Skip to comments.BP deploys top hat at spill site as hearings continue (Deepwater Horizon Well)
Posted on 05/12/2010 10:52:57 AM PDT by Ernest_at_the_Beach
/quotes/comstock/23s!a:bp. (UK:BP. 541.60, -3.90, -0.71%) isn't sure if it'll stop the spill, said BP spokesman Matt Taylor.
Unlike a larger containment dome attempted over the weekend, the four-foot-wide device allows injections of methanol and hot water to prevent clogging from hydrates. Hydrate crystals form under high pressure and cold temperatures in ocean waters a mile deep, where water combines with gases such as methane.
BP said the top hat arrived on site on a boat called Poseidon, normally used for carrying remotely operated vehicles
Before it was dropped into the water, the top hat was wired up to the drill ship, with a drill pipe and a riser. The drill pipe sits inside the riser, which will be heated with hot water.
"All of the techniques being attempted or evaluated to contain the flow of oil on the seabed involve significant uncertainties because they have not been tested in these conditions before," BP said.
(Excerpt) Read more at marketwatch.com ...
Do they have divers and submersibles guiding these things they’re dropping down there? What happened to the wreck of the rig?
Just getting to this topic?
Thank you for the clarification. News isn’t telling me anything but failure at every turn. I’m sorry now I didn’t read the article.
Although the OilDrum website seems to be busy or having trouble at the moment.
The situation in the Gulf, in regard to the Deepwater Horizon fire and oil spill continues to evolve. Since my last post on this, the size of the operation has continued to grow, with some thought now being given to dredging barriers along the coastline. What I thought I cover a little today, among other things, is the problems that occur when oil leaves a hot reservoir and suddenly enters a pipe on the floor of a very cold sea, causing some of the constituent chemicals to crystallize out. To illustrate this, I took a picture of one of the pipes that used to sit in my office, since it helped visualize a problem we had been given, and is along the lines of that now facing BP.
You will note that the crystals have reduced the effective diameter of the pipe down to about 1.5 inches, cutting the flow the pipe can carry by 75% (roughly). These are but one example of a number of different chemicals that can precipitate out in the pipes that carry oil from the reservoir, where it is hot, up through colder zones as it rises through the different pipes on its way to land. There are two different aspects to the problem that I want to cover since it relates to the formation of methane hydrates in the capture box that BP had fielded at the end of last week.
The first of these is on the growth of the crystal hydrates within the confinement box that BP had lowered over the middle leak in the riser. However, rather than dig back into my notes, I am going to suggest that those who want to understand the chemistry/physics go to The Obligate Scientist. He uses a plot from the USGS to illustrate the conditions that transition methane gas to methane hydrate as a function of temperature and pressure (depth in the ocean).
Thanks for the informative links, Ernest! I feel like I’m just about up to speed, now.
There is a lot to wade thru.
Another recent thread:
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