One-trip setting is accomplished by pressuring up against a pluggingdevice below the packer after it has been run to depth.
一次下钻坐封时，首先将封隔器下入到预定位置时，通过在位于封隔器下方的短接下入堵头而后加压实现坐封。
2
The exhausting anti-pluggingdevice is good in seal effects, safe and reliable in operation, meanwhile, the service life of the seal ring is also greatly prolonged;
该排气防堵装置密封效果好，使用安全可靠，同时也大 大的延长了密封圈使用寿命；
3
An automatic door pluggingdevice is arranged between an upper and a lower material positions and between the positions of the cleaning device and the drying device respectively.