普通PDC钻头在中硬岩层中具有较好的钻进性能,而在吐哈油田鄯勒块,西山窑地层具有高硬度、高研磨性等特点,PDC钻头机械钻速低、单只钻头进尺少、耗时多,制约了PDC钻头的应用。该地层采用过特制的PDC钻头、复合钻井、扁齿牙轮钻头等多项新技术,但技术经济效益不甚明显。本文通过对岩心资料的分析,有针对性的对PDC钻头进行冠部形状及剖面设计,布齿设计,切削齿后倾角设计,现场试验证明具备较好效果。 Ordinary PDC drill bit has better drilling performance in medium and hard rock formations. However, in the Tuha block of Tuha oilfield, the Xishan kiln formation is characterized by high hardness and high abrasiveness. The PDC bit has low penetration rate and low drilling rate , Time-consuming, restricted the application of PDC bit. The formation of a special PDC bit, composite drilling, flat tooth cone bit and many other new technologies, but not obvious technical and economic benefits. In this paper, through the analysis of core data, the design of crown shape and profile of PDC bit, cloth design and cutting tooth inclination design are pointed out. The field test proves that it has good effect.