Carbon dioxide resistant oil casing
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CB80-3Cr, L80-9Cr, L80-13Cr, CB90-3Cr, CB95-3Cr, CB95-13Cr, CB110-3Cr, CB110-5Cr, CB110-13Cr, CB110S-13Cr Joint performance
Joint form |
Resistance to internal pressure and anti-crushing |
Tensile efficiency |
Anti-compression efficiency |
Applicable well condition |
S1 |
Equivalent tube |
100% tube |
60% tube |
Less harsh well conditions, shallow and middle oil and gas wells, etc. |
S2 |
100% tube |
60% tube |
Harsh well conditions, medium and deep oil and gas wells, etc. |
|
S3 |
100% tube |
60% tube |
The most demanding well conditions, deep wells, ultra-deep wells, horizontal wells, etc. |
|
S3C |
100% tube |
100% tube |
||
SJ |
100% tube |
60% tube |
Low pressure gas seal wells, ordinary horizontal wells, large displacement wells, etc. |
|
-NUFJ |
45% ~ 66% tube |
45% ~ 66% tube |
Repair wells, tail nozzles, etc. |
|
EU-HT / BC-HT |
Equivalent to API EU/BC performance |
Ordinary oil well |
"S" means "SUPER" super.
Executive Standard (Partial)
API Spec 5CT Sleeve and Tubing Specification
NACE-TM0171 Autoclave Corrosion Testing of Metals in High-Temperature Water
API Spec 5B Specification for Processing, Measurement and Inspection of Casing, Tubing and Line Pipe Threads
ISO 13679/GB/T 21267 oil and gas industry casing and tubing thread connection test procedures
...
Physical and chemical properties
Steel grade |
name |
Yield strength MPa |
Tensile strength MPa |
Elongation |
Impact toughness |
Maximum hardness |
Scope of application |
|
min |
max |
min |
HRC |
|||||
80 |
CB80-3Cr |
552 |
758 |
689 |
Calculated according to the API 5CT formula |
N80 requirements according to API 5CT |
twenty three |
Suitable for low corrosion environments containing CO 2 |
L80-9Cr 、L80-13Cr |
552 |
655 |
655 |
L80 requirements according to API 5CT |
For corrosive environments containing CO 2 |
|||
CO P CO 2≥0.02MPa) |
||||||||
90 |
CB90-3Cr |
621 |
724 |
689 |
C90 requirements according to API 5CT |
25.4 |
Suitable for low corrosion environments containing CO 2 |
|
95 |
CB95-3Cr |
655 |
758 |
724 |
T95 requirements according to API 5CT |
25.4 |
Suitable for low corrosion environments containing CO 2 |
|
CB95-13Cr |
For corrosive environments containing CO 2 |
|||||||
CO2 P CO2≥0.02MPa) |
||||||||
110 |
CB110-3Cr |
758 |
965 |
862 |
P110 requirements according to API 5CT |
32 |
Suitable for low corrosion environments containing CO 2 |
|
CB110-5Cr |
Suitable for low corrosion environments containing CO 2 |
|||||||
CB110-13Cr |
For corrosive environments containing CO 2 |
|||||||
CO2 P CO2≥0.02MPa) |
||||||||
CB110S-13Cr |
For CO 2 and a small amount of H2S corrosive environment |
|||||||
CO2 P CO2≥0.02MPa) |
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