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From: Rod Pemberton on 28 Jun 2010 10:26

"io_x" <a(a)b.c.invalid> wrote in message
news:4c287f47$0$40283$4fafbaef(a)reader2.news.tin.it...
> what about this?
> __________________________
> | |
> | weitght==? |
> | |
> | __________ |
> | | |--------|-tap
> | | | |
> | | | | | |
> |^^^^^^^ | | ^^^^^^^^| surface submarine
> ^
> /|\
> |
> point where oil exit
>
> there is someone of you know what is the weight
> for the above structure (**in the water**) for
> controbilance oil pressure?
>

Not I, but I do suspect it'd require them using large amounts of very high
explosives (perhaps nuclear) to attempt a full stop of the oil flow, perhaps
by driving a plug into the bore. Unfortunately, using explosives could make
the situation much worse: large shock waves in water, damage bore in the
rock creating another leak, etc. It'd probably be better if they built a
large diameter pipe around the escaping flow so they could safely direct the
oil up to a specific point on the surface of the water from where the could
capture, filter, etc. the oil and water mix. The pipe wouldn't actually
connect at the broken well head. It would be open, allowing sea water in.
They might eventually be able to then connect a large pump, like those used
in the G-Cans drainage project in Tokyo, to the top of the pipe at the
surface. This would draw in water with the oil at the open junction. You
could think of this a bit like a bunsen burner. At the bottom it has an
inlet for pressurized natural gas (oil) which draws in unpressurized air
(seawater) via another inlet, and emits a mix of the two at the top (oil +
water mix at sea surface ready for oil pump).


Rod Pemberton


From: Geoff on 28 Jun 2010 17:13
On Mon, 28 Jun 2010 05:43:24 -0700, Geoff <geoff(a)invalid.invalid>
wrote:

>On Mon, 28 Jun 2010 05:22:39 -0700, Geoff <geoff(a)invalid.invalid>
>wrote:
>
>>On Mon, 28 Jun 2010 13:04:03 +0200, "io_x" <a(a)b.c.invalid> wrote:
>>
>>>what about this?
>>>__________________________
>>>| |
>>>| weitght==? |
>>>| |
>>>| __________ |
>>>| | |--------|-tap
>>>| | | |
>>>| | | | | |
>>>|^^^^^^^ | | ^^^^^^^^| surface submarine
>>> ^
>>> /|\
>>> |
>>>point where oil exit
>>>
>>>there is someone of you know what is the weight
>>>for the above structure (**in the water**) for
>>>controbilance oil pressure?
>>>

To me, this looks like you are trying to calculate the weight required
to press down on the LMRP with a cap. It doesn't look like you are
talking about the weight of rock and sea over the oil reservoir.

>>>
>>
>Correction:
>W = P * A where
>>W = weight in pounds,
>>P = pressure in PSI,
>>A = area of contact in square inches
Second correction:
If the exit point is a cylinder then A = PI*R^2
>>where R is the radius of the cylinder.

>>
>>Estimated pressure of the BP well is in excess of 6800 PSI.
>>Diameter of the bore of the LMRP exit flange is 21 inches.
>>
>>Pressure at 5000 fsw is 151 ATA. (2220 PSI)
>

This is a hydrostatic balance problem. The pressure of the oil at the
well head balances the weight of the cap. Any excess weight tends to
close the gap in the cup, any excess pressure tends to allow escape of
the oil in a laminar flow at the contact area. The cap "floats" on a
film of pressurized oil.
From: Nick Keighley on 29 Jun 2010 05:28
On 28 June, 12:04, "io_x" <a...(a)b.c.invalid> wrote:

> what about this?
> __________________________
> |                        |
> |  weitght==?            |
> |                        |
> |      __________        |
> |      |        |--------|-tap
> |      |        |        |
> |      |   | |  |        |
> |^^^^^^^   | |   ^^^^^^^^|  surface submarine
>             ^
>            /|\
>             |
> point where oil exit
>
> there is someone of you know what is the weight
> for the above structure (**in the water**) for
> controbilance oil pressure?

and your C question was?
From: Steve on 29 Jun 2010 08:31
Frank Kotler <fbkotler(a)myfairpoint.net> writes:
>
>Cool ASCII-art! (Annie was prettier :)

True.

>
>> there is someone of you know what is the weight
>> for the above structure (**in the water**) for
>> controbilance oil pressure?
>
>Doesn't matter, we can pile rocks on it until it's "enough". Similar to
>the first solution Bee Pee tried (as I understand it). The problem
>appears to be that "ice-like crystals" (methane clathrates, I guess)
>plug up your "tap". (Why they don't plug up the leak is a mystery to me!)

Short answer: The clathrates are a mixture of methane
and water (ice). There is (mostly) no water in the pipe.
So no plug.

I guess I wonder why a conical plug was not inserteded
after they cut off the damaged pipe? Probably wouldn't
stop it, but should significantly slow it.

Regards,

Steve N.

______
\ /
\ /
\/
| |
^^^ ^^^
From: eps on 29 Jun 2010 08:51
io_x wrote:
> what about this?
> __________________________
> | |
> | weitght==? |
> | |
> | __________ |
> | | |--------|-tap
> | | | |
> | | | | | |
> |^^^^^^^ | | ^^^^^^^^| surface submarine
> ^
> /|\
> |
> point where oil exit
>
> there is someone of you know what is the weight
> for the above structure (**in the water**) for
> controbilance oil pressure?
>
>
>
>
>

Once you have solved this spill perhaps you could head over to the
nigerian delta and fix all the ones that happen there every month.

http://en.wikipedia.org/wiki/Environmental_issues_in_the_Niger_Delta#Oil_spills
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