Methods to repair worn or eroded PDC cutters, cutters so repaired, and use of repaired PDC cutters in drill bits or other tools
US9375827B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2013 |
| Grant date | Jun 28, 2016 |
| Priority date | — |
| Expiry date | Apr 29, 2034 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/5735
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A repaired polycrystalline diamond cutter and method for fabricating the same. The cutter includes a damaged substrate that includes at least one void therein, a polycrystalline diamond table coupled to the damaged substrate, and a paste compound disposed within the voids formed about the damaged substrate. The damaged substrate and the paste compound collectively form a full circumference. The method includes obtaining a damaged cutter that includes a polycrystalline diamond table coupled to a damaged substrate having at least one void formed therein, applying a paste compound within the at least one void, melting the paste compound via induction heating, bonding the paste compound to the substrate and forming a processed PDC cutter, and grinding at least a portion of the paste compound from the processed PDC cutter to form the repaired cutter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.