Special-shaped dumbbell-shaped hard rock rotary excavating anti-deviation drill bit

• Main Authors: LI WEIMING, LIU JIAN, XU GUXING, LEI BIN, ZHANG HUICHUN
• Format: Patent
• Language: Chinese; English
• Published: 13.01.2023
• 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 provides a special-shaped dumbbell-shaped hard rock rotary excavating anti-deviation drill bit which comprises an anti-deviation belt ring, a connecting drill rod and a drilling drill bit. Wherein the drilling bit is of a cylindrical structure. The bottom of the connecting drill rod is connected with the drilling bit, and the central axis of the connecting drill rod coincides with the central axis of the drilling bit. The anti-inclination belt ring is arranged at the top end of the connecting drill rod and connected with the connecting drill rod, a plurality of alloy scrapers are arranged outside the anti-inclination belt ring, the central axis of the anti-inclination belt ring coincides with the central axis of the drilling bit, the bottom face of the anti-inclination belt ring is perpendicular to the connecting drill rod, and the diameter of the anti-inclination belt ring is larger than that of the drilling bit. The special-shaped dumbbell-shaped hard rock rotary excavating anti-inclinatio