Drilling diamond bit with protection of carbid nozzles

Drilling diamond comprises a housing, the blades exstending over it, equipped with rock cutting and protective cutter PDC, the washing carbide nozzles in slots on the housing, the housing, the central cavity in the nipple of the housing. the channel system supplying washing liquid to the washing liquid to the washing carbide nozzles. In the central cavity of the nipple the devise is mounted to protect the flushing nozzles from clogging. Made in the form of a cylinder or other body of revolution, open at one end and closed at the other, with an outer annular shoulder from the open end for mounting and fixing on the step of the nipple cavity, a plurality of holes of round or other shapes is made in the wall of the devise for passage of washing liquid. EFFECT: improving the reliability and efficiency of the diamond bit operation, protection against clogging of washing carbide nozzles.