Earth penetrating rotary drill bit with helical ports
US6915867B2 · kind B2 · utility
20Cited by
26References
30Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 30, 2003 |
| Grant date | Jul 12, 2005 |
| Priority date | — |
| Expiry date | Sep 8, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/38
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill bit that has a drill bit body with a side wall and opposite ends. A distal one of the opposite ends of the drill bit body receives a cutting insert. The drill bit body contains at least two helical debris ports in the side wall thereof. The drill bit body further contains a helical scallop that corresponds to each one of the helical debris ports. Each one of the helical scallops surrounds so as to define the periphery of its corresponding one of the helical debris ports.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.