Matrix body PDC drill bit
US10968705B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2019 |
| Grant date | Apr 6, 2021 |
| Priority date | — |
| Expiry date | Feb 3, 2039 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/42
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A matrix body PDC drill bit includes a drill crown and a bit body, and further includes a combined limiting sleeve. A connecting block and a connecting sleeve are provided at a junction of the drill crown and the bit body; multiple engaging teeth and engaging grooves for defining circumferential rotation and mutual engagement are provided between the connecting sleeve and the connecting block; the combined limiting sleeve includes several sub-limiting sleeves which are combined and spliced along an outer peripheral surface of the connecting sleeve and are configured to fixedly connected into a whole; an inner side of each sub-limiting sleeve is provided with upper limiting bumps and lower limiting bumps; the connecting block is inserted into the connecting sleeve to allow the upper limiting bumps and the lower limiting bumps to abut against fixed end surfaces of the connecting block and the connecting sleeve, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.