Your Best Partner
Get Best, Quick Solution

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)

Outer tube OD x Inner Tube OD

(in x in)

Outer Pipe

ODxWT (mm)

Inner Pipe

ODxWT (mm)

Coupling OD


Cementing Center


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
Grade/Conductivity A B C D E
Heat conductivity coefficient

K=Watt/Meter x Celsius

0.06 ~ 0.08 0.04 ~ 0.06 0.02 ~ 0.04 0.006 ~ 0.02 0.002 ~ 0.006

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.

Vacuum Insulated Tubing Drawing

Send Us Enquiry

Learn More When Inquiring

Why choose Lake Petro
Why choose Lake Petro?
Methods of Payment & Quality Control
Methods of Payment & Quality Control
Order procedure
What’s the order procedure?

Buyer’s Guide

Please send us your inquiry with detail item description or with Model number. If there is no packing demand we take it as our regular exported standard packing. We will offer you an order form for filling. We will recommend you the most suitable model according to information you offered.

We can give you really high quality products with competitive price. We have a better understanding in Chinese market, with us your money will be safe.

Get Quick Response

Lake Petro is located in Dongying City, which is famous for Shengli Oilfield and the largest manufacturing hub of petroleum equipment in China. Following the principle of “quality first, science and technology innovated, people oriented”, every Lake Petro person is sparing no effort to provide the customers with best products and services. Our products are based on advanced production line and testing equipment, our products are designed and manufactured according to certification of API, ISO, GOST, etc.