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I think you are asking why doesn't ocean water go down the well made by a drilling rig or why doesn't the ocean water splash over the rig.
The drilling rig used is in deepwater drilling is a semi-submersible, meaning that part of the rig is under water. But where the people work is pretty high off the water, as much as 75' above the water.
Now, the well must be constructed so water from the ocean can not enter the well, and that oil found miles below the sea floor and under high pressure, does not enter the well. There drill pipe with a bit on the end that turns and makes a hole in the sea floor. But this drill pipe from the rig floor to the ocean bottom is inside another pipe called a marine riser. The marine riser keeps the ocean water from coming inside the well.
The well must be designed so oil doesn't come into the well. As the well is drilled, the driller will circulate a heavy drilling mud, to prevent oil and gas from coming into the well. Also, they will cement in casing (basically large pipes) to keep oil and gas from entering the well. A well may have several pipes, one inside the other, used to seal the well from the formation as drilling progresses.
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What else can I help you with?
Why does lightning spread out on the ocean instead of going straight down?
Lightning spreads out on the ocean due to its conductive properties. As water is a good conductor of electricity, the lightning will disperse horizontally across the surface rather than going straight down to the ocean floor. This allows the electrical charge to dissipate more evenly.
What are three ways that density of ocean can increase?
here are 3 ways... 1) temperature going down 2) the salinity of the water 3) ice blocks...
What speed did the Challenger travel?
When it crashed and it was going down, it was going about 200 miles per hour down into the ocean.
Where do you see the sun going over the Pacific Ocean and go down the Atlantic Ocean?
Panama City
Where water goes after the shower?
down the drain and into the ocean
Why is the water in the sink not going down?
The water in the sink may not be going down because there is a clog in the drain, preventing the water from flowing through.
Why do drains make noise when the water is going down?
Drains make noise when the water is going down because the water hits the drain as the water goes down. The water also is going down at a rapid pace, that makes the same sound as a waterfall. When the water is falling to the direct drain, the water beats on the drain.
What causes water pressure in the ocean?
Water pressure in the ocean is caused by the weight of the water above pushing down on the water below. The deeper you go in the ocean, the greater the water pressure because there is more water above pushing down. This pressure increases at a rate of about 1 atmosphere (14.7 psi) for every 10 meters of depth.
If both food and air enters your mout what keeps your lungs functioning?
whats prevents food from going down your lungs
How much pressure does water increase in a water line going down hill?
Pressure certainly does increase in a water line going down hill. This is because the weight of the water pulls it.
Why is the toilet water not going down?
The toilet water may not be going down due to a clog in the pipes, a malfunctioning flush mechanism, or a problem with the water level in the tank.
Why do you think it is important to know what is happening on the ocean floor?
so we know what is going on down there!
