... 流通环境保护 circulation environmental protection 流通损耗 circulation loss 流通载体 circulation carrier ...
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By changing the size of drilling bit and casing we can optimize the hole structure, avoid the complicated incidents like circulation loss, rockfall and bit freezing in Yimin, optimize pendulum drill assembly and packed hole assembly.
通过改变钻头和套管尺寸,优化了井身结构,避免了伊敏组以上井段井漏、井塌、卡钻等井下复杂。
参考来源 - 提高海拉尔地区钻井速度技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
However, its function was often lost upon the serious circulation loss occurring to the formation with low pressure coefficient and relatively macro fractures.
但对地层压力系数低且裂缝较大的严重井漏往往失去作用。
The current classification schemes for circulation loss zone are hardly suitable for the complicated circulation loss cases which are influenced by many factors.
目前的漏失层分类方案很难适用于错综复杂多因素影响的孔漏情况。
Very severe problems during drilling were circulation loss and borehole collapse because of formation fracture growing, and drilling operation was very difficult.
该气田地层裂缝发育，钻井过程中井漏和井塌问题非常严重，钻井作业十分困难。
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