The world's first ultrasonic technology underwater two-phase wet gas flowmeter was successfully developed

[ China Instrument Network Instrument Development ] Recently, the world's first underwater two-phase moisture flow measuring device based on ultrasonic technology, which was developed by Professor Xu Ying of Tianjin University, was officially released through the type approval of China Classification Society CCS.

In the process of natural gas collection, the pipeline is often accompanied by liquid media such as condensate and formation water. The traditional measurement method for terrestrial oil and gas fields is to build thousands of square meters of gas collection and measurement stations, and separate the wet natural gas into gas and liquid to obtain the measurement results.

However, due to the limited working conditions such as high pressure, sealing, anti-corrosion, fluid medium temperature, pressure, flow variation range and high installation, maintenance and operation cost constraints, the service life of key equipment in underwater production systems is usually required. For more than 20 years, many key components of deep sea equipment in China can only rely on imports.

The price of a single underwater flow meter is as high as several million dollars, and only four companies worldwide monopolize the international market. Not only that, but these products rely on nuclear ray technology without exception, and the most critical sensing components based on nuclear ray sources can only rely on imports.

After more than ten years of independent research and development, Professor Xu Ying's independent research and development combines ultrasonic technology with heterogeneous venturi technology, and uses their specialities and advantages in moisture measurement to complement each other and realize differential pressure and velocity flow. Organic integration of measurement principles. In terms of structural design, the heterogeneous venturi adopts the patented design structure of multi-perforation pressure and built-in annular pressure guide, and successfully developed a moisture two-phase flowmeter, which can measure the real-time gas and liquid flow without gas and liquid separation.

At the same time, the moisture two-phase flowmeter breaks through the design idea that the key sensing components such as pressure, temperature and differential pressure are imported as the basic unit module of the flowmeter, which greatly saves the cost. After the technology is applied to actual production, it can be Equipment manufacturing costs fell to around RMB 500,000.

The device has reached the international advanced level in designing key technical indicators such as pressure, temperature, water depth, gas content range and measurement accuracy. The underwater two-phase moisture flow measuring device is a key equipment in the development of deep-sea oil and gas fields. Its successful development has broken the technical barriers abroad and has great practical significance for the localization of key equipment in deep sea equipment in China.

According to reports, the device has been successfully applied to many shale gas fields, condensate gas fields, tight sandstone gas fields and low-permeability gas fields in China, which has greatly reduced the cost of natural gas production.

(Source: Science and Technology Daily, Tianjin Daily, China Youth Daily)