沧州盐矿古近系塑脆性地层取心钻头选型研究  

Study on coring bit selection for Paleogene plastic‑brittle strata in Cangzhou Salt Mine

作　　者：景龙[1,2] 李伟 JING Long;LI Wei(No.3 Geological Brigade of Hebei Geology and Mineral Exploration Bureau,Hengshui Hebei 053000,China;Hebei Institute of Geothermal Resources Development,Hengshui Hebei 053000,China;No.4 Geological Brigade of Hebei Geology and Mineral Exploration Bureau,Cangzhou Hebei 061000,China)

机构地区：[1]河北省地矿局第三水文工程地质大队,河北衡水053000 [2]河北省地热资源开发研究所,河北衡水053000 [3]河北省地矿局第四水文工程地质大队,河北沧州061000

出　　处：《钻探工程》2022年第6期71-78,共8页Drilling Engineering

基　　金：河北省地矿局科技项目“沧州深部大口径盐矿钻进技术研究”(编号:454-0601-YBN-MU6P)。

摘　　要：沧州盐矿普查项目完成了3眼勘探孔,钻探深度3000~3451 m,取心总长度3791 m,取心层段主要为古近系塑脆性岩石。根据钻进特性,针对工区弹塑性层段和脆性层段提出了钻头选型原则。结合施工实践,经过多次试验、改进,在累计使用的硬质合金、复合片、巴拉斯3类15种钻头中,通过典型钻头结构型式、碎岩机理以及使用效果进行综合分析,优选出H-4-Ⅱ、F-3、F-6型3种钻头,在古近系地层取心钻进中效率高、取心质量好,适合工区地质条件,建议推广应用。Three exploration boreholes have been completed in the Cangzhou Salt Mine general survey project,with the drilling depth ranging from 3000 to 3451m,and the total coring length of 3791m in Paleogene plastic‑brittle formation.Based on the drilling characteristics,the proper bit selection principle was determined for the elastic‑plastic interval and brittle interval in the work area.After several tests and improvements,15 kinds of bits belonging to three categories-carbide,PDC and Balas were used.Comprehensive analysis was carried out according to the bit structure,rock fragmentation mechanism and application effect,and three kinds of bits of H-4-Ⅱ,F-3 and F-6 were optimized.These bits had high efficiency and good coring quality when drilling in Paleogene strata,which are suitable for the geological conditions in the work area,and can be recommended to popularize and apply in this area.

关 键 词：古近系 塑脆性地层 取心钻头 硬质合金钻头 复合片钻头 

分 类 号：P634[天文地球—地质矿产勘探]