Rotatable cutting elements including rolling-element bearings and related earth-boring tools and methods
US10450805B2 · kind B2 · utility
1Cited by
31References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2017 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Feb 27, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/62
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Rotatable cutting elements for earth-boring tools may include a substrate and a polycrystalline, superabrasive material secured to an end of the substrate. A sleeve may be sized and shaped to circumferentially surround at least a portion of the substrate. Rollers may be sized and shaped for positioning between, and making rolling contact with, the substrate and the sleeve, the rollers configured to rotate relative to the substrate and the sleeve and to enable the substrate to rotate relative to the sleeve. The rollers may be configured to bear at least radial forces acting on the substrate and the sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.