Patent ID: 8245788

Claim:
A downhole sliding sleeve, comprising: a housing defining a bore and defining at least one 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 at least one port, the insert in the opened condition permitting fluid communication between the bore and the at least one port; at least one inset member being temporarily disposed in the at least one port; and a seat movably disposed on 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 with application of fluid pressure against the seated plug, the seat when the insert is in the opened condition retracting from the bore and releasing the plug, wherein the at least one inset member at least temporarily maintains fluid pressure from communicating through the at least one port after the insert has moved to the opened condition and the seat has released the plug, and wherein the at least one inset member defines at least one orifice permitting flow therethrough, the at least one orifice producing a pressure differential across the insert in the closed condition, the pressure differential facilitating movement of the insert from the closed condition to the opened condition.