Lockable motor drive
US6712159B2 · kind B2 · utility
10Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2002 |
| Grant date | Mar 30, 2004 |
| Priority date | — |
| Expiry date | Apr 23, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention provides a motor drive assembly for rotatably positioning and locking a drive shaft suitable for use with a measurement-while-drilling (MWD) downhole assembly for use in drilling boreholes which utilizes gyroscopes, magnetometers and accelerometers for determining the borehole inclination and azimuth during the drilling of the borehole. The motor drive assembly can rotate the gyroscope and other sensors on the tool to one of a plurality of preselected positions and optionally lock the sensors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.