English
API 5CT N80 casing pipe is a high-strength steel tube used in oil and gas well drilling, complying with API (American Petroleum Institute) standards. It is designed for medium to high-pressure environments and offers superior mechanical properties compared to lower-grade casings like J55.
N80 casing provides excellent tensile and yield strength, making it suitable for deeper wells and more challenging conditions. Its primary functions include stabilizing the wellbore, preventing collapse, and isolating different geological formations to ensure safe and efficient drilling operations.
N80 casing also resists higher internal and external pressures, making it ideal for wells with elevated stress levels. Additionally, it can withstand moderate corrosive environments, enhancing durability. Its robust construction ensures reliable performance in demanding applications, such as hydraulic fracturing and high-pressure reservoirs.
| product name | API-5CT Casing Pipe, N80 Casing Pipe, API-5CT Casing, Oil Casing pipe, Oil well casing, casing pipe oil and gas |
| Outer Diamater | 48.26mm-508.00mm |
| Wall Thickness | 3.68mm-16.13mm |
| Thread Type | STC LTC BTC NUE EUE |
| Standards | API SPEC 5CT |
| Steel Grade | H40 J55 K55 N80 N80Q L80 P110 T95 Q125 |
| Surface Treatment | Hot Rolled |
| Special Pipe | API Pipe, Thick Wall Pipe, Other |
| Application | Fluid Pipe, Boiler Pipe, Drill Pipe, Hydraulic Pipe, OIL PIPE, Gas Pipe, Chemical Fertilizer Pipe |
| Certificate | API, ISO9001 |
| Length | R1(6.10-7.32m), R2(8.53-9.75m), R3(11.58-12.8m) |
| MOQ | 1 ton |
| Packing | Standard Seaworthy Packing |
| Supply Ability | 3000Tons per Month |
| API 5CT N80 Chemical Composition | |||||||||
| Grade | C | Si | Mn | P | S | Cr | Ni | Cu | Mo |
| N80 type1/Q | 0.34-0.38 | 0.20-0.35 | 1.45-1.70 | 0.02 | 0.015 | 0.15 | / | / | / |
| API 5CT N80 Mechanical Property | |||
| Grades | Yield Strength (Mpa) | Tensile Strength (Mpa) | Elongation under load, % |
| N80 type 1 | 552-758 | 689 | 0.5 |
| N80 type Q | 552-758 | 689 | 0.5 |
| Outer Diameter | Wall Thickness | Weight | Grade | Threaded | Length | |
| in | mm | kg/m | lb/ft | |||
| 4 1/2″ | 114.3 | 14.14-22.47 | 9.50-11.50 | N80 | LTC/STC/BTC | R1/R2/R3 |
| 5″ | 127 | 17.11-35.86 | 11.50-24.10 | N80 | LTC/STC/BTC | R1/R2/R3 |
| 5 1/2″ | 139.7 | 20.83-34.23 | 14.00-23.00 | N80 | LTC/STC/BTC | R1/R2/R3 |
| 6 5/8″ | 168.28 | 29.76-35.72 | 20.00-24.00 | N80 | LTC/STC/BTC | R1/R2/R3 |
| 7″ | 177.8 | 25.30-56.55 | 17.00-38.00 | N80 | LTC/STC/BTC | R1/R2/R3 |
| 7 5/8″ | 193.68 | 35.72-63.69 | 24.00-42.80 | N80 | LTC/STC/BTC | R1/R2/R3 |
| 8 5/8″ | 219.08 | 35.72-72.92 | 24.00-49.00 | N80 | LTC/STC/BTC | R1/R2/R3 |
| 9 5/8″ | 244.48 | 48.07-86.91 | 32.30-58.40 | N80 | LTC/STC/BTC | R1/R2/R3 |
| 10 3/4″ | 273.05 | 48.73-97.77 | 32.75-65.70 | N80 | LTC/STC/BTC | R1/R2/R3 |
| 11 3/4″ | 298.45 | 62.50-89.29 | 42.00-60.00 | N80 | LTC/STC/BTC | R1/R2/R3 |
| 13 3/8″ | 339.72 | 71.43-107.15 | 48.00-72.00 | N80 | LTC/STC/BTC | R1/R2/R3 |
N80 casing offers superior tensile and yield strength, making it suitable for deeper wells and high-pressure environments.
Its robust construction ensures long-term performance in demanding drilling conditions, including hydraulic fracturing and high-stress reservoirs.
N80 casing can withstand higher internal and external pressures, ensuring wellbore stability and safety.
While not as corrosion-resistant as higher grades, N80 performs well in moderately corrosive environments, especially with protective treatments.
Suitable for a wide range of applications, including oil, gas, and geothermal wells, particularly in medium to high-pressure conditions.
Manufactured to API 5CT specifications, ensuring consistent quality, reliability, and compatibility with other well components.
