Drill bit having shaped leading cutter and impregnated backup cutter
US10550644B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2018 |
| Grant date | Feb 4, 2020 |
| Priority date | — |
| Expiry date | Aug 6, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/55
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A bit for drilling a wellbore includes: a shank having a coupling formed at an upper end thereof; a body mounted to a lower end of the shank; and a cutting face forming a lower end of the bit. The cutting face includes: a blade protruding from the body; a leading cutter including: a substrate mounted in a pocket formed in a leading edge of the blade; and a cutting table made from a superhard material, mounted to the substrate, and having a non-planar working face with a cutting feature; and a backup cutter mounted in a lower face of the blade at a position trailing the leading cutter and made from a composite material including a ceramic or cermet matrix impregnated with a superhard material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.