To operate the Advanced Sparker Tool, DC power is supplied to the High Voltage Power Supply Unit (HVPSU). The DC power can be supplied by the GeochainTM system or, if run independently, directly from the surface.

The downhole HVPSU charges a bank of capacitors to a high voltage. When the critical voltage has been reached the energy is switched to the electrode via a gas discharge switch, generating a spark and creating a high energy output pulse. The unit can be programmed to fire at a constant rate, or it can be triggered remotely.