甘肃西和大桥金矿区复杂地层钻探施工实践

Construction Practice of Drilling in Complex Formation of Gold Field in Gansu

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、埋钻等钻进难点，采用金刚石单动双管钻进工艺和聚丙烯酰胺不分散低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。

Abstract:

According to the difficulties of broken formation, fracture development, lost circulation, callapse, drill rod sticking and burying in Xihedaqiao gole field, diamond swivel type double tube drilling technology and borehole protection with polyacrylamide non-dispersive low solid washing fluid were adopted with several leakage control measures, good technical effects were received. The paper summed up the construction experience in complex formation of this gold field.