Cutting element structure for roller cone bit
US7152701B2 · kind B2 · utility
26Cited by
8References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2004 |
| Grant date | Dec 26, 2006 |
| Priority date | — |
| Expiry date | Mar 18, 2025 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/52
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A roller cone drill bit includes a bit body adapted to be coupled to a drill string, a bearing journal depending from the bit body, and a single roller cone rotatably attached to the bearing journal. The single roller cone has a plurality of cutting elements, where at least one of the plurality of cutting elements is formed of an inner region that is at least partially surrounded by an outer region, where the inner region is more abrasive resistant than the outer region. Such an arrangement in a single roller cone bit allows the at least one cutting element to be “self-sharpening.”
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.