EXTRACTION METHOD OF HARD-ALLOY BITS FROM USED CONE DRILL BITS Russian patent published in 2009 - IPC C22C7/00 E21B10/00 

FIELD: mining engineering.

SUBSTANCE: invention relates to mining industry and can be used while processing and modernisation of worn-out cone bits. Extraction method of hard-alloy bits from used cone drill bits includes following operations: separation of crushers from bit with pins, taking off of press tensions in connecting openings in body of crusher for bits. Additionally separation of crushers from bit is implemented by means of pin cutting at the bottom of crusher perpendicularly to pin axis for value for value of bit deepening, and then there are implemented cross grasing distance to bits circumference on-the-mitre α=110-130° to each other, and it is created effort for bits disposal contrariwise crossing of cuts.

EFFECT: effectiveness increase of extraction process of hard-alloy bits ensured by more simple and less power-intensive extraction technique.

6 dwg