Drill bit insert with sinusoidal interface
US5709279A · kind A · utility
Inventor
Key dates
| Filing date | May 18, 1995 |
| Grant date | Jan 20, 1998 |
| Priority date | — |
| Expiry date | May 18, 2015 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B10/5735
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An insert is defined by the present invention. The insert is an elongate cylindrical body having two end faces. At the extended end, the end face supports a PDC layer which is bonded thereto by brazing or sintering and is formed of PDC material to resist impact or shock loading and to provide a long life. The PDC layer is joined to the insert body at a surface which is defined by a central elevated point, the point being relatively small in diameter or is a point, land wherein said straight radial lines extend downwardly and outwardly therefrom. The intercept of the end face with the outer surface of the insert body is an undulating sinusoidal wave form of multiple sinusoidal cycles. This provides a shock resistant insert construction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.