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