annulus line 环空管 ; 环形管路
annulus flow line 环空出油管
annulus access line 环空连通管
annulus s access line 环空连通管
The center line of the flow care is partial to the inner side of annulus.
流核中心线偏离环空中心线，且偏向环空内侧。
The injection mandrel is equipped with a port - and check-valve system to direct fluid pumped down the annulus or injection line into the production conduit.
配注器装有孔口阀和单向阀系统，使泵入的流体沿环空向下或沿注入管线向下进入生产导管。
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