Deepwater drilling and completion technology of China National Offshore Oil Corporation

The development history of deepwater engineering technology of China National Offshore Oil Corporation has been reviewed and the development direction of deepwater engineering technology in China has been discussed. After the entry into the 21st century, China National Offshore Oil Corporation has accelerated the march towards the deepwater field, and had also attached great importance to the investment scale, technical reserve, talent cultivation and other aspects. It gradually formed three systems, namely, deepwater technology, deepwater scientific research and deepwater management, constructed the drilling equipment suitable for different water depth gradients via the operation practices at home and abroad, which possessed the international and domestic deepwater self-support operation capacity, accumulated the organization management capacity of deepwater practices, and had achieved the leapfrog from "deepwater" to "ultra-deepwater" within 5 years.