定向开启阀安装于350℃高温热采封隔器上端面，下端通过螺纹与封隔器相连。定向开 启阀下放至设计深度后，通过环空打压，压力进入定向开启阀腔内，推动活塞杆下行，剪断 剪钉，活塞连接帽破坏石墨环，实现地面控制定向开启阀的开启，且定向开启阀一旦打开将 无法关闭，只有在注热排气阀无法正常开启时使用。

主要特性

◎ 环空打压实现开启； 

◎ 金属对金属密封可靠，寿命长；

◎ 标准的API连接螺纹。

DIRECTIONAL OPENING VALVE

INTRODUCTION

The directional opening valve is installed on the upper end surface of the 350℃ thermal injection packer,  and the lower end is connected to the packer by threads. After the directional opening valve is lowered to  the design depth, the pressure enters the directional opening valve cavity through the annulus, pushing  the piston rod downward, cutting the shear nails, and the piston connecting cap destroys the graphite  ring, realizing the opening of the ground control constant pressure opening valve, and directional once  opened, the opening valve cannot be closed, Only used when the Thermal injection gas vent valve cannot  be opened normally.

FEATURES

◎ Pressurized the oil casing annulus to achieve opening; 

◎ Reliable metal-to-metal seal and long life; 

◎ Standard API connection thread.

Note: Other specification products are available.