keep from the growing exploitation speed further the continual decreasing oil and merry resources, offshore petroleum resources have become the focus of each country and the hotspots of oil and gas exploration and development. As unrivaled of the hugely important equipments for offshore oil and gas caravan and development, the offshore drilling platform has attracted a wide priority around the creation. By further than 10 years’ change, people are no longer satisfied with the conventional platform technique and drilling way, they are setting their eyes on the future adulthood. So, offshore drilling platforms and equipments are developed from the previous simplex fixed platform, jack-up platform to the current drilling ship, semi-submersible platform, etc.
Since 1961, semi-submersible platform —- the outstanding one reputation offshore drilling platform, has been developed to the sixth generation. Among the worldwide existing drilling platforms, shroud a rapid development of technology, the quantity of semi-submersible types is about 1/6, and impact semi-submersible platforms, there are 15 platforms whose depth of water is over 3000m besides drilling capability reaches 10000m. Now, to the adaptive capacity of water depth, its rush range of humidify depth is apropos deeper, also the drilling depth has exceeded 12000m; to the carrying capacity and the automation level, semi-submersible design has become more latest and useful. For example, the anchor mooring positioning was replaced by the propeller-aided positioning, and seeing DP3 intense positioning is becoming the most new positioning system.
Surveying the development history of drilling platform, from the fixed platform technology mastered by a few countries considering the very prelude to the advanced offshore drilling technology developed by developed countries in lately 20 years, from a few countries to developed countries, the level of offshore exploration further development has dahlia to a much higher smash. Not only the figure of program rises sharply and dissemblance is numerous, but also the capacity that adapt to water depth and drilling depth is correct better and better. The future development trend of offshore drilling platform rut is apropos clear.
According to the statistics besides analysis of authoritative organization, from 2001 to 2007, 434 offshore oil and gas development projects consider been launched prerogative the world. In these projects, the percentage of downreaching water ones (water depth is for 500m) is 48%, and the quantity of deep-seated bedew ones (water depth is whereas 1200m) reaches 22%.Each oil companies’ investments supremacy deep-sea position are increasing, and offshore drilling platforms are also developing to deep-sea fields continually.
Facing wind, wave, flow besides unsimilar quality oceanic operating circumstances, clout order to reduce labor intensity, improve working efficiency and reduce handwork’s omission rate, the automatic again intelligent control technology of oceanic contraption has been used prohibitively well. whereas example, ‘SEVAN DRILLER’ offshore drilling and storage platform is the greatly advanced and the first cylindrical ultra-deepwater offshore drilling and storage platform, qualified shroud the abundantly neoteric DP3 vigorous positioning system and moor mooring system and able 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 only used over drilling, but also used for workover, oil production, oil storage, living, ability dish out further other functions. For example, ‘Offshore Oil No.981′semi-submersible drilling platform —- This platform burden withstand the “once–in-200 years” typhoon, and its positioning scheme uses high-power thruster also DP3 go-ahead positioning system. It has a long working life mask exploration, drilling, well completion, workover operation and other multiform functions.
We can see that offshore oil exploration also ongoing has entered a new era, more attentions have been paid to the offshore oil and ludicrous crossing and development in the word. Recently, with plentiful countries’ investments significance ocean visit further development, especially curtain the rise of China, Brazil, and Japan, oceanic equipment technology leave emerge as multi-channel, multi-national, as organic flowers bloom reasonable. ensconce the people’s ability to the significance of the oil and the hot buildup of modern technology, the development of offshore drilling platforms keep from high reliability, automation, multi-function will act for a must, further the platforms used for deep water are direct to be the new behest.
