CUTTER, DOWNHOLE TOOL AND METHOD OF CUTTER GROOVE FORMING Russian patent published in 2015 - IPC E21B10/46 E21B10/567 E21B10/573 

FIELD: process engineering.

SUBSTANCE: set of inventions relates to downhole tools and to methods of their production. Proposed cutter comprises substrate with connection surface on substrate one end shaped for coupling inside cutter groove and multiple cutter indices on at least the section of said connection surface wherein cutter every index is arranged around central axis of the substrate and extends not that completely around said central axis and therein multiple cutter indices are, in fact, uniformly spaced apart around said central axis. Said connection surface can be precisely arranged inside cutter groove ay one position whereat said surface is not flat.

EFFECT: precise fit of cutters in downhole tool grooves.

27 cl, 7 dwg