Cutting inserts, cones, earth-boring tools having grading features, and related methods
US9217295B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 23, 2013 |
| Grant date | Dec 22, 2015 |
| Priority date | — |
| Expiry date | Oct 8, 2033 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/573
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Earth-boring tools include one or more cutting elements having at least one grading feature positioned a known distance from an initial working surface of the cutting element. Methods of grading cutting element loss on earth-boring tools include comparing locations of wear surfaces on cutting elements to locations of one or more grading features in or on the cutting elements. In some embodiments, a cutting element may comprise an insert having a generally cylindrical body, a substantially planar cutting face surface, a substantially arcuate side surface, and at least one grading feature. In additional embodiments, a cutting element may comprise a tooth having one or more grading features.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.