an outer housing;
a gap that separates the stator and the rotor, wherein the gap is oil filled;
one or more blades disposed on the outer housing between the turbine housing and the rotor;
a compressible medium attached to the outer housing between the stator and the outer housing, wherein the compressible medium is separated from the stator by the gap, and wherein the compressible medium is configured to expand and contract based at least partially on an electromagnetic field affecting the one or more magnets; and
one or more magnets attached to an inner surface of the compressible medium, wherein the one or more magnets are separated from the stator by the gap.

2. The downhole turbine of claim 1 , wherein the stator includes a magnetic core.

3. The downhole turbine of claim 2 , wherein one or more armature coils are disposed around the magnetic core.

4. The downhole turbine of claim 1 , wherein the compressible medium includes one or more grooves.

5. The downhole turbine of claim 1 , wherein the one or more blades are disposed in one or more adjacent rows down a length of the outer housing.

6. The downhole turbine of claim 5 , wherein the one or more blades are designed to rotate the rotor when a mud is flowing between the outer housing and the turbine housing.

7. The downhole turbine of claim 1 , wherein the one or more magnets are press fit into the compressible medium.

8. The downhole turbine of claim 1 , wherein the compressible medium is a metal.

9. The downhole turbine of claim 1 , wherein the compressible medium is an elastomer.

10. A downhole turbine comprising:
a stator disposed in a turbine housing;
a rotor disposed between the stator and the turbine housing, wherein the rotor includes an outer housing;
a gap that separates the stator and the rotor;
one or more blades disposed on the outer housing between the turbine housing and the rotor;
two or more shells attached to the outer housing between the stator and the outer housing and wherein the two or more shells are attached to each other by one or more springs; and
one or more magnets attached to an inner surface of the two or more shells.

11. The downhole turbine of claim 10 , wherein the stator includes a magnetic core.

12. The downhole turbine of claim 11 , wherein one or more armature coils are disposed around the magnetic core.

13. The downhole turbine of claim 10 , wherein the two or more shells are configured to expand and contract based at least partially on an electromagnetic field effecting the one or more magnets.

14. The downhole turbine of claim 13 , wherein the one or more springs are configured to attach to each of the two or more shells together.

15. The downhole turbine of claim 10 , wherein the one or more blades are disposed in one or more adjacent rows down a length of the outer housing.

16. The downhole turbine of claim 15 , wherein the one or more blades are designed to rotate the rotor when a mud is flowing between the outer housing and the turbine housing.

17. A method comprising:
disposing a turbine into a wellbore, wherein the turbine comprises:
a stator disposed in a turbine housing;
a rotor disposed between the stator and the turbine housing and wherein the rotor includes an outer housing;
an gap that separates the stator and the rotor;
one or more blades disposed on the outer housing between the turbine housing and the rotor;
a compressible medium attached to the outer housing between the stator and the outer housing, wherein the compressible medium is separated from the stator by the gap; and
one or more magnets attached to an inner surface of the compressible medium, wherein the one or more magnets are separated from the stator by the gap, and

compressing the compressible medium with the one or more magnets when an electromagnetic field from the stator increases in strength from a short in one or more armature coils disposed on the stator.

18. The method of claim 17 , wherein the stator includes a magnetic core.

19. The method of claim 17 , further comprising reducing a current in the one or more armature coils as the one or more magnets move away from the stator.

Assignees

• Halliburton Energy Services Inc

Inventors

• Vehra Imran Sharif
• Chinnappan Nataraj

Classifications

• E21B41/0085 Primary

  Adaptations of electric power generating means for use in boreholes · CPC title

• F03B3/04

  with substantially axial flow throughout rotors, e.g. propeller turbines {(rotors per se F03B3/126)} · CPC title

• F03B3/126

  Rotors for essentially axial flow, e.g. for propeller turbines (with adjustable blades F03B3/14) · CPC title

• F03B17/061

  with rotation axis substantially in flow direction · CPC title

• F03B3/16

  Stators · CPC title