嵩县大王沟钼矿区破碎地层金刚石绳索取心钻进实践

Practice of Diamond Wire-line Coring Drilling in Broken Formation of Dawanggou Molybdenum Mining Area in Song County

摘要:

针对河南省嵩县大王沟钼矿强烈蚀变、软硬不均、涌水漏失的复杂地层绳索取心钻进的难题，采用以套管为主、泥浆为辅的护壁措施，对钻探设备及工器具、金刚石钻头参数的选型进行了探讨，提出了腐植酸钾泥浆护壁和惰性材料堵漏的配方和配置方法，以及减小起下钻压力激动和抽吸对孔壁的破坏作用的措施，取得了较好的应用效果。

Abstract:

According to the difficulties of wire-line coring drilling in complex formation of Dawanggou molybdenum mine with intense alteration, uneven hardness and gushing leakage, the wall protection was adopted by casing first and slurry secondly. The discussion was made on the selection of drilling equipments and tools as well as diamond bit parameters determination; wall protection with K + humate-containing drilling mud and plugging with inert stuffing were put forward and tripping pressure surge and suction damage to the hole wall decreasing measures were used with good application effects.