API 5CT J55 Casing:
J55 Casing is placed downhole to provide structural integrity to the wellbore and must withstand external-collapse pressure from rock formations and internal-yield pressure from fluid and gas. It must also hold its own deadweight and withstand the torque and transaxial pressure placed on it while running downhole.
API 5CT J55 Tubing:
J55 Tubing is placed within the casing. It is used to transport oil and gas from the source rock to the wellhead.
| PRODUCT | GRADE | DIAMETER | END TYPE |
| J55 TUBING | J55, JFBNAU, L80, P110, 1% Chrome | 2.375″ – 3.5″ | Plain End EUE 8RD |
| J55 CASING | J-55, L80 HC, P110 HC | 4.5″ – 9.625″ (J55, L80 HC, P110 HC) 10.75” – 20” (J55) | Plain End, STC, LTC, BTC |
| Outer Diameter | Wall Thickness | Weight | Threaded | Length | |
| in | mm | kg/m | lb/ft | ||
| 4 1/2″ | 114.3 | 14.14-22.47 | 9.50-11.50 | LTC/STC/BTC | R1/R2/R3 |
| 5″ | 127 | 17.11-35.86 | 11.50-24.10 | LTC/STC/BTC | R1/R2/R3 |
| 5 1/2″ | 139.7 | 20.83-34.23 | 14.00-23.00 | LTC/STC/BTC | R1/R2/R3 |
| 6 5/8″ | 168.28 | 29.76-35.72 | 20.00-24.00 | LTC/STC/BTC | R1/R2/R3 |
| 7″ | 177.8 | 25.30-56.55 | 17.00-38.00 | LTC/STC/BTC | R1/R2/R3 |
| 7 5/8″ | 193.68 | 35.72-63.69 | 24.00-42.80 | LTC/STC/BTC | R1/R2/R3 |
| 8 5/8″ | 219.08 | 35.72-72.92 | 24.00-49.00 | LTC/STC/BTC | R1/R2/R3 |
| 9 5/8″ | 244.48 | 48.07-86.91 | 32.30-58.40 | LTC/STC/BTC | R1/R2/R3 |
| 10 3/4″ | 273.05 | 48.73-97.77 | 32.75-65.70 | LTC/STC/BTC | R1/R2/R3 |
| 11 3/4″ | 298.45 | 62.50-89.29 | 42.00-60.00 | LTC/STC/BTC | R1/R2/R3 |
| 13 3/8″ | 339.72 | 71.43-107.15 | 48.00-72.00 | LTC/STC/BTC | R1/R2/R3 |
Steel Color Code Of API 5CT Grade J55
| Name | J55 |
| Casing | a bright green band |
| Coupling | entire green coupling + a white band |
Mechanical Properties
| Standard | Type | Tensile Strength MPa |
Yield Strength MPa |
Hardness Max. |
| API SPEC 5CT | J55 | ≥517 | 379 ~ 552 | —- |
Chemical Composition
| J55 Grade | J55 Type | C | Mn | Mo | Cr | Ni max. | Cu max. | P max. | S max. | Si max. | ||||
| min. | max. | min. | max. | min. | max. | min. | max. | |||||||
| J55 | - | - | - | - | - | - | - | - | - | - | - | 0.03 | 0.03 | - |
Features
l The surface of thread of coupling and API 5CT J55 Casing Tubing should be smooth without any tear, burr or other defects that may have a negative impact on the strength and close connection.
l API 5CT J55 Casing Tubing is offered with a free length range from 8m to 13m on basis of the SY/T6194-96 norm. However, it is also available no less than 6m length and its quantity should be no more than 20%.
l Deformations which mentioned above are not allowed to appear on the outer surface of API 5CT J55 Casing Tubing coupling.
l Any deformation such as crease, separation, hairline, crack or scab is not acceptable on both inner and outer surfaces of the product. All these defects should be completely removed, and the removed depth must not exceed 12.5% of nominal wall thickness.
Applications: J55 casing pipe is widely used in the foundation works of many industries such as petroleum, natural gas, coal gas, water supply, thermal power generation, hydropower generation, dredging engineering etc.
Post time: Oct-14-2021