Tom ntej: L80 Tubing
Txheem:API 5 CT
Qib: L80
Hom:Seamless Steel Tubing
Kev Siv Tseem Ceeb:Covdefault thiab feem ntau qibrau cov tubing ntau lawm hauv qhov dej uas muaj hydrogen sulfide (H₂S) lossis carbon dioxide (CO₂).
Feature tseem ceeb: Yuav tsum tau SSC (Sulfide Stress Cracking) tsis kam.Qhov kev xaiv meej rau "kev pabcuam qaub."
Kev piav qhia ntxaws
1. "L80" – Qib Qib
"L": Feem ntau suav hais tias yog sawv rau"Low Hardness"los yog"Limited Yield zog", xa mus rau nws cov khoom tswj tau rau kev pabcuam qaub.
"80": Qhia covyam tsawg kawg nkaus yield zogntawm 80,000 psi (552 MPa). Qhov no zoo ib yam rau N80.
2. Cov yam ntxwv tseem ceeb & cov cuab yeej
Qib Siab: Nruab nrab-High (80 ksi).Nws muab tib yam kev ua haujlwm zoo li N80, ua rau nws haum rau ntau qhov tob thiab qhov siab.
Sour Service Muaj peev xwm: Qhov no yog lub ntsiab lus ntawm L80.
Nws yog tsim tshwj xeeb thiab raug yuam kom tawm tsamSulfide Stress Cracking (SSC)nyob rau hauv ib puag ncig uas muaj H₂S.
Nws cov tshuaj muaj pes tsawg leeg thiab siab tshaj plaws hardness yog nruj me ntsis tswj.
Nws yog thawj qib thiab tseem ceeb tshaj plaws hauv API 5CT uas yogTsim nyog rau kev pabcuam qaub rau ISO 15156-2 / NACE MR0175.
Qhov txawv ntawm N80:Thaum N80 thiab L80 sib koom tib yamyam tsawg kawg nkausyield zog (80 ksi), lawv yogtsis interchangeable.
L80 muaj lub zog siab tshaj plaws ntawm 95,000 psithiab aMaximum hardness txwv(feem ntau yog 23.0 HRC).
N80 muaj cov txiaj ntsig siab tshaj plaws (110 ksi) thiabtsis muaj hardness tswj. Qhov kev tswj tsis tau qhov nyuaj no ua rau N80 raug rau SSC.
Peb hom:L80 tau teev nyob rau hauv peb hom, uas txhais nws cov alloy muaj pes tsawg leeg:
L80 Hom 1:Chromium-molybdenum steel (piv txwv li, 4130/4140 hloov). Feem ntau hom thiab ntau yam.
L80 Hom 9:Tsawg- carbon martensitic stainless hlau (xws li 9Cr-1Mo). Rau siab dua kub thiab ntau corrosive qab zib pab.
L80 Hom 13:Martensitic stainless hlau (13% Chromium). Rau nruab nrab CO₂ corrosion kuj (qab zib corrosion) tab sistsis yog rau kev pabcuam H₂S tas li.
Rau kev pabcuam qaub (H₂S), L80 Hom 1 yog cov qauv xaiv.
3. Sib piv nrog Cov Qib Tseem Ceeb
| Qib | Min Yield | Max Yield | Max Hardness | Sour Service | Qhov tseem ceeb sib txawv vs. L80 |
|---|---|---|---|---|---|
| N80 | 80 ksg | 110 ksg | Tsis tswj | TSIS MUAJ | Tib lub zog min, tab sistsis zoo rau H₂S. "Sweet Service ntxaib." |
| L80 | 80 ksg | 9 5 ksg | Tswj (~ 23 HRC) | YOG | Lub caij ua haujlwm qaub.Lub hauv paus qib rau corrosive qhov dej. |
| C95 | 9 5 ksg | 110 ksg | Tswj (~ 25.4 HRC) | YOG | Siv thaum L80's 80 ksi lub zog tsis txaus rau qhov tob / siab hauv qhov dej qaub. |
| P110 | 110 ksg | 140 ksg | Tsis tswj | TSIS MUAJ (tshwj tsis yog P110S) | Lub zog siab dua rau kev pabcuam qab zib. Tsis yog qhov hloov pauv rau L80. |
4. Cov ntawv thov ib txwm
L80 tubing tau teev tseg thaum twg corrosion yog qhov tsim qauv:
Sour Gas & Roj Wells:Txhua qhov dej nrog ntsuas H₂S ib nrab siab.Qhov no yog nws thawj daim ntawv thov.
Wells nrog Siab CO₂ Ib Feem Siab:Thaum Hom 13 zoo dua rau cov ntshiab CO₂ corrosion, L80 Hom 1 feem ntau siv nrog inhibition.
Ib qho dej ntawm cov kua dej tsis meej:Hauv kev tshawb nrhiav lossis thaj chaw uas H₂S yog qhov ua tau, L80 raug xaiv raws li kev saib xyuas, muaj kev nyab xeeb.
Deep, Sour Wells (nrog C95 / Q125):L80 yog siv nyob rau sab sauv, tsawg corrosive seem ntawm txoj hlua tubing, thaum siab dua - qib qaub qaub yog siv hauv qab no.
Cov hlua ua haujlwm hauv Sour Wells:Rau kev ua tiav lossis kev cuam tshuam hauv cov qhov dej qaub uas twb muaj lawm.
5. Cov lus qhia txog cov ntsiab lus
| Khoom | Specification rau L80 Hom 1 |
|---|---|
| Txuj | API 5 CT |
| Qib | L80 Hom 1 (yuav tsum qhia hom) |
| Hom | Seamless Tubing |
| Yam tsawg kawg nkaus Yield Strength | 80,000 psi (552 MPa) |
| Maximum Yield zog | 95,000 psi (655 MPa)- Ib qho tseem ceeb tswj. |
| Maximum Hardness | 23.0 TSI (241 HBW)- Kev tswj hwm SSC tseem ceeb. |
| Kev kho cua sov | Yuav tsum Quench & Tempered (Q&T)- Qhov tseem ceeb rau kev ua tiav kev tswj hwm, cov khoom sib xws. |
| Xov | Ob leeg API (EUE) thiabHwm Kev Sib Txuasmuaj ntau heev. Rau qhov tseem ceeb qaub qhov dej, premium seals yog nyiam. |
| Sour Service | Tsim nyog rau ISO 15156-2 / NACE MR0175.Lub ntsiab yog vim li cas rau nws nyob. |
Kev txiav txim siab tseem ceeb rau Engineers & Buyers
Qhov N80 vs. L80 Kev txiav txim siab tsis yog-Negotiable:Qhov no yog qhov tseem ceeb tshaj plaws kev xaiv cov khoom siv rau kev ncaj ncees hauv kev pabcuam corrosive.Yog tias H₂S nyob, L80 (los yog qib qaub siab dua) yog qhov yuav tsum tau ua.
Kev yuav khoom Precision:PO yuav tsum hais meej meej:
Qib:L80 Hom 1 (los yog Hom 9/13 yog muaj).
Sour Service Requirement:Daim ntawv pov thawj NACE MR0175 / ISO 15156.
Coupling Khoom:Couplings yuav tsum yog tib yam qaub- cov khoom tsim nyog (feem ntau cim li L80).
Kev tshuaj xyuas:Feem ntau Qeb II lossis III rau tag nrho traceability.
Tus nqi Justification:L80 yog kim dua N80 vim kev tswj kev tsim khoom nruj dua, alloying (Cr, Mo), thiab Q&T kev kho cua sov. Tus nqi no yog kev pov hwm tiv thaiv kev puas tsuaj SSC tsis ua haujlwm.
Tsis yog Kev Kho -Txhua:L80 resists SSC tab sis tseem raug rau qhov hnyav dav dav -tsis xeb, chloride stress cracking, thiab lwm yam. Kev tswj corrosion (inhibition, txheej) tseem yuav tsum tau.
Kev sib txuas ncaj ncees:Hauv kev pabcuam qaub, kev sib txuas yog qhov tseem ceeb raws li cov yeeb nkab lub cev. SSC tuaj yeem pib hauv xov hauv paus. Kev sib txuas hwm nrog kev ua kom qaug zog thiab SSC tsis kam feem ntau tau teev tseg.
"Gold Standard" Analogy
Xav txog tubulars raws li cov qauv kev nyab xeeb:
N80yog zoo li tus qauv kev lag luam nyuaj lub kaus mom - zoo meej rau txhua hnub, paub txog kev phom sij.
L80zoo li alub kaus mom tawv nrog cov kua qaub- tiv taus txheej, hluav taws xob rwb thaiv tsev, thiab daim npog ntsej muag tag nrho- tsim los rau kev paub txog tshuaj lom neeg thiab hluav taws xob phom sij. Koj yuav tsis nkag mus rau cov nroj tsuag tshuaj tsis muaj nws.
Cov ntsiab lus
API 5CT L80 tubing yog qhov tseem ceeb, 80 ksi yield zog, quenched & tempered qaub - qib kev pab cuam. Nws yog thawj thiab tseem ceeb tshaj plaws ntawm kev tiv thaiv Sulfide Stress Cracking (SSC) hauv hydrogen sulfide ib puag ncig.
Nws tswj cov chemistry, nruj hardness txwv (max 23 HRC), thiab yuav tsum tau Q&T kev kho cua sov txawv nws ntawm nws tsis yog - qaub ntxaib, N80.L80 Hom 1 yog lub neej ntawd thiab kev xaiv zoo tshaj plaws rau feem coob ntawm cov roj corrosive thiab roj qhov dej thoob ntiaj teb.
Hauv cov ntsiab lus: Lub xub ntiag ntawm H₂S ua rau kev xaiv L80. Nws yog qib pib rau kev ncaj ncees hauv kev pabcuam corrosive, muab qhov tseem ceeb ntawm kev sib npaug ntawm lub zog, muaj, thiab pov thawj SSC tsis kam.Rau cov qhov dej uas xav tau lub zog ntau dua, cov kws ua haujlwm nce mus txog C95 lossis cov qib muaj tswv, tab sis lawv pib nrog L80 ua tus qauv ntsuas.
