Earth-boring bit with an advantageous insert cutting structure
US5323865A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1992 |
| Grant date | Jun 28, 1994 |
| Priority date | — |
| Expiry date | Dec 17, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/52
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An earth-boring bit is provided with three cutters, at least one of the three cutters are provided with a heel cutting structure defined by a plurality of heel inserts having crests thereon, the heel inserts being disposed in at least one substantially circumferential heel row and the crests of the heel inserts being generally aligned traversely to the rotational axis of the cutter. At least another of the cutters is provided with a substantially circumferential row of axial inserts having crests thereon disposed proximally to the base of the cutter, the crests of the axial inserts being generally aligned with the axis of rotation of the cutter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.