Description
Tubing is a relatively small-diameter pipe that is run into a well to serve as a conduit for the passage of oil and gas to the field surface facilities for processing. Tubing must be adequately strong to resist loads and deformations associated with production and workovers. Further, tubing must be sized to support the expected rates of production of oil and gas.
Sizes and Materials
Tubing pipes are manufactured in seamless and welded execution, in the size range of 1.050 to 5 1/2 inches (consult this article to see the AP5CT tubing pipes sizes) and in the following material grades: H-40, J-55, K-55, N-80, L-80, C-90, T-95, P-110, Q-125
End Connections
The main types of connections for tubing pipes are NUE (non-upset), EUE (external upset) and premium. Corrosion resistance under sour service conditions is a very important OCTG characteristic, especially for casing and tubing.
More casing pipes and their colors
Specification
Oil Tubing
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Range 1
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Range 2
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Range 3
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6.10~7.32
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8.53~9.75
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11.58~12.80
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Label |
D Outside diameter mm |
Wall thickness mm |
C type of end-finish |
1 |
2 |
NU T&C |
EU T&C |
IJ |
H40 |
J55 |
L80 |
N80 |
C90 |
T95 |
P110 |
1.9 |
2.75 |
2.9 |
4 |
48.26 |
3.68 |
PNUI |
PNUI |
PNUI |
PNUI |
PNUI |
PNUI |
|
3.65 |
3.73 |
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Customer group photo
Production process
Qualification certificate