WIRELESS DOWNHOLE FEEDTHROUGH SYSTEM

摘要

An apparatus for communicating optical signals between an external device located on a first side of a wellbore barrier and a downhole device located on a second side of the well bore barrier includes a first wireless node which is positioned on the first side of the well bore barrier and is in communication with the external device via a first cable. A second wireless node is positioned on the second side of the well bore barrier and is in communication with the downhole device via a second cable. The first and second wireless nodes are configured to communicate wirelessly through the well bore barrier using near field magnetic induction (NFMI) communications.

主权项

1. In combination with a flow completion system which includes a tubing spool positioned at the top of a wellbore and a tubing hanger landed in the tubing spool, the improvement comprising a system for communicating optical signals between an external device located outside the tubing spool and a downhole device located in the wellbore, the system comprising:
a first wireless node which is positioned adjacent an outer surface portion of the tubing spool, the first wireless node being in communication with the external device via a fiber optic first cable; a second wireless node which is positioned in the tubing hanger generally opposite the first wireless node; the first and second wireless nodes being configured to communicate wirelessly through the tubing spool using near field magnetic induction (NFMI) communications; the tubing hanger comprising a feedthrough bore which extends generally axially from proximate the second wireless node to a bottom wall portion of the tubing hanger; a third wireless node which is positioned in the tubing hanger on a first side of the bottom wall portion; the second and third wireless node being connected by a second cable which is positioned in the feedthrough bore; a fourth wireless node which is positioned on a second side of the bottom wall portion generally opposite the third wireless node, the fourth wireless node being in communication with the downhole device via a fiber optic third cable; the third and fourth wireless nodes being configured to communicate wirelessly through the bottom wall portion using NFMI communications; a first optical converter which is configured to convert optical signals received from the external device over the first cable into corresponding signals for wireless transmission by the first wireless node through the tubing spool to the second wireless node; wherein the signals received by the second wireless node are transmitted over the second cable to the third wireless node for wireless transmission through the bottom wall portion to the fourth wireless node; and a second optical converter which is configured to convert the corresponding signals received by the fourth wireless node into optical signals for transmission over the third cable to the downhole device.