Comparative Examination of Offshore Structures
PCB 3073 PRODUCTION EXECUTIVE II
JUST OFFSHORE STRUCTURES
MAY 2013 SEMESTER
Lecturer: Dr . ALIYU ADEBAYO SULAIMON
No| Name| ID
1| LUIS FAUSTINO EDU ANGUE| 13973
2| MEHDII NIKFEKR| 15744
3| ELAMIN MOHAMED ELAMIN В | 15795
4| UMOH ETIMBUK BASSEY| 15649
5| SHERZOD KAMILOV| 14181
This kind of assignment will be based upon a comparative analysis of offshore structures.
Set platforms, just like the name indicate are programs that are fixed to the sea foundation. The lower limbs of these platforms are made of cement or metal or in some instances both concrete floor and metallic. These legs extend to the bottom with the sea. It could possibly either end up being fixed or weighed to the sea floor with heavy concrete set ups. In the case exactly where it is considered down by concrete buildings, the large concrete constructions make the lower limbs so weighty that it can easily just lay on the sea flooring without always being set.
Steel Jackets used for fixed programs.
These websites could be manned or unmanned, depending on what size it is as well as its functions. The manned programs are usually very much bigger and contain a living quarters for the workers, on the other hand, the unmanned kinds are usually small , are coupled to the manned types. Unmanned systems are only visited when we have a problem or perhaps work more than has to be completed. Fixed systems are usually made for long term make use of. WATER INTERESTING DEPTH:
Set platforms are often used for shallow water to fairly deep water. The depth for these platforms varies from 500ft to 1500ft. This is because not necessarily economical to build legs long enough for really deep or ultra-deep drinking water.
A set platform inside the North Marine (Photo Credit rating: wiseGEEK). PRODUCTION CAPACITY:
Fixed platforms depending on the size can handle about 50, 500 bbl/d. The extracted liquids from the reservoir go up to the platform by way of risers. MEMORY SPACE:
In case where a fixed platform is close to the shoreline, then the made oil might be pumped right to onshore storage space facilities through pipes put on the ocean floor. In cases where the production site is far from the coast, then the system must consist of large storage tanks which hold the essential oil until it can be further utilized in an olive oil tanker. These storage storage containers are usually under the water collection, where they will sometimes include floatation capabilities which help the woking platform resist the force of waves and current. On the whole, the storage capacity of set platforms might be up to seven-hundred, 000Bbl.
The cost of fixed systems increases significantly with depth. Also, the initial and protection costs for fixed programs are high. This brings the cost to a range of US $ 20- 80 , 000, 000. SAFETY AND RELIABILITY:
Fixed systems are very secure and trusted as it is fixed to the seabed thus it really is firm. This will make fixed websites safe to get long time work with ranging from 10-25 years. JACK-UP RIGS
The raise rig is among the most common just offshore drilling machine. This type of rigs consists of floatable hull with several essudato structure or perhaps cylindrical thighs which can be elevated or lowered to seabed. By continuously lowering the legs, the hull that contain the drilling facilities may be raised over a water. The rig is known as a self-contained drilling package with all the derrick drill floor generally mounted on a cantilever deck which can be forecasted out from the hull over the going location. The rig has independent freedom but the velocity is so slow that is generally towed to locations. The hull condition can be triangular in shape, rectangular or perhaps pentagonal with up to eight legs. The legs could be extended up to 300 feet.
NORMAL WATER DEPTH
This kind of rigs are usually designed for water depths up to 350 feet. however , the moment drilling is essential in marine environments that are deeper than the functions of a jack-up, semisubmersibles and drill boats become a more logical decision for query and advancement operations....
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http://en.wikipedia.org/wiki/Oil_platform#Spar_platforms Recovered (12. summer. 2013)
https://en.wikipedia.org/wiki/Semi-submersible Retrieved (12. 06. 2013)
http://www.lorc.dk/offshore-wind-farms-map/thornton-bank-1 Recovered (12. summer. 2013)
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http://www.essie.ufl.edu/~sheppard/OCE3016/Offshore%20Structures.pdf Retrieved (12. 06. 2013)
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http://www.sciencedirect.com/science/article/pii/S0267726104000168 Gathered (12. 06. 2013)
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