Liu Shujie, one of the company's drilling experts who had arrived on the helicopter, said the men were making final checks on the first deep water subsea Christmas tree developed independently in ...

China's first domestically developed subsea Christmas tree for oil drilling was recently installed and officially put into operation in the South China Sea, breaking the long-term monopoly of ...

Often used on offshore rigs as subsea trees, surface wells are also commonly employed. How Christmas Trees Work Christmas trees are used in oil exploration and production in surface and underwater ...