Exploration No.3 drilling platform is the first offshore semi-submersible oil drilling platform designed and independently developed by China. It was delivered in June 1984. In the past 30 years, it has traveled all over China's East China Sea and South China Sea, Myanmar Sea and Russian Sakhalin Sea. In cooperation with domestic and foreign oil and gas companies, several oil and gas fields have been discovered in the East China Sea and the South China Sea, which has made great contributions to the national exploration and development of offshore high-yield oil and gas fields.

Under the strict monitoring of the safety system, there has never been a safety accident on Exploration No.3 drilling platform, which has continuously created remarkable safety production achievements. China's first offshore high-temperature and high-pressure directional well was successfully completed in the South China Sea. The qualified rates of wellbore quality, cementing quality and wellhead quality all reach 100%. There is no engineering scrap and responsibility rework footage, and the equipment integrity rate is 99.7%. The operating efficiency and safety level rank first among domestic semi-submersible drilling platforms.

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