The using packers in oilfields have complex construction. Packer setting and releasing need for certain well conditions. Some problems exist in field application.
油田上目前常用的几种封隔器结构比较复杂，尘封和解封需要一定条件，对井况有特定要求，在实际应用中存在着一些问题。
According to the casing strings of different sizes, converting zone technology including chemical plugging and packer setting is matched during the process of selective zone production.
针对不同尺寸的套管完井，在侧钻井分层开采的过程中的配套了封堵和卡封等配套的改层工艺。
This kind of packer overcomes many disadvantages of the previous ones, such as difficulty in operation, and high possibility of not setting and not releasing.
它的研制与成功应用，克服了原来多种热采封隔器的缺点，如操作困难，不座封和不解封的几率较高等。
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