Cutting elements with binderless carbide layer
US6065552A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1998 |
| Grant date | May 23, 2000 |
| Priority date | — |
| Expiry date | Jul 20, 2018 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/58
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An earth-boring bit has cutting elements inserted within holes in the cutter support. The cutting element has a body of a fracture-tough material, preferably tungsten carbide which contains a binder of a soft metal. A layer of a composite carbide which is substantially free of a binder is attached to the cutting end of the body. One cutting element has a chisel-shaped cutting end with two flanks that converge. One of the flanks has the layer of binderless carbide. This insert is located at a junction between the gage surface and heel surface for engaging the sidewall of the bore. Also, gage inserts located in the gage surface have outer ends containing a layer of binderless carbide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.