Reamer bit and rotary drilling rig

• Main Authors: AN GUIPING, DONG SHUANGXI
• Format: Patent
• Language: Chinese; English
• Published: 26.07.2022
• 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 reamer bit and a rotary drilling rig. The reamer bit comprises a first connecting assembly, a second connecting assembly, a first cutting assembly and a second cutting assembly. When the reamer bit is used, the drill rod drives the second connecting assembly to slide downwards along the first connecting assembly, the second end of the first cutting assembly rotates outwards relative to the first connecting assembly, the second end of the second cutting assembly rotates outwards relative to the second connecting assembly, and the first cutting assembly inclines downwards from outside to inside. The second cutting assembly inclines downwards from inside to outside to form a structure with the wide middle and the two narrow ends, the first cutting assembly and the second cutting assembly make contact with a pile hole soil body, the first cutting assembly and the second cutting assembly cut the surrounding soil body to form a reamed hole, and the upper portion and the lower portion of