China National Petroleum Corporation has been granted an invention patent for \"A method, apparatus, and equipment for determining the coal powder concentration in the production fluid of a coalbed methane well.\"
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According to data from the Tianyancha app, China National Petroleum Corporation (601857) has newly obtained an invention patent grant. The title of the patent is “A Method, Device, and Apparatus for Determining the Coal Powder Concentration in the Fluids Produced from Shale Gas Wells”; the patent application number is CN202110446329.0, and the grant date is August 5, 2025. Patent Abstract: This text provides a method, apparatus, and equipment for determining the coal powder concentration in the fluid produced from coalbed methane wells. The method includes obtaining the flow rate value of the fluid produced from such wells as well as the corresponding density value of that fluid ； Based on the flow rate value of the produced fluid and its corresponding density value, the density value of the produced fluid in a stationary state is calculated ； Based on the density value of the produced fluid in the stationary state, along with a predefined conversion function relating the density of the produced fluid to the coal powder concentration in that state, the coal powder concentration in the produced fluid can be calculated. This approach allows for the direct conversion between concentration and density, thereby avoiding the need for secondary conversions through intermediate parameters as in existing technologies, and improving the accuracy of measuring the coal powder concentration. Since the beginning of this year, China National Petroleum Corporation has obtained 746 new patent approvals, a decrease of 49.36% compared to the same period last year. Based on the financial data from the company’s 2024 annual report, the company invested 23.014 billion yuan in research and development in 2024, representing a 4.77% increase compared to the previous year. According to Tianyancha’s big data analysis, China National Petroleum Corporation has invested in 1,285 companies in total and participated in 445 bidding projects ； Regarding property-related clues, there are 107 trademark records and 30,621 patent records ； In addition, the company holds 168 administrative licenses. China National Petroleum Corporation has been granted an invention patent for \"A method, apparatus, and equipment for determining the coal powder concentration in the production fluid of a coalbed methane well.\"
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