English
API 5CT J55 casing coupling is a threaded joint used to connect J55 grade casing sections. It complies with API 5CT standards and is suitable for oil and gas wells. Its function is to ensure the sealing and strength between casing sections through threaded connection, maintain the integrity of the wellbore structure, support the well wall and withstand downhole pressure.
The J55 grade indicates that its minimum yield strength is 55,000 psi, which is suitable for medium-depth well conditions. The coupling is designed to resist mechanical stress, corrosion and high-pressure environments to ensure the smooth progress of drilling and completion operations.
| Product: | API 5CT Casing Coupling, Casing Coupling, J55 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 J55 Chemical Composition | |||||||||
| Grade | C | Si | Mn | P | S | Cr | Ni | Cu | Mo |
| API 5CT J55 | 0.34-0.39 | 0.20-0.35 | 1.25-1.50 | 0.02 | 0.015 | 0.15 | 0.2 | 0.2 | / |
| API 5CT J55 Mechanical Property | |||
| Steel Grade | Yield Strength (Mpa) | Tensile Strength (Mpa) | Total elongation under load % |
| API 5CT J55 | 379-552 | ≥517 | 0.5 |
| Tubing Size, OD | 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 |
J55 is a lower-grade steel, making it more economical compared to higher-grade materials, suitable for less demanding environments.
J55 provides sufficient tensile and yield strength for low to medium-pressure wells, ensuring reliable performance in standard drilling conditions.
While not as corrosion-resistant as higher grades, J55 couplings can handle mild corrosive environments, especially when treated or coated.
J55's lower hardness makes it easier to machine, thread, and install, reducing labor costs and time during operations.
These couplings are compatible with a wide range of casing sizes and weights, making them adaptable to various well configurations.
Manufactured to API 5CT specifications, J55 couplings ensure consistent quality, reliability, and interchangeability.
J55 is a commonly used grade, ensuring easy sourcing and replacement.
