API 5CT N80 casing pipe chemical composition:
Grade | C | Si | Mn | P | S | Cr | Ni | Cu | Mo | V |
N80 | 0.34-0.38 | 0.20-0.35 | 1.45-1.70 | ≤0.020 | ≤0.015 | ≤0.15 | / | / | / | 0.11-0.16 |
API 5CT N80 casing pipe mechanical properties:
Grade | Type | Total elongationunder load % | Yield strength MPa | Tensile strength min. MPa |
min. | max . |
|
N80 | 1 | 0.5 | 552 | 758 | 689 |
N80 | Q | 0.5 | 552 | 758 | 689 |
API 5CT N80 casing pipe specification:
Thread type: SC (Short round thread), LC (Long round thread), BC (Buttress thread)
Length: R1 (4.88-7.62m), R2 (7.62-10.36m), R3 (10.36-14.63m)
Outer Diameter | Wall Thickness | Weight | Threaded | Length |
in | mm | kg/m | lb/ft |
4 1/2″ | 114.3 | 14.14-22.47 | 9.50-11.50 | LTC/STC/BTC | R1/R2/R3 |
5″ | 127 | 17.11-35.86 | 11.50-24.10 | LTC/STC/BTC | R1/R2/R3 |
5 1/2″ | 139.7 | 20.83-34.23 | 14.00-23.00 | LTC/STC/BTC | R1/R2/R3 |
6 5/8″ | 168.28 | 29.76-35.72 | 20.00-24.00 | LTC/STC/BTC | R1/R2/R3 |
7″ | 177.8 | 25.30-56.55 | 17.00-38.00 | LTC/STC/BTC | R1/R2/R3 |
7 5/8″ | 193.68 | 35.72-63.69 | 24.00-42.80 | LTC/STC/BTC | R1/R2/R3 |
8 5/8″ | 219.08 | 35.72-72.92 | 24.00-49.00 | LTC/STC/BTC | R1/R2/R3 |
9 5/8″ | 244.48 | 48.07-86.91 | 32.30-58.40 | LTC/STC/BTC | R1/R2/R3 |
10 3/4″ | 273.05 | 48.73-97.77 | 32.75-65.70 | LTC/STC/BTC | R1/R2/R3 |
11 3/4″ | 298.45 | 62.50-89.29 | 42.00-60.00 | LTC/STC/BTC | R1/R2/R3 |
13 3/8″ | 339.72 | 71.43-107.15 | 48.00-72.00 | LTC/STC/BTC | R1/R2/R3 |