A stage tool for cementing casing in a wellbore annulus, the tool comprising: a housing to be disposed on the casing and having a first internal bore and an exit port , the exit port communicating the first internal bore with the wellbore annulus; a first breachable obstruction disposed on the tool and preventing fluid communication through the exit port , the first breachable obstruction being exposed to the first internal bore between ends of a closing sleeve and an intermediate sleeve , the first breachable obstruction being breached in response to a first fluid pressure component in the first internal bore acting against the breachable obstruction and permitting fluid communication through the exit port when breached; wherein the closing sleeve is an internal sleeve movably disposed in the first internal bore of the housing and having a second internal bore , and the closing sleeve movably disposed on the tool at least from an initial position to a closed position relative to the exit port , the closing sleeve in the initial position leaving the first breachable obstruction exposed to the first internal bore and protecting an upper sealing area defined on the first internal bore , the closing sleeve moving from the initial position to the closed position at least in part in response to a second fluid pressure component, the closing sleeve in the closed position covering the exit port and preventing fluid communication through the exit port ; and the intermediate sleeve disposed in the first internal bore and being moveable in the first internal bore at least from a first position to a second position, the intermediate sleeve in the first position at least partially covering a lower sealing area defined on the first internal bore , the intermediate sleeve in the second position being moved away from the lower sealing area , thereby allowing the closing sleeve to seal with the upper and lower sealing areas . a housing to be disposed on the casing and having a first internal bore and an exit port , the exit port communicating the first internal bore with the wellbore annulus; a first breachable obstruction disposed on the tool and preventing fluid communication through the exit port , the first breachable obstruction being exposed to the first internal bore between ends of a closing sleeve and an intermediate sleeve , the first breachable obstruction being breached in response to a first fluid pressure component in the first internal bore acting against the breachable obstruction and permitting fluid communication through the exit port when breached; wherein the closing sleeve is an internal sleeve movably disposed in the first internal bore of the housing and having a second internal bore , and the closing sleeve movably disposed on the tool at least from an initial position to a closed position relative to the exit port , the closing sleeve in the initial position leaving the first breachable obstruction exposed to the first internal bore and protecting an upper sealing area defined on the first internal bore , the closing sleeve moving from the initial position to the closed position at least in part in response to a second fluid pressure component, the closing sleeve in the closed position covering the exit port and preventing fluid communication through the exit port ; and the intermediate sleeve disposed in the first internal bore and being moveable in the first internal bore at least from a first position to a second position, the intermediate sleeve in the first position at least partially covering a lower sealing area defined on the first internal bore , the intermediate sleeve in the second position being moved away from the lower sealing area , thereby allowing the closing sleeve to seal with the upper and lower sealing areas . <EOS>