Petroleum casing is a key tubing used in oil and gas wells to stabilize the borehole, isolate pipelines in different formations, prevent their collapse, prevent contamination, and ensure efficient oil recovery.
Petroleum casing is a key tubing used in oil and gas wells to stabilize the borehole, isolate pipelines in different formations, prevent their collapse, prevent contamination, and ensure efficient oil recovery.
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Grade | Type | Total under load Elongation % | Yield strength megapascal | Tensile strength megapascal | Hardness a, C Maximum | Specified OD mm | Allowable hardness Variation | ||
Min | Max | Min | HRC | HBW | HRC | ||||
H40 | – | 0.5 | 276 | 552 | 414 | – | – | – | – |
J55 | – | 0.5 | 379 | 552 | 517 | – | – | – | – |
K55 | – | 0.5 | 379 | 552 | 655 | – | – | – | – |
N80 | 1 | 0.5 | 552 | 758 | 689 | – | – | – | – |
N80 | Q | 0.5 | 552 | 758 | 689 | – | – | – | – |
R95 | – | 0.5 | 655 | 758 | 724 | – | – | – | – |
L80 | 1 | 0.5 | 552 | 655 | 655 | 23.0 | 241 | – | – |
L80 | 3Cr | 0.5 | 552 | 655 | 655 | 23.0 | 241 | – | – |
L80 | 9Cr | 0.5 | 552 | 655 | 655 | 23.0 | 241 | – | – |
L80 | 13Cr | 0.5 | 552 | 655 | 655 | 23.0 | 241 | – | – |
C90 |
– |
0.5 |
621 |
724 |
689 |
25.4 |
255 | ≤12.70 | 3.0 |
12.71 to 19.04 | 4.0 | ||||||||
19.05 to 25.39 | 5.0 | ||||||||
≥25.40 | 6.0 | ||||||||
T95 |
– |
0.5 |
655 |
758 |
724 |
25.4 |
255 | ≤12.70 | 3.0 |
12.71 to 19.04 | 4.0 | ||||||||
19.05 to 25.39 | 5.0 | ||||||||
≥25.40 | 6.0 | ||||||||
C110 |
– |
0.7 |
758 |
828 |
793 |
29 |
279 | ≤12.70 | 3.0 |
12.71 to 19.04 | 4.0 | ||||||||
19.05o to 25.39 | 5.0 | ||||||||
≥25.40 | 6.0 | ||||||||
P110 | – | 0.6 | 758 | 965 | 862 | – | – | – | – |
Q125 | – | 0.65 | 862 | 1034 | 931 | b | – | ≤12.70 | 3.0 |
12.71 to 19.04 | 4.0 | ||||||||
≥19.05 | 5.0 |
Grade | Type | C | Mn | Mo | Cr | Ni | Cu | P | S | Si | ||||
Min | Max | Min | Max | Min | Max | Min | Max | Max | Max | Max | Max | Max | ||
H40 | – | – | – | – | – | – | – | – | – | – | – | 0.030 | 0.030 | – |
J55 | – | – | – | – | – | – | – | – | – | – | – | 0.030 | 0.030 | – |
K55 | – | – | – | – | – | – | – | – | – | – | – | 0.030 | 0.030 | – |
N80 | 1 | – | – | – | – | – | – | – | – | – | 0.030 | 0.030 | – | |
N80 | Q | – | – | – | – | – | – | – | – | – | – | 0.030 | 0.030 | – |
R95 | – | – | 0.45 | – | 1.90 | – | – | – | – | – | – | 0.030 | 0.030 | 0.45 |
L80 | 1 | – | 0.43 | – | 1.90 | – | – | – | – | 0.25 | 0.35 | 0.030 | 0.030 | 0.45 |
L80 | – | – | 0.15 | 0.30 | 0.60 | 0.90 | 1.10 | 8.00 | 10.0 | 0.50 | 0.25 | 0.020 | 0.010 | 1.00 |
L80 | 13Cr | 0.15 | 0.22 | 0.25 | 1.00 | – | – | 12.0 | 14.0 | 0.50 | 0.25 | 0.020 | 0.010 | 1.00 |
C90 | 1 | – | 0.35 | – | 1.20 | 0.25 | 0.85 | – | 1.50 | 0.99 | – | 0.020 | 0.010 | – |
T95 | 1 | – | 0.35 | – | 1.20 | 025 | 0.85 | 0.40 | 1.50 | 0.99 | – | 0.020 | 0.010 | – |
C110 | – | – | 0.35 | – | 1.20 | 0.25 | 1.00 | 0.40 | 1.50 | 0.99 | – | 0.020 | 0.005 | – |
P110 | – | – | – | – | – | – | – | – | – | – | – | 0.030 | 0.030 | – |
Q125 | 1 | – | 0.35 | – | 1.35 | – | 0.85 | – | 1.50 | 0.99 | – | 0.020 | 0.010 | – |
Grade | Type | Straps for products longer than 1.8 meters Quantity and color | Coupling color | |
The whole coupling | Brand | |||
H40 | No belt or black belt, to be selected by the manufacturer | not have | Same as for the pipeline | |
J55 tubing | A sea of green | Bright green | not have | |
J55 housing | A sea of green | Bright green | One white | |
K55 | Two emerald green | Bright green | not have | |
N80 | 1 | One red | red | not have |
N80 | Q | One is red, the other emerald green | red | green |
R95 | One brown | brown | not have | |
L80 | 1 | One red, one brown | red | One brown |
L80 | 3Cr | One red and one white | red | One white |
L80 | 9Cr | One red, one brown, two yellow | not have | Two yellows |
L80 | 13Cr | One red, one brown and one yellow | not have | One yellow |
C90 | A purple one | purple | not have | |
T95 | One silver | silvery | not have | |
C110 | One white, two brown | white | Two brown | |
P110 | One white | white | not have | |
Q125 | One orange | orange | not have |
Scope 1 | Scope 2 | Scope 3 | |
Tubes (PE/T and C/SF) | 4.88 to 7.62 1.83 | 7.62 to 10.36 one point five two | 10.36 to 14.63 1.83 |
Oil pipes and casing used as oil pipes (PE/T and C/SF) | 6.10 to 7.32b 0.61 | 8.53 to 9.75 point six one | 11.58 to 12.80d 0.61 |
Overall joint tubing (including IJ/PE and IJ/SF) | 6.10 to 7.92 0.61 | 8.53 to 10.36 0.61 | 11.58 to 13.72 0.61 |
short section | Length: 0.61,0.91,1.22,1.83,2.44,3.05 and 3.669 Tolerance: ±0.076 |
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