凤太矿田复杂地层大口径金刚石绳索取心钻进工艺

Drilling Technology of Large Diameter Diamond Wire-line Coring Drilling in Complex Formation of Fengtai Ore Field

介绍了大口径金刚石绳索取心钻具在陕西凤太矿田小梨园金矿区复杂地层中的应用情况及施工工艺。针对以前在此矿区施工时遇到的孔内坍塌、掉块、事故多、效率低、采心困难、施工质量差等问题,从钻进方法、钻孔结构、护孔方法、钻进参数、润滑减阻、钻具级配等方面采取了有效的技术措施,提高了钻探施工效率和工程质量。

The paper introduced the application of large diameter diamond wire-line coring drilling tool in complex formation of Fengtai ore field and the construction process.According to the problems of collapsing and block falling in borehole,low construction efficiency,difficult coring and low quality of construction,with the effective measures of drilling method,borehole structure,borehole protection,drilling parameter,reducing resistance by lubrication and drilling tool grading,the efficiency of drilling construction and engineering quality were improved.