液氮冷冻暂堵设备工艺改进及应用
Technical Improvement and Application of Liquid Nitrogen Freezing System for Temporary Plugging
张红生 1黄召 2朱海峰 3邓文杨 4郭彪 1鲍宪 5张拓峥5
作者信息
- 1. 中海石油(中国)有限公司
- 2. 中海石油(中国)有限公司上海分公司
- 3. 中国海洋石油国际有限公司
- 4. 中海石油(中国)有限公司深圳分公司
- 5. 中海油能源发展股份有限公司工程技术分公司
- 折叠
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%.
Abstract
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 efficien-cy;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 manu-factured,which increased the freezing efficiency of the equipment by about 40%.
关键词
冷冻暂堵/井控应急/进气端/冷冻盒Key words
temporary plugging by freezing/well control emergency/gas inlets/feezer box引用本文复制引用
基金项目
中国海洋石油集团有限公司"十四五"重大科研项目(KJGG-2022-17-04)
中国海洋石油集团有限公司科研项目(KJZH-2024-1302)
出版年
2024
NETL
NSTL
万方数据