Rock bit and inserts with wear relief grooves
US7686106B2 · kind B2 · utility
5Cited by
96References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2007 |
| Grant date | Mar 30, 2010 |
| Priority date | — |
| Expiry date | Jul 26, 2027 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/50
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A rolling cone drill bit includes at least one cutter element comprising a base portion and a cutting portion extending from the base portion. The cutting portion includes a cutting surface with an apex defining an extension height and at least one rib extending from the apex toward the base portion. In addition, the at least one rib has a convex outer surface in profile view.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.