Impregnated bit with increased binder percentage
US8225890B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 21, 2009 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | Jan 26, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/54
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Control of the carbide volume in the matrix in an impregnated bit is accomplished by coating the hard particles in the matrix to space them further apart to increase the soft binder percentage in a controllable manner. The softer binder due to lower volume content of hard particles allows more rapid matrix wear in the softer formations to allow more diamond grit to cut better before getting flat spots and to be replaced faster with additional diamond grit further into the matrix as the higher content of the softer binder and the softer coating on the hard particles in the matrix promotes more effective cutting with more frequent emergence of diamond grit on the bit face as cutting progresses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.