CAJ | 학술논문

为更好了解气井内服役后速度管柱的性能，起出了某气井内服役3年的速度管柱，分别截取井口位置及井底位置管段，进行了外观、壁厚、金相和力学性能等检测。检测结果表明：该井况下的速度管柱经过3年服役后，管体为均匀腐蚀，焊缝性能无劣化，管样拉伸性能、压扁、扩口、静水压试验仍满足API SPEC 5ST标准要求，管样的疲劳性能也无明显降低。表明在该井况环境下国产速度管柱经过3年服役后，管体性能仍能满足继续服役的要求。
위경호료해기정내복역후속도관주적성능，기출료모기정내복역3년적속도관주，분별절취정구위치급정저위치관단，진행료외관、벽후、금상화역학성능등검측。검측결과표명：해정황하적속도관주경과3년복역후，관체위균균부식，한봉성능무열화，관양랍신성능、압편、확구、정수압시험잉만족API SPEC 5ST표준요구，관양적피로성능야무명현강저。표명재해정황배경하국산속도관주경과3년복역후，관체성능잉능만족계속복역적요구。
In order to better understand the velocity string performance in the gas well after service, the velocity string in a gas well served for 3 years was pulled out. It sampled from wellhead position and bottom location respectively to carry out performance tests, including appearance, wall thickness, metallographic, mechanical test, etc. The results showed that the velocity string after 3 year service, the pipe body was uniform corrosion, the weld properties were without deterioration. The tensile performance, flattening, expanding and hydrostatic test of sample pipe can still satisfy the requirements of API SPEC 5ST standard, and the fatigue performance did not decrease obviously. It indicated that under this well condition the velocity string after 3 years of service, the performance of pipe body can still meet the requirements of continuous service.