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首页> 外文期刊>Engineering failure analysis >Corrosion failure analysis of high strength grade super 13Cr-110 tubing string
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Corrosion failure analysis of high strength grade super 13Cr-110 tubing string

机译：高强度等级超级13Cr-110油管柱腐蚀失效分析

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The main reasons for corrosion failure of super 13Cr-110 tubing and couplings have been proposed based on the analysis techniques of Optical Microscopy (OM), Scanning Electron Microscope (SEM), Energy Dispersive Spectrometer (EDS) and X-ray Diffraction (XRD). The results show that the composition, structure and mechanical properties of the tubing and the coupling were all in accordance with the corresponding parameter requirements of API Spec 5CT standards. Furthermore, corrosion occurring in the inner wall of joint was caused by the combined impacts of CO_2 corrosion, acid corrosion, erosion corrosion, and crevice corrosion, meanwhile, the synergistic effects of crevice corrosion, and sulfate-reducing bacteria (SRB) corrosion resulted in corrosion occurring in the outer wall of the tubing and the coupling. Finally, to check the quality of the tubing string before well completion, increase torque, install a centralizer, and add bactericide and inhibitor were advised to prevent the types of corrosion failure from taking place.
机译：基于光学显微镜（OM），扫描电子显微镜（SEM），能量色散光谱仪（EDS）和X射线衍射（XRD）的分析技术，提出了超级13Cr-110油管和接头腐蚀失效的主要原因。 。结果表明，油管和接头的组成，结构和力学性能均符合API Spec 5CT标准的相应参数要求。此外，在接头内壁发生的腐蚀是由CO_2腐蚀，酸腐蚀，腐蚀腐蚀和缝隙腐蚀的综合影响引起的，同时，缝隙腐蚀和硫酸盐还原细菌（SRB）腐蚀的协同作用导致了腐蚀。管道和接头的外壁发生腐蚀。最后，为了在完井前检查油管柱的质量，建议增加扭矩，安装扶正器，并建议添加杀菌剂和抑制剂以防止发生腐蚀故障。

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