Button-type inserts (E21B10/52 takes precedence)

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 > Button-type inserts (E21B10/52 takes precedence)

Child Classifications

Navigate with arrow keys, Enter to open

• E21B 10/567 with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts