Coring bit and method for obtaining a material core sample
US6412575B1 · kind B1 · utility
15Cited by
2References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2000 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Mar 9, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/48
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention provides a brush bit for cutting a core sample from an unconsolidated formation with reduced fragmentation or damage to the core sample by using a plurality of stiff bristles to cut rock from around the core sample. The present invention also provides an improved method of obtaining a core sample from an unconsolidated formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.