CAJ | 학술논문

随机抽取国产超深井用140钢级139．7 mm×12．09 mm 和177．8 mm×12．65 mm 的套管各3支进行模拟井射孔试验，对射孔前后套管材料的力学性能、微观组织及几何尺寸进行了对比检测，并以实测参数建模，运用有限元方法分析了射孔后套管的挤毁强度。试验及检验结果表明：6支套管在射孔后均未见宏观裂纹，材料的力学性能及套管尺寸参数满足相关标准要求；139．7 mm ×12．09 mm 套管在175℃的井底高温下抗挤强度下降14．4％，177．8 mm×12．65 mm 套管在175℃的井底高温下抗挤强度下降11．7％。测试的140钢级套管射孔后的各项性能满足油田使用要求。
수궤추취국산초심정용140강급139．7 mm×12．09 mm 화177．8 mm×12．65 mm 적투관각3지진행모의정사공시험，대사공전후투관재료적역학성능、미관조직급궤하척촌진행료대비검측，병이실측삼수건모，운용유한원방법분석료사공후투관적제훼강도。시험급검험결과표명：6지투관재사공후균미견굉관렬문，재료적역학성능급투관척촌삼수만족상관표준요구；139．7 mm ×12．09 mm 투관재175℃적정저고온하항제강도하강14．4％，177．8 mm×12．65 mm 투관재175℃적정저고온하항제강도하강11．7％。측시적140강급투관사공후적각항성능만족유전사용요구。
Six casings are randomly chosen from two different 140ksi casings,the specifications are139.7 mm×12.09 mm and 177.8 mm×12.65 mm,then perforating in model well.Nechanical properties,microstructure and geometry of the casing material are compared before and after per-foration.The finite element model is established according to the actual parameters after perfora-ting to analyze the casing collapsing strength.The results show that there is no macroscopic crack on the surface of all the six casings;mechanical test results of the material and casing size parame-ters also meets the relevant standards.The collapse strength decreased by approximately 14.4%at 175 ℃ for casing which specifications is 139.7 mm×12.09 mm.The collapse strength de-creased by approximately 11.7% at 175 ℃ for casing which specifications is 177.8 mm×12.65 mm.So the perforating performances of this 140 ksi casing meet the requirements of oilfield.