Abstract: Disclosed is a drill bit with an eduction jet which discharges drilling mud upwardly through nozzles having wedge shaped apertures oriented such that the wedge shape is tangential to the central axis about which the drill bit rotates. Expelled mud projects a wedge shaped dynamic stream of mud which retains the definition as an eductive column which rotates with the drill bit and therefore has relative motion revolving transverse to the hydrostatic column bearing upon the bit. Throughout the regions in which it retains definition, the eductive column creates a low pressure zone immediately behind it and the low pressure zone enhances the ability of flushing jets to remove cuttings from the bottom of the borehole by drawing the cuttings above the drill bit. The manufacture of drill bits with wedge shaped eduction jets is also disclosed, including the manufacture by modification of conventional tri-cone bits.