Polycrystalline diamond compact including an at least bi-layer polycrystalline diamond table, methods of manufacturing same, and applications therefor
US8978789B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2010 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Oct 10, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/5735
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In an embodiment, a polycrystalline diamond compact (“PDC”) includes a substrate and a polycrystalline diamond (“PCD”) table bonded to the substrate. The PCD table includes an upper surface. The PCD table includes a first PCD region including bonded-together diamond grains and exhibits a first diamond density. At least a portion of the first PCD region extending inwardly from the working surface is substantially free of metal-solvent catalyst. The PCD table includes an intermediate second PCD region bonded to the substrate, which is disposed between the first PCD region and the substrate. The second PCD region includes bonded-together diamond grains defining interstitial regions, with at least a portion of the interstitial regions including metal-solvent catalyst disposed therein. The second PCD region exhibits a second diamond density that is greater than that of the first diamond density of the first PCD region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.