Well tools selectively responsive to magnetic patterns
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-023/00
E21B-034/06
E21B-041/00
E21B-047/09
E21B-047/01
출원번호
US-0440823
(2012-04-05)
등록번호
US-9506324
(2016-11-29)
발명자
/ 주소
Kyle, Donald G.
Merron, Matthew J.
Fripp, Michael L.
출원인 / 주소
Halliburton Energy Services, Inc.
대리인 / 주소
Locke Lord LLP
인용정보
피인용 횟수 :
0인용 특허 :
69
초록▼
A system for use with a subterranean well can include a magnetic sensor, a magnetic device which propagates a magnetic field to the magnetic sensor, and a barrier positioned between the magnetic sensor and the magnetic device. The barrier can comprise a relatively low magnetic permeability material.
A system for use with a subterranean well can include a magnetic sensor, a magnetic device which propagates a magnetic field to the magnetic sensor, and a barrier positioned between the magnetic sensor and the magnetic device. The barrier can comprise a relatively low magnetic permeability material. A method of isolating a magnetic sensor from a magnetic device in a subterranean well can include separating the magnetic sensor from the magnetic device with a barrier interposed between the magnetic sensor and the magnetic device, the barrier comprising a relatively low magnetic permeability material. A well tool can include a housing having a flow passage formed through the housing, a magnetic sensor in the housing, and a barrier which separates the magnetic sensor from the flow passage, the barrier having a lower magnetic permeability as compared to the housing.
대표청구항▼
1. A system for use with a subterranean well, the system comprising: a magnetic sensor;a magnetic device which propagates a magnetic field to the magnetic sensor, wherein the magnetic device comprises multiple magnetic field-producing components arranged in a pattern on an outer surface of a sphere,
1. A system for use with a subterranean well, the system comprising: a magnetic sensor;a magnetic device which propagates a magnetic field to the magnetic sensor, wherein the magnetic device comprises multiple magnetic field-producing components arranged in a pattern on an outer surface of a sphere, and wherein the pattern comprises spaced apart positions distributed along a continuous undulating path about the sphere to provide a magnetic field a substantial distance from the magnetic device no matter the orientation of the sphere; anda barrier positioned between the magnetic sensor and the magnetic device, the barrier comprising a relatively low magnetic permeability material. 2. The system of claim 1, wherein the barrier isolates pressure between the magnetic sensor and the magnetic device. 3. The system of claim 1, wherein the barrier is carried in a housing comprising a relatively high magnetic permeability material. 4. The system of claim 1, wherein the relatively low magnetic permeability material comprises a nonmagnetic material. 5. The system of claim 1, wherein the relatively low magnetic permeability material comprises Inconel. 6. The system of claim 1, wherein the barrier pressure isolates a passage in which the magnetic device is disposed from a chamber in which the magnetic sensor is disposed. 7. The system of claim 6, wherein the chamber surrounds the passage. 8. A method of isolating a magnetic sensor from a magnetic device in a subterranean well, the method comprising: forming the magnetic device with multiple magnetic field producing components arranged in a pattern on an outer surface of a sphere, wherein the pattern comprises spaced apart positions distributed along a continuous undulating path about the sphere to provide a magnetic field a substantial distance from the magnetic device no matter the orientation of the sphere; andseparating the magnetic sensor from the magnetic device with a barrier interposed between the magnetic sensor and the magnetic device, the barrier comprising a relatively low magnetic permeability material. 9. The method of claim 8, further comprising the barrier isolating pressure between the magnetic sensor and the magnetic device. 10. The method of claim 8, further comprising disposing the barrier in a housing comprising a relatively high magnetic permeability material. 11. The method of claim 8, wherein the relatively low magnetic permeability material comprises a nonmagnetic material. 12. The method of claim 8, wherein the relatively low magnetic permeability material comprises Inconel. 13. The method of claim 8, further comprising the barrier pressure isolating a passage in which the magnetic device is disposed from a chamber in which the magnetic sensor is disposed. 14. The method of claim 13, wherein the chamber surrounds the passage. 15. A well tool, comprising: a housing having a flow passage formed through the housing;a magnetic sensor in the housing;a barrier which separates the magnetic sensor from the flow passage, the barrier having a lower magnetic permeability as compared to the housing; anda magnetic device which propagates a magnetic field to the magnetic sensor, wherein the magnetic device comprises multiple magnetic field-producing components arranged in a pattern on an outer surface of a sphere, and wherein the pattern comprises spaced apart positions distributed along a continuous undulating path about the sphere to provide a magnetic field a substantial distance from the magnetic device no matter the orientation of the sphere. 16. The well tool of claim 15, wherein the magnetic device is disposed in the flow passage. 17. The well tool of claim 15, wherein the barrier isolates pressure between the magnetic sensor and the magnetic device. 18. The well tool of claim 15, wherein the barrier comprises a nonmagnetic material. 19. The well tool of claim 15, wherein the barrier comprises Inconel. 20. The well tool of claim 15, wherein the barrier pressure isolates the flow passage from a chamber in which the magnetic sensor is disposed. 21. The well tool of claim 20, wherein the chamber surrounds the flow passage.
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