钢粒钻进针对坚硬的岩层钻进,具有很多优点。但由于其本身工艺特点,在大裂隙、岩溶溶洞地层,这种施工方式受到了很大的限制。本文从生产实践出发,经过分析与尝试,采用控制输入井孔循环液量,将钢粒与粘土相结合,制成含钢粒的粘土球(钻粒),进行钢粒钻进,取得了满意的施工效果。 Steel grain drilling has many advantages for drilling hard rock formations. However, due to its own process characteristics, this kind of construction method has been greatly limited in large fractures and karst cave formations. In this paper, starting from the production practice, through the analysis and attempt to control the input amount of circulating fluid in the wellbore, the combination of steel and clay, made of steel ball containing clay (diamond), the steel grain drilling, and achieved satisfactory The construction effect.