Drill bit
US11008814B2 · kind B2 · utility
3Cited by
9References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2018 |
| Grant date | May 18, 2021 |
| Priority date | — |
| Expiry date | Nov 12, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/56
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill bit including a body having a face, a blade disposed on the face, and a row of cutters disposed on the blade. At least some of the cutters may have alternating positive back rake angles. The difference between a majority of back rake angles on adjacent cutters may be less than 20°.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.