Impregnated bit with improved grit protrusion
US8220567B2 · kind B2 · utility
11Cited by
30References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2009 |
| Grant date | Jul 17, 2012 |
| Priority date | — |
| Expiry date | Dec 26, 2029 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/54
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A diamond impregnated drill bit features layered encapsulation of the diamond grit where the innermost layer is hardest or most abrasion resistant while succeeding layers are generally softer and less wear resistant. This can be accomplished by manipulating several variables in the encapsulation layers such as particle size or hard particle concentration. The outer layers can have added binder to make them softer. The encapsulated grit can be sintered or pre-sintered to make it less friable when handled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.