双油管采气/压裂树总成

l采油树主要由套管头、油管头、上法兰、四通、闸阀和节流阀组成，采油（气）树可分为单翼或双翼结构形式；

l井口装置和采油树可配置井下安全阀、井上安全阀、气动或液动控制系统，实现远程自动控制开井或关井；

l节流阀形式：可调式或固定式节流阀

l The Christmas tree mainly consists of casing head, tubing head, adapter flange, cross, gate valve, and choke valve. Petroleum（Gas）production tree can be both single or double wing structures.

l In order to realize remote control, wellhead tree can be completed with DSV, SSV, pneumatic &hydraulic control systems.

l choke valve type : adjustable or positive .