河南省南坪矿区多金属矿复杂地层钻探施工方法

Drilling Construction Method for Polymetallic Deposit in Complex Formation of Nanping Mining Area

摘要:

针对南坪矿区地层破碎、胶结性差、钻进漏失及坍塌非常严重、多个钻孔无法钻至设计深度等难题，从冲洗液选择和简化钻孔结构、改进钻进工艺方面进行了大胆尝试，经ZK474、ZK477两个报废钻孔移位后重新施工，一举获得了成功，实现了钻进技术的突破性进展，技术经济效益实现了跨越式提高。重点介绍了钻孔护壁堵漏技术措施。

Abstract:

There were difficulties of broken formation, poor cementation, circulation lost and collapsing in Nanping mining area, and several boreholes could not reach the designed depth. By attempts of washing fluid selection, borehole structure simplification and drilling technology improvement, the scrap ZK474 and ZK477 were displaced and reconstructed with success. The paper mainly introduced the wall protection and leakage control measures.