HXK hydraulic expansion type packer (casing external packer) uses hydraulic expansion type structure, mainly be used in the complex 

 

wells'(oil, gas, water) completion project, to achieve downhole packer and bridging and in favor of improvement of the quality of completion 

 

. The practice proved that this tool have characters of easy operation, wide adaptability, it has a very important position in the 

 

completion project.