Patent ID: 8215411

Claim:
A downhole sliding sleeve, comprising: a housing defining a bore and defining a port communicating the bore outside the housing; an insert disposed in the bore and being movable from a closed condition to an opened condition, the insert in the closed condition preventing fluid communication between the bore and the port, the insert in the opened condition permitting fluid communication between the bore and the port; a seat movably disposed in the insert, the seat when the insert is in the closed condition extending at least partially into the bore and engaging a plug disposed in the bore to move the insert from the closed condition to the opened condition, the seat when the insert is in the opened condition retracting from the bore and releasing the plug; and an inset member being temporarily disposed in the port, the inset member at least temporarily maintaining fluid pressure in the bore and allowing the maintained fluid pressure to act against the plug and open at least one additional downhole sliding sleeve.