Casing impairment leads to loss of pressure integrity, pinching of production tubing, even an inability to lower workover tools.

套管损坏会导致压力完整性破坏、生产油管磨损，甚至无法下入修井工具。

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In workover operation, it was very difficult to carry out "Well control" owing to tubing string's being seriously corroded, bored and ruptured.

气井修井作业中，常常遇到油管柱断掉、穿孔、腐蚀等严重问题，使修井作业中“压井”非常困难。

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With the increasing demand of the lateral drilling and slim hole drilling, the coiled tubing (CT) operating technique will play a great role in horizontal well drilling, well workover and completion.

随着我国侧钻井和小井眼钻井需求的不断增加，连续油管作业技术在我国水平井钻井、修井及完井作业中将会发挥巨大作用。

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