技术以ABB、Krohne和横河三家厂商为主要代表。 At present, foreign electromagnetic flowmeter technology is mainly represented by three manufacturers: ABB, Krohne and Yokogawa. Domestic manufacturers' technology is generally derived from ABB technology. Krohne low frequency rectangular wave excitation type electromagnetic flowmeter is mainly a large-caliber product, which is widely used in the water industry. Yokogawa's dual-frequency excitation technology, especially for small diameter products below 100MM, has a high share in the paper industry. In 2008, the overall market size of electromagnetic flowmeters was 730 million. The top three KROHNE, YOKOGAWA, and E + H accounted for 45% of the market, and their market shares exceeded 10%. Chuanyi, Kaiyi and ABB are representative manufacturers of the second echelon. Although the performance is less than 10%, it has grown rapidly. Other market shares are less than 5%, but Siemens' growth in the process industry in recent years should not be underestimated. The undisputed leader in the mass flow meter market is EMERSONMICROMOTION. Although other manufacturers such as YOKOGAWA, KROHNE, etc. have their own mass flow meters, the market sales are far inferior to EMERSON. No matter from the technology or the market, it is a myth created by EMERSON. However, in recent years, these companies have strengthened the promotion of mass flow meters, and the situation of one dominant company may change in the future. Domestic mass flow meter research and development has not stopped, but due to some limitations of the state-owned system, the nature of the technology has overwhelmed the form. On the other hand, the mass flow meter technology is indeed more difficult than electromagnetic and vortex streets, so The mass flow meter has never been developed, and the only two are currently at the level of ten million. Its applications have not yet entered the mainstream market.
是油水井剖面测井的主要仪器之一，它录取的流量曲线的精度和准确性是保证测井资料解释获得较高正确率的重要前提。 Electromagnetic flowmeter is one of the main tools for oil and water well profile logging. The accuracy and accuracy of the flow curve recorded by it is an important prerequisite to ensure a high accuracy of interpretation of logging data. The turbine flowmeters used in the past have design defects, are easy to be contaminated, and have a large working displacement, which makes the accuracy of the curve measurement obtained low. In response to this reality, researchers from the logging company have carried out scientific and technological research on anti-contamination and reduction of working displacement. They have retrofitted the electromagnetic flowmeters previously used. By using new materials and redesigning the flowmeter structure, they have developed a technology that can prevent A new type of anti-magnetic contamination turbine flowmeter with contamination in the well and reduced startup displacement. Field test data show that the flow curve obtained with the new flowmeter is smooth and clear, the working displacement is low, and the interpretation accuracy is high.
无法用于高污染、复杂井况测井的技术空白，达到了国内领先水平，具有很大的推广应用前景，已经通过局科技部门审核。 The new flowmeter fills the technical gap that the original electromagnetic flowmeter cannot be used for high-pollution and complex well logging. It has reached the domestic leading level and has a great prospect for promotion and application. It has passed the review by the Bureau of Science and Technology. Currently, researchers are actively applying for national patents.