It is used for reamer drilling after the pilot hole of directional long drilling is formed. It is suitable for the drilling of soft-medium hard (f≤8) formations.Spiral blade airfoil structure design, layered staggered tooth arrangement, high hole expansion efficiency, long service life, suitable for rock hole reaming drilling; flexible configuration of pilot head, reasonable selection according to formation nature and construction process.
[Common specification]
φ96/120mm,φ96/153mm,φ96/220mm,φ120/153mm,φ133/168mm,φ168/215mm













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