Cutting edge for monobloc drilling tools
US5823277A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | May 1, 1997 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | May 1, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/573
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An integral tool bit for drilling a rock formation, including a cemented metal carbide holder (30) attached to the tool and joined, e.g. soldered, to a plate (34) in the form of a cylindrical disc made from polycrystalline diamond particles and having a side wall (40), and a substantially flat free surface (36). The plate (34) is positioned so that the plane of its free flat surface (36) is at an acute angle (.alpha.) to a line (N) normal to the surface (25) of the rock formation, and the angle is directed in the same direction as the forward direction (F) of the drill bit so that the plate engages the rock formation with its side wall (40).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.