English
API 5CT L80 casing coupling is a type of coupling used to connect sections of L80-grade casing in oil and gas wells. L80 is a mid-range steel grade defined by the API 5CT (American Petroleum Institute) specification, designed for more demanding environments compared to lower grades like J55 or K55.
They are available in different types, such as Type 1, 3Cr, 9Cr, and 13Cr, each offering varying levels of corrosion resistance. These couplings ensure reliable connections, maintaining wellbore integrity and reducing the risk of leaks
L80 couplings are cost-effective, balancing performance and durability, and are ideal for wells requiring higher strength than J55 or K55 but not as high as C90 or T95. They are widely used in drilling operations where reliability and resistance to stress and corrosion are essential.
| Product: | API 5CT Casing Coupling, Casing Coupling, L80 Casing Coupling |
| Application: | Used for connect 2 joints of tubing or casing |
| Casing Couping: 4-1/2'' - 13-3/8'' | |
| Pipe Standard: | API 5CT and 5B PSL1/PSL2 J55, K55, N80-1, N80-Q, |
| API 5CT and 5B L80-1, C90, C95, T95, P110, Q125 | |
| Surface: | Whole Phosphating or inside phosphating and outside coating |
| Thread: | NUE, EUE, STC, LTC, BTC, XC, HYDRILL CS |
| Special Service | Sweet Service, Sour Service, Anti-H2S, NACE MR0175/ISO15156 |
| Packing: | By carton, wooden case, wooden pallet or requirement of customer |
| 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 |
| TYPE | Casing Size OD (inches) | Coupling Size OD (inches) | Length (inches) | Weight per Coupling (lbs) | Palletized Carton Quantity | Palletized Carton Weight |
| API 5CT Casing Coupling | 4 1/2″ | 5 | 7 | 9.07 | 294 | 2697 |
| 5″ | 5.563 | 7.75 | 12.56 | 210 | 2573 | |
| 5 1/2″ | 6.05 | 8 | 14.03 | 180 | 2555 | |
| 6 5/8″ | 7.39 | 8.75 | 24.82 | 100 | 2315 | |
| 7″ | 7.656 | 9 | 23.67 | 100 | 2351 | |
| 7 5/8″ | 8.5 | 9.25 | 34.23 | 80 | 2807 | |
| 8 5/8″ | 9.625 | 10 | 47.48 | 48 | 2337 | |
| 9 5/8″ | 10.625 | 10.5 | 55.77 | 40 | 2302 | |
| 10 3/4″ | 11.75 | 10.5 | 62.38 | 45 | 36 | |
| 11 3/4″ | 12.75 | 10.5 | 67.59 | 30 | 24 | |
| 13 3/8″ | 14.375 | 10.5 | 76.63 | 25 | 20 |
With a minimum yield strength of 80,000 psi, L80 couplings provide excellent mechanical performance, making them suitable for medium to high-pressure wells.
The quenching and tempering process improves toughness, ensuring resistance to impact and stress in demanding environments.
L80 Type 9, a chromium-based variant, offers improved corrosion resistance, making it ideal for mildly corrosive environments.
L80 couplings are compatible with a wide range of casing sizes and weights, adapting to various well configurations.
L80 balances performance and cost, offering a reliable solution without the expense of premium-grade materials like C90 or T95.
Manufactured to API 5CT standards, ensuring consistent quality, reliability, and interchangeability.
Suitable for both onshore and offshore wells, L80 couplings are ideal for environments requiring higher strength and durability than lower-grade materials like J55 or K55.
