IPC Subgroup
E21B 10/61 characterised by nozzle structure
Introduced: January 2006
Full Title
Drill bits > characterised by conduits or nozzles for drilling fluids > characterised by nozzle structure
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