插入密封通常用于多层简易防砂外管柱的最下部，与沉砂封隔器密封筒配合实现密封内、外 管柱。工具下端具有弹性卡爪结构，进入沉砂封隔器（或者相同尺寸密封筒时）弹性卡爪压缩变 形，插入负荷显著增加，可在井口判断已经进入封隔器，当工具下放至与预定位置时，上部的定 位台阶坐落在封隔器芯轴上，中间多组密封单元结构实现封隔器芯轴上下两部分的密封隔离。

INSERT SEAL

The insertion seal is an integrated unit whose seal assembly is sealed with the inner hole of the SPF grit  packer. The bottom positioning indicator provides the positioning indication of the intubation and SPF  grit packer. When it is necessary to take out the intubation or confirm the intubation position, lift the  oil pipe and provide 5T axial load to make the elastic claw of the positioning indicator retract under the  action of the chamfer at the bottom of the packer, so as to take out the sealed intubation.

Note: Other specification products are available.