外悬挂深水水下井口切割回收工艺现场应用
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摘要
水深800 m以内的井,在永久弃井时必须把水下井口头系统从泥线以下约4 m切割回收,这是永久弃井作业的关键一环。在介绍坐压旋转式切割工艺及工具在现场应用中存在问题的基础上,以MOST配套螺杆马达的动力切割回收工具为例,分析了外悬挂深水水下井口头系统切割回收工具的优点。同时以南海某口井为例,对外悬挂深水水下井口头系统切割回收工具进行了现场应用。现场应用结果表明:外悬挂深水水下井口头系统切割回收工艺技术解决了坐压旋转式切割工艺及工具的诸多问题,保证了切割回收工艺技术的安全性和有效性。所得结论可为我国深水套管切割技术的进一步发展提供参考。
For the offshore well with a water depth of less than 800 m,the subsea wellhead system must be cut and recovered approximately 4 m under the mud line when the well is permanently abandoned,which is a key part of the permanent well abandonment operation. The problems in the field application of the setting pressure rotating type cutting technology and tools are discussed. Taking the power cutting and retrieving tool of the MOST screw motor as an example,the advantages of the outer hanging deep-water subsea wellhead system cutting and retrieving tool are analyzed. This cutting and retrieving tool has been applied in a well in the South China Sea. The results show that the outer hanging deep-water subsea wellhead system cutting and retrieving technology addressed many shortcomings and problems of the setting pressure rotating cutting technology and tool,ensuring the safety and effectiveness of the cutting and recovery process technology. The conclusions can provide reference for further development of deepwater casing cutting technology in China.
For the offshore well with a water depth of less than 800 m,the subsea wellhead system must be cut and recovered approximately 4 m under the mud line when the well is permanently abandoned,which is a key part of the permanent well abandonment operation. The problems in the field application of the setting pressure rotating type cutting technology and tools are discussed. Taking the power cutting and retrieving tool of the MOST screw motor as an example,the advantages of the outer hanging deep-water subsea wellhead system cutting and retrieving tool are analyzed. This cutting and retrieving tool has been applied in a well in the South China Sea. The results show that the outer hanging deep-water subsea wellhead system cutting and retrieving technology addressed many shortcomings and problems of the setting pressure rotating cutting technology and tool,ensuring the safety and effectiveness of the cutting and recovery process technology. The conclusions can provide reference for further development of deepwater casing cutting technology in China.
引文
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[2]阳文学,姜清兆,汪顺文,等.深水弃井套管切割技术[J].石油钻采工艺,2015,37(1):132-134.YANG W X,JIANG Q Z,WANG S W,et al.Casing cutting technology for abandoned deepwater wells[J].Oil Drilling&Production Technology,2015,37(1):132-134.
[3]冯定,卢汉斌,夏成宇,等.深水弃井作业套管切断的判断方法[J].石油矿场机械,2015,44(5):83-86.FENG D,LU H B,XIA C Y,et al.Method for deep well abandonment operation to judge the cut casing[J].Oil Field Equipment,2015,44(5):83-86.
[4]陈建兵,王超,刘贵远,等.磨料射流切割套管技术研究及在海上弃井中的应用[J].石油钻探技术,2013,41(5):46-51.CHEN J B,WANG C,LIU G Y,et al.Casing cutting technology through abrasive water jet and its applications in offshore abandoned wells[J].Petroleum Drilling Techniques,2013,41(5):46-51.
[5]中国海洋石油总公司企业标准.海洋石油弃井规范:Q/HS 2025—2010[S].北京:中国海洋石油总公司,2011.China National Offshore Oil Corporation Enterprise Standard.Specification for offshore well abandonment:Q/HS 2025—2010[S].Beijing:China National Offshore Oil Corporation,2011.
[6]姜亮,朱培,李继勇.水力切割套管技术探讨与应用[J].科技与企业,2015(1):125,127.JIANG L,ZHU P,LI J Y.Discussion and application of hydraulic cutting casing technology[J].Technology and Enterprise,2015(1):125,127.
[7]陈瑶.深水水下井口装置切割回收工具设计研究[D].青岛:中国石油大学(华东),2014.CHEN Y.Design and research on cutting and retrieving tool of deepwater subsea wellhead system[D].Qingdao:China University of Petroleum(East China),2014.
[8]海洋钻井手册编审组.海洋钻井手册[M].北京:中国海洋石油总公司,1996.“Offshore Drilling Manual”Editorial Team.Offshore Drilling Manual[M].Beijing:China National Offshore Oil Corporation,Beijing,1996.
[9]张武辇,贾银鸽,张静,等.无隔水管深水井口系统切割回收工程化应用[J].海洋工程装备与技术,2014,1(2):119-128.ZHANG W N,JIA Y G,ZHANG J,et al.Engineering application of cutting and retrieving for riserless deepwater subsea wellhead system[J].Ocean Engineering Equipment and Technology,2014,1(2):119-128.