What are the current situation and existing problems in the introduction of manufacturing technology for offshore engineering equipment in China?

In recent years, due to China's emphasis on the offshore market and the great temptation of new financing methods to foreign oil companies and investment companies, China has undertaken huge offshore orders (mainly self-elevating, except Raffles), so many people in the domestic industry are also jealous of the high profits of drilling packages. At present, I know that there are two domestic offshore drilling contractors: TSC and Honghua. It is against this background that I began to try to contract offshore drilling packages. Briefly introduce these two companies. TSC has been established for more than ten years. At first, it sought technical solutions from onshore drilling equipment suppliers such as Baoji and Gemstone, and learned from the experience of mainstream offshore drilling platform suppliers. Most drilling equipment, such as mud pump, large winch (without compensation) and rotary table, are produced by ourselves, and high-end drilling equipment (top drive, diverter, iron roughneck, etc. ) was acquired and integrated to expand the market. There are 8-9 platforms that have been delivered so far. Honghua is an old supplier of onshore oil drilling equipment in China, with very good benefits and reputation. At present, it has begun to set foot in the supply of offshore drilling packages, and the product level is not much different from TSC, and the supply scope is basically the same. In recent two years, Honghua has specially built a shipyard and built a 25,000-ton gantry crane to hoist the deck box of Semi. It can be seen that their market positioning is different from TSC. Generally speaking, the main features of the equipment of these two newly rising domestic drilling platform suppliers are: low cost, insecure construction period, high repair rate, poor compliance rate of parameters (especially tonnage), heavy (the characteristic of onshore oil equipment is that it does not need to consider the bearing capacity of the platform, and it is generally overweight), and high-tech equipment is unable to produce (such as top drive, iron thick neck, diverter, drill chair and display, Mani).