Drill bit with cutter element having crossing chisel crests
US7798258B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2007 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | May 17, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/16
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill bit for cutting a borehole comprises a bit body including a bit axis. In addition, the drill bit comprises a rolling cone cutter mounted on the bit body. Further, the drill bit comprises a cutter element having a base portion with a diameter and a cutting portion extending therefrom. The cutting portion comprising a first pair of flanking surfaces that taper towards one another to form a first elongate chisel crest, and a second pair of flanking surfaces that taper towards one another to form a second elongate chisel crest that intersects the first elongate chisel crest in top view. The first crest tangent angle at 10% of the diameter measured radially from the central axis on the first elongate chisel crest in profile view is greater than 75° and less than or equal to 90°.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.