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针对胜利油田胜坨地区在调整井钻井过程中时常发生地层漏失、注水造成的井涌等技术难题,在采用多种解决方式效果不佳的情况下,引入了一种新技术即柔性膨胀管技术,该技术通过液压或机械的方法使柔性套管膨胀,可以封隔水层和坍塌地层、保护产层,隔绝漏失层,解决同一裸眼井段不同压力系统的钻井问题。波纹柔性管相比于其他柔性膨胀管具有许多的优点,该技术在俄罗斯应用已经十分成熟,解决了上千口井的复杂问题。在胜利油田胜坨地区采用波纹柔性管技术实验了2口井,解决了水窜和漏失问题,取得了良好效果。
In view of the technical problems such as strata loss and well kick caused by water injection during the well drilling in Shengli Oilfield, a new technology, namely flexible expansion pipe technology, was introduced under the ineffective conditions of various solutions. This technology hydraulically or mechanically expands flexible sleeves to seal off water and collapsed formations, protect the pay zone, and isolate run-off from strata and solve the drilling problems of different pressure systems in the same open-hole section. Corrugated flexible pipe compared to other flexible expansion tube has many advantages, the technology in Russia has been very mature application, to solve the complex problems of thousands of wells. Two wells were tested in the Shengli Oilfield Shengtuo area by corrugated flexible pipe technology, which solved the water channeling and leakage problems and achieved good results.