在套管参数一定时，套管响应与地层的响应的比值近似一个常数。
且节省材料、节约费用、使用安全，它主要用于对缆线端头起保护作用。
通过圆管和套管内流体的简单模拟，验证了计算流体力动力软件PHOENICS的准确性；
它主要是解决现有缆线端头密封的工序复杂等技术问题。
这对于正确判定工作量规使用，保证套管生产质量很有益处。
用途：扶正套管使套管在井眼内居中，使水泥环均匀，提高固井质量。
磁记忆与小波变换相结合的井下套管应力集中早期诊断方法
1·Finally, the conclusion is that the pulse pressure caused by vibrated water injection can not damage to casing pipe, cement sheath and formation.
最后得出结论——振动注水所产生的脉动压力不会对套管、水泥环及地层造成损坏。
2·In the process of sour gas reservoir development, hydrogen sulfide usually causes corrosions and damages in oil line, casing pipe and drilling apparatus.
含硫气田在开发过程中，由于硫化氢的出现，常常会出现油管、套管、钻井设备、钻井仪器等等腐蚀和损坏问题。
3·Adopting the method introduced in this paper to repair the damaged noble metal thermocouple protective casing pipe has such advantages as simple application, high efficiency, low cost, etc.
介绍了采用粘接方法修复损坏的旧金属热电偶保护套管，简易、方便、效果良好，且节约费用。
4·Finally, we suggested that the problem on stability of the bench mark may be settled in certain area by using the bench mark with a casing pipe buried in the proper depth of soil stratum.
最后指出，在某些地区，适当埋设深层套管水准标，可以解决水准标志的稳定性问题。
5·In case of the oil casing pipe taken place staggered fracture, there can not put down the instruments in the well, the explosion method is often to be used.
研究油井套管由于错断，无法使下井工具通过情况下，采用爆炸方法打通错断口。