Continuous sampling drill bit
US10626676B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 2019 |
| Grant date | Apr 21, 2020 |
| Priority date | — |
| Expiry date | Aug 19, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/084
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill bit comprises a first and a second body received within the first body. Each of the first body and second body has a respective crown, each crown having an inner and an outer operative circumference. The outer operative circumference of the second body and the inner operative circumference of the first body can define a first volume that can receive a tubular core sample. The second body can define a break surface that breaks the tubular core sample into core pieces. The drill bit can be employed in a borehole with a reverse circulation system that pumps fluid around an outer surface of the bit, and returning fluid can carry the core pieces out of the borehole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.