Patent ID: 7066264
Filing Date: 2006-06-27
Classification: E21B

Abstract:
1. A method for treating a subterranean formation intersected by a well casing that is perforated at a plurality of subsurface zones, comprising: positioning within the well casing a service/completion liner assembly having a tool passage and 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, each of said packer/indicating extension tools having at least one injection port and having a sliding sleeve valve assembly being moveable to open and closed positions relative to said at least one injection port, each of said packer/indicating extension tools having a downhole convertible indicating collar defining an internal indicating profile and being selectively convertible to a “Go” condition preventing the landing of well treatment tools on said internal indicating profile thereof and a “No-go” condition exposing said internal indicating profile thereof for landing of a well service tool thereon; running a well service tool into said tool passage of said service/completion liner assembly and into a selected packer indicating extension tool thereof and moving said sliding sleeve valve assembly to the open position thereof and actuating the selected downhole convertible indicating collar thereof to said “No-go” condition; landing said well service tool on said internal indicating profile of the selected downhole convertible indicating collar, thus communicating said well service tool with a selected isolated casing annulus zone via said at least one injection port of the selected packer/indicating extension tool; and conducting well treatment by injecting well treatment fluid from said well service tool through said at least one injection port into the respective isolated casing annulus and through the casing perforations of the respective isolated casing annulus into the surrounding formation.