Downhole drilling tool with a polycrystalline diamond bearing
US11187040B2 · kind B2 · utility
6Cited by
180References
32Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2019 |
| Grant date | Nov 30, 2021 |
| Priority date | — |
| Expiry date | Nov 20, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/573
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A downhole tool for use in a downhole drill string is provided. The downhole tool includes a rotor movably coupled within a stator, and a drive shaft movably coupled within a bearing housing. The drive shaft has a first end coupled with the rotor and a second end coupled with a drill bit. Bearing assemblies interfaces engagement between the drive shaft and the bearing housing, including polycrystalline diamond elements, each with an engagement surface, and an opposing engagement surface of a non-superhard metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.