China’s Haiji-1 deep-sea casing project completes testing

Haiji-1, Asia’s first 300-meter deepwater pipeline independently designed and built by China, completed installation and testing of all units on Friday, according to the China National Offshore Oil Corp (CNOOC), the the country’s largest offshore oil and gas producer. .

The Haiji-1, located in the basin of the mouth of the Pearl River, in the province of Guangdong (southern China), has a total height of up to 340.5 meters and weighs up to 40,000 tons, setting new records for China’s offshore oil production platform.

“Construction of the project took 28 months, including the construction and installation of a 30,000 ton jacket, eight upper single structures and the laying of 25.6 kilometer subsea pipelines. More than 1,000 people participated in its construction during the peak period.” said Yuan Wei, deputy general manager of the CNOOC Shenzhen branch.

The Haiji-1 offshore oil engineering project is expected to be commissioned in the second half of this year to serve the Lufeng 15-1 oil platform in the South China Sea. Its maximum daily oil production will reach 6,500 tonnes when fully operational.

The design of the project makes it possible to guard against extremely severe sea conditions. Through innovative efforts, the project team overcame a series of problems such as the strong internal wave current, huge sand waves and ridges on the seabed, as well as the precise launching and placement of very large structures in the South China Sea.

“During the Haiji-1 sea trials, we encountered Typhoon Chaba. The team, after reasonably arranging the trial plan by securing work personnel in advance, effectively overcame the impact adverse weather conditions.It took a total of 57 days to complete the testing of 37 major systems, 74 autonomous systems equipment, the fire fighting system and utility systems, laying a solid foundation for the commissioning of the platform,” said Tao Fuwen, general manager of CNOOC’s project arm.

As a major breakthrough in jacket design and a milestone in building a super-large offshore oil and gas platform in China, Haiji-1 will further improve the country’s energy supply and ensure China’s energy security. China.