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In general that hole (safety valve) where the oil poured torrents from is located at a depth 1,5 km. It's rather dangerous and difficult for underwater works. You ought to know that even military submarines don't swim in such depth. Water pressure is 150 atm.
But the underground point where the oil is comes the safety valve from is located on the depth 5,5 km! The pressure is 500 atm - it means 500 kg to one square cm. But the OIL pressure is 8 tons to sq.centimeter. It's really impossible to plug the hole with such hell pressure our modern technologies by yet.
The thickness of the oil emulsion on the surface of Gulf is 1,1 micron. This means that the natural evaporation of water from the surface completely paralyzed. And this means that we have big problem with water cycle in this region and of cause in the whole world.
Oil rises from the bottom to a depth of 700 meters. Lighter fractions of oil float to the surface of the ocean and then carried by undercurrents oceans around the world. Gulfstream is already bringing oil to the northern ice cap and the shores of Europe. It is highly probable that the Gulf Stream will stop because the 1 million square kilometers of the Atlantic Ocean will soon be covered with oil membrane.
Now this oil company is preparing to use nuclear weapons.