密封舱安装在顶部封隔器下部，与配套的密封模块配合用于密封封隔器和4”冲管的 环空。与密封模块上面的密封组合形成密封，在多层充填过程中密封封隔器和冲管环空。
Pack-Off assembly is installed at the lower part of top packer, collaborating with sealing module for sealing the annulus between packer and 4" wash pipe, forming sealing incorporated with the sealing module, realizing annulus sealing between packer and wash pipe during multi-zone pack.
Note: Other specification products are available.
