CPC Subgroup
E21B 10/46 characterised by wear resisting parts, e.g. diamond inserts
Full Title
Drill bits (specially adapted for deflecting the direction of boring ; with means for collecting substances E21B27/00) > characterised by wear resisting parts, e.g. diamond inserts
5 direct subcodes
Child Classifications
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- E21B 10/48 the bit being of core type
- E21B 10/50 the bit being of roller type
- E21B 10/54 the bit being of the rotary drag type, e.g. fork-type bits
- E21B 10/56 Button-type inserts (E21B10/52 takes precedence)
- E21B 10/58 Chisel-type inserts ( E21B10/52 take precedence)