使用双喷嘴钻头,能够提高机械钻速。但在现场使用时发现,双喷嘴钻头刺水眼,掉喷嘴现象相当普遍,严重地影响了双喷嘴钻头的使用寿命。在钻头壳体(巴掌)之间钻孔形成水眼,作为泥浆的通道。喷射式钻头为了防止水眼被冲蚀,在水眼中装有硬质合金制的喷嘴。在使用中发现,三嘴喷钻头装有较大直径水眼的喷 With dual nozzle drills, you can increase ROP. However, when used in the field, it was found that the double-nozzle bit spiked the water and dropped the nozzle phenomenon is quite common, seriously affecting the service life of dual-nozzle bit. Drill holes between drill bit shells (slats) to form the water eye as a passage for the mud. Jet drills To prevent the water eye from being eroded, a carbide nozzle is provided in the water eye. Found in use, trinity nozzle equipped with a larger diameter spray eye spray