Important breakthrough! The longest deep-water oil and gas pipeline in China has been laid and completed, at the bottom of the South China Sea | Pipeline | China
Important breakthrough! The longest deepwater oil and gas pipeline in China has been laid and completed.
Today, the key control project of "Deep Sea One" Phase II, the submarine long-distance pipeline, has been completed in the Lingshui area of Hainan. This is the longest deepwater oil and gas mixed transportation pipeline in China. Its completion marks an important breakthrough in China's ability to lay deepwater long-distance submarine pipelines and ultra deepwater equipment technology.
The submarine pipeline of the Phase II project of Deep Sea One is the main artery for oil and gas transportation between the Phase II project and the onshore oil and gas receiving station. It uses a 20 inch submarine pipeline with a total length of 115.5 kilometers. This includes 114 kilometers of deepwater large-diameter seamless steel pipes and 1.5 kilometers of deepwater bimetallic composite pipes, both of which are the first applications in deepwater environments in China.
Submarine pipelines are the main way of transporting oil and gas in the ocean, and as the water depth increases, the difficulty of engineering construction increases exponentially. The second phase of the "Deep Sea One" project is located in a sea area with very complex geological conditions, including various complex terrains such as steep seabed slopes and large areas of sand slopes and ridges. It is the largest underwater pipeline in China with the largest water depth span, posing great challenges to engineering design, ship equipment capabilities, and offshore installation technology.
Guo Qing, Project Manager of the Phase II Project of "Deep Sea One"
![Important breakthrough! The longest deep-water oil and gas pipeline in China has been laid and completed, at the bottom of the South China Sea | Pipeline | China](https://a5qu.com/upload/images/5b1d37aa83ce0ec9c1c7024345559bb2.jpg)
We have successfully solved the technical difficulties of world-class submarine pipeline engineering such as ultra long, ultra high, and suspended spans. We have independently developed the first set of fully automatic welding equipment technology for large diameter and thick wall submarine pipelines in China, achieving more than 10 technological breakthroughs. During construction, we have set a record for the fastest laying length of 2.65 kilometers per day for 20 inch deep-water pipelines in China.
The second phase of the "Deep Sea One" project is about 132 kilometers away from Sanya, Hainan, with a proven geological reserve of 50 billion cubic meters of natural gas. After production, it can increase the peak annual production of the "Deep Sea One" atmospheric field from 3 billion cubic meters to 4.5 billion cubic meters, making it an important gas source to ensure China's energy security.