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无水钻进和无风钻进是工程地质在土层和软质岩层中常用的钻探方法之一。但是,在钻进中常发生烧钻、卡钻、抱钻。主要是因孔内碎屑难以取出所致。对此,我院试制成功了内螺旋片合金钻头。内螺旋片合金钻头是利用一般的合金钻头(不开水口)把螺旋片加在钻头体内,螺旋片在钻头内旋转360°,其结构见右图。工作时,将内螺旋片合金钻头直接装在岩芯管上,下入孔内。当钻具回转时,碎块、岩粉、松软土沿内螺旋片进入岩芯管内。提钻时,岩芯管内的
Waterless drilling and non-wind drilling are one of the commonly used drilling methods for engineering geology in soil and soft rock formations. However, drilling, sticking, and drilling are often involved in drilling. Mainly due to the difficulty of removing the debris inside the hole. In this regard, our hospital successfully produced a spiral internal alloy drill. Internal spiral alloy drill bits use a common alloy drill bit (without water opening) to add the spiral piece to the drill bit body. The spiral piece rotates 360° in the drill bit. Its structure is shown in the right figure. During work, the inner helical alloy drill bit is directly mounted on the core tube and is lowered into the hole. When the drilling tool rotates, pieces, rock dust, and soft soil enter the core tube along the spiral. When drilling, the core tube