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Message
re: Links to live feeds from remotely operated vehicles (ROV)
Posted on 6/5/10 at 12:22 pm to jeffsdad
Posted on 6/5/10 at 12:22 pm to jeffsdad
quote:
Why not continue that process, knowing they wont be able to "kill" it but at least minimizing the oil coming out? Would that interfere with what they are currently doing?
I believe I saw someone made a comment about the amount of mud that would be required to continue "top-kill" isn't practical. Remember that this is a special formulated mud that they use and it was my understanding there wasn't enough of it available. At least that was my understanding but I could be wrong.
1
Posted on 6/5/10 at 12:27 pm to JudgeHolden
quote:
quote:
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Can the really not suck hard enough to pull up 12k barrels of oil through the existing riser???
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If you "suck it," you pull seawater in and freeze it up. And that would suck.
Right now it is producing under its own pressure. If the pressure drops so much that they had to "suck it," it would not flow to begin with. It would just remain static.
If the flow is over 12K then sucking/pumping 12k would not suck in any water as the net would still be a positive for the oil flow.
Posted on 6/5/10 at 12:30 pm to paulie
quote:
I believe I saw someone made a comment about the amount of mud that would be required to continue "top-kill" isn't practical. Remember that this is a special formulated mud that they use and it was my understanding there wasn't enough of it available. At least that was my understanding but I could be wrong.
Correct paulie. They used something like 30,000 bbl of mud in the few days that they were trying to top kill the well. Extrapolate that until August and I don't think there's a big enough supply of barite on the planet to support that.
Posted on 6/5/10 at 12:41 pm to MountainTiger
quote:
Correct paulie. They used something like 30,000 bbl of mud in the few days that they were trying to top kill the well. Extrapolate that until August and I don't think there's a big enough supply of barite on the planet to support that.
The more I think about it, I think the "top-kill" also gave them a general idea of how much the leak rate actually is. A ballpark number would be how much mud they pumped / lost divided by the time that they pumped especially if they were able to buck the well pressure some and minimize the amount of oil that leaked out. That would make the pressure at the leak with the mud pumping approximately the same as the pressure from the well. There are differences in density / viscosity / single phase versus two phase but it does seem to give a general number as to how big the leak is and how they further plan to recover the oil / gas with the Enterprise and this other vessel they plan on using.
Does that make sense?
Posted on 6/5/10 at 12:57 pm to paulie
quote:
Does that make sense?
Maybe but I think there are two unknowns in that equation. One is the natural flow rate of the well and the other is rate of leakage from the riser. If they knew the formation pressure, they could probably figure out the flow rate from Bernoulli's equation.
Posted on 6/5/10 at 1:12 pm to MountainTiger
Looks like Enterprise ROV2 is closing a valve.
Posted on 6/5/10 at 1:47 pm to JasonLSU
Looks like they are working around the BOP and not the cap on Enterprise 2.
They may be making preparations for the addition siphon lines to the Q4000 vessel off the choke / kill lines. That would be one activity we would expect to see in the next day or so in addition to closing the valves on the top hat cap.
They may be making preparations for the addition siphon lines to the Q4000 vessel off the choke / kill lines. That would be one activity we would expect to see in the next day or so in addition to closing the valves on the top hat cap.
Posted on 6/5/10 at 1:54 pm to paulie
quote:
Looks like they are working around the BOP and not the cap on Enterprise 2.
It was attached to the cap when I wrote the message. One arm had anchored it and it looked like it was trying to turn something on a hose that went vertical to the top of the cap. Not sure what the valve looks like, just assumed that was it. Incidentally it looked like it took some time for it to find whatever it was due to visibility issues.
Posted on 6/5/10 at 2:07 pm to JasonLSU
No lines connected to the vent vaves. Hideden by oil on top of the top hat. Look like 3 inch valves.
Posted on 6/5/10 at 2:21 pm to paulie
quote:
Was this decision due to Friday stock close coming up or Obama's visit? Who knows for sure but I think a lot of folks would like to see them go back to the original LMRP plan to get a tighter seal and recover more of the oil.
That would have been nice. It is possible the guvmint pressured them. But I cannot imagine them forgoing a 100 percent capture if they thought they could have gotten it with a little more time. May have been worried they would get the saw stuck and not be able to get it out.
Posted on 6/5/10 at 2:24 pm to JudgeHolden
Just asking, I have herd that when they cut the riser off that the flow would increase, so now that they have done that and lowered the dome and are sucking some of the oil out my question is "are they sucking more that the diffrence of how much was flowing before they made the cut"
Posted on 6/5/10 at 3:08 pm to Tigerpaw123
Does anyone know what exactly they are waiting on to close the valves ?
Posted on 6/5/10 at 4:04 pm to TexTiga
Do we know if they are closed or open? They had Rov's holding on to the handles for hours after the cap was installed.
Posted on 6/5/10 at 4:24 pm to omegaman66
CNN reported that the valves were open and that they would be " working " to close them over the next 24-48 hours . I do not see any effort being made to close them . Are they being operated remotely?
Posted on 6/5/10 at 4:24 pm to omegaman66
I know they plan to put like 20000 lbs of pressure down onto teh top hat setup. My guess is they HAVE to do that before they close teh valves or the hat would blow off if you cloed the valves.
Question..will the flow slow down because of the mile of weight of the oil going up to the surface? That has got to put a bunch of pressure back down on the well.
Question..will the flow slow down because of the mile of weight of the oil going up to the surface? That has got to put a bunch of pressure back down on the well.
Posted on 6/5/10 at 4:27 pm to the LSUSaint
quote:
Question..will the flow slow down because of the mile of weight of the oil going up to the surface? That has got to put a bunch of pressure back down on the well.
Im sure the pressure is less but the oil is lighter than water so it should float right up the pipe Im thinking.
Posted on 6/5/10 at 4:46 pm to the LSUSaint
quote:
Question..will the flow slow down because of the mile of weight of the oil going up to the surface? That has got to put a bunch of pressure back down on the well.
No, there is no seal. Any excess pressure will just go out the bottom of the cap.
Posted on 6/5/10 at 5:39 pm to baytiger
Valves r not remotely operated. Simple Ball valves.
The 22000 pounds of downward pressure was possible just for the firt top hat??? Don't know if they plan on doing it on this one or if they already have.
The 22000 pounds of downward pressure was possible just for the firt top hat??? Don't know if they plan on doing it on this one or if they already have.
Posted on 6/5/10 at 5:54 pm to TexTiga
I think their concern is the valves may cause back pressure down towards the reservoir. It would not be a good thing if the valves were closed and the reservoir pressure caused the oil to fissure outside of the well string.
Posted on 6/5/10 at 6:32 pm to GeauxDeep
The situaton going in was they apparently need lots of pressure if they plan to move a significant volume of oil to the ship. To get the pressure they need a good fairly decent seal.
As long as there is oil coming out the bottom then the seal isn't perfect.
How much oil comes out the bottom is a reflection of success but only to a point. The amount of oil we see could look similiar even when things improve or get worse.
Close and valve on top and pressure will increase and we will see more oil going to the ship but also more going out the bottom of the top hat.
As long as there is oil coming out the bottom then the seal isn't perfect.
How much oil comes out the bottom is a reflection of success but only to a point. The amount of oil we see could look similiar even when things improve or get worse.
Close and valve on top and pressure will increase and we will see more oil going to the ship but also more going out the bottom of the top hat.
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