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钻杆的折断会给钻探施工带来严重的影响。如果地层复杂，危害更大。因此，如何减少和消灭钻杆在孔内的折断是钻探生产中的重要课题。钻杆在钻孔的断裂情况按断裂位置分为两种：一种是属于中部断裂，一种为头部丝扣部位的断裂。钻杆丝扣部位的断裂，当热镦粗的工艺正常，其断裂的原因主要是原丝扣部位的结构不合理所造成。但是原丝扣结构有那些不足？如何改革？装配检验技术条件要达到什么样的要求？如果这些问题不搞清楚，就会造成加工上的困难，实际使用中不易收到理想的效果，为此，本文作一些分析和介绍。
Drill pipe breakage will have a serious impact on drilling construction. If the strata are complex, the hazard is even greater. Therefore, how to reduce and eliminate the breakage of the drill pipe in the hole is an important issue in drilling production. There are two types of fractures in the borehole drilled according to the fracture location: one is the central fracture, and the other is the fracture of the head threaded part. The fracture of the drill pipe threading part is normal and the reason for the fracture is mainly caused by the unreasonable structure of the original thread buckle part. But what are the shortcomings of the original thread buckle structure? How to reform? What are the requirements for assembly inspection technical conditions? If these issues are not clarified, it will cause difficulties in processing, and it will not be easy to receive ideal results in actual use. For this reason, this article gives some analysis and introduction.