As of July 2014, the market cap for Ocean Rig UDW Inc. (ORIG) is $2,373,752,304.00.
The symbol for Ocean Rig UDW Inc. in NASDAQ is: ORIG.
Ocean Rig was created in 1996.
As of July 2014, the market cap for Transocean Ltd. (RIG) is $15,214,356,270.45.
An oil rig
The substructure is attached to the ocean bed and the structure is built on top of it. On another type of rig is a semi-submersible which is basically a structure on top of a submerged, ballast controlled float which is anchored to the ocean floor. Another type is a jack-up rig which have 3 legs that are jacked down onto the ocean floor.
It wasn't on propose. The oil rig exploded, and the oil spilled into the ocean.
It is believed that the Hibernia is the world's largest rig or offshore platform. It is located on the Jeanne D'Arc basin in the Atlantic Ocean off the coast of Newfoundland, Canada.
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. See related link.
You arrive at the Oil Rig in the middle of the ocean. Jump down and across to the rig, then to the Control Room at the top of the rig. Enter and go to the office, where the supervisor is getting a call from a top secret island location. If you agree to investigate, go back outside and take the helicopter that lands on the roof. (see related question)
The Man's a rig. Nice rig, dude! How will you rig the race this time, boss?
The drilling rig is a semi-submersible platform (not anchored to the sea floor). It has been destroyed by fire and is lying in 5,000 feet of water at the ocean's bottom. As it plunged into the ocean, it drifted and is a good distance (I believe around 1,400 ft) from subsea wellhead. The drilling platform will never be repaired.
Magma erupts along mid ocean ridges forming new ocean floor. Mid ocean ridges are found at divergent boundaries where two ocean plates are pushing apart.