RE: Flow line connection puzzle13 Feb 2019 23:19
JoeSoap
I think that you are wrong when stating the following:
"As DC posted, the buoy does not add to the lift-load until it is clear of the water. But looking at the photos on HUR we can read the height of the buoy and it appears to float at around 6.5 meters, leaving 10 meters above the waterline. It also appears that the same 10 meters is the part contained within the turret, so it's weight is never lifted as it is always in the water underneath the FPSO by that same amount".
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Archimedes' principle states that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces and acts in the upward direction at the center of mass of the displaced fluid.
Thus the effective weight of the buoy will increase as soon as the cone starts to clear the water and enter the lower part of the turret, as less fluid is being displaced.