The unspecified pitting corrosion phenomenon of old well casing in Lamadian oilfield resulted in lack of accuracy of current safety evaluation method based on uniform corrosion and circular pit corrosion.To improving the safety evaluation accuracy of old well,this re-search establishes the residual strength prediction model of casing with corrosion defects through tensile test of specimens with simulated cor-rosion defects,finite element analysis and casing strength calculating formula from SY/T 5724.This model can realize the residual strength calculation of casing with corrosion defects of any shape and size,which provides the data for old well residual life evaluation and guides the residual strength prediction of old wells in oilfield.
关键词
套管/腐蚀缺陷/数值模拟/剩余强度/预测模型
Key words
casing/corrosion defect/numeral simulation/residual strength/prediction model
维普
万方数据