DRILLING BIT ROLLER CUTTER Russian patent published in 2010 - IPC E21B10/16 

FIELD: mining.

SUBSTANCE: drilling bit roller cutter includes housing with peripheral, intermediate and apical rims equipped with hard-alloy teeth. The specific feature of the proposed roller cutter is optimisation of its dimensions along intermediate rims by considering the arm of curvature of roller cutter housing within the range of diametre of hard-alloy tooth, which is determined by mathematical formula.

EFFECT: increasing rock breaking efficiency, improving the attachment reliability of teeth and reducing the cost of drilling work.

2 dwg