Coring bit motor and method for obtaining a material core sample
US6371221B1 · kind B1 · utility
40Cited by
16References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2000 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Oct 11, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention provides an improved coring motor for use in obtaining a core sample from the side wall of a drilled bore hole. The present invention provides controllable rotation, extension and retraction of the coring bit relative to the side wall without complicated positioning linkages and with conservation of space for use in slim tools for use downhole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.