A retrievable stimulation frac (retrievable stimulation frac) plug for a well casing having an elongate mandrel having a fluid flow bore, a check valve mandrel seal moveable between an open position and a closed position for selectively sealing the fluid flow bore, a sealing mechanism for sealing between the mandrel and the casing, and a locking mechanism for axially locking the retrievable stimulation frac plug in the casing.
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