Expandable Tubing Run Through Production Tubing and Into Open Hole

A downhole completion system, comprising:

• a first sealing structure movable between a contracted configuration and an expanded configuration;
• a second sealing structure also movable between a contracted configuration and an expanded configuration, wherein, when in their respective contracted configurations, the first and second sealing structures are able to axially traverse production tubing extended within a wellbore;
• a conveyance device operably coupled to the first and second sealing structures and configured to transport the first and second sealing structures through the production tubing and to an open hole section of the wellbore;
• and
• a deployment device operably connected to the first and second sealing structures and configured to radially expand the first and second sealing structures from their respective contracted configurations to their respective expanded configurations when arranged in the open hole section, wherein the second sealing structure is arranged axially adjacent the first sealing structure within the open hole section.