Vacuum insulated tubing systems (VIT) consists of two concentric, tubing strings. The air between the tubulars is removed, creating a vacuum layer that is difficult for heat to move across. Therefore, vacuum insulated tubing greatly reduces the amount of heat that a well loses to its surroundings above the bitumen-bearing zone.
By reducing heat loss, less natural gas is burned to heat water to make steam. In turn, this reduces greenhouse gas emissions that would’ve been produced by burning more natural gas.
Features & Benefits
Proprietary vacuum seal technology
Options for conventional versus integral joints
Unique coupler design to mitigate heat loss
Thermal conductivity almost 100 times less than regular/bare pipe
Inner tube pre-stressed for consistent thermal expansion
Inspections include X-ray, thermal conductivity & TC testing
4th generation VIT since 1985
In this photo of a sampler, the two concentric tubing strings are visible. In between them is the getter which prevents H2 penetration. Without the getter, the presence of H2 would result in the loss of the vacuum.
The photo above showcases the careful steps taken when reaching the threads of the tubing. If these ends weren’t reinforced, the tubing would have a far greater possibility of losing the vacuum.