Data communication system and method for communicating with an underground instrument package, and data communication system for communicating with an underground electronic device.

摘要

"DATA COMMUNICATION SYSTEM AND METHOD FOR COMMUNICATION WITH A PACKAGE OF UNDERGROUND INSTRUMENTS, AND, DATA COMMUNICATION SYSTEM FOR COMMUNICATION WITH AN UNDERGROUND ELECTRONIC DEVICE. A data communication system is provided for communication with an underground package. a drilling rig. The drilling rig has an isolated section between the first and second conductive sections. The system includes a power supply connected to the first conductive section of the drilling rig and to the ground. A receiver measures the current flow through of the power supply An electrical path is provided between the first second conductive sections of the drilling rig A switch provided in the electrical path opens and closes the electrical path in response to the data generated by the instrument package.