Cutting element having enhanced cutting geometry
US7086488B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 6, 2003 |
| Grant date | Aug 8, 2006 |
| Priority date | — |
| Expiry date | Nov 14, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/5676
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A drill bit that includes a bit body, at least one roller cone attached to the bit body and able to rotate with respect to the bit body, a plurality of cutting elements disposed on the at least one roller cone, and a barrel axis is disclosed. At least one of the plurality of cutting elements includes a first area defining a secondary wear surface, wherein the first area is formed as a convex surface on the trailing edge, a second area proximate the first area defining a main wear surface, wherein the second area is formed as a convex curved surface having a radius of curvature substantially equal to a radius of a borehole, and a third area defining a spherical cutting surface. Further, at least one of the plurality of cutting elements includes a non-spherical transition zone disposed between the third area and the first and second areas, wherein the barrel axis intersects the transition zone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.