介绍了水下油气行业中水下采油树的主要界面。论述了各界面相应的要求。对水下采油树同一界面中的两种接头进行了对比,探讨了这两种接头的优缺点,并结合实际经验提出了这两种接头的适用环境。 The main interface of subsea tree in submarine oil and gas industry is introduced. The corresponding requirements of each interface are discussed. The comparison of the two kinds of joints in the same interface of the subsea tree is carried out. The advantages and disadvantages of the two kinds of joints are discussed, and the applicable environment of the two kinds of joints is put forward based on the practical experience.