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Message
re: Links to live feeds from remotely operated vehicles (ROV)
Posted on 5/29/10 at 11:27 am to paulie
Posted on 5/29/10 at 11:27 am to paulie
quote:
do like the idea of getting the leak down to one source point instead of multiple points
Thats why I think we could hydraulicly squeeze the riser and shut down the "further away" leaks
1
Posted on 5/29/10 at 11:38 am to the LSUSaint
LINK
Scroll to the C1200. Something like this should be able to be fitted on the riser and just squeeze the MF'er to at least get the further out leaks stopped.
It says this one does up to 12" pipe. So I know there are bigger and stronger our there.
Scroll to the C1200. Something like this should be able to be fitted on the riser and just squeeze the MF'er to at least get the further out leaks stopped.
It says this one does up to 12" pipe. So I know there are bigger and stronger our there.
Posted on 5/29/10 at 11:48 am to the LSUSaint
I'm not sure but the damaged riser may be kinked to close to the top of the BOP in order to have enough space for the crimp method.
Posted on 5/29/10 at 11:49 am to the LSUSaint
quote:
It says this one does up to 12" pipe. So I know there are bigger and stronger our there.
What is the wall thickness of this riser? I've heard that this stuff doesn't squeeze very easily.
Posted on 5/29/10 at 11:50 am to White Roach
Can someone post a link to the feed you guys are watching? I'm not seeing any of that.
TIA.
TIA.
Posted on 5/29/10 at 11:51 am to paulie
I think so also, but pressure is still escaping form the other leak(s) which means the mud could work better if those leaks were cut off from losing pressure. THe more pressure escape points you cut off, the closer you get to being able to force mud down the well.
Posted on 5/29/10 at 11:53 am to White Roach
quote:
What is the wall thickness of this riser? I've heard that this stuff doesn't squeeze very easily.
Hydraulics are stronger than any size pipe you can name. They use formulas to determine force needed to use hydraulics to do the specified work. Squeezing hollow pipe is NOT a challenge for large enough hydraulics.
It wouldn't take much to create a lot more backpressure to get close to equalizing the well pressure and forcing the mud down instead of out the riser. It's take the path of least resistance and they need to build resistance i.e. crimp the riser.
What think you CO?
This post was edited on 5/29/10 at 11:58 am
Posted on 5/29/10 at 11:54 am to ntrcptr
Posted on 5/29/10 at 12:02 pm to White Roach
quote:
What is the wall thickness of this riser?
2 inches.
Posted on 5/29/10 at 12:08 pm to tigerdup07
quote:
2 inches.
damn, I had no idea it was that thick
Posted on 5/29/10 at 12:09 pm to the LSUSaint
quote:
Squeezing hollow pipe is NOT a challenge for large enough hydraulics.
You are surely right. But what could you get down there and around the pipe that would do the job?
Posted on 5/29/10 at 12:10 pm to the LSUSaint
quote:
Hydraulics are stronger than any size pipe you can name. They use formulas to determine force needed to use hydraulics to do the specified work. Squeezing hollow pipe is NOT a challenge for large enough hydraulics.
Is any of this equipment designed to work 5000' below sea level?
Posted on 5/29/10 at 12:12 pm to the LSUSaint
I'm sure BP has thought about the crimp method but have not pursued it for what ever reason. My best guess is that the damaged riser is bent very close to the BOP. Think about it, you have 5,000 feet of riser with all that weight / force bending at the rigid point which is the BOP at the mudline. So the riser is going to bend close to the BOP, probably within one diameter distance of the riser diameter at the BOP. In order to crimp the riser, you need a certain amount of straight run of pipe.
If the mud is soft on the gulf floor, I wonder if they can excavate below the BOP and install the crimp below the BOP? That would seem to be an option further down the line if the LMRP or addtional BOP doesn't work?
If the mud is soft on the gulf floor, I wonder if they can excavate below the BOP and install the crimp below the BOP? That would seem to be an option further down the line if the LMRP or addtional BOP doesn't work?
Posted on 5/29/10 at 12:15 pm to paulie
quote:
I wonder if they can excavate below the BOP and install the crimp below the BOP?
crimping the wellhead would be the worst mistake in the history of the oilfield.
Posted on 5/29/10 at 12:17 pm to tigerdup07
OK. Thanks! Just thinking "outside the box." Looks like what they are trying is the best bet then.
Posted on 5/29/10 at 12:19 pm to Indiana Tiger
quote:
Is any of this equipment designed to work 5000' below sea level?
Hydraulics are wahts running those ROV's probably. But rams don't care what the outside pressure is, they are basically all metal except for the hoses which can stand many tens of thousands of PSI.
Posted on 5/29/10 at 12:21 pm to paulie
quote:
In order to crimp the riser, you need a certain amount of straight run of pipe.
Exactly! So they could at least crimp and cut off the other leaks and that would build more packpressure and give the mud a greater chance of being forced down.
Posted on 5/29/10 at 12:31 pm to the LSUSaint
Looks like to me that they are pursuing first the options that DON'T close off other options. So you would try top kill before the LMRP cap because once you have cut off the riser, top kill is not possible. Trying the LMRP cap does foreclose the crimp theories. I am sure they have a good reason for doing that next.
Posted on 5/29/10 at 12:40 pm to JudgeHolden
Oceaneering has diverless hyd clamps that can work in 10000 ft. Of water. Bp was thinking of using it to hot tap off the riser.
Posted on 5/29/10 at 12:43 pm to MCJeff
Not sure what a hot tap is, but if they have the equipment, why not just clamp the riser, even if it is past the main leak and shuts down the smaller leaks? Leaks are letting pressure escape and they are trying to find ways to increas the pressure to go down the well.
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