钢管2025，Vol.54Issue(1)：68-74,7.DOI:10.19938/j.steelpipe.1001-2311.2025.1.68.74
Φ88.9 mm×6.45 mm 110S某油管接箍台肩变形原因分析
Analysis of Deformation Failure of Φ88.9 mm×6.45 mm 110S Tubing Coupling Shoulder
童亮 1吕庆钢 1王治国 1李新荣 2周鹏成 1褚清琳 1姬丙寅2
作者信息
- 1. 中国石油化工股份有限公司西北油田分公司,新疆 轮台 841600
- 2. 西安三维应力工程技术有限公司,陕西 西安 710075
- 折叠
摘要
Abstract
The causes for the deformation failure of the coupling shoulder of the Φ88.9 mm×6.45 mm 110S tubing is analyzed by means of macro-morphology inspection,material performance test,micro-morphology analysis of the sealing surface and the shoulder surface,and over-torsion test.And the working torque of the failed tube body is calculated by a mathematical model.The results show that the failure accident is due to the excessive working torque applied to the tubing during the stuck-releasing and string-releasing operations,which makes the shoulder surface of the coupling yielded by over torsion.In addition,the down hole temperature of the failed tubing coupling is above 100℃,which in turn reduces the yield strength of the tubing coupling material.At the same time,the complicated down hole stress condition of the tu-bing and the possible spiral buckling further aggravate the yield of the coupling shoulder surface,thus inevitably leading to the deformation failure of the coupling shoulder.关键词
油管/接箍台肩/变形/工况扭矩/过扭屈服/温度Key words
tubing/coupling shoulder/deformation/working torque/over torque-yield/temperature引用本文复制引用
童亮,吕庆钢,王治国,李新荣,周鹏成,褚清琳,姬丙寅..Φ88.9 mm×6.45 mm 110S某油管接箍台肩变形原因分析[J].钢管,2025,54(1):68-74,7.
