A steel drilling rod for top rush formula blast hole drilling rig

• Main Author: QIAN LIQUN
• Format: Patent
• Language: Chinese; English
• Published: 04.07.2017
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model relates to a rig drilling rod field especially relates to a steel drilling rod for top rush formula blast hole drilling rig. Present drilling rod screw portion or the easy fracture of screw root and screw portion are not wear -resisting, for solving above -mentioned problem, the utility model discloses a steel drilling rod for top rush formula blast hole drilling rig, including the cavity body of rod, cavity screwed joint no. 1 and cavity screwed joint no. 2, cavity screwed joint no. 1 and cavity screwed joint's no. 2 hardness all is higher than the hardness of the cavity body of rod, cavity screwed joint no. 1 and two difference friction weld in the both ends of the cavity body of rod of cavity screwed joint, the both ends terminal surface of the cavity body of rod, cavity screwed joint no. 1 and cavity body of rod welded one end terminal surface and cavity screwed joint no. 2 all have the sunk structure that is used for holding the interior overlap of friction weld production with cavity b