Question:
WHAT IS DRILL SHIP?
ITS FUNCTIONS
WHAT ITS MADE OFF
Answers:
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Yankee Sailor gave you the basic scoop.They are also self-propelled, other wise they are called. 'Drill Barge'. Initially they were moored on eight anchors to hold station and minimize the possibility of 'drifting off location'.
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Early Drill Ships were converted from existing ships. Today there are very specialized purpose built drill ships for deep water drilling in water depths up to 10,000 ft.
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The drill string suspended from the Derrick extends to the sea bed through the 'Moon Pool' a hole in the center of the ship.
While this worked fine in a prevailing sea and wind, it became difficult with 'beam seas' when the sea and wind direction were inconsistent.
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The first solution to counter this was to mount the anchor windlass on a rotating turret, moon which allowed the ship to maintain heading as required.
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The second solution was 'Dynamic Positioning in which the ship can 'hold station' by thrusters mounted bow, mid ships and stern. These are often rotating nozzles for maximum efficiency.
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The other unique function of all floating drilling vessels is their vertical position relative to the seabed is constantly in motion due to wave and tidal action. Consequently any device suspended from the vessel has to be compensated when it is in contact with the seabed.
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The best known or at least most unique, would be:
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the Joides Resolution, http://www-odp.tamu.edu/resolutn.html,... operated by the Ocean Drilling Program (ODP) a scientific group composed of 21 - 23 (?) countries. They've drilled/cored in 29,000 ft water depth trying to find a sample of the earth's mantle. It's predecessor was the Glomar Challenger, http://www-odp.tamu.edu/glomar.html...
Deepest penetration beneath ocean floor 1,741 m
Maximum penetration into basaltic earth crust 1,080 m
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The (Hughes) (CIA) Glomar Explorer, http://www.fas.org/irp/program/collect/j...
It's original role was to raise a sunken Russian Submarine. The design was ahead of technology at time. The entire derrick compensated for vessel motion. People who served on it say it was a maintenance nightmare. It faced long retirement following the sub-retrieval mission. A recent make-over has given it a new lease on life.
Drill Ship, is often the phrase used for a ships company to partake in PT whilst a ship is at sea.
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a drill ship is used in deep sea oil exploration and drilling....300-500 foot long, made of steel, with a big derrick tower in the middle that can drill down 20-30,000 feet ..yes thats right thousands of feet...to find oil deposits under the sea floorIf I make a raft with several Flymo lawn mowers would I be able to float it across a lake?
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