In-drilling alignment
US7823661B2 · kind B2 · utility
6Cited by
20References
20Claims
0Family size
Inventors
Key dates
| Filing date | Jun 24, 2008 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Oct 14, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
To limit the growth of errors of an inertial navigation system for measurement-while-drilling, in-drilling alignment methods can be used. A pneumatics-based design of an apparatus for an in-drilling alignment method and its implementation downhole are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.