膨胀式封隔器是一种可经过油管进行作业的工具。封隔器一旦通过油管,封隔器上的橡胶元件就可膨胀坐封在管壁上,然后便可在封隔器上、下方进行修井作业。膨胀式封隔器产生于40年代后期,50年代初它的第一代产品成功地应用在西得克萨斯州的一口裸眼完井的井中。盘管修井技术的兴起,又促进了膨胀封隔器的发展。膨胀式封隔器通过对层位封隔提高了作业效率和采油的经济效果。随着未来水平钻井的发展,油层评价 Expansion packer is a tool that can work through the tubing. Once the packer has passed through the tubing, the rubber components on the packer can be inflated and seated on the tube wall, and the workover can be done either above or below the packer. Expanded packers were produced in the late 1940s and the first generation of their products was successfully used in a hole-free well in West Texas in the early 1950s. The rise of the coiled tubing workover technique has also promoted the development of the expansion packer. Expandable packers improve operational efficiency and the economics of oil production by layer sealing. With the development of future horizontal drilling, reservoir evaluation