English
API 5CT L80 casing pipe is a high-grade steel tube used in oil and gas well drilling, meeting API (American Petroleum Institute) standards. It is specifically designed for environments requiring enhanced corrosion resistance and mechanical strength. L80 casing is heat-treated to achieve optimal toughness and durability, making it suitable for sour service (H₂S-containing environments) and moderate to high-pressure conditions.
Its primary functions include stabilizing the wellbore, preventing collapse, and isolating geological formations to ensure safe and efficient drilling operations. The L80 grade is available in different types, such as Type 1, 3Cr, 9Cr, and 13Cr, with varying chromium content to meet specific corrosion resistance needs.
| product name | API-5CT Casing Pipe, L80 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 L80 Chemical Composition | ||||||||
| Grade | C | Si | Mn | P | S | Cr | Ni | Cu |
| API 5CT L80 | 0.15-0.22 | 1 | 0.25-1.00 | ≤0.020 | ≤0.010 | 12.0-14.0 | 0.2 | 0.2 |
| API 5CT L80 Mechanical Property | ||||
| Grades | Yield Strength (Mpa) | Tensile Strength (Mpa) | Elongation under load, % | Hardness, HRC |
| L80 type 1 | 552-655 | 655 | 0.5 | 23 |
| L80 type 9Cr | 552-655 | 655 | 0.5 | 23 |
| L80 type 13Cr | 552-655 | 655 | 0.5 | 23 |
| 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 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 5″ | 127 | 17.11-35.86 | 11.50-24.10 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 5 1/2″ | 139.7 | 20.83-34.23 | 14.00-23.00 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 6 5/8″ | 168.28 | 29.76-35.72 | 20.00-24.00 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 7″ | 177.8 | 25.30-56.55 | 17.00-38.00 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 7 5/8″ | 193.68 | 35.72-63.69 | 24.00-42.80 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 8 5/8″ | 219.08 | 35.72-72.92 | 24.00-49.00 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 9 5/8″ | 244.48 | 48.07-86.91 | 32.30-58.40 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 10 3/4″ | 273.05 | 48.73-97.77 | 32.75-65.70 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 11 3/4″ | 298.45 | 62.50-89.29 | 42.00-60.00 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 13 3/8″ | 339.72 | 71.43-107.15 | 48.00-72.00 | L80 | LTC/STC/BTC | R1/R2/R3 |
It has a high yield strength of 552 MPa and tensile strength of 655 MPa, making it suitable for medium to deep wells with higher pressure conditions. This strength allows it to withstand significant external and internal pressures, reducing the risk of collapse and failure.
L80 casing pipe is available in various types, including Type 1, 3Cr, 9Cr, and 13Cr, which provide enhanced corrosion resistance. This is particularly beneficial in harsh environments, such as those containing hydrogen sulfide (H2S) or other corrosive substances, extending the pipe's service life.
Its versatility makes it suitable for a wide range of drilling applications, from onshore to offshore operations.
The combination of high strength, corrosion resistance, and adaptability makes API 5CT L80 casing pipe a reliable choice for demanding oil and gas well construction.
