Pipeline

A transmission pipeline for cooling high voltage powerlines with a liquid, comprising:

• a maintenance access valve installed on the pipeline for adding or removing the oil from the pipeline;
• a maintenance manifold installed on the maintenance access valve depending for all purposes regarding the maintenance necessary for the pipeline at that location;
• a manual service shut off valve disposed on the outlet side of the manifold;
• a clear hose mounted at a first end to the outlet of the manual service shut off valve;
• the clear hose mounted at a second end to a manual shutoff valve disposed on a tank within maintenance service equipment;
• a liquid detection sensor installed between the clear hose and the manual shut off valve;
• an electric powered shutoff valve installed between the liquid detection sensor and the manual shutoff valve wherein the electric powered shutoff valve is normally closed when no power is applied to the electric powered shutoff valve;
• a pump motor connected to an outlet of the tank;
• and
• an exhaust pipe mounted to an outlet of the pump.