This was a gas storage well that supplied gas to the German capital, Berlin.
A down-hole explosion occured during regular maintenance, which caused the well to blow out.
This explosion caused major damage to the completion, casing and well-head.
The primary objective was to safeguard the well by changing out the well-head and gaining access to the reservoir.
The well site is located on the outskirts of Berlin close to residential areas.
Therefore maximum precautions had to be taken to ensure the safety of the nearby residents: