Patent ID: 6997263

Claim:
A multi zone isolation tool for use in a subterranean wellbore to selectively control fluid flow relative to first and second zones, the tool comprising: a first tubular and a second tubular disposed within the first tubular forming an annular flow path therebetween that is in fluid communication with the first zone, the second tubular defining a central flow path therein that is in fluid communication with the second zone; an annular valve and annular seat positioned in the annular flow path to control fluid flow therethrough, the annular valve being axially movable relative to the annular seat between a closed position wherein the annular valve is adjacent to the annular seat and an open position wherein the annular valve is axially displaced from the annular seat; and a central valve and central seat positioned in the central flow path to control fluid flow therethrough, the central valve being axially movable in a first direction relative to the central seat from an open position wherein the central valve is axially displaced from the central seat to a closed position wherein the central valve is positioned within the central seat, the central valve being axially movable in the first direction relative to the central seat from the closed position to a reopen position wherein the central valve passes through the central seat, the central seat being operably coupled to the annular valve such that when the central valve and central seat are in the closed position, a pressure variation in the central flow path will operate the annular valve and annular seat from the closed position to the open position.