Abstract: An apparatus for directing "supercharged," i.e., high velocity streams of drilling fluid upward around a reduced area between the apparatus and the borehole. These high velocity "supercharged" streams, by virtue of the Bernoulli effect become very low in static fluid pressure. These high velocity, low pressure streams decrease the hydrostatic pressure at the drill bit and accomplish a more efficient drilling by the bit. What is provided is a main tool body positioned along the drill string intermediate a section of drill pipe and the drill bit. The tool further comprises lower an external body portion which is rotated at a rotational velocity three times slower than the rotation of the velocity of the drill string.