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介绍了CQQT-Ⅲ型气井井下挂片腐蚀监测装置结构,现场在气井中的投放,打捞的方法,腐蚀产物的分析和腐蚀速率的计算,以苏里格气田X井为例,准确评价出气井井下腐蚀程度。该装置专门设计了悬挂配重和增加挂片安装数量的挂片定位短节,悬挂配重可以使监测装置在井下苛刻的环境中有效悬挂,挂片定位短节可放置30个挂片。该装置已在苏里格气田成功应用近40余井次,投放打捞成功率为100%,满足了苏里格气田对井下腐蚀监测的特殊要求,有较好的应用前景。
The structure of CQQT-Ⅲ underground coupon corrosion monitoring device, the way of putting it in gas well, the method of salvage, the analysis of corrosion products and the calculation of corrosion rate are introduced. Taking X well in Sulige gas field as an example, Downhole corrosion. The device is specially designed to suspend the counterweight and increase the number of the installation of the hanging piece. The hanging weight can effectively suspend the monitoring device in the downhole harsh environment, and the hanging piece can accommodate 30 pieces of the hanging piece. The device has successfully applied nearly 40 wells in the Sulige gas field with a success rate of 100%, which meets the special requirements for monitoring downhole corrosion in the Sulige gas field and has good application prospects.