API 5CT L80-1 Roj Lub Tebchaws Tubular Khoom
API 5CT L80-1 Roj Lub Tebchaws Tubular Khoom (OCTG)yog lub zog nruab nrab ntawm cov roj av tshwj xeeb cov yeeb nkab uas ua raws li American Petroleum Institute (API) 5CT tus qauv. Nws yog tsuas yog siv rau kev tsim cov casing thiab tubing nyob rau hauv cov roj thiab roj qhov dej thiab yog haum rau tsawg corrosive ib puag ncig.
L80-1 yog lub hauv paus hom nyob rau hauv qib L80 steel, nrog "L80" qhia qhov tsawg kawg nkaus yield zog ntawm 80 ksi (kwv yees li 552 MPa), uas muaj cov cuab yeej zoo thiab kev lag luam. L80-1 yog ua los ntawm carbon manganese hlau, uas tsis muaj cov ntsiab lus tseem ceeb alloying thiab tsis muaj qhov tshwj xeeb corrosion kuj. Nws feem ntau tiv thaiv corrosion los ntawm cov txheej txheem sab nraud (xws li epoxy resin).
Nws yog dav siv nyob rau hauv onshore pa pa qhov dej thiab cov pa roj, ntiav cov pa reservoirs, thiab shale gas kab rov tav qhov dej uas tsis muaj corrosion. Nws yog tus nqi qis tshaj plaws thiab cov qauv kev lag luam siab tshaj plaws hauv L80 series. Raws li API 5CT tus qauv, L80-1 tuaj yeem ua rau hauv casing, tubing, thiab laum yeeb nkab, nrog rau cov kab sib txawv ntawm Φ 114.3-508mm thiab phab ntsa tuab ntawm 5.21-16.13mm. Qhov ntev yog muab faib ua peb pawg: R1, R2, thiab R3.
Tseem txhawj xeeb txog kev hloov cov roj casing ntau zaus vim qhov tsis zoo compression tsis kam? API 5CT L80-1 roj casing, ua los ntawm cov khoom siv muaj zog tsim nyog rau kev nyuaj downhole,nyem kom tau txais cov kev daws teeb meem tshwj xeeb
Chemical Composition Table
| Element | Cov ntsiab lus xav tau (%) | Sau ntawv |
|---|---|---|
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.45 | Tswj hardenability, tiv thaiv vuam tawg |
| Manganese (Mn) | 0.60–1.35 | Txhim khu lub zog thiab toughness |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.030 | nruj me ntsis txwv kom tsis txhob txias brittleness |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.025 | Txo kub tawg thiab corrosion pib |
| Silicon (Si) | 0.10–0.45 | Deoxidizer, txhim kho lub zog |
| Chromium (Cr), Nickel (Ni), Molybdenum (Mo) | Tsis muaj kev xav tau tshwj xeeb | Tsis muaj cov ntsiab lus tseem ceeb ntawm alloy, qhov txawv ntawm L80-9Cr / L80-13Cr |
Mechanical Properties Table
| Khoom | Tus nqi tsim nyog (API 5CT) | Yam Ntsuas Tus Nqi |
|---|---|---|
| Yield zog (YS) | Ntau dua lossis sib npaug li 552 MPa | 580-650 MPa |
| Tensile zog (TS) | 655-827 MPa | 700-780 MPa |
| Elongation (A) | Ntau dua lossis sib npaug li 18% | 20–25% |
| Hardness (HB) | Tsawg dua lossis sib npaug li 255 | 220–240 |
| Impact Toughness (-20 degree) | Ntau dua lossis sib npaug li 40 J | 50–60 J |
Xim Band Identification
Raws li API 5CT cov qauv, cov xim xim cim rau L80-1 yog raws li hauv qab no:
Thawj Band: Liab
Secondary Band: Tsis muaj
Marking Method: A 25mm dav liab circumferential bandyog pleev xim rau ntawm ob qho kawg ntawm cov yeeb nkab lub cev kom ceev nrooj qhia cov qib.
Production Casing Size Table
| Nominal Casing Loj (inch) | Sab nraud txoj kab uas hla (mm) | Common Phab Ntsa Thickness (mm) | Daim ntawv thov ntu |
|---|---|---|---|
| 4½ | 114.3 | 6.35, 7.37, 8.56 | Nruab nrab- thaj chaw tsim khoom tob |
| 5 | 127.0 | 7.52, 9.19 | Pa roj & roj qhov dej |
| 5½ | 139.7 | 7.72, 9.17, 11.51 | Main ntau lawm casing |
| 7 | 177.8 | 8.05, 10.36, 12.65 | Sib sib zog nqus ua tiav seem |
| 9⅝ | 244.5 | 9.53, 11.05, 13.84 | Nto / nruab nrab casing |
API 5CT L80 Hom 1 Casing Tolerance Table
| Yam khoom | Tolerance Yuav Tsum Tau |
|---|---|
| Sab nraud Diameter (OD) | ± 0.75% (rau phab ntsa thickness Ntau dua lossis sib npaug rau 5.21mm) |
| Phab ntsa Thickness (WT) | +12.5% / -10.0% |
| Ntev | R1: +100mm / -200mm; R2/R3: +100mm / -150mm |
| Ovality | Tsawg dua lossis sib npaug li 0.75% OD |
| Kev ncaj | Tsawg dua lossis sib npaug li 3 hli / m, tag nrho Tsawg dua lossis sib npaug li 12 hli |
| Xov Parameters | Yuav tsum ua raws li API 5B tus qauv, nrog rau kev ua siab ntev ntawm lub suab, taper, thiab xov qhov siab |
API 5CT L80-1 OCTG Hoobkas
API 5CT L80-1 Casing yeeb nkab kuaj thiab tshuaj xyuas
FAQ
Dab tsi yog cov tshuaj muaj pes tsawg leeg ntawm API 5CT L80 Hom 1
Cov tshuaj muaj pes tsawg leeg ntawm API 5CT L80 Hom 1 yog ua los ntawm carbon manganese hlau, tsis muaj cov ntsiab lus tseem ceeb alloying. Cov ntsiab lus carbon tsis ntau tshaj 0.45%, cov ntsiab lus manganese nyob nruab nrab ntawm 0.60% thiab 1.35%, phosphorus thiab sulfur yog tswj hauv qab 0.030% thiab 0.025% raws li, cov ntsiab lus silicon yog nyob nruab nrab ntawm 0.10% thiab 0.45%, thiab tsis muaj cov kev cai tshwj xeeb rau cov chromium, nickel, thiab lwm yam. qis- alloy steel thiab yog tsim rau cov roj corrosive tsawg thiab roj qhov chaw ib puag ncig.
L80 yog cov hlau tsis tshua muaj hlau
L80 steel qibbelongs rau nruab nrab lub zog roj zoo yeeb nkab khoom raws li API 5CT tus qauv, nrog rau qhov tsawg kawg nkaus yield zog ntawm 80 ksi (kwv yees li 552 MPa). Txawm hais tias nws cov khoom tseem ceeb yog carbon manganese steel (C-Mn), txhawm rau txhim kho cov qauv, txhim kho hardenability thiab lub zog, me me ntawm alloying ntsiab xws li chromium (Cr), molybdenum (Mo), npib tsib xee (Ni) feem ntau yog ntxiv. Ntev npaum li tag nrho cov ntsiab lus ntawm cov ntsiab lus no tau tswj hwm nyob rau theem qis (feem ntau tsawg dua 5%), nws ua tau raws li cov ntsiab lus ntawm qis- alloy steel.
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