Patent ID: 7086481

Claim:
An apparatus for maintaining a wellbore condition during a wellbore operation, the apparatus comprising: a selectively actuatable wellbore isolation member having a valve being moveable between an open position and a closed position, and being biased to its closed position, wherein the selectively actuatable wellbore isolation member is a plug that comprises: a tubular plug body, wherein the valve is disposed along an inner surface of the tubular plug body; a sealing element disposed around the plug body; and an anchoring member; a wellbore operation tool coupled to the wellbore isolation member; and a tubular string releasably connected to the wellbore isolation member, wherein the tubular string is releasable from the isolation member while at least a portion of the isolation member maintains the wellbore condition, wherein the wellbore isolation member further comprises a setting/releasing tool for selectively actuating the plug, the setting/releasing tool comprising: a tubular inner mandrel having a top end and a bottom end; a setting system for urging the sealing element and the anchoring member outward into engagement with the surrounding wellbore when the setting system is actuated; a releasing system for urging the sealing element and the anchoring member inward towards the plug body when the releasing system is actuated; a releasable connector for releasably connecting the setting releasing tool from the tubular plug body; and wherein the bottom end of the tubular inner mandrel of the setting/releasing tool holds a flapper valve in its open position when the setting/releasing tool is connected to the plug, but clears the flapper valve to close when the setting/releasing tool is released from the plug and raised within the wellbore.