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Appalachian盆地的油气生产已进入成熟的、水敏性油井开采阶段。许多油井已生产25年以上。大多数储层井己使用了40年甚至更长时间。这些井普遍都存在着以下问题──限制性油嘴、阀门或油管、它们阴碍了那些已腐蚀。有问题或不合适的井口装置以及套管顶部连接部件的维修和更换。常现方法是使用带有膨胀式封隔器的连续油管（CT），它穿过节流装置进入完好井下套管。以便在井口进行修井作业。这些工具不仅很昂贵，而且给旧套管带来稳定性和安全性问题。这里有一个可供选择的新方法、使用CT来充填交联聚合物段塞，以保证地层不受修井过程中用来隔离地层压力的压井液的伤害。
Oil and gas production in the Appalachian Basin has entered the mature, water-sensitive oil recovery stage. Many wells have been produced for over 25 years. Most reservoir wells have been in use for 40 years or more. Common problems in these wells are the following: Limiting choke, valves or tubing, which obscure those that have been corroded. Faulty or unsuitable wellhead assembly and repair and replacement of the connection components at the top of the casing. A common practice is to use a coiled tubing (CT) with an expanded packer that goes through a throttling device into a well casing. In order to workover at the wellhead. These tools are not only expensive but also bring stability and safety issues to the old bushing. There is an alternative method of using CT to fill the cross-linked polymer slugs to ensure that the formation is protected from killing fluids used to isolate formation pressure during workover.