CUTTING ELEMENT INSERT FOR BACK-UP CUTTERS IN STEEL-BODIED ROTARY DRILL BITS, STEEL-BODIED ROTARY DRILL BITS SO EQUIPPED, AND METHODS OF MANUFACTURE THEREFOR

摘要

Cutter inserts for rotary drill bits include a cutter insert body (50) having a cutter recess (54) configured to receive a backup cutter therein (18). Rotary drill bits for drilling a subterranean formation include at least one such cutter insert affixed to a blade (14) rotationally behind a cutter pocket for a primary cutter. Methods of manufacturing such drill bits include providing a bit body (12) having a plurality of blades (14). A cutter insert (50) is provided and secured within a cutter insert recess (54) formed in the face of a blade (14). A backup cutter (18) is secured within a cutter recess (54) of the cutter insert.