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API 5CT J55 tubing coupling is a connector for J55-grade tubing used in oil and gas wells. J55 is a low to medium-strength steel grade defined by API 5CT, offering a minimum yield strength of 55,000 psi (379 MPa). It is cost-effective and suitable for low to medium-pressure wells.
J55 tubing couplings are manufactured to API 5CT standards, ensuring quality, reliability, and interchangeability. They are widely used in standard drilling environments where high strength is not required. However, J55 has limited corrosion resistance and is not recommended for harsh or corrosive conditions. It is a practical choice for shallow or less demanding wells.
| Product: | API 5CT Tubing coupling, Tubing coupling, J55 Tubing coupling |
| Application: | Used for connect 2 joints of tubing or casing |
| tubing Couping: 1.9'' ~ 4-1/2'' | |
| 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 |
| type | Casing Size OD (inches) | Coupling Size OD (inches) | Length (inches) | Weight per Coupling (lbs) | Palletized Carton Quantity | Palletized Carton Weight |
| API Tubing Couplings | 1.9 | 2.2 | 3.75 | 1.85 | – | – |
| 2.3/8 | 2.875 | 4.5 | 2.82 | 1,512 | 4264 | |
| 2.7/8 | 3.5 | 5.5 | 5.15 | 800 | 4120 | |
| 3.1/2 | 4.25 | 5.625 | 8.17 | 502 | 4101 | |
| 4 | 4.75 | 5.75 | 9.57 | 392 | – | |
| 4.1/2 | 5.2 | 6.5 | 10.76 | 252 | 2712 |
J55 is a lower-grade steel, making it more economical for low to medium-pressure wells and less demanding environments.
With a minimum yield strength of 55,000 psi, J55 is suitable for shallow or standard drilling conditions.
J55's lower hardness makes it easier to machine, thread, and install, reducing labor costs and time.
Manufactured to API 5CT standards, ensuring consistent quality, reliability, and interchangeability.
J55 is a commonly used grade, making it easy to source and replace.
Compatible with various tubing sizes and weights, suitable for standard well configurations.
