harbour the growing exploitation speed and the continual decreasing oil and ridiculous resources, offshore petroleum resources consider become the focus of each tract also the hotspots of oil and gas crossing and developing. since one of the most important equipments for offshore oil and gas exploration and development, the offshore drilling platforms has impressed a wide attention around the world. By more than 10 years’ change, people are no longer satisfied with the casual intendment technique also drilling way, they are setting their eyes on the impending buildup. So, offshore drilling platforms and equipments are developed from the previous simplex inbred platform, jack-up angle to the current drilling ship, semi-submersible platform, etc.
seeing 1961, semi-submersible platform —- the outstanding one in offshore drilling platform, has been developed to the sixth generation. Among the worldwide fashionable drilling platforms, with a rapid adding to of technology, the digit of semi-submersible types is about 1/6, and in semi-submersible platforms, there are 15 platforms whose depth of water is over 3000m besides drilling capability reaches 10000m. Now, to the adaptive qualification of water depth, its working range of water depth is becoming deeper, besides the drilling depth has exceeded 12000m; to the carrying capacity and the automation level, semi-submersible platform has incline more advanced and useful. through example, the anchor mooring positioning was replaced by the propeller-aided positioning, and now DP3 dynamic positioning is useful the most topical positioning system.
Surveying the development history of drilling platform, from the fixed project technology mastered by a few countries for the very beginning to the cutting edge offshore drilling technology developed by developed countries in lately 20 years, from a few countries to developed countries, the break down of offshore exploration and development has rose to a much higher level. Not only the numeral of platform rises sharply and variety is numerous, but also the capacity that adapt to wet depth and drilling depth is fitting better and sophisticated. The future development trend of offshore drilling platform technique is becoming clear.
According to the statistics and analysis of sovereign organization, from 2001 to 2007, 434 offshore oil and gas development projects have been launched leverage the world. network these projects, the percentage of deep water ones (dampen depth is over 500m) is 48%, and the quantity of deep dampen ones (wet depth is over 1200m) reaches 22%. Each oil companies’ investments in deep-sea area are increasing, and offshore drilling platforms are also up to deep-sea fields continually.
Facing wind, wave, flow again altered constitution oceanic operating circumstances, moment decree to decrease labor intensity, improve working efficiency also reduce handwork’s error rate, the automatic and acute manage technology of oceanic equipment has been used notably totally. For example, „SEVAN DRILLER” offshore drilling and storage platform is the most advanced again the highest cylindrical ultra-deepwater offshore drilling also storage platform, equipped with the most modernistic DP3 red-blooded positioning system further anchor mooring system also practical to adapt to the harsh environments which is -20 ° C.
Offshore drilling platforms are becoming more again more multifunctional. The new-fashioned multi-purpose offshore platforms are not individual used thanks to drilling, but also used for workover, oil production, oil storage, living, qualification supply further other functions. for example, „Offshore Oil No.981″semi-submersible drilling platform —- This method pledge withstand the „once-in-200 years” typhoon, and its positioning system uses high-power thruster also DP3 dynamic positioning silhouette. true has a long working life with exploration, drilling, well completion, workover operation also contradistinct multiple functions.
We contract see that offshore oil exploration also development has entered a new era, supplementary attentions have been paid to the offshore oil and killing exploration and adding to consequence the word. Recently, with many countries’ investments connections ocean migration besides development, especially eclipse the rise of China, Brazil, and Japan, oceanic equipment technology cede become multi-channel, multi-national, as all flowers grace smart. With the people’s endowment to the significance of the oil and the hair-trigger development of modern technology, the development of offshore drilling platforms with high reliability, automation, multi-function will be a must, and the platforms used for immersed water are expressed to stage the more direction.
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