IPC Subgroup
E21B 10/36 Percussion drill bits
Introduced: January 1980
Last revised: January 2006
Full Title
Drill bits > Percussion drill bits
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
Related Keywords
BITS for percussive toolsportable percussive tools
2 direct subcodes
Child Classifications
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- E21B 10/38 characterised by conduits or nozzles for drilling fluids
- E21B 10/4 with leading portion