CS-RUB系列地面控制井下安全阀应用了各种新技术。这些新技术现场应用效果良好，大幅度减少了常见的安全阀故障。 

CS-RUB地面控制井下安全阀的特点包括：防钢丝绳损坏的阀瓣结构、非弹性密封技术和关闭位置采用金属对金属密封的方式封闭井筒流体。 25%的安全阀故障是因为修井过程中钢丝绳损坏。

CS-RUB系列地面控制井下安全阀 融入了阀瓣防钢丝绳损坏的设计，这种设计非常成功，几乎能够避免这种故障。即使在钢丝绳操作过程出现意外关闭，也能确保所有密封面不会接触到钢丝绳。 

CS-RUB系列地面控制井下安全阀可以根据客户的特殊用途需要进行定制，例如注化学药剂、防钢丝绳损坏密封筒和各种控制系统型号。

CS-RUBY (RUB)  SERIES SUBSURFACE SAFETY VALVE

INTRODUCTION

The ‘RUB’ Tubing Retrievable Safety Valves is a self-equalizing, flapper-type, surface controlled  subsurface tubing mounted safety valve. The ‘RUB’ series valves are controlled from the surface via  a small diameter hydraulic Control Line connecting the safety valve to the surface Emergency Shut Down System. Since the valve is of the normally closed type, when the applied Control Line pressure is removed, the valve returns to the closed position, thus shutting in the well.  The “RUB” Tubing Retrievable Safety Valves offer permanent lock-open as a standard feature. Lock open is accomplished via Lock-Open and Communication Tools. Should circumstances request that  the valve be locked open for any reason, the valve can be locked open and either pulled from the well  or a Wireline Retrievable Insert Safety Valve may be run and landed in the Landing Nipple Profile of  the “RUB” Series Safety Valve. The Wireline Safety Valve utilizes the existing control line for operation.  A Communication Tool is used to open the control chamber to the tubing for this purpose.

FEATURES

◎ S100% Metal-to-Metal sealing and containment of wellbore fluids when the valve is in the closed position;  

◎ Two Stop Seal and Piston Non-elastomeric Seals, maximize the ‘RUB’ series reliability to meet  each application; 

◎ Lock-Open and communication. The Baker ‘RUB’ is capable of having the Flapper locked open  and communication with the hydraulic control chamber established with accessory tools that can be easily adapted to perform either functions. Communication does not request any shifting  sleeves in the Safety Valve.