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how to choose suitable horizontal directional drilling pilot drill bit …

PDC Bit full name is Polycrystalline Diamond Compact Bit,which is one of the most important material advances for oil well drilling tools in recent years.PDC bits are designed and manufactured in two structurally dissimilar types,Matrix Body PDC Bits & Steel Body PDC Bits.…

Rock Roller Bit is widely used in oilfields and ungroudwater well drilling. Compared with PDC oil bit and DTH bit, it has it's unique and irreplaceable working characteristics. …

DTH bit…