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Politics : The Environmentalist Thread -- Ignore unavailable to you. Want to Upgrade?

To: Brumar89 who wrote (29002)	5/29/2010 11:16:15 AM
From: Wharf Rat	Read Replies (1) \| Respond to of 36917

"You can't believe anything the NOAA says" Of course not; if it doesn't come from Rush or Faux, it's a lie. "the ones who came up with the 5000 bpd oil leak estimate." You know it wasn't? Has anybody told you the leak has gotten bigger over time, because sand under pressure is eroding pipes? They have now. 3 – A small leak under some pressure was observed where the riser was kinked at the BOP. An early and poor quality still photos does not seem to show any leakage while videos released in the last few days show a very substantial flow from several leak points, some with pressure behind them. Any place there is a reduction causing high velocity flow you will have erosion. The speed of that erosion depends of a number of factors. The primary factors are velocity (which is generated by the pressure differential), the material being eroded and any entrained solids like sand in the flow. Other factors can also contribute such as temperature, the corrosive value of the flow, etc. In this case there is almost certainly some amount of sand in the flow which would act just like a sand blaster. A small orifice will erode more quickly that a large one as more of the flow comes in direct contact with the material, but as long as the stream is running the erosion will continue and the leak area will keep growing. It is therefore logical that the leak would start small, grow rapidly and over time the growth rate would slow down as the pressure differential and the velocity slow. Message 26555065