摘要
液氮冷冻暂堵技术是一种极具优势的井口带压处置技术。为了提高井控抢险中的井口处置效率,文章总结了影响液氮冷冻暂堵设备冷冻效率的工艺因素,并基于设备工艺特点,采用ANSYS-Fluent流体仿真软件对进气端数量、进气端孔径、冷冻盒直径3个最具优化潜力的工艺参数进行了数值模拟分析,通过分析发现,适当增加进气端数量可以有效提高冷冻效率;增大进气端孔径对提高冷冻效率有一定的增益;缩小冷冻盒直径主要提高的是局部冷冻效率,对管柱整体冷冻效率的提高影响不大。依据所得结论设计加工的制冷剂注入管,将设备的冷冻效率提高了约40%。
Liquid nitrogen freezing technology is a highly advantageous wellhead disposal technology.In order to improve the efficiency of wellhead disposal in well control rescue,this article summarizes the technology factors that affect the freezing efficiency of the freezing system with liquid nitrogen,and uses the ANSYS-Fluent fluid simulation software to numerically simulate and analyze the three most promising parameters,namely the number of inlets,the inlet diameter,and the freezer box diameter,based on the characteristics of equipment technology.It can be concluded that:increasing the number of inlets appropriately can effectively improve the freezing efficiency;increasing the inlet diameter has a certain benefits in improving the freezing efficiency;reducing the freezer box diameter mainly improves the local freezing efficiency,but has little impact on improving the overall freezing efficiency of the drill pipe.Based on the conclusions obtained,a refrigerant injection tube was designed and manufactured,which increased the freezing efficiency of the equipment by about 40%.
作者
张红生
黄召
朱海峰
邓文杨
郭彪
鲍宪
张拓峥
ZHANG Hongsheng;HUANG Zhao;ZHU Haifeng;DENG Wenyang;GUO Biao;BAO Xian;ZHANG Tuozheng(CNOOC(China)Limited,Beijing 100010,China;CNOOC(China)Co.,Ltd.,Shanghai Branch,Shanghai 200030,China;CNOOC International Limited,Beijing 100028,China;CNOOC(China)Co.,Ltd.,Shenzhen Branch,Shenzhen 518067,China;CNOOC EnerTech-Drilling&Production Co.,Tianjing 300452,China)
出处
《钻采工艺》
CAS
北大核心
2024年第4期74-79,共6页
Drilling & Production Technology
基金
中国海洋石油集团有限公司“十四五”重大科研项目“海上钻井井控风险预警与应急关键技术及装备”(编号:KJGG-2022-17-04)
中国海洋石油集团有限公司科研项目“浅水水下作业环境井喷失控应急处置技术及工艺研究”(编号:KJZH-2024-1302)。
关键词
冷冻暂堵
井控应急
进气端
冷冻盒
temporary plugging by freezing
well control emergency
gas inlets
feezer box
