The Actuality And Development Trend Of Offshore Drilling Platform Technology

With the growing exploitation speed and the continual decreasing oil and gas resources

, offshore petroleum resources have become the focus of each country and the hotspots of oil and gas exploration and development. As one of the most important equipments for offshore oil and gas exploration and development, the offshore drilling platform has attracted a wide attention around the world. By more 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 development. 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 in offshore drilling platform, has been developed to the sixth generation. Among the worldwide existing drilling platforms, with a rapid development of technology, the quantity of semi-submersible types is about 1/6, and in semi-submersible platforms, there are 15 platforms whose depth of water is over 3000m and drilling capability reaches 10000m. Now, to the adaptive capacity of water depth, its working range of water depth is becoming deeper, and the drilling depth has exceeded 12000m; to the carrying capacity and the automation level, semi-submersible platform has become more advanced and useful. For example, the anchor mooring positioning was replaced by the propeller-aided positioning, and now DP3 dynamic positioning is becoming the most advanced positioning system.

Surveying the development history of drilling platform, from the fixed platform technology mastered by a few countries for the very beginning 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 and development has rose to a much higher level. Not only the quantity of platform rises sharply and variety is numerous, but also the capacity that adapt to water depth and drilling depth is becoming better and better. The future development trend of offshore drilling platform technique is becoming clear.

According to the statistics and analysis of authoritative organization, from 2001 to 2007, 434 offshore oil and gas development projects have been launched in the world. In these projects, the percentage of deep water ones (water depth is over 500m) is 48%, and the quantity of deep water ones (water depth is over 1200m) reaches 22%. Each oil companies investments in deep-sea area are increasing, and offshore drilling platforms are also developing to deep-sea fields continually.

Facing wind, wave, flow and other complex oceanic operating circumstances, in order to reduce labor intensity, improve working efficiency and reduce handworks error rate, the automatic and intelligent control technology of oceanic equipment has been used very well. For example, "SEVAN DRILLER" offshore drilling and storage platform is the most advanced and the first cylindrical ultra-deepwater offshore drilling and storage platform, equipped with the most advanced DP3 dynamic positioning system and anchor mooring system and able to adapt to the harsh environments which is -20 C.

Offshore drilling platforms are becoming more and more multifunctional. The new-fashioned multi-purpose offshore platforms are not only used for drilling, but also used for workover, oil production, oil storage, living, power supply and other functions. For example, "Offshore Oil No.981"semi-submersible drilling platform ---- This platform can withstand the oncein-200 years typhoon, and its positioning system uses high-power thruster and DP3 dynamic positioning system. It has a long working life with exploration, drilling, well completion, workover operation and other multiple functions.

We can see that offshore oil exploration and development has entered a new era, more attentions have been paid to the offshore oil and gas exploration and development in the word. Recently, with many countries investments in ocean exploration and development, especially with the rise of China, Brazil, and Japan, oceanic equipment technology will become multi-channel, multi-national, as all flowers bloom together. With the people's understanding to the significance of the oil and the rapid 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 deep water are certain to be the new direction.

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by: Chinaogpe

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