Abstract

Drill bit (230) for a drilling tool (1) comprising a drill bit member (231) which delimits a through-channel (231C) for the passage of the fluid flow and comprising an external surface (232), from which there extend a plurality of drilling members (233) which are uniformly distributed over the external surface (232), each drilling member (233) comprising a fin (233A) which extends from the external surface (232) and a plurality of drilling teeth (233B) which extend from the fin (233A) and which each comprise a base (233B1) and a cutting element (233B2) which is arranged at the end of the base (233B1), the drill bit comprising a high-voltage electrode (232C) which is arranged at the centre of the central facial opening (231A1) and each drilling member (233) comprising an earth electrode (233C) which is positioned at the end of the fin (233A), at the high-voltage electrode (232C), so as to at least partially extend in line with the central facial opening (231A1).

IPC Classes  ?

• E21B 7/15 - Drilling by use of heat, e.g. flame drilling of electrically generated heat
• E21B 10/43 - Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
• E21B 10/567 - Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts

Abstract

Drill bit (230) for a drilling tool (1) comprising a drill bit member (231) which delimits a through-channel (231C) for the passage of the fluid flow and comprising an external surface (232), from which there extend a plurality of drilling members (233) which are uniformly distributed over the external surface (232), each drilling member (233) comprising a fin (233A) which extends from the external surface (232) and a plurality of drilling teeth (233B) which extend from the fin (233A) and which each comprise a base (233B1) and a cutting element (233B2) which is arranged at the end of the base (233B1), the drill bit comprising a high-voltage electrode (232C) which is arranged at the centre of the central facial opening (231A1) and each drilling member (233) comprising an earth electrode (233C) which is positioned at the end of the fin (233A), at the high-voltage electrode (232C), so as to at least partially extend in line with the central facial opening (231A1).

IPC Classes  ?

• E21B 7/15 - Drilling by use of heat, e.g. flame drilling of electrically generated heat
• E21B 10/00 - Drill bits
• E21C 37/18 - Other methods or devices for dislodging with or without loading by electricity

Abstract

Drill bit (230) for a drilling tool (1) comprising a drill bit member (231) which delimits a through-channel (231C) for the passage of the fluid flow and comprising an external surface (232), from which there extend a plurality of drilling members (233) which are uniformly distributed over the external surface (232), each drilling member (233) comprising a fin (233A) which extends from the external surface (232) and a plurality of drilling teeth (233B) which extend from the fin (233A) and which each comprise a base (233B1) and a cutting element (233B2) which is arranged at the end of the base (233B1), the drill bit comprising a high-voltage electrode (232C) which is arranged at the centre of the central facial opening (231A1) and each drilling member (233) comprising an earth electrode (233C) which is positioned at the end of the fin (233A), at the high-voltage electrode (232C), so as to at least partially extend in line with the central facial opening (231A1).

IPC Classes  ?

• E21B 7/15 - Drilling by use of heat, e.g. flame drilling of electrically generated heat
• E21C 37/18 - Other methods or devices for dislodging with or without loading by electricity