Fas Drill frac plugs are designed to seal from above the plug only. Each plug uses a plastic fracturing ball that seals on top of the mandrel. The fracturing ball is free to float off the mandrel with pressure or flow from below the plug. This allows immediate flowback of all zones following treatment.
Pumpdown versions of the Fas Drill frac plug are available in select sizes. These tools are designed to be run with a rubber ring installed on the mule shoe that allows the tool to be pumped out into the horizontal section of the wellbore.