pack-off sealing area
... packoff preventers 封隔防护设备 pack-off sealing area 封隔密封区 packoff shoe 封隔套管鞋 ...
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在新疆和四川等探区，深井超深井压裂施工导致压裂管柱失效断裂，封隔器密封胶筒失效频率较高。
In the Sichuan and Xinjiang exploration area, fracturing in the deep or ultra deep Wells frequently results in the strings' breakage and the packer seal's malfunction.
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