Vacuum Insulated Tubing
Vacuum Insulated Tubing (VIT) is designed to develop oil and gas fields located in the most challenging oil and gas production conditions.
For example, Pre-stressed Vacuum Insulated Tubing (VIT) replaces oil tubing for heavy oil recovery by steam injection to improve project economics.
Vacuum insulated tubing & casing uses water-based fiber cloth material with a three grade vacuum pump equipment, automatic welding machine and MT. These guarantees a high degree of vacuum level that meets the insulation grades D and E.
These vacuum insulated tubing & casing use an effective getter to ensure the tubing insulation grade do not decrease after a long time of outdoor storage.
Grades: J55, K55, L80, N80, 80SS, P110
Length Range: R2 or R3
Threading: Inner tube and outer tube threading
Connections: Semi-premium and premium available
Normal operating temperature: 350 Celsius
Conductivity (k) of inner pipe: 0.002 ~ 0.08 W/m·℃
|API 5CT Vacuum Insulated Tubing (VIT)|
|ModelOuter tube OD x Inner Tube OD
(in x in)
|Outer PipeODxWT (mm)||Inner PipeODxWT (mm)||Coupling OD(mm)||Cementing Center (in)||Thread|
|3 1/2 x 2 3/8||88.9 x 6.45||60.3 x 4.83||108||5||3 1/2 USS|
|4 1/2 x 2 7/8||114.3 x 6.88||73.02 x 5.51||132||7||4 1/2 BC|
|4 1/2 x 3 1/2||114.3 x 6.88||88.9 x 6.45||132||7||4 1/2 BC|
|5 x 3 1/2||127.0 x 9.19||88.9 x 6.45||141.3||9 5/8||5BC|
|5 1/2 x 4 1/2||139.7 x 7.72||114.3 x 6.35||154||5 1/2 BC|
|7 x 5 1/2||177.8 x 9.19||139.7 x 7.72||154||7 BC|
|Insulation Grades Available|
|Heat conductivity coefficientK=Watt/Meter x Celsius||0.06 ~ 0.08||0.04 ~ 0.06||0.02 ~ 0.04||0.006 ~ 0.02||0.002 ~ 0.006|