长白矿区复杂地层多金属矿深孔施工技术

Deep Hole Construction Technology for Polymetallic Mine in Complex Formation of Changbai Mine Area

摘要:

长白多金属矿区地层复杂，深孔钻探难度极大，采用先进的钻孔结构以及采用绳索取心钻进,利用同径绳索取心钻杆做技术套管，同时选用PAB高性能无固相冲洗液和选择高端广谱钻头的钻探技术，成功完成了一个孔深1505.88 m的钻孔，创造了吉林省地矿局钻探深孔记录。着重介绍了该孔钻探施工技术措施。

Abstract:

Because of the complex formations, deep hole drilling is very difficult in Changbai polymetallic mine area. The advanced borehole structure and wire-line coring drilling were adopted; with wire-line coring pipe of the same diameter as the intermediate casing; high performance PAB solid-free flushing fluid and the drilling technology with high-level broad spectrum bit were selected. A borehole of 1505.88 m depth was fulfilled, which became the drilling depth record of Jilin Geology and Mineral Surveying and Exploring Bureau. The paper emphatically introduced the construction technology of this borehole drilling.