China National Petroleum Corporation and Kunlun Digital Intelligence applied for patents related to sulfur deposition prediction methods. The sulfur deposition prediction method enables early warning display, assisting production decision-making.

March 30 news, according to information released by the National Intellectual Property Administration, China National Petroleum Corporation, Kunlun Digital Intelligence Technology Co., Ltd., has applied for a patent titled “A Sulfur Deposition Prediction Method Based on Multiphase Flow Simulation and Node Analysis.” The application publication number is CN121744961A, the application number is CN202411360120.2, the application publication date is March 27, 2026, the application date is September 27, 2024. The inventors are Qingchun, Wang Rongde, Zeng Yong, Wang Jianping, Xie Chuan, and Jiang Dawei. The patent agency is Chengdu Xingzhi Patent Agency Co., Ltd., and the patent agent is Chen Liping. Classification numbers are G06F30/28, G06F30/18, G16C20/30, G06F113/14, and G06F113/08.

The patent abstract shows that the present invention discloses a sulfur deposition prediction method based on multiphase flow simulation and node analysis, which relates to the technical field of the oil and gas industry and includes the following steps: building a physical model; running a data flow; establishing a pipeline network topology relationship; sulfur deposition calculation, including: element sulfur solubility calculation, element sulfur precipitation determination, precipitated phase state determination, element sulfur precipitation amount calculation, critical flow velocity calculation, and element sulfur deposition amount calculation; visualization and display. Through sulfur deposition calculation, the system’s approximate distribution of element sulfur deposition is obtained, and at the same time, combined with the running of the data flow, it enables dynamic prediction of element sulfur at specified frequencies. This prediction method enables automatic early warning and visual display, so that business personnel can understand the dynamic distribution of sulfur deposition throughout the system, shifting from passive to active. It has certain guiding significance for on-site prevention of sulfur, control of sulfur, and treatment of sulfur, and it assists in the formulation of remedial measures plans and production decisions.

China National Petroleum was established on November 5, 1999 and was listed on the Shanghai Stock Exchange on November 5, 2007. Its registered address is in Beijing, and its office addresses include both Beijing and Hong Kong. It is a leading company in China’s oil and gas industry. Its core businesses cover oil and gas exploration and development, refining and chemical sales, and more. It has advantages across the entire industrial chain and is highly valuable for investment.

China National Petroleum’s principal businesses include the exploration, development, production, transportation, and sales of crude oil and natural gas, as well as the new energy business; the refining and chemical processing business such as refining of crude oil and petroleum products; sales and trading of refining products and non-oil products; and natural gas transportation and sales. The industry under Shenwan is Petroleum & Petrochemicals - Refining & Trading - Refining & Chemical Engineering. The related concept segment includes mainly polyethylene, Sinopec-related, and the “oil-to-chemical” concept.

In 2025, China National Petroleum’s operating revenue reached RMB 286,446.9 million (28,644.69 billion), ranking No. 1 among 5 companies in the industry, far higher than the industry average of RMB 114,632.7 million (11,463.27 billion) and the median of RMB 75,563.0 million (7,55.63 billion). It leads the second-place company Sinopec by RMB 278,358.3 million (27,835.83 billion). In terms of business composition, refining products account for 68.87%, while natural gas, crude oil, and others each account for certain proportions as well. Regarding net profit, in 2025 it was RMB 172,005 million (1720.05 billion), also ranking No. 1 in the industry, higher than the industry average of RMB 41,165 million (411.65 billion) and the median of RMB 120.568 million (1205.68 million), far exceeding the second-place Sinopec’s RMB 35.25 billion (352.5 billion).

The recent patent status of China National Petroleum Gas Corporation is as follows:

According to Tianyancha data, Kunlun Digital Intelligence Technology Co., Ltd. was established on December 6, 2006, with Chen Zhaohui as the legal representative. Its industry is software and information technology services, with a large enterprise size. The registered capital is RMB 333.3333 million, with paid-in capital also RMB 333.3333 million. The registered address is Room 1501, Gehua Building, No. 1 Qinglong Hutong, Dongcheng District, Beijing. Kunlun Digital Intelligence Technology Co., Ltd. has made external investments in 7 companies, participated in 26,215 bidding and tendering projects. For property clues, there are 244 trademark information entries, 580 patent information entries, and it has 50 administrative permits.

Kunlun Digital Intelligence Technology Co., Ltd.’s recent patent status is as follows:

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