Especially it is the same with borehole operation which is limited in radial dimension.
尤其适用于对径向尺寸有限制要求的油田井下作业。
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。
As a result, both blocks can be regarded as candidate sites for high-level radioactive waste repository; and next research stage, e. g. borehole survey, is under operation.
研究结果表明，新场和芨芨槽岩块均比较完整，可作为处置库的候选岩块进入钻孔研究阶段。
The structure and principle of operation of the stabilizer, and method for controlling borehole trajectory with the close_loop adjustable stabilizer at downhole are described in detail.
本文着重论述了井下闭 环可变径稳定器的结构、工作原理及其控制井眼轨迹的方法。
Operation requirements of vertical borehole drilling, found the process of drill pipe shakes or difficult drilling, stones and other foreign bodies may be encountered, should immediately stop check.
操作时要求钻杆垂直，钻孔过程中如发现钻杆摇晃或难钻进时，可能是遇到石块等异物，应立即停机检查。
Operation requirements of vertical borehole drilling, found the process of drill pipe shakes or difficult drilling, stones and other foreign bodies may be encountered, should immediately stop check.
操作时要求钻杆垂直，钻孔过程中如发现钻杆摇晃或难钻进时，可能是遇到石块等异物，应立即停机检查。
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