N80-Qyog qib siab -lub zog steel qib rau oilfield casing thiab tubing, tswj los ntawmAPI 5 CTspecification.
Lub npe tau muab faib ua ob ntu uas txhais nws cov khoom:
N80: Sawv cev yam tsawg kawg nkaus yield zog ntawm80,000 psi(80 hli).
Q: Sawv rauQuenched thiab Tempered, uas yog hais txog cov txheej txheem kev kho cua sov tshwj xeeb siv los tsim cov hlau.
Tau txais daim ntawv sib tw rau API 5CT N80-Q Casing & Tubing -Thov Nqe Hnub No!
Qhov "Q" yam: Kev kho cua sov
Thawj qhov sib txawv ntawm N80-Q thiab qib N80-1 yog qhov lawv tau kho cua sov li cas:
Quenching:Cov hlau yog rhuab mus rau qhov kub thiab txias sai sai (feem ntau hauv dej los yog roj). Qhov no ua rau cov hlau tawv heev tab sis nkig.
Tempering:Cov hlau yog reheated rau qhov kub thiab txias kom "tougher" cov khoom, txo brittleness thaum tuav lub zog siab.
Qhov tshwm sim:Cov txheej txheem no tsim cov qauv zoo dua qub thiab ua kom zoo dua qub piv rau N80-1 (uas feem ntau tsuas yog "Normalized").
N80-Q Roj Zoo Casing Hlau Yeeb NkabMechanical Properties
N80-Q belongs rauPawg 1ntawm API 5CT specification (General Purpose).
| Khoom | Tus nqi (Imperial) | Tus nqi (Metric) |
| Yield zog (Min) | 80,000 psi | 552 MPa ua |
| Yield zog (Max) | 110,000 psi | 758mpa ua |
| Tensile zog (Min) | 100,000 psi | 689mpa ua |
| Hardness | Tsis txwv API | Tsis txwv API |
N80-Q roj lub teb chaws tubular khoomChemical Composition Table (% Max)
API 5CT cov cai rau N80-Q yog qhov hloov tau yooj yim, feem ntau tsom rau Phosphorus thiab Sulfur txwv los tswj cov khoom purity.
| Element | API 5CT Limits (%) | Lus hais |
| Cov pa roj carbon (C) | Tsis Qhia | Feem ntau tswj ntawm 0.25% - 0.45% |
| Manganese (Mn) | Tsis Qhia | Feem ntau tswj ntawm 1.00% - 1.60% |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.030 | Tswj impurity |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.030 | Tswj impurity |
| Silicon (Si) | Tsawg dua lossis sib npaug li 0.45 | Siv rau deoxidation thiab ntxiv dag zog |
| Cr / Mo / Ni | Kev xaiv ntxiv | Cov neeg tsim khoom feem ntau ntxiv Cr thiab Mo los txhim kho hardenability |
N80-Q vs N80-1
Thaum ob qho tib si muaj 80,000 psi yam tsawg kawg nkaus lub zog, lawv tau siv sib txawv:
| Feature | N80-1 | N80-Q |
| Kev kho cua sov | Li qub | Quenched & Tempered |
| Toughness | Txuj | Superior (Higher impact resistance) |
| Collapse Resistance | Txuj | Siab dua (Zoo dua rau qhov dej tob) |
| API Xim Code | Ib Band | Ib Leeg Liab + Ib Leeg Ntsuab |
| Nqi | Kev lag luam ntau dua | Me ntsis kim dua |
N80-Q Oilfield CasingKev ceeb toom tseem ceeb: Tsis yog rau Kev Pab Cuam Tshuam
Nws yog ib qho yuam kev uas xav tias N80-Q tuaj yeem siv rau hauv qhov chaw corrosive vim nws yog "zoo dua" dua N80-1.
N80-Q tsis yog rau Sour Service (H2S ).
Nws tsis muaj qhov txwv hardness (max 23 HRC) yuav tsum tau tiv thaiv Sulfide Stress Cracking.
Yog tias koj lub qhov dej muaj H2S, koj yuav tsum sivL80hloov N80-Q.
N80-Q OCTG CasingDaim ntawv thov
N80-Q feem ntau yog siv raws li:
Intermediate Casing:Hauv nruab nrab - mus rau - qhov dej tob uas xav tau kev sib tsoo ntau dua.
Tubing ntau lawm:Hauv "Sweet Wells" (tsis muaj H2S) qhov twg txoj hlua yuav tsum txhawb nqa nws tus kheej qhov hnyav tshaj li ob peb txhiab taw.
High-Pressure Wells:Qhov twg qib J55 lossis K55 tsis muaj zog heev los tiv thaiv kev kub ntxhov sab hauv.
N80-Q Roj TubingManufacturing & Testing Requirements
Tshooj lus no qhia txog qhov sib txawv ntawm N80-Q thiab N80-1.
| Yam khoom | Kev xav tau |
| Kev kho cua sov | Tag nrho -length Quenched & Tempered (Q&T) yog qhov yuav tsum tau ua. |
| Impact Testing (CVN) | Ua tau yog tias tau teev tseg hauv daim ntawv cog lus yuav khoom; Q-qib feem ntau muaj qhov qis dua -kub toughness. |
| Tsis yog -Kev Ntsuas Kev Puas Tsuaj (NDT) | Yuav tsum muaj tag nrho -length Ultrasonic (UT) lossis Electromagnetic (EMI) tshuaj xyuas. |
| Hydrostatic Test | Txhua cov yeeb nkab yuav tsum raug ntsuas raws li API cov qauv, feem ntau yog tuav rau ntau dua lossis sib npaug li 5 vib nas this. |
| Ncaj & Dimensions | Yuav tsum nruj me ntsis ua raws li API 5CT kam rau ua. |
API 5CT N80Q OCTG Hoobkas
FAQ
Dab tsi yog qhov yield zog ntawm N80 steel?
Lub zog tawm los ntawm N80 steel yog:
Yam tsawg kawg nkaus:80,000 psi (552 MPa)
Qhov siab tshaj plaws:110,000 psi (758 MPa)
N80 yeeb nkab yog dab tsi?
Ibn80 cevyog ib lub siab - lub zog steel yeeb nkab siv rau casing thiab tubing hauv cov roj thiab roj qhov dej, tswj hwm los ntawmAPI 5 CTspecification.
Lub zog:Yam tsawg kawg yield zog ntawm80,000 psi(80 hli).
Kev Pabcuam:Tsim los rau"Sweet Service"(Qhov dej tsis muaj corrosive Hydrogen Sulfide, H2S ).
Hom:Muaj raws liN80-1(Normalized) thiabN80-Q(Quenched & Tempered).
Xim Code:Txheeb xyuas los ntawmib pob liab(N80-Q muaj ib pawg ntsuab ntxiv).
Kev siv:Qhov zoo tshaj plaws rau nruab nrab - mus rau - qhov tob tob qhov twg yuav tsum muaj kev tiv thaiv siab rau sab hauv thiab kev sib tsoo.
