Præsentation ved Piet Jansen, Corrosion and Metallurgy, FORCE ...
Præsentation ved Piet Jansen, Corrosion and Metallurgy, FORCE ...
Præsentation ved Piet Jansen, Corrosion and Metallurgy, FORCE ...
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Havari analyse af olieborerig<br />
Jacking-up stores potential energy in the rig<br />
©<strong>Piet</strong> <strong>Jansen</strong>, <strong>FORCE</strong> Technology<br />
Energy Survey<br />
Potential energy: Epot = M ·g ·h<br />
Descend: 4 - 12,5 - 25 - 42 ft<br />
Epot: 20 - 60 - 120 - 200 MJ<br />
Converted to: Dynamic Energy + Friction Losses<br />
Edyn = ½·M·v² + Friction loss<br />
From the above equations, the released Energy, velocity <strong>and</strong> time can be calculated.<br />
The friction loss can only be estimated<br />
Absorbed energy by bending of one leg until yielding:<br />
E = ½ F·u<br />
Start Yield: Esy = ½Fsy ·u sy = 1,9 MJ per leg<br />
Full Yield: Esy = ½Ffy ·u fy = 2,4 MJ per leg
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