Apparatus, System and Method of A Magnetically Shielded Wellbore Gyroscope
AssigneeSchlumberger Technology Corporation
InventorsJuei Igarashi, Sogo Kuroiwa, Shigeru Sato, Akira Kamiya
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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.
Claims20
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 gyroscope body rotatably provided within the housing;
- an inductive-type MEMS gyroscope disposed within the gyroscope body;
- and
- a magnetic shield disposed around the inductive-type MEMS gyroscope to magnetically shield the inductive-type MEMS gyroscope.
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 gyroscope body rotatably provided within the housing;
- an inductive-type MEMS gyroscope disposed within the gyroscope body;
- and
- a magnetic shield disposed about the inductive-type MEMS gyroscope to magnetically shield the inductive-type MEMS gyroscope.
A method of monitoring angular measurement of a downhole tool, the method comprising:
- disposing an inductive-type MEMS gyroscope within a gyroscope body, the gyroscope body having a body inner surface and a body outer surface;
- 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 or within one or more of the body inner surface, the body outer surface, the housing inner surface, the housing outer surface, or a casing of the inductive-type MEMS gyroscope;
- and
- activating a motor within the housing both to rotate the gyroscope body about a body axis and to change an orientation of the body axis.
Dependencies are inferred from the claim text.