黄河定向钻穿越事故分析

定向钻穿越河流是一种比较先进的施工方法，采用合适的钻进工艺，可以穿越许多类型的地层，有较宽的适用范围，但穿越的成功与否要受到许多客观条件的影响，如钻进工艺，泥浆性能与地质条件的适应性，操作人员的素质，设备能力的大小等，从某工程黄河穿越的多次受挫过程分析发现以上条件的重要性，据此提出了不同地层条件下所适合钻进工艺的建议。

Analysis to an accident in the Yellow River's directional drilling crossing engineering

Directional drilling is an advanced construction method in river crossing. Proper drilling process can be adopted in crossing of many types of formations, which has wider scope of application. But success or failure in crossing can be affected by many objective conditions, such as drilling process, adaptability of mud property and geologic setting, quality of operator, equipment capability, etc. Significance of the above conditions is found out from analysis on many failure processes in the Yellow River crossing engineering. Therefore puts forward a recommendation applicable for drilling engineering under different formation condition.