API 5CT L80 yog qib qib ntawm cov yeeb nkab steel (ntxoo thiab tubing) txhais los ntawm American petroleum lub koom haum (API) tshwj xeeb 5ct. Nws yog ib qho ntawm cov qhab nia siv ntau tshaj plaws hauv cov roj thiab roj kev lag luam vim nws qhov sib xyaw ua ke ntawm lub zog, hardness, thiab corrosion tsis kam.
Cov yam ntxwv tseem ceeb:
Qib:Nruab nrab - lub zog, nrog tsawg kawg yog cov txiaj ntsig muaj zog ntawm 80,000 PSI (80 KSI).
Kev Kho Cua Sov:Nws ib txwm muab rau hauv cov quenched thiab tempered mob kom ua tiav nws cov khoom siv neeg kho tshuab thiab homogeneity.
Kev Pab:Nws yog cov qib feem ntau teev rauQaub Kev PabIb puag ncig (ib puag ncig uas muaj hydrogen sullocide {}} h₂s) vim tias nws qhov siab tshaj plaws yog nruj me ntsis tswj hwm sulfide kev ntxhov siab tawg (SSC).
Hom:L80 muaj nyob rau hauv ntau hom kev sib tw metallurgical, nrogL80 hom 1(qauv cr - mo hlau) thiabL 80 13 cr(martensitic stainless hlau rau co₂ corrosion tsis kam) ua qhov feem ntau.
Cov Khoom Tsis Cov Ntaub Ntawv & Cov Ntaub Ntawv Txheej Txheem
1. Cov Cuab Yeej Siv Khoom Siv Hluav Taws Xob
Cov ntaub ntawv hauv qab no sau cov khoom tseem ceeb rau API 5CT L80 raws li cov qauv.
| Ntiag tug | Tus nqi | Sau ntawv / ASTM AISI sib npaug |
|---|---|---|
| Teem nqi | L80 | - |
| Yam tsawg kawg nkaus xwb Zog | 80,000 psi (552 mpa) | - |
| Qhov Tshaj Tawm Los Muaj Zog | 95,000 psi (655 mpa) | Qhov no ntau yog qhov tseem ceeb rau SSC tsis kam. |
| Yam tsawg kawg tensile lub zog | 95,000 psi (655 mpa) | - |
| Hardness (siab kawg) | 23 HRC | Nov yog cov cuab yeej tseem ceeb rau H₂S kev pabcuam. Sib npaug rau ~ 241 HB. |
| Cov Xee Tawm Tsam | Tsawg dua los yog sib npaug rau 0.95 | (Tensile lub zog / tawm lub zog) |
2. Tshuaj lom neeg cov lus sib xyaw (rau L80 hom 1)
Cov tshuaj lom neeg muaj pes tsawg leeg yog qhov tseem ceeb rau kev ua tiav cov khoom siv mechanical thiab weldability. Cov hauv qab no yog qhov sib xws rau L80 hom 1.
| Lub ntsiab | Muaj pes tsawg leeg (%) | Sau ntawv |
|---|---|---|
| Carbon (c) | 0.20 - 0.35% | Muab zog. |
| Manganese (mn) | 0.75 - 1.50% | Ua kom muaj zog zog thiab ua tsis tau. |
| Chromium (cr) | 0.40 - 1.20% | Txhim kho corrosion tsis kam thiab cov tawv tawv. |
| Molybdenum (mo) | 0.15 - 0.35% | Txhim kho lub zog ntawm kev kub siab thiab SSC tsis kam. |
| Sulphur (s) | Tsawg dua los yog sib npaug rau 0.030% | Impurity, khaws cia kom tsis txhob txhim kho kev nruj. |
| Phosphorus (p) | Tsawg dua los yog sib npaug rau 0.030% | Impurity, khaws cia kom tsis txhob txhim kho kev nruj. |
| Lwm tus | Tshuav Hlau (Fe) | - |
Lus cim rau l 80 13 cr:Cov tshuaj lom neeg muaj tshuaj lom yog tus thawj coj los ntawm ~ 13% chromium, muab kev tiv thaiv zoo heev rau kev corrosion. Nws muaj pes tsawg leeg tau txhais los ntawm ib lub rooj cais hauv API 5ct.
3. Sab Nraum Tshwj Xeeb (Them Nyiaj Piv Txwv)
API 5CT npog ntau qhov ntau thiab tsawg thiab qhov hnyav. Cov lus hauv qab no qhia cov qauv piv txwv rau cov lus L80 Case.
| Sab nraud ntawm lub taub (od) | Nyhav (LB / FT) | Nominal Phab Ntsa Thickness (hauv) | Drift inch (hauv) |
|---|---|---|---|
| 4-1 / 2 "(114.3 hli) | 9.50 | 0.271 | 3.965 |
| 5-1 / 2 "(139.7 hli) | 17.00 | 0.304 | 4.857 |
| 7 "(177.8 hli) | 23.00 | 0.317 | 6.151 |
| 9-5 / 8 "(244.5 hli) | 40.00 | 0.395 | 8.681 |
| 13-3 / 8 "(339.7 hli) | 61.00 | 0.450 | 12.347 |
Xov thiab couplings:L80 Kav yog muaj nrog ntau hom api xov (LTC, BTC) lossis nrog hwm cov ntawv sib txuas rau cov ntawv tseem ceeb.
Kev sib piv nrog lwm cov qib kawm
| Teem nqi | Min. Yield zog (PSI) | Raug Thov | H₂S kev pabcuam haum |
|---|---|---|---|
| J55 | 55,000 | Qhov dej ntiav, qis {{{{}} tus nqi daim ntawv thov | Tsis pom zoo |
| N80 | 80,000 | Txheem rau feem ntau cov seem (chav kawm 1) | Tsis pom zoo (ntaus 1) |
| L80 | 80,000 | Qaub kev pab cuam, lub hom phiaj dav dav | Zoo tshaj(Hom 1 & 13CR) |
| P110 | 110,000 | Qhov dej tob, siab -} cov a | Tsis pom zoo |
| C90 | 90,000 | Sour kev pabcuam, muaj zog dua li L80 | Zoo (hom 1) |
| T95 | 95,000 | Sour kev pab cuam, muaj zog siab | Zoo (hom 1) |
Cov Kev Siv Cov Ntawv Siv
Qaub kev pab cuam Casing / Tubing:Thawj daim ntawv thov rau L80 hom 1 hauv qhov dej nrog H₂S muaj.
Co₂ corrosion resistant tubing:L 80 13} cre} cr yog qhov dav dav siv tubing ntau lawm nrog cov pa roj carbon dioxide.
Nruab nrab casing:Siv nyob rau hauv cov seem ib seem uas siab thiab corrosion txaus ntshai yog ib nrab.
Casing nyob rau hauv qab zib thiab qaub wells:Ib qho kev xaiv txhim khu kev qha thiab ntau yam rau ntau qhov chaw poob qis.
Cov Lus Tseem Ceeb Rau Cov Lus Qhia Tshwj Xeeb
Thaum xaj lossis tshwj xeeb API 5CT L80, nws yog qhov tseem ceeb los txhais:
Khoom:Casing lossis tubing.
Hom: e.g., L80 hom 1lossisL 80 13 cr.
Qhov loj me:Od thiab hnyav.
Xov Hom:API qauv lossis ib qho kev sib txuas tshwj xeeb.
Kev Xa Khoom:Xws li, dawb kawg, xov & xov.
L 80 13 Cab yuav tsum muaj kev sib tw sib txawv thiab cov txheej txheem sib tw piv rau L80 hom 1 vim nws cov khoom stainless.
Cov qib no muaj kev sib tw zoo rau cov engineers uas xav tau kev ua tau zoo hauv kev tsis txaus ntseeg, tshwj xeeb yog qhov kev txhawj xeeb uas muaj kev txhawj xeeb.
