Cavitating liquid jet assisted drill bit and method for deep-hole drilling
US4262757A · kind A · utility
42Cited by
12References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1978 |
| Grant date | Apr 21, 1981 |
| Priority date | — |
| Expiry date | Aug 4, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/60
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill bit and a method for deep-hole drilling in which the drill bit has mechanical cutting means located on its lower cutting face for cutting a solid surface upon rotation of the bit and a plurality of cavitating liquid jet nozzles spaced around the face of the bit to assist in the drilling action, the nozzles being located so as to discharge a plurality of downwardly directed and concentric liquid jets that cavitate to fracture the surface to be drilled in a series of non-overlapping slots as the bit is rotated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.