Tapered Bit is perpendicular to the striking surface, and the drill rod is compacted (oblique hitting will easily cause... moreTapered Bit is perpendicular to the striking surface, and the drill rod is compacted (oblique hitting will easily cause the drill rod to break and damage the cylinder, and the empty hitting without compacting the drill rod will damage the cylinder).
For pinholes with cracks and karst caves, if the length of the karst cave is greater than the length of a single casing, a... moreFor pinholes with cracks and karst caves, if the length of the karst cave is greater than the length of a single casing, a double-layer Drill pipe should be run.
Drill pipe is a type of drilling accessory that cuts rocks into cores or grinds them into powder by diamond, which plays a... moreDrill pipe is a type of drilling accessory that cuts rocks into cores or grinds them into powder by diamond, which plays a major role in steamer drilling.
Drilling efficiency is not only related to the correct choice of cemented carbide grades, but also affected by many factors,... moreDrilling efficiency is not only related to the correct choice of cemented carbide grades, but also affected by many factors, mainly Tapered Bit's drill bit shape, rock hardness, blasthole diameter and blasthole depth compression, powder discharge method, air pressure, etc.