API 5CT N80 roj zoo casing yeeb nkab yog dab tsi
Apr 03, 2026
N80 roj casingyog ib qho nruab nrab -rau-lub zog siab seamless steel yeeb nkab ua raws li API 5CT cov qauv, feem ntau yog siv rau kev txhawb nqa zoo thiab roj thiab roj tsheb thauj mus los thaum lub sij hawm roj thiab roj drilling. Nws lub npe qib steel "N80" qhia qhov tsawg kawg nkaus lub zog ntawm 80,000 psi (kwv yees li 552 MPa), muab faib ua ib qho nruab nrab - cov khoom siv dag zog siv dav hauv kev ua tiav thiab tsim cov theem ntawm onshore thiab ntiav- hiav txwv roj thiab roj qhov dej.
API 5CT N80 Seamless Roj Casing Yeeb Nkab Chemical Composition
| Qib Steel | Qeb | Cov pa roj carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Silicon (Si) |
| N80-1 | Li qub | Tsis Qhia | Tsis Qhia | Tsawg dua lossis sib npaug li 0.030% | Tsawg dua lossis sib npaug li 0.030% | Tsis Qhia |
| N80-Q | Quenched & Tempered | Tsis Qhia | Tsis Qhia | Tsawg dua lossis sib npaug li 0.030% | Tsawg dua lossis sib npaug li 0.030% | Tsis Qhia |
API 5CT N80 roj zoo casing Mechanical Properties
| Khoom | Unit (Metric) | Tus nqi | Chav (Imperial) | Tus nqi |
| Yield zog | MPa | 552 ~ 758 | psi | 80,000 ~ 110,000 |
| Tensile zog | MPa | Ntau dua lossis sib npaug rau 689 | psi | Ntau dua lossis sib npaug li 100,000 |
| Hardness | - | Tsis xav tau | - | Tsis xav tau |
| Elongation | % | Muab xam los ntawm cov mis | % | Muab xam los ntawm cov mis |
API 5CT N80 OCTG Casing Pipe Thaum tshav kub kub kho (Qhov txawv qhov tseem ceeb)
| Qib qeb | Txoj kev kho cua sov | Cov yam ntxwv ua haujlwm |
| N80-1 | Normalizing (N) lossis Normalizing + Tempering | Tus nqi qis dua; standard collapse kuj. |
| N80-Q | Quenched & Tempered (Q&T) | Ntau yam microstructure; zoo dua toughness thiab superior vaum kuj piv rau N80-1. |
API 5CT N80 seamless casing thiab tubing Impact Test Requirements
N80-1:API 5CT feem ntau uatsis yogtxoj cai Charpy V-notch (CVN) cuam tshuam kev kuaj tshwj tsis yog tau teev tseg hauv daim ntawv xaj khoom.
N80-Q:Kev ntsuam xyuas cuam tshuam yogyuav tsum tau(tshwj tsis yog tias pom zoo) kom ua kom muaj zog nyob rau hauv siab - kev ntxhov siab lossis qis - qhov kub thiab txias.
API 5CT N80 Oilfield Casing Kub Rolled Tube Xim Qhia
| Qib Steel | Xim Band | Txoj kev thov |
| N80-1 | Liab | Ib txoj hlua liab ntawm lub cev yeeb nkab |
| N80-Q | Liab + Ntsuab | Ib lub paj liab thiab ib lub paj ntsuab |
Common Dimensions thiab Load Capacities (Piv txwv)
N80 Tubing (piv txwv)
| Sab nraud Dia (inch) | Phab ntsa Thickness (mm) | Yield Load (kN, Theo.) | Collapse Resistance (MPa) |
| 2-7/8 "(73.02mm) | 5.51 | 650+ | 70+ |
| 3-1/2 "(88.90mm) | 6.45 | 930+ | 65+ |
N80 Casing (Piv txwv)
| Sab nraud Dia (inch) | Phab ntsa Thickness (mm) | Nominal Nyhav (lb/ft) | Sab hauv Yield (psi) | Collapse (psi) |
| 5-1/2" | 7.72 | 17.00 | 7,740 | 6,290 |
| 7" | 9.19 | 26.00 | 7,240 | 5,410 |
| 9-5/8" | 10.03 | 40.00 | 5,750 | 3,090 |
Kev tsim khoom thiab kev tshuaj xyuas
| Yam khoom | Kev xav tau |
| Kev tsim khoom | Seamless (SML) lossis Electric Resistance Welded (ERW) |
| Hydrostatic Test | Yuav tsum muaj rau txhua qhov sib koom ua ke; kev ntsuas siab yog siab dua J55. |
| NDT (Tsis yog -Kev puas tsuaj) | Yuav tsum tau kuaj Ultrasonic lossis Electromagnetic kuaj (feem ntau L4 qib tshuaj ntsuam xyuas). |
| Kev ncaj | Kev ua raws li API 5CT nruj; tag nrho deviation Tsawg dua lossis sib npaug li 0.2% ntawm tag nrho qhov ntev. |
API 5CT N80 octg hauv Tshuag
GNEE Yeeb Nkab kuaj thiab tshuaj xyuas cov cuab yeej
GNEE Pipe txheej txheem kab
FAQ
N80 khoom qib yog dab tsi?
N80 yog aqib steel txhais los ntawm American Petroleum Institute (API) specification rau Roj Lub Tebchaws Tubular Khoom (OCTG). Paub txog nws lub zog thiab kev tiv thaiv corrosion thiab tawg, N80 steel muab kev ua tau zoo tshwj xeeb hauv kev nyuaj drilling.
Qhov txawv ntawm L80 thiab N80 yog dab tsi?
N80: yield zog ntawm 379MPa ~ 552MPa; tensile Ntau dua lossis sib npaug ntawm 517MPa; Qhov tsawg kawg nkaus elongation ntawm N80 yog 19%.L80: yield zog ntawm 379MPa ~ 552MPa; tensile Ntau dua lossis sib npaug ntawm 655MPa; Qhov tsawg kawg nkaus elongation ntawm L80 yog 15%.
Qhov luaj li cas yog N80 casing?
N80 casing npog ntau qhov ntau thiab tsawg los ntawm me me mus rau qhov loj. Cov txheej txheem dav dav rau N80 casing yog:4-1/2", 5-1/2", 6-5/8", 7", 9-5/8", thiab 13-3/8 ". Cov txheej txheem sab nraud rau N80 tubing yog: 2-3/8", 2-7/8", 3-1/2", 4", thiab 4-1/2".
