Patent ID: 9404353
Filing Date: 2016-08-02
CPC Classification: E21B

Claim Text:
1. A system for selectively treating zones in a cased well-bore, the system comprising: a downhole tool, having a body, an inner bore therethrough, an inner surface of the body formed by the inner bore, and an outer surface; at least one treatment port disposed on the outer surface of the body; means for selectively isolating the inner bore from the outer surface, the means for selectively isolating the inner bore comprising a sliding sleeve disposed within the inner bore of the body; means for isolating, the means comprising an annular chamber between inner surface of the body and an outer surface of the sliding inner sleeve, the chamber in isolation from the inner bore and the outer surface; means for maintaining the inner sliding sleeve in an open position, the means for maintaining disposed within the annular chamber; and means for maintaining the inner sliding sleeve in a closed position.