Drill bit
US9869131B2 · kind B2 · utility
0Cited by
2References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 8, 2014 |
| Grant date | Jan 16, 2018 |
| Priority date | — |
| Expiry date | Nov 8, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/55
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill bit comprises at least one blade, comprising a plurality of cutting elements in the form of polycrystalline diamond cutters disposed on a leading edge of the blade, at least one diamond impregnated cutting region, disposed behind the leading edge of the blade, and wherein at least one of the cutters disposed on the leading, edge is an off-tip cutting element, arranged so that it does not engage with the formation during drilling until bit wear has taken place.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.