通过对国内外水下采油树应用情况资料调研，得知水下采油树在国外油气田开采中应用广泛，技术非常成熟，最大安装水深超过2700 m。而国内目前仅有包括流花11-1等少数几个油气田采用水下采油树进行开采，水下采油树的设计、制造、安装、施工等技术基本由国外少数几家公司掌握，目前尚无国产水下采油树应用于海上油气田的实例。为满足我国油气田开发向深海发展的需要，国内石油公司应利用现在与国外合作项目的机会提高我国水下采油树的设计制造、施工安装水平及使用维护能力。

Conducted is investigation and study on practical application situation of undersea Christmas tree at home and abroad and results show that undersea Christmas tree is a very mature technology and has been widely used in international oil and gas field exploitation, its maximum installation depth may be deeper than 2700m. At present, the technology is applied in a handful of oil and gas fields in China, its design, manufacture, installation and construction techniques are grasped by not many foreign oil companies. Up to now, there is no example of application of domestic undersea Christmas tree in offshore oil and gas field exploitation. Domestic oil companies shall seize the opportunity of cooperating with foreign oil companies and improve the abilities in design, manufacture, installation and maintenance of undersea Christmas tree so as to meet the demand of deep sea oil and gas field exploitation.