10:25 on May 31st, in the South China Sea, Chinese owned CNOOC CNOOC Engineering "offshore oil 228" barges "and" 12800 tons of upper Wenchang 9-2/9-3 platform, will be firmly embedded in the jacket grounded on the bottom of the sea. The homework for the first time in China to achieve a completely independent design floatover technique, two new achievements of domestic application for the first time, breaking the monopoly of foreign technology.

The upper platform of Wenchang 9-2/9-3 is 83 meters long and 40 meters wide. The area is equivalent to the size of 8 basketball courts, 53 meters high, equivalent to the height of 15 stories, and weighs 12800 tons, which is equivalent to the weight of a light carrier.

"Jerk" such a huge monster of offshore oil 228, still seemed at ease. At 4:30 in the morning, "offshore oil 228" "lift" platform strolled toward the jacket notch "walk", after 3 hours, it will be placed in a precise air jacket octagonal platform and jacket, "sea handshake". For the next 2 hours, the barge pulled out of the jacket trough by double action of tides and ballast. During the operation, the offshore wind force 4, "ocean oil 228" remains calm and steady as a rock.

The floating work by first domestic completely independent design is completed, breaking the monopoly of foreign technology. Chinese CNOOC technical team independently developed LMU (leg docking device) and DSU (upper supporting device) is first applied to the production and implementation of the LMU and DSU localization of key equipment.

Floatover method as a new type of super large offshore platform installation technology, because of its low cost, fast installation, major advantages, has been widely used in the offshore platform installation ton. However, only a few countries in the world have complete floatover technique. After more than 10 years of technological innovation and breakthrough, the key technology in China has successfully overcome the sea uplift, the uplift series and sea area, all-weather. In quantity, grasp the operation difficulty and technical complexity of uplift type etc. are among the highest in the world, skilled use a variety of ways to anchor floatover method, low floatover method, dynamic positioning method for floating offshore installation operation, to achieve the world mainstream floatover "slam". As of now, Chinese CNOOC has 21 times by floatover installation of offshore platform technology, the total installed capacity of about 220 thousand tons, saving the cost of ten billion yuan.

In the field of offshore oil engineering has created a float over installation of three world records: the successful completion of the world's most difficult Liwan 3-1 block uplift installation; successfully installed the world's largest "dynamic positioning floatover of offshore oil platform - Huizhou 25-8DPP platform; the successful installation of the world's largest" low uplift "offshore oil platform - Lufeng 7-2 the platform, creating the world" low uplift method "the deepest working record.

After the platform is put into operation, the gas field group will access the cliff city pipeline through the submarine pipeline and transport natural gas to Hainan, Guangdong, Hongkong and other places.

CNOOC engineering president and party secretary Jin Xiaojian said, the company production offshore installation is key to high risk and high investment chain, the CNOOC engineering operation depth has increased to 1500 meters, successfully enter the international deep-water club "". CNOOC engineering will be closely linked to "Chinese manufacturing 2025" development plan, seize the opportunity, "The Belt and Road 'continuous efforts in building high-end marine products, and strive to become a world-class offshore oil and gas engineering of EPCI general contractor."