在下井时，可取芯轴保持在旁通孔打开的位置，可以保持流体通道的畅通，方便

在下井时，可取芯轴保持在旁通孔打开的位置，可以保持流体通道的畅通，方便下入。当堵塞坐落到相应的坐落接头时，可取芯轴移动关闭旁通孔堵塞油管。在回收时，首先可取接头可被标准的回收工具回收。当平衡压力后，整个堵塞可被回收，从而油管完全畅通。

When running in the well, the mandrel can be kept at the open position of the bypass hole to keep the fluid channel unblocked and facilitate running in. When the plug is seated at the corresponding seating joint, the mandrel can be moved to close the bypass hole and plug the oil pipe. When recycling, the first desirable joint can be recycled by standard recycling tools. When the pressure is balanced, the whole blockage can be recovered, so that the oil pipe is completely unblocked.

When running into the well, it is advisable to keep the mandrel in the position where the bypass hole is open, which can keep the fluid channel unblocked and facilitate running. When the plug is seated on the corresponding seating joint, the mandrel can be moved to close the bypass hole to block the oil pipe. When recycling, the first available joint can be recycled by standard recycling tools. When the pressure is balanced, the whole blockage can be recovered, so that the tubing is completely unblocked.