EP 0291314 A2 1988-11-17 - Cutting structure and rotary drill bit comprising such a structure.
Cutting structure and rotary drill bit comprising such a structure.
Schneidelement und Drehbohrmeissel mit einem derartigen Element.
Structure de coupe et trépan de forage rotatif comportant une telle structure.
GB 8711255 A
A cutting structure, for use in a rotary drill bit for drilling or coring holes in subsurface formations, comprises an elongate stud 17 of hard material, such as cemented tungsten carbide, there being at least partly embedded in the stud, at one end thereof, one or more thermally stable polycrystalline diamond cutting elements 14, 15, 16. The diamond elements, which may be in the form of small rectangular blocks or cylinders, are bonded into the stud by a hot pressing or an infiltration process.
IPC 1-7 (main, further and additional classification)
IPC 8 full level (invention and additional information)
CPC (invention and additional information)
Designated contracting state (EPC)
BE CH DE FR GB LI NL SE