Apparatus, system and method of a magnetically shielded wellbore gyroscope

• US 10,982,530 B2
• Filed: 04/03/2016
• Issued: 04/20/2021
• Est. Priority Date: 04/03/2016
• Status: Active Grant

• Current Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Original Assignee: Schlumberger Technology Corporation (Schlumberger NV)
• Inventors: Igarashi, Juei, Kuroiwa, Sogo, Sato, Shigeru, Kamiya, Akira
• Primary Examiner(s): Culler, Jill E
• Application Number:
  US15/089,586
• Publication Number:
  US 20170284188A1
• Time in Patent Office: 1,843 Days
• Field of Search: None
• CPC Class Codes: E21B 47/024 of devices in the borehole determining slope or direction of the borehole E21B47/022
• CPC Class Codes: E21B 47/092 by detecting magnetic anomalies
• CPC Class Codes: E21B 47/12 Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
• CPC Class Codes: E21B 7/04 Directional drilling
• CPC Class Codes: G01C 19/5684 the devices involving a micromechanical structure

Abstract

A gyroscope package, system and method for use in a downhole tool suitable are provided. The gyroscope package, system and method includes a housing coupleable with a downhole tool, a gyroscope body within the housing, and an inductive-type MEMS gyroscope. The MEMS gyroscope includes a magnetic shield disposed around the inductive-type MEMS gyroscope to magnetically shield the inductive-type MEMS gyroscope.

Claims

1. A magnetically shielded inductive-type MEMS gyroscope package for use in a downhole tool suitable for operation within a wellbore penetrating a subterranean formation, comprising:

a housing coupleable with the downhole tool;

a motor within the housing;

a gyroscope body rotatably provided within the housing and coupled to the motor, wherein the gyroscope body comprises an axle that comprises a rotation axis and a hollow body coupled to the axle wherein the axle passes through hollow body axle openings of the hollow body, wherein;

the gyroscope body contains a single gyroscope therein;

the single gyroscope in the gyroscope body is an inductive-type MEMS gyroscope that comprises a casing and an input axis orthogonal to the rotation axis, wherein the inductive-type MEMS gyroscope and casing are mounted to the axle within the hollow body; and

the rotation axis of the gyroscope body is selectively rotatable by the motor in each of x, y, and z directions, such rotation rotating the gyroscope body and thereby changing an orientation of the input axis of the single gyroscope;

a magnetic shield covering a surface of the hollow body around all regions of the inductive-type MEMS gyroscope to magnetically shield the inductive-type MEMS gyroscope; and

a protective material disposed on, covering and mechanically protecting the surface of the magnetic shield.

2. The magnetically shielded inductive-type MEMS gyroscope package as set forth in claim 1, wherein the protective material is provided over a hollow body interior surface and a hollow body exterior surface.

3. The magnetically shielded inductive-type MEMS gyroscope package as set forth in claim 1, wherein the inductive-type MEMS gyroscope comprises a vibrating ring.

4. The magnetically shielded inductive-type MEMS gyroscope package as set forth in claim 1, wherein the magnetic shield comprising one or more of permalloy, supermalloy, PC-permalloy, permendur, or μ

-metal.

5. The magnetically shielded inductive-type MEMS gyroscope package as set forth in claim 1, wherein the magnetic shield covers an entirety of the surface of the hollow body.

6. The magnetically shielded inductive-type MEMS gyroscope package as set forth in claim 1, wherein the magnetic shield is integrally formed with the hollow body.

7. The magnetically shielded inductive-type MEMS gyroscope package as set forth in claim 1, wherein the protective surface has a hardness greater than that of steel.

8. The magnetically shielded inductive-type MEMS gyroscope package as set forth in claim 1, wherein the magnetic shield has a magnetic permeability that is at least 10 times greater than that of steel.

9. The magnetically shielded inductive-type MEMS gyroscope package as set forth in claim 1, wherein the magnetic shield has a relative permeability of at least 100.

10. The magnetically shielded inductive-type MEMS gyroscope package as set forth in claim 1, further comprising a casing magnetic shield formed as a layer over the casing.

11. The magnetically shielded inductive-type MEMS gyroscope package as set forth in claim 1, wherein a thickness of the magnetic shield is greater than 100 micrometers.

12. The magnetically shielded inductive-type MEMS gyroscope package as set forth in claim 1, wherein the magnetic shield completely envelopes the inductive-type MEMS gyroscope package.

13. The magnetically shielded inductive-type MEMS gyroscope package as set forth in claim 1, wherein the single inductive-type MEMS gyroscope is rotatable in six directions inside the housing.

14. A system for providing angular measurement in subterranean oil well drilling and logging environments, comprising:

a downhole tool positionable within a wellbore penetrating a subterranean formation, the downhole tool comprising a housing;

a motor within the housing;

a gyroscope body rotatably provided within the housing and coupled to the motor, wherein the gyroscope body comprises an axle that comprises a rotation axis and a hollow body coupled to the axle wherein the axle passes through hollow body axle openings of the hollow body, and wherein;

the gyroscope body contains a single gyroscope therein;

the single gyroscope in the gyroscope body is an inductive-type MEMS gyroscope that comprises a casing and an input axis orthogonal to the rotation axis, wherein the inductive-type MEMS gyroscope and casing are mounted to the axle within the hollow body; and

the rotation axis of the single gyroscope is selectively rotatable by the motor in each of x, y, and z directions, such rotation rotating the gyroscope body and thereby changing an orientation of the input axis of the single gyroscope;

a magnetic shield integrally formed with the hollow body to completely envelope the inductive-type MEMS gyroscope with the magnetic shield and magnetically shield the inductive-type MEMS gyroscope; and

a protective material disposed on, covering and mechanically protecting the surface of the magnetic shield.

15. The system as set forth in claim 14, wherein the gyroscope body is configured to be flipped within the housing to selectively rotate the rotation axis and change the orientation of the input axis of the single.

16. The system as set forth in claim 14, wherein the magnetic shield comprising one or more of permalloy, supermalloy, PC-permalloy, permendur, or μ

-metal.

17. The system as set forth in claim 14, wherein the magnetic shield is provided over a hollow body interior surface or a hollow body exterior surface.

18. A method of monitoring angular measurement of a downhole tool, the method comprising:

securing a single inductive-type MEMS gyroscope within a gyroscope body, wherein the gyroscope body comprises an axle that comprises a rotation axis and a hollow body coupled to the axle wherein the axle passes through hollow body axle openings of the hollow body, the rotation axis being movable relative in x, y, and z directions and the hollow body having a hollow body inner surface and a hollow body outer surface and wherein the single inductive-type MEMS gyroscope comprises a casing and an input axis orthogonal to the rotation axis, wherein the inductive-type MEMS gyroscope and casing are mounted to the axle within the hollow body;

providing a downhole tool, the downhole tool having a housing with a housing outer surface and a housing inner surface, and being constructed to hold the gyroscope body therein;

positioning a magnetic shield on one or more of the hollow body inner surface or the hollow body outer surface, wherein positioning the magnetic shield includes completely enveloping the inductive-type MEMS gyroscope in the magnetic shield;

providing a protective material in the form of a layer or a film on the magnetic shield for mechanically protecting at least part of the magnetic shield; and

activating a motor within the housing both to selectively change an orientation of the rotation axis in any of the x, y, and z directions and to rotate the gyroscope body about the rotation axis, and thereby change an orientation of the rotation axis and the input axis within the downhole tool.

19. The method set forth in claim 18, wherein the inductive-type MEMS gyroscope comprises a vibrating ring.

20. The method as set forth in claim 18, wherein the magnetic shield comprising one or more of permalloy, supermalloy, PC-permalloy, permendur, or μ

-metal.