湖北磷矿复杂地层深孔钻探施工工艺

Construction Technique of Deep Hole Drilling in Complex Phosphate Rock

摘要:

介绍了湖北兴山磷矿复杂地层深孔钻探施工工艺。针对复杂地层合理选择了钻头和钻进工艺参数；对破碎孔段采用优质泥浆钻进后，下套管稳定孔壁；对坍塌、掉块严重的孔段采用水泥浆封孔固壁；同时合理选择了绳索取心钻具，利用XY-5型钻机，完成了复杂地层1930 m深孔钻探任务。

Abstract:

The paper presents the construction technology of deep hole drilling in complex strata in Xingshan phosphate mine of Hubei province. The bit and drilling technology parameters were properly chosen for drilling in the complex strata. High quality drilling fluid was used in fractured hole section drilling with case for hole wall stability, cementing was used in serious collapsing and block-falling sections and wire-line coring tools and XY-5 type driller were used to complete 1930 m deep hole in complex strata.