Condeep

Condeep is a make of gravity-based structure for oil platforms invented and patented by engineer Olav Mo in 1972,[1] which were fabricated by Norwegian Contractors in Stavanger, Norway.

[2] Following the success of the concrete oil storage tank on the Ekofisk field, Norwegian Contractors introduced the Condeep production platform concept in 1973.

This platform type was designed for the heavy weather conditions and the great water depths often found in the North Sea.

With a total height of 472 metres (1,549 ft), Troll A was the tallest object that has ever been moved to another position, relative to the surface of the Earth.

[9] Gullfaks C was the heaviest object that has ever been moved to another position, relative to the surface of the Earth with a total displacement between 1.4 and 1.5 million tons.