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钻柱冷冻塞技术在FOX-Z-ST井井控作业中的应用
断块油气田
2021年 28卷 第2期
阅读：125
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Title
Application of drill pipe freezing technology in well FOX-Z-ST well control operation
单位
中国石化集团国际石油勘探开发有限公司，北京 100029
Organization
nternational Petroleum Exploration & Developing Corporation, SINOPEC, Beijing 100029, China
摘要
在喀麦隆FOX￣Z￣ST井井控作业过程中，施工人员利用钻柱导热性能，向钻柱内泵入冷冻剂，钻柱外使用制冷剂静置后形成物理冷冻塞，冷冻塞作为有效的压力屏障，成功解决了FOX￣Z￣ST井井控作业过程中钻柱断开的难题。文中通过介绍喀麦隆FOX￣Z￣ST井实施钻柱冷冻塞的过程，分析了钻柱冷冻塞施工时需要注意的技术要素及解决方案。研究成果可为后续类似施工提供参考和借鉴。
Abstract
While a well control issue was encountered in well FOX-Z-ST in Cameroon, thermal conductivity of drill pipe was utilized by onsite operation people. Freeze agent was pumped inside drill pipe and the coolant was pooled around for several hours settling. A physical freezing plug as a barrier to isolate pressure below was then formed. The challenge for disconnecting the tool joint during well control process for well FOX-Z-ST was successfully demolished. This paper introduced the real drill pipe freezing operation process of the well and discussed the experience & lessons learnt from it. Key technical factors and solutions were also detailed for the drill pipe-freezing operation in this essay. It may become a reference for future similar on site drill pipe-freezing operations.
关键词：
钻柱冷冻塞;
井控;
FOX￣Z￣ST井;
喀麦隆;
Keywords:
drill pipe-freezing plug;
well control;
well FOX-Z-ST;
Cameroon;
DOI
10.6056/dkyqt202102023
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