Polycrystalline-diamond compact air bit
US11098541B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2018 |
| Grant date | Aug 24, 2021 |
| Priority date | — |
| Expiry date | Nov 7, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B21/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A PDC drill bit for use in downhole air drilling includes a body with a face for engaging a bottom of a hole being drilled and a gauge for engaging a side of the hole being drilled. The face includes a cone, a nose outward of the cone, a shoulder outward of the nose. The bit further includes channels formed in the face of the bit that extend from within the cone to the gauge. The channels define a plurality of blades separated by the channels. Each of the plurality of blades has a leading edge with PDC cutters mounted thereon. One or more of the channels are defined by two side walls and a bottom wall and has a length, width and depth. The width or depth remains substantially constant from a first point on its length within the cone to a second point within the shoulder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.