Patent ID: 8646533

Claim:
A mechanical sliding sleeve, comprising: a sleeve housing defining a fluid communication port, a first end and a second end; a first sub affixed to the first end of the sleeve housing; a second sub affixed to the second end of the sleeve housing, such that the sleeve housing, the first sub, and the second sub define an internal bore; an isolation sleeve disposed in the internal bore and defining a fluid communication port, the isolation sleeve being slidable along interfaces between the first sub, the second sub, and the sleeve housing between an open position wherein the fluid communication port of the isolation sleeve is at least generally aligned with the fluid communication port of the sleeve housing and a closed position wherein the fluid communication port of the isolation sleeve is misaligned with the fluid communication port of the sleeve housing; and at least one sealing element comprising injectable packing, the at least one sealing element operably associated with the sleeve housing, the first sub, the second sub, and the isolation sleeve, the at least one sealing element inhibiting fluid flow through the fluid communication ports unless the isolation sleeve is in the open position and sealing at least a portion of the interfaces from contact with downhole fluids.