Ang oil casing ay isang malaking diameter na tubo na nagsisilbing tructural retainer, maaari nitong protektahan ang parehong ilalim ng ibabaw at well bore mula sa
gumuho at upang payagan ang likido sa pagbabarena na umikot at makuha.
Mga pagtutukoy
Pamantayan: API 5CT.
walang tahi na bakal na casing at tubing pipe: 114.3-406.4mm
welded steel casing at tubing pipe: 88.9-660.4mm
Panlabas na Mga Dimensyon: 6.0mm-219.0mm
Kapal ng Pader: 1.0mm-30 mm
Haba: max 12m
Materyal: J55, K55, N80-1, N80-Q, L80-1, P110, atbp.
Koneksyon sa thread: STC, LTC, BTC, XC at Premium na koneksyon
Pamantayan |
API 5CT/ ISO11960 |
|
Grade |
Pangkat.1 |
H40/PSL.1, J55/PSL.1, J55/PSL.2, J55/PSL.3, K55/PSL.1, K55/PSL.2, K55 /PSL.3, |
Pangkat.2 |
M65/PSL.1, M65/PSL.3, L80/PSL.2, L80(1)/PSL.1, L80(1)/PSL.3, L80(9Cr) /PSL.1, |
|
Pangkat.3 |
P110/PSL.1, P110/PSL.2, P110/PSL.3, |
|
Pangkat.4 |
Q125/PSL.1, Q125/PSL.2, Q125/PSL.3, |
|
Minimum na Dami ng Order |
1 tonelada |
|
Labas na Mga Hanay ng Diameter |
Tubing |
1.315 pulgada hanggang 4 1/2 pulgada o 48.26mm hanggang 114.3mm |
Casing |
4 1/2 pulgada hanggang 13 3/8 pulgada o 114.3mm hanggang 339.72mm |
|
Kapal ng pader |
Ayon sa API 5CT Standard |
|
Ang haba |
Tubing |
R1 (6.10m hanggang 7.32m), R2 (8.53m hanggang 9.75m), R3 (11.58m hanggang 12.80m) |
Casing |
R1 (4.88m hanggang 7.62m), R2 (7.62m hanggang 10.36m), R3 (10.36m hanggang 14.63m) |
|
Uri |
Walang pinagtahian |
|
Uri ng End-Finish |
Tubing |
P, I, N, U |
Casing |
P, S, B, L |
Mga sukat
Mga Sukat ng Pipe Casing, Oilfield Casing Size at Casing Drift Sizes | |
Panlabas na Diameter (Mga Sukat ng Casing Pipe) | 4 1/2"-20", (114.3-508mm) |
Mga Karaniwang Laki ng Casing | 4 1/2"-20", (114.3-508mm) |
Uri ng Thread | Buttress thread casing, Long round thread casing, Maikling round thread casing |
Function | Maaari nitong protektahan ang tubing pipe. |
Komposisyong kemikal
Grade | C≤ | Si≤ | Mn≤ | P≤ | S≤ | Cr≤ | Ni≤ | Cu≤ | Mo≤ | V≤ | Als≤ |
API 5CT J55 | 0.34-0.39 |
0.20-0.35 |
1.25-1.50 |
0.020 |
0.015 |
0.15 |
0.20 |
0.20 |
/ |
/ |
0.020 |
API 5CT K55 | 0.34-0.39 |
0.20-0.35 |
1.25-1.50 |
0.020 |
0.015 |
0.15 |
0.20 |
0.20 |
/ |
/ |
0.020 |
API 5CT N80 | 0.34-0.38 |
0.20-0.35 |
1.45-1.70 |
0.020 |
0.015 |
0.15 |
/ |
/ |
/ |
0.11-0.16 |
0.020 |
API 5CT L80 | 0.15-0.22 |
1.00 |
0.25-1.00 |
0.020 |
0.010 |
12.0-14.0 |
0.20 |
0.20 |
/ |
/ |
0.020 |
API 5CT J P110 | 0.26-035 |
0.17-0.37 |
0.40-0.70 |
0.020 |
0.010 |
0.80-1.10 |
0.20 |
0.20 |
0.15-0.25 |
0.08 |
0.020 |
Mga Katangiang Mekanikal
Marka ng Bakal |
Lakas ng Yield (Mpa) |
Lakas ng Tensile (Mpa) |
API 5CT J55 |
379-552 |
≥517 |
API 5CT K55 |
≥655 |
≥517 |
API 5CT N80 |
552-758 |
≥689 |
API 5CT L80 |
552-655 |
≥655 |
API 5CT P110 |
758-965 |
≥862 |