IPC Subgroup
E21B 10/58 Chisel-type inserts
Introduced: January 1980
Last revised: January 2006
Full Title
Drill bits > characterised by wear resisting parts, e.g. diamond inserts > Chisel-type inserts
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- EARTH OR ROCK DRILLING; MINING
- Subclass:
- EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
Scope Notes
Limiting references: Drill bits characterised by wear resisting parts, the bit being of roller type with chisel- or button-type inserts