Date：2022-07-27
Recently, the first multifunctional deepwater manifold independently developed by China has been successfully installed on the seabed in the South China Sea, which fills the technology gap in the independent development, design, manufacturing, testing and installation of deepwater manifolds in China and lays a solid foundation for the extensive application of domestically manufactured equipment in oil and gas projects.
Subsea manifolds are mainly installed between subsea wellheads in offshore oil and gas fields and connected to subsea Christmas trees and oil/gas production platforms through subsea pipelines. Subsea manifolds have multiple functions, such as the collection of oil/gas at the wellhead, distribution of electrical and hydraulic power, and underwater control and monitoring. They are known as the deep-sea oil and gas transfer centers and the core equipment for the development of deepwater oil and gas fields.
Due to the late start of subsea manifold research and development in China, the multifunctional subsea manifolds used in deepwater oil and gas projects in China are designed and supplied by foreign manufacturers, and the overall design of subsea manifolds and the manufacturing of key components have long been monopolized by a few foreign companies.
The multifunctional manifold installed this time is an important component of the demonstration project for the application of subsea oil/gas production systems. It consists of a main body and a protective cover and weighs over 180 tons. It allows for the economic development of oil and gas resources without commercial value for independent exploitation.
For offshore installation, COOEC mobilized “HAI YANG SHI YOU 285”, a 3,000-m deepwater multi-purpose offshore vessel, to provide comprehensive supporting services. The project team has optimized the operation plan, effectively improved the accuracy of alignment, reduced the heading, levelness and inclination deviations, and completed the lifting and accurate positioning of the manifold at the first attempt.