Steel tooth cutter element with expanded crest
US6367568B1 · kind B1 · utility
91Cited by
14References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 15, 2001 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | May 27, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB33Y80/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A cutter element for a drill bit. The cutter element has a base portion and an extending portion and the extending portion has either a zero draft or a negative draft with respect to the base portion. The non-positive draft allows more of the borehole bottom to be scraped using fewer cutter elements. The cutter elements having non-positive draft can be either tungsten carbide inserts or steel teeth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.