Drill bits

Introduced: January 1980

Last revised: January 2006

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

drill BITS for deep drillingdrill BITS for mining or quarryingCUTTING -tools for mine drills

10 direct subcodes

Navigate with arrow keys, Enter to open

E21B 10/02 Core bits
E21B 10/08 Roller bits
E21B 10/26 Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
E21B 10/36 Percussion drill bits
E21B 10/42 Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
E21B 10/44 Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
E21B 10/46 characterised by wear resisting parts, e.g. diamond inserts
E21B 10/6 characterised by conduits or nozzles for drilling fluids
E21B 10/62 characterised by parts, e.g. cutting elements, which are detachable or adjustable
E21B 10/64 characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe