采油树是自喷井和机采井等用来开采石油的井口装置。它是油气井最上部的控制和调节油气生产的主要设备，主要有套管头、油管头、采油（气）树本体三部分组成。
安装采油树是要对角上紧螺栓。
Make up and tighten the bolts diagonally when the X-tree is installed.
此种采油树在塔里木探区推广应用十多井次，使用效果良好。
This type of production tree has been applied in tarim oilfield for more than ten wells and achieved a better result.
由单个阀门组成的装在自喷井上的采油树。它不是由整体金属块制成。
Christmas tree on a flowing well that is made of individual valves instead of manufactured out of a solid metal block.
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