Method and apparatus for treating a subterranean formation

Apparatus for treating a subterranean formation intersected by a well casing that is perforated at a plurality of subsurface zones, comprising:

• a service/completion liner assembly having a plurality of interconnected packer/indicating extension tools isolating each of said plurality of subsurface zones and defining a plurality of isolated casing annulus zones within the well casing, said service/completion liner assembly defining a service tool passage;
• said interconnected packer/indicating extension tools each having fluid injection ports and a sliding sleeve valve assembly being moveable to open and closed positions relative to said fluid injection ports, each of said packer/indicating extension tools having a downhole convertible indicating collar mechanism defining an internal indicating profile and having a “Go” condition preventing the landing of well service tools on said internal indicating profile and a “No-go” condition exposing said internal indicating profile for landing of well treatment tools thereon;
• and
• a well service tool adapted for conveyance into and through said service tool passage and having an actuator collet adapted for selective converting actuation of said downhole convertible indicating collar assembly to said “Go” condition and said “No-go” condition.

Apparatus for treating a subterranean formation intersected by a well casing that is perforated at a plurality of subsurface zones, comprising:

• a service/completion liner assembly having a plurality of interconnected packer and indicating extension tools for sealing within the well casing and isolating each of said plurality of subsurface zones and defining a plurality of isolated casing annulus zones within the well casing, said service/completion liner assembly defining a service tool passage;
• said interconnected packer and extension tools each having a sleeve valve body defining fluid injection ports and a sliding sleeve valve being moveable within said sleeve valve body and defining injection ports and being moveable to an open position with said injection ports in registry and a closed position with said injection ports blocked and preventing fluid flow;
• each of said packer/indicating extension tools having a downhole convertible indicating collar mechanism defining an internal indicating profile;
• a converting mechanism within each of said downhole convertible indicating collar mechanisms having a traveling sleeve member being moveable to positions establishing a “Go” condition preventing the landing of well treatment tools on said indicating profile and a “No-go” condition exposing said internal indicating profile for landing of well treatment tools thereon;
• and
• a well service tool adapted for conveyance into and through said service tool passage and having an actuator collet adapted for selective movement of said sliding sleeve valve to said open and closed positions thereof and for converting actuation of said traveling sleeve member of said downhole convertible indicating collar assembly to said “Go” condition and said “No-go” condition.