Spout formula diamond bit at bottom of helical tooth ladder

The utility model relates to a spout formula diamond bit at bottom of helical tooth ladder, including the drill steel body and the diamond operational layer of setting at the drill steel end of body, the whole tubular structure that is of the drill steel body, the setting of diamond operational layer is in the pipe end and the whole cone -shaped structure that is of the drill steel body, the rock core import has been offered to the toper end of diamond operational layer, the positive propeller that the generating line is provided with the on the whole shape piece of diamond operational layer, the secter pat sets up a plurality ofly along the circumference direction interval of diamond operational layer, the secter pat sets up total projected area and is less than at the bottom of drill bit lip projected area's 40%, form fan -shaped recess between secter pat and the secter pat, the tank bottom of fan -shaped recess is provided with the hole for water spraying, the hole for water spraying communicates with the