The problems of low drilling efficiency and low core recovery due to borehole collapse were solved with pulling in casing while drilling through using combined BHA with casing.
采用组合钻具进行跟管钻进，通过随钻跟入的套管保护孔壁，解决因钻孔垮塌导致钻探效率和岩心采取率低等技术难题。
This technology keeps the casing in an elastic state in the whole thermal recovery process without plastic deformation taking place, and thus resolves the problem of thermal casing failure.
该技术可使套管在整个开采过程中一直处于弹性状态，不发生塑性变形，从而解决了套管热破坏问题。
Most of the models calculating casing thermal stress in thermal recovery well belong in a monoaxial stress analysis because of neglecting the effect of formation.
许多热采井套管热应力计算模型忽略了地层影响，属于单轴热应力分析。
Casing failure mechanisms of thermal recovery Wells in sand production have become a problem to be urgently solved in heavy reservoir thermal recovery production.
热采井出砂套管损坏机理已成为稠油热采生产中迫切需要解决的问题。
Field application has shown good effect. The rate of casing failure has reduced by over 20 percent, thus ensuring normal production in thermal recovery Wells.
经现场应用效果明显，可使套管损坏率下降20个百分点以上，从而保证了热采油井的正常生产。
Abstract: Casing failure occurs frequently during the hydraulic fracturing process of shale gas formation, which seriously influences the shale gas recovery efficiency.
摘要：在页岩气开采的水力压裂过程中，套损时有发生，严重影响页岩气开采效率。
Abstract: Casing failure occurs frequently during the hydraulic fracturing process of shale gas formation, which seriously influences the shale gas recovery efficiency.
摘要：在页岩气开采的水力压裂过程中，套损时有发生，严重影响页岩气开采效率。
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