无隔水管钻井液返回管线对接接头设计与分析
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摘要
钻井液返回管线对接接头对无隔水管钻井技术具有重要意义,由于国内无隔水管钻井技术发展缓慢,钻井液返回管线对接接头的研发尚处于起步阶段。鉴于此,针对南海1 500 m作业水深无隔水管钻井系统,设计了钻井液返回管线对接接头;同时提出无隔水管钻井液返回管线张紧力计算公式,计算了返回管线对接接头的张紧力载荷,并利用ANSYS有限元分析软件分别从张紧力载荷与海流载荷2种受力工况进行对接接头的强度校核。分析结果表明:对接接头满足无隔水管钻井工艺要求,强度符合要求,结构安全可靠;随着钻井液密度的增大,返回管线内径越大,对接接头所承受的应力越大。所得结果可为无隔水管钻井技术关键设备的设计提供理论依据。
The docking joint for mud return line is of great significance to the riser-less drilling technology.Due to the slow development of domestic riser-less drilling technology,the development of mud return line docking joint is still in its infancy. A mud return line docking joint was designed for a 1 500 m riser-less drilling system in the South China Sea. The calculation formula of the tension force of the mud return line was proposed. The tension load of the docking joint of the mud return line was calculated. The ANSYS finite element analysis software was used to conduct stress check of the docking joint at two kinds of stress conditions: tension load and sea current load. The results showed that the docking joint meets the requirements of the riser-less drilling process with the sound strength and safe and reliable structure. With the increase of the mud density,the larger the inner diameter of the mud return line is,and the higher the stress on the docking joint becomes. The study results can provide a theoretical basis for the design of key equipment of riser-less drilling technology.
The docking joint for mud return line is of great significance to the riser-less drilling technology.Due to the slow development of domestic riser-less drilling technology,the development of mud return line docking joint is still in its infancy. A mud return line docking joint was designed for a 1 500 m riser-less drilling system in the South China Sea. The calculation formula of the tension force of the mud return line was proposed. The tension load of the docking joint of the mud return line was calculated. The ANSYS finite element analysis software was used to conduct stress check of the docking joint at two kinds of stress conditions: tension load and sea current load. The results showed that the docking joint meets the requirements of the riser-less drilling process with the sound strength and safe and reliable structure. With the increase of the mud density,the larger the inner diameter of the mud return line is,and the higher the stress on the docking joint becomes. The study results can provide a theoretical basis for the design of key equipment of riser-less drilling technology.
引文
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[3]孙宝江,张振楠.南海深水钻井完井主要挑战与对策[J].石油钻探技术,2015,43(4):1-7.SUN B J,ZHANG Z N.Challenges and countermeasures for the drilling and completion of deepwater wells in the South China Sea[J].Petroleum Drilling Techniques,2015,43(4):1-7.
[4]殷志明.新型深水双梯度钻井系统原理、方法及应用研究[D].青岛:中国石油大学,2007.YIN Z M.New dual-gradient deepwater drilling systemsprinciple,method and application[D].Qingdao:China University of Petroleum,2007.
[5]HANNEGAN D,STAVE R.The time has come to develop riserless mud recovery technology’s deepwatercapabilities[J].Drilling Contractor,2006,62(5):50-54.
[6]周昌静,陈国明,刘杰,等.无隔水管钻井泥浆举升系统参数计算[J].石油钻采工艺,2011,33(1):42-44.ZHOU C J,CHEN G M,LIU J,et al.Parametric computation of mudlift system in riserless drilling[J].Oil Drilling&Production Technology,2011,33(1):42-44.
[7]高本金,陈国明,殷志明,等.深水无隔水管钻井液回收钻井技术[J].石油钻采工艺,2009,31(2):44-47.GAO B J,CHEN G M,YIN Z M,et al.Deepwater riserless mud recovery drilling technology[J].Oil Drilling&Production Technology,2009,31(2):44-47.
[8]彭齐,樊洪海,纪荣艺,等.无隔水管钻井技术临界排量分析[J].石油机械,2016,44(2):48-52.PENG Q,FAN H H,JI R Y,et al.Analysis on the critical displacement of riserless drilling technology[J].China Petroleum Machinery,2016,44(2):48-52.
[9]刘秀全,李家仪,任克忍,等.基于反冲响应的深水钻井隔水管张紧力计算方法[J].石油钻探技术,2016,44(4):47-51.LIU X Q,LI J Y,REN K R,et al.A calculation method for the top tension of deepwater drilling risers based on recoil response[J].Petroleum Drilling Techniques,2016,44(4):47-51.
[10]杨进,孟炜,姚梦彪,等.深水钻井隔水管顶张力计算方法[J].石油勘探与开发,2015,42(1):107-110.YANG J,MENG W,YAO M B,et al.Calculation method of riser top tension in deep water drilling[J].Petroleum Exploration and Development,2015,42(1):107-110.
[11]李明,陶正梁,姚海田.基于ANSYS的平台波流载荷下动力分析及疲劳分析[J].石油钻探技术,2005,33(3):45-48.LI M,TAO Z L,YAO H T.The dynamic and fatigue analysis for offshore platform under the wave and current forces by ANSYS[J].Petroleum Drilling Techniques,2005,33(3):45-48.