封隔器上的卡瓦锚定后起到支撑封隔器、锁定胶皮筒的作用，其性能好坏直接影响到油井的产量和生产安全。
The slips in the packer is for supporting packer and for locking rubber after anchoring. The capability of the slips influences directly on oil well yield and productive safety.
推导出了管柱在井中自重伸长的简化计算式，上提加压式封隔器坐封高度及通常情况下坐封高度的简化计算式。
Formulae strict and simplified including both describing pipe string gravitation elongate in the wellbore and expressing excluding height of take up packers are derived.
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。
The using packers in oilfields have complex construction. Packer setting and releasing need for certain well conditions. Some problems exist in field application.
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