Large-diameter reverse circulation drilling wing-shaped drill bit with multiple slag suction ports and application method of large-diameter reverse circulation drilling wing-shaped drill bit

• Main Authors: LI XIONGWEI, SHI WEICHENG, LI SHUJIN, SHI GUICAI, DAI GUOZHONG, LI PENGBO
• Format: Patent
• Language: Chinese; English
• Published: 19.06.2020
• 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 invention discloses a large-diameter reverse circulation drilling wing-shaped drill bit with multiple slag suction ports and an application method of the large-diameter reverse circulation drilling wing-shaped drill bit. The large-diameter reverse circulation drilling wing-shaped drill bit comprises a flange plate, a drill core pipe, reaming wing plates, slag suction pipes, hard alloy blocks,pilot hole wing plates, a sealing steel plate, a wing plate connecting belt and the like; the sealing steel plate is fixed to the bottom of the drill core pipe; the three or four pilot hole wing plates are arranged below the sealing steel plate; the three or four reaming wing plates are arranged at the side wall of the drill core pipe; the slag suction pipes are arranged between the two adjacent reaming wing plates at the middle lower part of the drill core plate; and the hard alloy blocks are embedded in the rock crushing bottom surfaces and rock crushing side surfaces of the pilot hole wingplates and the reaming win