钻井扶正工具断裂失效分析及预防

Analysis and Prevention of Fracture Failures of Drilling Rigging Tools

通过对钻井扶正工具断裂事故进行调查,从断口形貌、材质成分、金相组织、力学性能、焊接组织、裂纹扩展机理等方面进行综合研究分析,结果表明:工具失效源于焊接部位出现的许多呈放射状的微裂纹,基体内部出现多处疲劳弧线,原材料存在明显的成分偏析和组织不均一性,使得材料性能降低等辅助原因,导致工具失效。通过对焊接工艺评审和优化改进,严控材料冶金和成型工艺等措施,解决了工具失效问题。

Through the study of fracture failures of drilling rigs.Comprehensive research and anal-ysis were carried out in terms of fracture morphology,material composition,metallurgical organ-ization,mechanical properties,welding structure,crack extension mechanism and other aspects.By re-examining and optimizing the welding process and strictly controlling the material metallur-gy and forming process,the problem of drilling tool failures was solved.