Gyroscopic steering tool using only a two-axis rate gyroscope and deriving the missing third axis
US7813878B2 · kind B2 · utility
4Cited by
4References
7Claims
0Family size
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Key dates
| Filing date | Apr 12, 2007 |
| Grant date | Oct 12, 2010 |
| Priority date | — |
| Expiry date | Jul 2, 2028 |
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.