Patent ID: 8258976
Filing Date: 2012-09-04
Classification: E21B

Abstract:
1. A wireless communications system for use in a borehole extending from a surface comprising: a first downhole sub, the first downhole sub having an outer surface; a lower electrode mechanically connected to the first downhole sub wherein the lower electrode is insulated from the first downhole sub and wherein the lower electrode is externally exposed to an environment of the first downhole sub; a first transmitter electrically connected to the lower electrode, wherein the first transmitter is adapted to modulate power to the lower electrode so as to minimize power consumption and maintain a sufficient signal to noise ratio in response to the drilling environment; a communication management controller in communication with the first transmitter for driving a data modulated current into the lower electrode by way of the first transmitter; a second downhole sub; an upper electrode mechanically connected to the second downhole sub wherein the upper electrode is insulated from the second downhole sub and wherein the upper electrode is externally exposed to an environment of the second downhole sub; a receiver electrically connected to the upper electrode wherein the receiver is adapted to receive a signal from the upper electrode wherein the signal represents measurement data; and a surface uplink transmitter in communication with the receiver wherein the surface uplink transmitter is adapted to communicate the measurement data from the receiver to the surface.