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CNOOC Engineering Applied for Tension Measurement Device Patent, Real-time Measurement of Tension Tendon Tension, Dual-system Cross-verification Easy to Maintain
March 21 News, the State Intellectual Property Office’s information shows that China National Offshore Oil Corporation (CNOOC) has applied for a patent titled “Real-time Tension Measurement Device for Tension Legs Platform Tendons.” The application publication number is CN121702593A, the application number is CN202511571934.5, the publication date is March 20, 2026, and the application date is October 30, 2025. The inventors are Deng Shi, Fan Shuwei, Li Shuai, Yang Xiaolong, Zhang Shiyuan, Zhang Fafu, Liu Xuping, Zhang Guanglei, Chen Zhongge, Ma Bangyong, Kong Fanxu. The patent agency is Tianjin Sanyuan Patent and Trademark Agency Co., Ltd., with patent agent Hu Wanming. The classification codes are G01L1/24 and G01L5/00.
Patent Abstract: The invention discloses a real-time tension measurement device for tendons of a tension legs platform. The device includes a rocker arm, a first shackle, and a second shackle, with the first and second shackles connected at opposite ends of the rocker arm. The first shackle is connected to the platform, and the second shackle is connected to the tendon, positioning the rocker arm between the platform and the tendon. The rocker arm is equipped with a first fixed block and a second fixed block, connected via a tension adjustment arm, which in turn is connected to an optical fiber force sensor. When the rocker arm undergoes micro-deformation, the tension adjustment arm deforms synchronously, and the optical fiber force sensor outputs signals through a cable to measure the tension of the tendon. The invention provides a system with two measurement setups for verification, simple structure, easy operation, and convenient maintenance and replacement.
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 oil and gas development, with strong technical capabilities and extensive project experience.
Main business includes providing design, onshore manufacturing, offshore installation, commissioning, and maintenance services for offshore oil and gas resources. It belongs to the Shenwan industry category of 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 include:
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