Gyroscopic steering tool using only a two-axis rate gyroscope and deriving the missing third axis
US7234540B2 · kind B2 · utility
12Cited by
7References
22Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 5, 2004 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Jul 14, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A two-axis gyroscope used on a bottom hole assembly can be used for determining a rate of rotation about the rotational axis of a BHA. The method takes advantage of possible misalignment of at least one axis of the two axis gyroscope from orthogonality with respect to the rotational axis of the BHA, resulting in the misaligned gyro being sensitive to BHA rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.