CNOOC Engineering and CNOOC Engineering (Qingdao) apply for patents related to pipeline joint welding to support the intelligent welding of TKY pipeline joints on marine platforms

2026-03-22 09:42:52

March 21 News, the State Intellectual Property Office’s information shows that China National Offshore Oil Corporation (CNOOC) and CNOOC Qingdao Co., Ltd. have applied for a patent titled “An Intelligent Welding Process Method for Marine Platform TKY Pipe Node Saddle Ports.” The application publication number is CN121670081A, the application number is CN202511725558.0, the publication date is March 17, 2026, and the application date is November 24, 2025. Inventors include Tian Lei, Wang Bingming, Zhang Jianli, Yang Fengyan, Zhou Zhenhua, Sun Xiaofei, Dong Lutao, Chen Xin, Xu Wei, and Li Weifeng. The patent agency is Tianjin Sanyuan Patent and Trademark Agency Co., Ltd., with patent agent Hu Wanhua. The classification codes are B23K9/173, B23K9/32, B23P15/00, B25J11/00.

Patent Abstract: The invention provides an intelligent welding process method for the saddle port of the TKY pipe node on a marine platform, belonging to the field of intelligent welding for marine platforms. The method offers technical support for robotic intelligent welding of the TKY pipe node on marine platforms. The steps include: S1: Cutting and processing of the main pipe and connected branch pipes; S2: Assembly, alignment, and positioning welding of the main pipe and branch pipes; S3: Manual root welding and appropriate filling; S4: Surface treatment of welds and grooves; S5: Intelligent MAG filling and cover pass welding. The invention features high welding quality, low labor intensity, and high efficiency, solving the long-standing problem of manual welding of three-dimensional intersecting line saddle ports at the TKY pipe nodes on marine platforms.

CNOOC Engineering was established on April 20, 2000, and listed on the Shanghai Stock Exchange on February 5, 2002. Its registered and office address is in Tianjin. It is a leading enterprise in China’s offshore oil and gas engineering field, providing full industry chain services for offshore resource development with strong technological barriers.

Main business includes providing design, land manufacturing, offshore installation, commissioning, and maintenance services for offshore oil and gas development. It belongs to the Shenwan industry category of Petroleum & Petrochemical - Oilfield Services - Oil & Gas and Refining Engineering, involving concepts such as combustible ice, oil and gas reform, and natural gas.

In 2025, CNOOC Engineering achieved revenue of 27.163 billion yuan, ranking first among two companies in the industry, far surpassing the second-ranked BomiTech with 1.9 billion yuan. The industry average and median are both 14.532 billion yuan. Net profit in 2025 was 2.112 billion yuan, also ranking first in the industry, with the second-ranked BomiTech at 61.45 million yuan. The industry average and median are both 1.087 billion yuan.

Recent patent applications by China National Offshore Oil Corporation (CNOOC) include:

No.	Patent Name	Type	Legal Status	Application Number	Application Date	Publication Number	Publication Date	Inventors
1	Underwater Cleaning Robot Double-Visual Closed-Loop Adaptive Cleaning Brush Plate System	Invention Patent	Published	CN202610154744.1	2026-02-04	CN121650825A	2026-03-13	Xiong Mingyang, He Yakun, Zhao Gang, Li Wei, Huang Zhuangqin, Wang Dan, Wang Haoyu, Zhong Guoqiang, Wang Wei, Ye Jianlin, Zhang Yuanjie, Zhang Jian, Liu Jiying, Li Chengfeng, Yang Pengpeng, Peng Yanqing
2	Modular Connection Device for LNG Land Terminal Transport Beam and Support Column Node	Invention Patent	Effective after substantive examination, published	CN202511845901.5	2025-12-09	CN121407656A	2026-01-27	Yang Jian, Su Juan, Fu Yu, Shen Gang, Zhang Zhaojun, Li Lei, Zhu Guanghui, Li Wenjie, Sun Peng, Hou Xiaomeng
3	3D Seismic Isolation System Design Method for Ultra-Large LNG Storage Tank	Invention Patent	Published	CN202511818066.6	2025-12-04	CN121683227A	2026-03-17	Han Xiaokang, Zhao Menglong, Chen Hang, Zhang Liangfeng, Deng Bin, Xiao Cao, Wang Shun, Zhang Shan, Luo Zhongcheng, Li Yang, Cai Xuesong, Qu Xianqiang
4	Intelligent Welding Process Method for Marine Platform TKY Pipe Node Saddle Port	Invention Patent	Published	CN202511725558.0	2025-11-24	CN121670081A	2026-03-17	Tian Lei, Wang Bingming, Zhang Jianli, Yang Fengyan, Zhou Zhenhua, Sun Xiaofei, Dong Lutao, Chen Xin, Xu Wei, Li Weifeng
5	Single-Point Mooring System Liquid Slip Ring Installation and Testing Device	Invention Patent	Effective after substantive examination, published	CN202511687139.2	2025-11-18	CN121431061A	2026-01-30	Han Yanbo, Liang Guangqiang, Gao Zhilin, Wu Lei, Xiao Wensheng, Zhang Kai, Zhao Hongtao, Lu Xue, Gu Tianbao, Zuo Sheng, Zhang Shousen, Su Sheng’en, Fan Haiyang, Zhu Yi, Li Jianyong, Feng Aimin, Qin Ning, Meng Jiajia, Wei Xiaokang, Gao Zhibin, Liu Chao
6	Sealed Bearing Device for Single-Point Mooring System	Invention Patent	Effective after substantive examination, published	CN202511678498.1	2025-11-17	CN121111988A	2025-12-12	Liang Guangqiang, Han Yanbo, Liu Bo, Zhang Shousen, Wu Lei, Liang Xianchao, Li Tuoyi, Xiao Wensheng, Gu Tianbao, Zuo Sheng, Zhu Yi, Wei Xiaokang, Liu Chao, Ma Bangyong, Zhang Pengfei
7	Method for Achieving Micro-Hardness Regulation of Acidic Sea Pipe GMAW Root Pass	Invention Patent	Effective after substantive examination, published	CN202511641750.1	2025-11-11	CN121491493A	2026-02-10	Sun Youhui, Li Lixia, Yang Xiaofei, Liu Yongzhen, Li Zixuan, Lu Xinyu, Wu Xiaogang, Huang Jiangzhong, Ma Lishun, Zhou Xicheng, Zhao Cuihua, Sun Qiang, Xie Yinan
8	Subsea Plug-in Connector	Invention Patent	Published	CN202511651233.2	2025-11-11	CN121566193A	2026-02-24	Wang Huifeng, Dong Xiaoyu, Jiang Donglei, Zhang Fei, Zhang Xu, Wei Xingchao, Ma Jianqiang, Ren Chenggang, Liu Tongliang, Chen Bin, Su Jian, Li Nan, Wang Yongqiang, Li Bin, Zhang Yangyang, Zhu Lin, Du Xinyu, Gu Xinyu
9	Underwater Conductor Support Structure and Its Dismantling Method	Invention Patent	Effective after substantive examination, published	CN202511644184.X	2025-11-11	CN121573477A	2026-02-27	Wei Jiaguang, Liu Tao, Wang Zhen, Xie Weiwei, Wang Jiqiang, Qin Licheng, Shu Wei, Huang Shantian, Xu Shanzhi, Yang Hua, Wang Xingke
10	Underwater Large Suction Anchor Cylinder Grouping Device and Construction Method	Invention Patent	Published	CN202511641453.7	2025-11-11	CN121607868A	2026-03-06	Yan Bingshuo, Zhong Jibin, Feng Jialiang, Hu Xiaowei, Xu Chenyue, Gao Chaoyu, Gao Yuelong, Ren Guangxin, Liu Bo, Jiang Jia, Zhang Lianshuang, Wu Yixi, Wang Liming, Song Kai, Yu Zaifang, Zhou Bo
…	…	…	…	…	…	…	…	…

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Qianyancha data shows that China National Offshore Oil Corporation Qingdao Co., Ltd. was established on March 8, 2005, with legal representative Xue Shihui. It operates in the construction and installation industry, is a large enterprise with registered capital of 3 billion yuan, and registered address at No. 492 Lianjiang Road, Qingdao Economic and Technological Development Zone. It has invested in one enterprise, participated in 5981 bidding projects, holds 0 trademarks, 876 patents, and has 35 administrative licenses.

Recent patent applications by Qingdao Co., Ltd. include:

No.	Patent Name	Type	Legal Status	Application Number	Application Date	Publication Number	Publication Date	Inventors
1	Gantry Crane Travel Wheel Limit Device	Invention Patent	Published	CN202511924987.0	2025-12-19	CN121698221A	2026-03-20	Sun Wanfeng, Mao Xiangwei, Yang Kejian, Zhang Yongwei, Xiao Jie, Liu Yujie, Dong Lei, Yang Quan, Ding Peijun, Zhang Qincai, Wang Guan, Li Helou, Wang Aiqing, Xu Zhiyong, Xue Shanming
2	Adjustable Offshore Jacket Steel Pile Size Adjustment Auxiliary Device	Invention Patent	Published	CN202511913895.2	2025-12-18	CN121700792A	2026-03-20	Kong Xiangqiang, Ma Yongfeng, Li Shengchen, Guo Qingwei, Wu Chuanxian, Zhao Yang, Zhang Guoya, Mou Linsheng, Wang Peigen, Liu Qigang
3	Deepwater Jacket Steel Pile Device	Invention Patent	Published	CN202511790264.6	2025-12-01	CN121607869A	2026-03-06	Zhang Yao, Huang Dazhong, Liu Chuanhui, Wang Chunbiao, Wang Yong, Ju Xueguo, Yang Fengyan, Gong Chen, Wu Bin, Tian Wangsheng, Wang Dongfeng, Yan Yunqiang, Li Yuanhang, Wang Song, Ma Xiuhe, He and others
…	…	…	…	…	…	…	…	…

[Note: Similar to above, the list continues with detailed patent info.]

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