VIT/Vacuum Insulated Tubing

• 2020-09-09 19:22:11
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The Premium insulated Tubing mainly consists of main pipe string, thermal-protective coating, sealing ring and liner pipe, etc. Using clip wall enclosed welding structure, The inner tube was pre-stressed during welding, Multiple insulation structures are added between the inner and outer tube interlayers, and between the insulating layer placed a hydrogen absorbing agent, At the same time, the special process was carried out and It can effectively reduce the energy loss in heat conduction, convection and radiation, It can not only prevent the occurrence of "hydrogen explosion" accident of insulated Tubing, but also extend the heat insulation life of Vacuum Insulated Tubing.

Technical specification

Specification	Parameter
	139×101	139×88	114×76	114×62	88×50	73×40
Insulation grade	D   E		C   D   E		B C D E
Length(m)	9.0-10.0
Weight (kg/m)	42.04	40.7	32	28	21	15
Connection	51/2BCSG	51/2BCSG	41/2 BCSG		31/2 USS	27/8 USS 27/8 TBG
OD(mm)	139.7	139.7	114.3		88.9	73.0
ID(mm)	101.6	88	76.0	62.0	50.6	40.9
OD of coupling (mm)	154	154	132		108	88.9
Work Depth(m)	1600m，The max depth is 4600m

Insulation grade value

Insulation grade	Ｂ	Ｃ	Ｄ	Ｅ
Apparent thermal conductivityλ  (W/m.℃)	0.06＞λ≥0.04	0.04＞λ≥0.02	0.02＞λ≥0.006	0.006＞λ≥0.002