This paper introduces a new cementing tool named circulating blind pipe, and it's mechanical structure, operation principle and successful applications while cementing a liner in a lost well.
详细介绍了一种新型固井用井下工具——可循环盲板的结构、工作原理及其在漏失井筛管固井中的成功应用。
Cooperated with RD safety circulating valve, it can entirely take the place of APR-M2 tool with the character of accurate sampling, reducing construction period, simple and safe sampling etc.
与RD安全循环阀配合使用，完全可以替代APR-M_2工具，具有取样准确、缩短施工工期，取样过程简单、安全等特点。
Because of the quick change and unexpected stop of the circulating direction of oil liquid, the machine tool hydraulic system will produce pressure impact.
机床液压系统由于油液流动方向迅速改变或突然停止流动，产生压力冲击。
Because of the quick change and unexpected stop of the circulating direction of oil liquid, the machine tool hydraulic system will produce pressure impact.
机床液压系统由于油液流动方向迅速改变或突然停止流动，产生压力冲击。
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