WELLBORE DRILL BIT HAVING SHEAR CUTTERS AND GOUGING CUTTERS

摘要

A fixed cutter drill bit includes a bit body and at least one primary blade formed in the bit body and defining a surface profile on the bit body. The at least one primary blade extends from a first selected radial distance from a center or rotation of the bit body to a gage portion. At least one shear cutter affixed to the at least one blade. At least one gouging cutter affixed to the bit body rotationally ahead of the at least one blade. At least one nozzle is disposed in the bit body in a rotational position between the at least one primary blade and the at least one gouging cutter.