Hybrid drill bit with counter-rotation cutters in center
US10557311B2 · kind B2 · utility
3Cited by
231References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2015 |
| Grant date | Feb 11, 2020 |
| Priority date | — |
| Expiry date | Nov 18, 2035 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A hybrid drill bit includes both fixed cutting elements and rotational cutting elements thereon. The fixed cutting elements are affixed to a bit body and define a peripherally-located fixed cutting structure disposed radially outward of the rotational cutting elements. The rotational cutting elements define a centrally-located counter-rotational cutting structure including two hemispherical counter-rotational cutting members mounted for counter-rotation with respect to one another on an axis generally perpendicular to a bit body rotational axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.