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 communicating with an underground instrument package, and data communication system for communicating with an underground electronic device. a data communication system is provided for communicating with an underground instrument package positioned at a drilling rig the drilling rig has an insulated 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 earth a receiver measures current flow through from the power supply an electric path is provided between the first second conductive sections of the drilling apparatus a switch provided in the electric path opens and closes the electric path in response to the data generated by the instrument package.