采用超声测厚仪、X-射线衍射仪、带能谱的扫描电镜和激光共聚焦扫描仪（LCSM）等对长庆油田起出的国产已服役3 a的连续速度管柱的耐蚀性进行了评价。结果表明：管柱无严重腐蚀壁厚减薄、无沟槽腐蚀，管柱井口管单面的最大腐蚀速率为0.032 mm/a、双面为0.064 mm/a，井底管单面最大腐蚀速率为0.077 mm/a、双面为0.154 mm/a，即国产连续速度管柱的耐蚀性良好。腐蚀产物是FeCO₃与氧化铁的混合物，连续速度管柱在原气井中的腐蚀为以二氧化碳和氧腐蚀为主。

The corrosion resistance of the coiled velocity pipe string serviced in Changqing oil field for 3 years was evaluated by ultrasonic thickness gauge, X-ray diffraction (XRD), scanning electron microscopy with energy spectrometer (EDS) and laser confocal scanning microscopy (LCSM). The results showed that there was no serious erosion of wall thickness and no groove corrosion in the entire column. The maximum corrosion rate of the tubular wellhead pipe was 0.032 mm/a on one side and 0.064 mm/a on both sides. The maximum corrosion rate of the bottom hole pipe was 0.077 mm/a on one side and 0.154 mm/a on both sides. The corrosion resistance of the domestic coiled velocity pipe string was good. The corrosion products was a mixture of FeCO₃ and iron oxide, and the corrosion of coiled velocity pipe string in original gas well was dominated by carbon dioxide and oxygen corrosion.