could be designed with increasing numbers of straight sections at which it would be configured with angles u201c a u201d u201c b u201d u201c c u201d u201c d u201d etc consequently the surface of the mud ramp 12 can consist of several straight sections that change in angle from each other as a continuously changing curve or as a complex curve that has both straight and curved sections together to result in a pumping of the drilling fluid up the drill bit as the drill bit rotates in the drilled hole junk slot 15 is preferably a large open pocket formed between the mud lifter ramp 12 and the side of the nozzle boss 20 and its proximate region in the area of the cone cutters and it has a relatively flow friendly size and shape the junk slot 15 allows the fluid to flow easily around the bit and is bounded on one side by mud ramp 12 and on the other by the outside surface of jet boss 20 the back i e leading side of the legs is shaped to act as a pump to carry cuttings up the hole and away from the bit the cross sectional area of fluid channel 15 is large due to the contours of the mud ramp 12 and the integration.