甘肃西和大桥金矿区复杂地层钻探技术

Drilling Technology in the Complex Formation of a Gold Mine

摘要:

针对甘肃西和大桥金矿区地层破碎、裂隙发育，漏失、坍塌、卡钻、埋钻等难点，采用金刚石绳索取心钻进工艺和聚丙烯酰胺不分散无固相冲洗液护孔技术，并采用多种堵漏措施，取得了较好的技术效果。总结了该矿区复杂地层钻探施工的经验，并提出今后在复杂地层中钻探施工减少停待及事故时间、提高钻探效率等的建议。

Abstract:

Diamond wire-line coring drilling and borehole protection by polyacrylamide non-dispersible solid-free fluid were used with several leakage control measures to deal with formation breaking, fracture development, leakage, collapsing, drill rod sticking and burying in Xihedaqiao gold mine of Gansu. The paper summed up the experience of drilling construction in this complex formation and put forward suggestions on reducing non-drilling time and improving drilling efficiency.