Two prong rotary drill bit with cutting insert having edge preparation
US9347276B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 2013 |
| Grant date | May 24, 2016 |
| Priority date | — |
| Expiry date | Jul 9, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/42
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A two-prong rotary drill bit for engaging an earth strata material includes a drill bit body having an axis of rotation, the drill bit body having a head portion at an axial forward end and a shank portion at an axial rearward end, the head portion having two mounting arms offset from the axis of rotation of the drill bit body. The two-prong rotary drill bit also includes a cutting insert attached to each mounting arm at the axial forward end of the drill bit body. Each cutting insert includes a leading face facing in the direction of rotation, a top surface having a relief surface, a T-land surface extending between the leading face and the relief surface of the top surface and a cutting edge formed at the intersection of the T-land surface and the relief surface of the top surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.