Wellbore isolation device

A well bore isolation system comprising:

• a downhole tool string having a wellbore isolation system operably disposed within a well bore, the well bore isolation system comprising:
• an outer housing having an inner bore formed therethrough, the outer housing having a treatment port formed therein providing fluidic communication between the inner bore and an exterior;
• a floating inner mandrel disposed within the inner bore of the outer housing, the floating inner mandrel having an inner bore formed therethrough, the floating inner mandrel having a fluid port formed therein providing fluidic communication between the inner bore and an annulus formed between the floating inner mandrel and the outer housing;
• one or more fluid chambers disposed in the annulus, the one or more fluid chambers having a working fluid operably disposed therein;
• one or more inflatable elements operable to receive the working fluid therein and are configured to be retracted and repositioned within the well bore;
• a plunger disposed in the annulus and coupled with the floating inner mandrel, wherein the floating inner mandrel is operable to transition between a first position and a second position, the treatment port and the fluid port substantially aligned in the second position, wherein the plunger urges the working fluid from the one or more fluid chambers to the one or more inflatable elements.

A well bore isolation method comprising:

• disposing a downhole string within a wellbore formed in a subterranean formation, the downhole string having a wellbore isolation assembly therein, the well bore isolation assembly having an outer housing and a floating inner mandrel;
• actuating the wellbore isolation assembly to transition the floating inner mandrel from a first position to a second position;
• transferring a working fluid from one or more fluid chambers disposed in an annulus formed between the outer housing and the floating inner mandrel to one or more inflatable elements;
• inflating the one or more inflatable elements by receiving the working fluid therein until substantial engagement between the one or more inflatable elements and the wellbore formed in the subterranean formation, wherein the one or more inflatable elements are configured to be retracted and repositioned within the well bore, wherein a plunger arranged in the annulus and coupled with the floating inner mandrel urges the working fluid from the one or more fluid chambers to the one or more inflatable elements.