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Full Opening Safety valve (FOSv) is a ball-type safety valve used to stop flow through the drill string when the drill string is being withdrawn from the well. FOSv is a dual body full-opening safety valve, that does not interfere with the running of tools such as core barrels or survey instruments. It is designed to be stabbed into the top joint of drill pipe or tubing string at the rig floor and closed quickly in case a well kicks.
Full Opening Safety Valves (FOSV) are essential pressure control tools used in drilling operations to ensure well control and prevent blowouts. These valves are designed to provide a full bore opening, allowing unrestricted fluid flow while maintaining safety and operational integrity.
Our company offers a complete line of Full Opening Safety Valves engineered to provide reliable shutoff capabilities in drilling applications. These valves can be operated manually or remotely, ensuring quick and efficient response to pressure surges and emergencies.
Manufactured from high-quality materials, including high-strength alloy steels, these valves meet the strictest industry standards, including API specifications. They are suitable for a wide range of drilling conditions and are an integral part of well control systems.
Technical Data:
| Parameter | Specification |
|---|---|
| Size Range | Various sizes available |
| Material | High-strength alloy steel / Stainless steel |
| Pressure Rating | Up to 15,000 PSI |
| Operation Type | Manual / Remote Control |
| Seal Type | Metal-to-metal or elastomeric seals |
| Temperature Rating | Suitable for extreme temperature conditions |
Full Opening Safety valve (FOSv) is a ball-type safety valve used to stop flow through the drill string when the drill string is being withdrawn from the well. FOSv is a dual body full-opening safety valve, that does not interfere with the running of tools such as core barrels or survey instruments. It is designed to be stabbed into the top joint of drill pipe or tubing string at the rig floor and closed quickly in case a well kicks.
The ball-type design permits the valve to be compact, easy to handle, and have great strength. The standard test pressure is 10,000 psi, but higher-pressure ratings are available.
| Type | Exradius OD Inch (mm） | Inradius ID Inch (mm) | Connecting thread API | working pressure MPa |
|---|---|---|---|---|
| FOSV79 | 3-1/9 (79) | 4/5 (20) | 2-7/8HT PAC | 35-70 |
| FOSV89 | 3-1/2 (89) | 1-3/16 (30) | NC26 | |
| FOSV111 | 4-3/8 (111) | 1-37/64 (40) | NC31 | |
| FOSV121 | 4-3/4 (121) | 1-31/32 (50) | NC38 | |
| FOSV127 | 5 (127) | |||
| FOSV133 | 5-1/4 (133) | 2-11/25 (62) | NC40 | |
| FOSV159 | 6-1/4 (159) | 2-4/5 (71) | NC46 | |
| FOSV165 | 6-1/2 (165) | 2-13/16 (71.4) | NC50 | |
| FOSV168 | 6-5/8 (168) | |||
| FOSV190 | 7-1/2 (190) | 3 (76.2) | 5-1/2FH |
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