CNPC has applied for patents related to the inspection of hot-melt joints in polyethylene pipes, which can detect various types of defects

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PetroChina has applied for a patent related to the testing of heat-melted joints in polyethylene pipes, which is capable of detecting various types of defects. According to information from the Intellectual Property Office, China National Petroleum Corporation and PetroChina Kunlun Gas Co., Ltd. have filed a patent titled “A Method, System, Equipment, and Medium for Testing Heat-Melted Joints in Polyethylene Pipes”; the publication number is CN120404792A, and the application date was February 2024. The patent abstract indicates that this invention discloses a method, system, device, and medium for testing hot-melt joints of polyethylene pipes. In this method, an isolator is used to adjust the microwave signal source and the microwave probe prior to testing, so as to obtain a microwave signal source and microwave probe that meet the operational requirements ； After the microwave signal source sends the first microwave signal through the polyethylene pipe, the microwave receiver captures the signal information of the second microwave signals emitted from each heat fusion joint at different times; the microwave receiver is built into said microwave probe ； The microwave receiver sends the signal information of the second microwave signal corresponding to each heat-soldered joint to the server ； The signal information includes the position information of each heat fusion joint and the signal reflection parameters ； The server detects the position information and signal reflection parameters in the signal information of the second microwave signal, to identify the target heat fusion joint that meets the abnormality detection criteria. According to Tianyancha, China National Petroleum Corporation was established in 1999 and is located in Beijing; it is a company that is primarily engaged in the exploration and production of oil and gas. The registered capital of the enterprise is 1,830,209.7 million RMB. According to the big data analysis conducted by Tianyancha, China National Petroleum Corporation has invested in 1,285 companies in total, participated in 445 bidding projects. In terms of property-related information, there are 38 trademark records and 5,000 patent records; additionally, the company holds 168 administrative licenses. CNPC Kunlun Gas Co., Ltd., established in 2001 and located in Beijing, is a company primarily engaged in the production and supply of gas. The registered capital of the enterprise is 856 million RMB. According to the big data analysis provided by Tianyancha, CNPC Kunlun Gas Co., Ltd. has invested in 417 companies in total, participated in 802 bidding projects, and holds 63 patent records. In addition, the company possesses 17 administrative licenses.