Drill bit for reverse drilling
US5743345A · kind A · utility
14Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1996 |
| Grant date | Apr 28, 1998 |
| Priority date | — |
| Expiry date | Jul 30, 2016 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/003
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill bit for reverse drilling in a drill hole being produced by a percussive, fluid-actuated drill includes an elongated drill bit body having a bore extending there through for transmission of a fluid, the body terminating in a head end portion and a shank end portion. Abrasive resistant drilling buttons are arrayed on both the head end portion and the shank end portion to resist abrasion by the material being drilled, during either forward or reverse drilling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.