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三翼单环反循环钻头武汉地质勘察基础工程公司上海分公司陈如号泵吸反循环钻进是目前工程施工中应用最广的技术之一，这种工艺具有成孔效率高、孔底干净和孔径规则等优点。对于大口径施工，更能显示出其优越性。但钻头设计合理与否，则直接影响成孔速度和成孔质量。通过反...
Three-wing single-ring reverse circulation drill Wuhan Geological Prospecting Foundation Engineering Company Shanghai Branch Chen Ru No. Pump suction reverse circulation drilling is currently one of the most widely used engineering construction technology, this process has a hole into a high efficiency, clean bottom And aperture rules and other advantages. For large-diameter construction, more to show its superiority. However, the design of the drill bit is reasonable or not, it will directly affect the speed of hole formation and hole quality. Through the anti ...