Introduction

Full Opening Safety Valves (FOSV), also known as TIW valves, are critical well control tools used in drilling operations to prevent fluid backflow and ensure safety during pipe connections and disconnections.

Unionlever OFS supplies high-quality FOSV valves designed for demanding oilfield applications, meeting API standards and supporting both onshore and offshore drilling projects.

What is a Full Opening Safety Valve (FOSV)?

A Full Opening Safety Valve is installed in the drill string to provide full-bore flow while allowing immediate shut-off capability. It is widely used to control unexpected well pressure and prevent blowouts.

• Full bore design for unrestricted flow

• Quick shut-off function for emergency control

• High-pressure resistance

Key Features of Our FOSV Valves

• API compliant manufacturing standards

• High-strength alloy steel construction

• Precision CNC machining for reliability

• Hydrostatic pressure testing before delivery

• Replaceable repair kits available

Available Connections and Specifications

We supply FOSV valves with a wide range of thread connections, including:

• XT Series (XT39, XT50, XT54)

• VAM TOP, VAM FJL

• Tenaris Hydril Wedge Series

• API standard connections

Custom specifications are available based on project requirements.

Applications

• Oil and gas drilling operations

• Well intervention and workover

• High-pressure drilling environments

• Onshore and offshore projects

Why Choose Unionlever OFS

• Proven supply to international oilfield clients

• Strict quality control and inspection process

• Engineering support for product selection

• Flexible supply and fast delivery

We support global clients across the Middle East, Southeast Asia, and South America, ensuring reliable performance in critical operations.

Conclusion

Full Opening Safety Valves are essential for maintaining safety and control in drilling operations. Choosing a reliable supplier ensures operational efficiency and minimizes risks.

Unionlever OFS is your trusted partner for high-quality well control equipment.

Request a Quote

For technical details, pricing, and project solutions, please contact: sales@unionlever.com