PDC肋骨钻头单动双管钻探工艺在铝土矿地层的应用

Application of Swivel Type Dual-tube Drilling Technology with PDC Reinforced Bit in Bauxite Formation

摘要:

结合铝土矿地层特点，分析探讨铝土矿地层钻探工艺，通过常规绳索取心钻探、普通双管钻探与PDC肋骨钻头单动双管钻探工艺理论探讨及现场试验对比，得出了在铝土矿地层钻进采用常规钻探方法常产生卡钻事故、钻探效率低的原因，同时验证了采用PDC肋骨钻头单动双管钻探能较好地解决粘附孔壁而卡钻的问题并提高了钻探效率。

Abstract:

According to the features of bauxite formation, analysis was made on the drilling technology. By the theoretical discussion on conventional wire-line coring drilling, general dual-tube drilling and swivel type dual-tube drilling with PDC reinforced bit and by the comparison of field tests, the causes of sticking failure with conventional drilling methods in bauxite formation and low drilling efficiency were found. It was proved that the sticking failure could be solved by swivel type dual-tube drilling with PDC reinforced bit and the drilling efficiency was improved.