IPC Subgroup
E21B 10/44 Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
Introduced: January 1980
Last revised: January 2006
Full Title
Drill bits > Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
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: Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits or fish tail bits