Recently, the world's first subsea two phases wet gas flow meter device based on ultrasound technology was developed by the research group led by Professor Xu Ying of the School of Electrical and Information Engineering at Tianjin University, which has passed the type approval of China Classification Society and made it official.

The device has reached the international advanced level in the key technical indexes such as design pressure, temperature, water depth, gas content range and measurement accuracy. Subsea two phases wet gas flow meter device is the key equipment in the development of deep-sea oil and gas field, and its successful development breaks down the foreign technical barrier, which has great practical significance for the localization of the key equipment in the deep sea in China.

It is forecast that about 50 percent of the world's oil-gas resources will come from the oceans. However, deep-water equipment is limited by harsh working conditions and high installation and use maintenance costs, and the life of key equipment in underwater production systems usually requires more than 20 years, so many key components of China's deep-sea equipment can only be imported. The price of a single station, such as an underwater meter, can reach millions of dollars, and only four companies in the world have a monopoly on the international market. Moreover, the most key sensing component based on the source of nuclear radiation can only be imported.

The successful subsea two phases wet gas flow meter device of Professor Xu Ying has solved this problem. Its scheme is to combine the ultrasonic technology with abnormal Venturi technology and make use of their particularity and advantage in moisture measurement forming complementarity, so the organic fusion of differential pressure and velocity flow measurement principle is realized. In the aspect of structural design, the abnormal Venturi adopts the multiple perforation pressure and implicit annular conduction pressure patent design structure. At the same time, it breaks through the design thought of the original import of the key sensing components such as pressure, temperature and differential pressure as the basic unit module of flowmeter, and saved the cost greatly. The technology can be used to reduce the cost of equipment manufacturing to about RMB 500,000 after actual production.

By: School of Electrical and Information Engineering

Editor: Qin Mian