内置压缩式气密封检测工具的设计研究

Design and study of a built-in compressed gas seal testing tool

以Φ88.9 mm油管气密封检测为例,结合现有气密封检测工具,分析工具座封和工作两种状态下受力情况,在工具受力分析基础上,对气密封检测工具进行理论尺寸设计。运用ABAQUS软件建立胶筒的仿真模型,对三种橡胶材料进行本构模型优选和仿真模拟,得出三种橡胶材料、五组胶筒高度、六组胶筒内径的Mises应力和接触应力分布情况,优选确定了胶筒的制作材料、尺寸和内径,最终成功研制出四套不同尺寸的内置压缩式气密封检测工具。经现场8口井试验应用表明,内置压缩式气密封检测工具具有性能稳定、密封可靠、检测压力等级高、操作简便等特点,在油气井油套管螺纹连接气密封检测领域具有广阔的应用前景。

Taking the Φ88.9 mm oil pipe gas seal test as an example,combined with the existing airtight seal testing tool,analyzing the force situation under the two conditions of the tool sitting seal and working condition,the theoretical dimension design of the gas seal testing tool is carried out on the basis of the force analysis of the tool.The ABAQUS software is used to establish the simulation model of the rubber cylinder,and three kinds of terials are optimized and simulated.The Mises stress and contact stress distribution of the rubber materials,the height of the five groups of rubber tubes and the inside diameter of the six groups of rubber cylinders are obtained,and the material,size and inner diameter of the rubber cylinder are selected and finally,four sets of built-in compression type gas seal detection tools with different sizes were successfully developed.The test application of 8 wells shows that the built-in compression gas seal testing tool has the characteristics of stable performance,reliable seal,high detection pressure grade and simple operation.It has a broad application prospect in the field of oil and gas well casing thread connection gas seal detection.