Wireless downhole feedthrough system

A method for communicating optical signals wirelessly through a wellbore barrier defined by a first flow completion system component positioned at an upper end of the wellbore and a second flow completion system component mounted within the first flow completion system component, the method comprising:

• providing a first wireless node which is mounted on the first flow completion system component on a first side of the wellbore barrier, the first wireless node being configured to be connected to an external device;
• providing a second wireless node which is mounted on the second flow completion system component on a second side of the wellbore barrier, the second wireless node being located generally opposite the first wireless node and being configured to be connected to a downhole device;
• wherein the first and second wireless nodes are configured to communicate wirelessly through the wellbore barrier using near field magnetic induction (NFMI) communications;
• converting optical signals from the external device into corresponding electrical signals;
• using the first wireless node, transmitting the electrical signals wirelessly through the wellbore barrier using NFMI communications;
• using the second wireless node, receiving the transmitted signals from the first wireless node;
• and
• converting the received transmitted signals back into optical signals.