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
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 compr...
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Main Authors | , , , , , |
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Format | Patent |
Language | Chinese English |
Published |
19.06.2020
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Subjects | |
Online Access | Get full text |
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Summary: | 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 |
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Bibliography: | Application Number: CN202010102130 |