而膨胀式封隔器的膨胀则是通过泵送流体进入囊状物，与气球大约同样的方式，但是比气球具有更坚固的结构。
The expansion of the latter is accomplished by pumping a fluid into a bladder, in much the same fashion as a balloon, but having more robust construction.
封隔器两种最常见的形式是生产封隔器或者测试封隔器和膨胀式封隔器。
The two most common forms are the production or test packer and the inflatable packer.
生产封隔器的膨胀可能通过挤压位于两个盘子之间的弹性部件(有些象汽车轮胎形状)来完成，迫使侧边向外膨胀。
The expansion of the former may be accomplished by squeezing the elastomeric elements (somewhat doughnut shaped) between two plates, forcing the sides to bulge outward.
应用推荐