复合月牙形磨损套管剩余强度研究  

Study on Residual Strength of Composite Crescent Worn Casing

作　　者：幸雪松 武治强 张星坤 黄文君[2] Xing Xuesong;Wu Zhiqiang;Zhang Xingkun;Huang Wenjun(CNOOC Research Institute Co.,Ltd.;MOE Key Laboratory of Petroleum Engineering,China University of Petroleum(Beijing))

机构地区：[1]中海油研究总院有限责任公司 [2]中国石油大学(北京)石油工程教育部重点实验室

出　　处：《石油机械》2022年第11期126-132,共7页China Petroleum Machinery

基　　金：国家自然科学基金创新研究群体项目“复杂油气井钻井与完井基础研究”(51821092);中海石油(中国)有限公司项目“恩平18-6油田/番禺19-1油田联合开发钻完井基本设计”(2021BD-10-2)。

摘　　要：关于套管剩余强度的研究,主要集中于无磨损套管或者单月牙磨损套管,未充分研究复合月牙磨损形状对套管剩余强度的影响规律。为此,开展了单月牙磨损与双月牙磨损套管剩余强度的室内试验,建立了套管失效的判断准则,计算了不同缺陷形式下套管剩余强度。研究结果表明:磨损深度对于套管剩余强度的影响最敏感,磨损深度的增加使套管抗内压、抗外挤的强度均减小;次磨损槽对抗内压强度影响较小,对抗外挤强度影响明显。研究成果可为油气井作业优化与安全控制提供参考。Previous studies on the casing residual strength mainly focus on unworn casings or single crescent worn casings,but the influence of composite crescent worn shape on the casing residual strength was not fully studied.Therefore,the laboratory tests of casing residual strength with single crescent wear and double crescent wear were carried out,the judgment criteria of casing failure were established,and the casing residual strength with different wear patterns was calculated.The results show that the wearing depth has the most influence on the casing residual strength,and the increased wearing depth reduces the casing strength against internal falling and external pressure.The secondary wear groove has little influence on the internal pressure strength,but it has obvious influence on the external falling strength.The study results provide reference for the operation optimization and safety control of oil and gas wells.

关 键 词：套管磨损 复合磨损 月牙形磨损 剩余强度 失效准则 

分 类 号：TE931[石油与天然气工程—石油机械设备]