(B, ) the utility model relates to a well drilling job site is a from inhaling vacuum dredge pump with pump drainage water mechanical device technical field, it includes three -way pipe, ring nozzle, clamp ring, connection high pressure union, inhales pipe and discharge pipe, the three -way pipe is including fixed left side pipe, right side pipe and low tube together, be equipped with first annular groove and the second annular groove that the diameter reduces in proper order from a left side to the right side on the inside pipe wall of a left side, the ring nozzle matches the suit in the second annular groove. The internal and external network physical isolation data exchange device is reasonable and compact in structure, high durability and convenient use, the fluid passes through the ring nozzle and forms the high -speed jet, from the discharge pipe blowout, realize the local negative pressure on the interior upper portion of three -way pipe, inhale drilling fluid etc. Through inhaleing the pipe, discharge from the discharge pipe, realize the recovery of drilling fluid, functions such as well cementation grout blowdown, the problem of damage stock pump blade because of probably there being big solid particle in the liquid is solved, and is simple in structure, and convenient for dismounting, it is reliably durable, the cost is lowered, safety and reliability. (B, )