
Panjin, Liaoning
When a downhole fire occurs in oilfield wells, traditional water-based extinguishing cannot reach deep underground. Liquid CO₂ injected through the wellbore into the fire zone rapidly vaporizes and expands, isolating oxygen while absorbing large amounts of heat, quickly cooling and suffocating the fire with no re-ignition risk.
Liquid CO₂ fire extinguishing causes no pollution to the formation, does not damage oil well structure, and production can be restored directly after extinguishing; it is one of the most effective extinguishing methods for deep well fires and natural gas well blowouts.