Double -deck disjunctor drill bit of diving drill machine three wings cage

The utility model relates to a double -deck disjunctor drill bit of diving drill machine three wings cage, including ring flange, drill bit coupling, leading drill bit, basket, the drill tip of current three wings cage type bit, its characterized in that: include still that a rearmounted drill bit the same with leading drill bit structure and basket are by the extension, the ring flange is located the basket top and welds integratively through drill bit coupling and basket become, rearmounted drill bit, about leading drill bit divides and at a distance of 40 80mm welding on the basket and every interplane aerial contained angle of rearmounted every pterygoid lamina that bores and leading drill bit be 60o, the drill tip welding is in the basket bottom, the beneficial effects are that the nature yield promotes, the mud property is more optimized, avoided because the mud property difference causes the pore -forming necking down, irregular scheduling problem, the disadvantage that the single -end drill bit set up