S135钻杆管体刺穿失效分析

发布时间：2018-04-13 07:00

本文选题：S钻杆 + 腐蚀　；参考：《热加工工艺》2015年22期

【摘要】：通过宏观分析及材料理化性能分析测试,并结合断面微观分析,对某S135钻杆管体刺穿失效原因进行了分析。结果表明:钻杆刺穿失效的主要原因是热处理工艺不当,使得钻杆外表面形成脱碳层,降低了其力学性能,在钻井过程中复杂的交变应力载荷作用下,钻杆表面腐蚀坑底部首先形成微裂纹并迅速扩展,最终导致钻杆发生早期疲劳失效。
[Abstract]:Based on macroscopic analysis, physical and chemical properties analysis of materials and microanalysis of cross section, the causes of piercing failure of a S135 drill pipe body are analyzed.The results show that the main reason for the failure of drill pipe piercing is the improper heat treatment technology, which results in the formation of decarburized layer on the outer surface of the drill pipe, which reduces its mechanical properties, and under the action of complex alternating stress load during drilling.Microcracks are formed at the bottom of the corrosion pit on the surface of the drill pipe, which leads to the early fatigue failure of the drill pipe.
【作者单位】：中国石油大学(华东)机电工程学院;中国石油集团石油管工程技术研究院石油管工程重点实验室;
【基金】：石油管工程技术研究院课题(TGRI-2014-YK-03) 中国石油天然气集团公司科学研究与技术开发项目(2011A-4208)
【分类号】：TE921.2;TG115

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