【Ten Years of Rapid Development in Chemical Processing Equipment】Completion of the jacket structure for a 25,000-ton capacity oil field at 265 meters depth from 2016 to 2022
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This post was last edited by Desert Fish on 2022-12-13 at 09:41. On December 2, 2022, with the installation of the final segment completed, the main structure of the jacket for the wellhead platform of the Lufeng 12-3 oil field development project, which is overseen by CNOOC Engineering, was finished in the new area. This achievement set a new record for the depth at which offshore oil platform jackets can be constructed through foreign cooperation in China, further enhancing the country’s capabilities in building deep-water oil and gas production equipment as well as its level of cooperation with other countries. The deep-water jacket of the Lufeng 12-3 platform is 265 meters tall and weighs around 25,000 tons. It operates at a water depth of 240.8 meters, and upon completion it will become the third tallest deep-water jacket in Asia, second only to those of the Haixi-1 platform and the Liuhua 11-1 platform, which is currently under construction. The project commenced in July 2021. CNOOC Shenzhen Branch, in collaboration with CNOOC Engineering, gradually overcame six major challenges: the development of technical solutions, schedule management, the joint lifting and assembly of large components at great heights, welding of thick-walled structures, precision control, and safety management. A construction method involving horizontal building, towing onto ships, sliding them into water, and using auxiliary means to keep them aligned was adopted. To date, the project’s safe working hours have exceeded 2.2 million hours.
It is reported that during the construction process, the project team designed and established a 3D control network with millimeter-level precision. Measures such as improving the precision of prefabrication, setting up control points, taking into account welding shrinkage, and employing symmetric welding were used to control deviations. The precision requirements for challenging tasks such as the prefabrication of 187-meter-long conduits, the maintenance of three-dimensional coaxiality for 140 wellheads, and the assembly of multi-node, multi-dimensional fasteners at heights of nearly 100 meters were all met to a standard exceeding the design requirements, with an overall first-pass welding success rate of over 99%. The Lufeng 12-3 jacket is the largest deep-water oilfield jacket under construction for foreign cooperation in the South China Sea during China’s 14th Five-Year Plan period. It represents the first collaboration between South Korea’s third-largest multinational group, SK Group, and CNPC in China. It is also an important project for CNPC in implementing its new energy security strategy of \"four revolutions and one cooperation\" and in actively expanding foreign exchanges and collaborations. This project will significantly enhance China’s capabilities in manufacturing deep-water oil and gas production equipment as well as its level of foreign cooperation, contributing to the creation of a more open and fair global energy governance framework.
The construction period for the jacket of the Lufeng 12-3 project is 19 months, with completion expected in February 2023. Once completed, it will operate in the eastern part of the South China Sea. After going into operation, it will play a key role in increasing oil and gas reserves and production in this area, contributing to the economic and social development of the Guangdong-Hong Kong-Macao Greater Bay Area. It holds great significance for ensuring energy security and enhancing the capacity for deep-sea resource development.
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【Ten Years of Great Development in Chemical Equipment】The summary post is being updated regularly; feel free to join the discussion at https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=3576046 (Source: Haichuan Network – Chemical Industry Trends)