Drill way gas drainage under suction dust removal blowout preventer

The utility model provides a drill way gas drainage under suction dust removal blowout preventer, include the box, prevent spouting baffle and nozzle stub, the fixed nozzle stub that is equipped with in top of box, the into drilling rod import of drilling rod is do not seted up in the central punishment on two preceding, back surfaces of box, the diameter of drilling rod import is unanimous with the external diameter of drilling rod, the bottom of box is equipped with row cinder notch, it is the loudspeaker degree of lip-rounding to arrange the cinder notch, it adopts the belt to make to prevent spouting the baffle, the box preceding through the bolt install the middle part open there is a through-hole prevent spouting the baffle, prevent spouting the through-hole and drilling rod import intercommunication of baffle, a spraying shower nozzle is respectively welded on the upper portion of box left and right sides face, also respectively weld a spraying shower nozzle on the face of row's cinder notch left and right sides, the water spray end of spraying shower nozzle sets up in the box, the spraying shower nozzle is for inserting the setting on the box in the slant. The utility model discloses light in weight, easily disassemble, install convenient to use, effectively strengthened and removed dust and prevent the orifice effect.