膨胀套管润滑措施分析

对膨胀套管作业过程中膨胀工具与套管内壁间的摩擦与润滑问题进行了研究。从理论上对膨胀套管作业的摩擦与润滑方法进行了系统的分析阐述,并对采取固态磷化润滑膜的润滑效果进行了实物试验,与普通润滑方法的润滑效果进行了对比。结果显示,采用固态磷化膜润滑具有明显的润滑效果,降低了膨胀压力,并且使膨胀过程更加稳定,膨胀后的套管尺寸精度更加均整。最终分析认为,采取固态磷化润滑膜是膨胀套管作业中简单有效且低成本的润滑方法,可以用于实际生产。

Analysis of lubrication measures for expandable casing

The friction and lubrication between the expandable tools and the inner wall of the casing during the operation of expandable casing are studied,and the friction and the lubrication method are analyzed theoretically in a systematic way.The lubrication effect of solid phosphatized lubricating film is tested and compared with that of the ordinary lubricating method.The results show that the lubrication effect of the solid phosphatized lubricating film is obvious with reduced expansion pressure,more stable expansion and more uniform accuracy of size of expanded casing.Therefore,it is thought to be a simple,effective and low-cost lubricating method which can be put into field use.