统计分析表明,陕北富县探区频繁发生钻具失效的主要原因是钻具在井下承受的交变应力较大,从钻具优选、钻压和转速匹配、钻井液性能等方面分析了该地区造成钻具失效的原因,以期在今后的施工中减少钻具失效事故的发生。并以直井和水平井为例,介绍了钻具失效事故的处理与预防,对今后钻井施工有一定的借鉴作用。 The statistical analysis shows that the main reason for the frequent failure of drilling tools in the exploration area of ​​Fuxian County in northern Shaanxi is that the alternating stress to be borne by the drilling tools is relatively large. From the aspects of the optimization of drilling tools, the match of weight-on-bit and speed, the performance of drilling fluid, In the future, the cause of the failure of drilling tools is expected to reduce the occurrence of drilling failure. In the case of vertical wells and horizontal wells, the handling and prevention of drilling failure are introduced, which will be of reference for future drilling.