The field of the invention is sealing and retaining assemblies for downhole tools and {HEAD ~ more specifically downhole tools} set by {TAIL ~ expansion} such as, for example, packers, bridge plugs or liner packers 
set by
The field of the invention is sealing and retaining assemblies for downhole tools and { HEAD ~ more specifically downhole tools } set by { TAIL ~ expansion } such as , for example , packers , bridge plugs or liner packers
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