Resonant receiver for electromagnetic telemetry

An assembly comprising:

• a transceiver for wirelessly communicating signals at a frequency of less than 50 hz through a subterranean formation within a wellbore environment;
• a counter electrode coupleable to a wellhead for generating a voltage differential between the counter electrode and the wellhead to transmit or receive signals;
• an amplifier;
• and
• a tank circuit operable to resonate at a resonant frequency to pass a received signal at the resonant frequency to the amplifier and shunt noise outside of the resonant frequency to ground.

A method comprising:

• receiving, by a surface assembly comprising a counter electrode coupled to a wellhead for generating a voltage differential between the counter electrode and the wellhead to transmit or receive signals, a wireless signal at a frequency of less than 50 hz through an antenna for communicating with equipment positioned downhole in a wellbore;
• shunting, by a tank circuit of the surface assembly, noise outside of a resonant frequency to ground, the tank circuit resonating at the resonant frequency;
• transmitting the wireless signal received at the resonant frequency through the tank circuit to an amplifier of the surface assembly;
• and
• amplifying, by the amplifier, the wireless signal.