The world’s first ultrasonic technology underwater two-phase wet gas flow meter has been successfully developed.

This device has reached high levels in key technical indicators such as design pressure, temperature, water depth, gas holdup range, and measurement accuracy. The underwater two-phase wet gas flow measurement device is a crucial piece of equipment for deep-sea oil and gas field development. Its successful development has broken through foreign technological barriers and has significant practical significance for the domestication of key equipment in China's deep-sea gear. According to predictions, about 50% of future global oil and gas resources will come from the ocean. However, due to harsh working conditions and high installation, usage, maintenance, and operational costs, the key equipment of underwater production systems typically requires a lifespan of over 20 years, leading to many critical components of China's deep-sea equipment being dependent on imports. For example, the price of a single underwater flow meter can reach several million US dollars, and only four companies monopolize the market. Moreover, the nuclear radiation source, a very critical sensing component, can only be imported. The underwater two-phase wet gas measurement device developed by Tianjin University has solved this problem. The solution integrates ultrasonic technology with unconventional Venturi technology, utilizing their unique characteristics and advantages in wet gas measurement to complement each other, achieving an organic combination of differential pressure and velocity-based flow measurement principles. In structural design, the unconventional Venturi employs a multi-perforated pressure-taking and internal annular pressure-guiding patented design structure. Additionally, it breaks away from the original design concept of using imported pressure, temperature, and differential pressure sensors as basic modules of the flow meter, significantly reducing costs. After applying this technology in actual production, the manufacturing cost of the equipment can be reduced to approximately 500,000 RMB.