When valves don't hold, when isolation is uncertain, or when shutting down an entire system is not practical — cryogenic freeze isolation provides a temporary, reliable pressure barrier. Using liquid nitrogen, we create ice plugs that can hold significant differential pressure while downstream work is completed safely.
How It Works
Liquid nitrogen is applied to the external surface of a pipe or tubular at a controlled rate, freezing the contents inside and creating a solid, pressure-containing plug. Once work is complete, the freeze is allowed to thaw naturally, returning the system to its original state with no permanent modification.
Applications
- Valve replacement where upstream isolation is unavailable or unreliable
- Pipeline modification without system depressurization or shutdown
- Temporary isolation for pressure testing
- Wellhead component replacement when barriers cannot be verified
- Emergency isolation in the event of valve failure
Why Freeze Instead of Mechanical Isolation?
Cryogenic freeze isolation is often the preferred method when mechanical isolation tools cannot be deployed, when the geometry is not suitable for plugs, or when the cost and time of a full system shutdown outweigh the freeze operation.
