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Twist drill rod

Twist drill rod

On the Basis of original  twist coal drill rod ,the high quality steel and T type steel welded structure ,the advanced pres stressed winding welding manufacturing process and model coal drill pipe.New coal drill pipe has the advantages of light weight(45% lighter than the old twist drill pipe),footage quickly,small dust,vertical drilling down without leaving the cutting ,pore forming analysis.The new coal drill rod and the drill head can be separated using the tail ,prolong the life.Spring pin or screw connection,convenient and quick.The new coal drill pipe is divided into single screw blade,double helical blade ,water type and dry type.