Anti-balling drill bit
US5562171A · kind A · utility
10Cited by
14References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 4, 1995 |
| Grant date | Oct 8, 1996 |
| Priority date | — |
| Expiry date | May 4, 2015 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/18
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The invention concerns an anti-balling drill bit. The drill bit includes an approximately cylindrical steel body provided at one end with axial arms on which are mounted toothed conical wheels. The bottom of the tool body has a dome shaped profile such as a parabolic profile, whose flanks are joined at an apex located approximately along the axis (x--x) of the tool. The flanks ascend toward the cylindrical wall of the body through gaps between the arms with unbroken surfaces and without edges, each arm bearing at its end at least one extension nozzle for emitting a liquid jet, and nozzles also being mounted in said flanks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.