Torpedo piles are steel foundations responsible for fixing anchor lines for FPSO, semi-submersibles or riser systems in deep and ultra-deep waters.
This mooring system was developed by PETROBRAS in 1996 to reduce the costs of floating installations, being the subject of several studies at COPPE/UFRJ until its consolidation.
It is composed of a conical end connected to the body, which is a steel cylinder, with an eyelet at the top where the chain is connected. It has fins on the sides to increase friction with the ground.
Interesting: a ballast is added inside to increase weight, which can be made of lead or steel.
Advantages of torpedo stake:
– Withstands high horizontal and vertical loads
– Smaller area for installation (foot-print)
– Installed with a single AHTS
– Lower cost in deep water
– 120 t weight torpedo pile with lead ballast
– 22 meters long, body diameter 1200 mm
– 2 lattice cranes of 260 t each
– Embark on AHTS