Tom ntej: N80 Tubing
Txheem:API 5 CT
Qib: N80
Hom:Seamless Steel Tubing
Kev Siv Tseem Ceeb:Ib qho dav dav - lub hom phiaj, nruab nrab - lub zog ua haujlwm rau ntau qhov chaw zoo.
Feature tseem ceeb: Muaj peev xwm ua tau zoo thiab kev ua haujlwm sib luag, tab sis tsis yog rau qaub (H₂S) kev pabcuam.
Kev piav qhia ntxaws
1. "N80" – Qib Qib
"N": Keeb kwm sawv rau"Normalized", uas yog tus qauv kev kho cua sov rau qib no kom ua tiav nws cov khoom.
"80": Qhia covyam tsawg kawg nkaus yield zogntawm 80,000 psi (552 MPa). Qhov no tso nws ruaj khov rau hauv nruab nrab - pawg zog.
2. Cov yam ntxwv tseem ceeb & cov cuab yeej
Qib Siab: Nruab nrab -High.Lub 80 ksi yield zog ua rau N80 haum rau ntau yam ntawm qhov tob tob thiab siab. Nws muaj zog dua J/K55 (55 ksi) thiab muab lub platform muaj zog ua ntej nce mus rau qib siab - zog xws li P110.
Sour Service Muaj peev xwm: TSIS TAU.Qhov no yogQhov sib txawv tseem ceeb tshaj plaws ntawm N80 thiab L80.
Standard N80 muajtsis tas yuav tsum hardness tswjhauv API specification.
Nws yog npaj nruj rau"qab zib" kev pabcuam(ib puag ncig yam tsis muaj Hydrogen Sulfide, H₂S).
Nws hardness tuaj yeem thiab feem ntau ua dhau qhov txwv rau Sulfide Stress Cracking (SSC) tsis kam.
Kev kho cua sov:Thaum xub thawj, niaj hnub N80 tuaj yeem tsim los ntawm ntau yam txheej txheem (normalized, lossis quench & tempered rau Hom Q) tsuav nws ua tau raws li cov khoom siv kho tshuab.
Ob hom:API 5CT txhais ob hom N80, uas feem ntau yog qhov tsis meej pem:
N80-1:Tus qauv qib nrog cov txheej txheem tshuaj lom neeg.
N80-Q:Qhov "Q" sawv cev rau Quenched & Tempered. Nws muaj cov tshuaj tswj nruj dua (tshwj xeeb tshaj yog qis carbon thiab manganese) los txhim kho weldability thiab toughness, tab sisnws tseem tsis tau ntsuas rau qhov kev pabcuam qaubtshwj tsis yog tias tau hloov kho thiab kuaj pom tseeb.
3. Sib piv nrog Cov Qib Tseem Ceeb
| Qib | Min Yield zog | Sour Service (H₂S) | Qhov tseem ceeb sib txawv vs. N80 |
|---|---|---|---|
| J55 / K55 | 5 5 ksg | Tsis muaj | N80 yog ~ 45% muaj zog, txav mus rau qhov tob / siab dua - cov ntawv thov siab. |
| N80 | 80 ksg | Feem ntau No | Cov neeg ua haujlwm ntxim hlub.Siab zog, tsis tshua muaj nqi, dav muaj. |
| L80 | 80 ksg | Yog (Tim 1) | Muaj lub zog zoo ib yam tab sis yog qaub - kev pabcuam tsim nyog.Qhov kev xaiv tseem ceeb rau cov qhov dej corrosive. |
| C95 | 9 5 ksg | Yog lawm | Cov kauj ruam tom ntej mus rau qhov dej qaub uas yuav tsum tau muaj zog ntau dua li L80 tuaj yeem muab tau. |
Kev txiav txim siab N80 vs. L80 yog qhov tseem ceeb:Rau txhua qhov dej uas H₂S ua tau lossis lees paub,L80 yuav tsum tau teev tseg.Kev siv N80 hauv ib puag ncig qaub ua rau muaj kev pheej hmoo loj ntawm kev puas tsuaj SSC tsis ua haujlwm.
4. Cov ntawv thov ib txwm
N80 tubing yog qhov kev xaiv ua ntej rau ntau yam ntawm tus qauv, tsis yog - corrosive qhov dej:
Medium Depth/Pressure Production Wells:Daim ntawv thov "khob cij thiab butter" rau ntau txhiab thaj av-raws li qhov dej.
Dej Txhaum & pov tseg qhov dej:Qhov twg xav tau lub zog siab rau qhov tob tab sis cov kua dej tsis yog -corrosive (xws li dej kho).
Gas Storage Wells:Rau cyclic txhaj / tsim cov roj qab zib ntuj.
Txoj hlua ua haujlwm & Ua tiav Tubing:Feem ntau siv rau kev cuam tshuam, tawg, thiab ua tiav hauv cov dej qab zib vim nws lub zog thiab muaj.
Cov cheeb tsam nrog Proven Sweet Formations:Nyob rau hauv geological basins uas reservoir kua yog keeb kwm tsis muaj H₂S.
5. Cov lus qhia txog cov ntsiab lus
| Khoom | Specification rau Standard N80 |
|---|---|
| Txuj | API 5 CT |
| Qib | N80 (Hom 1 lossis Hom Q) |
| Hom | Seamless Tubing |
| Yam tsawg kawg nkaus Yield Strength | 80,000 psi (552 MPa) |
| Maximum Yield zog | 110,000 psi (758 MPa) |
| Hardness | Tsis muaj qhov txwv siab tshaj APIrau Standard N80. Qhov no yog vim li cas nws tsis yog SSC-resistant. |
| Kev kho cua sov | Normalized, lossis Q&T rau N80-Q. |
| Xov | Feem ntau nrog API (EUE) thiab Premium Connections. |
| Sour Service | Tsis tsim nyog rau hauv paus specification. |
Kev txiav txim siab tseem ceeb rau Engineers & Buyers
Lub Sour Service Trap:Ib txoj cai tseem ceeb tshaj plaws:Tsis txhob siv N80 hauv kev pabcuam qaub.Ib txwm ua ib qho kev ntsuam xyuas cov dej muaj pes tsawg leeg. Yog tias muaj kev tsis ntseeg, hloov mus rau L80.
Hom Specification:Hauv daim ntawv xaj khoom, qhia meejN80-1los yogN80-Q. N80-Q (quenched & tempered) feem ntau muab cov khoom zoo dua los ntawm-thickness thiab weldability rau cov khoom txuas.
Nqi vs. Risk:N80 feem ntau yogqis dua L80vim yog cov tshuaj lom neeg los ntawm kev tswj cov tshuaj looser. Qhov kev txuag nqi no tsuas yog siv tau yog tias lub qhov dej yog qhov tseeb qab zib.
Kev xaiv kev sib txuas:Rau siab - siab lossis kev pabcuam cyclic, cov kev sib txuas hwm zoo feem ntau ua ke nrog N80 yeeb nkab kom ntseeg tau tias muaj kev sib khi, vim cov yeeb nkab lub cev nws tus kheej muaj zog tab sis API threaded kev twb kev txuas tuaj yeem yog qhov tsis muaj zog.
Corrosion:Txawm hais tias tsis yog rau H₂S, N80 tseem yuav xav tau kev tiv thaiv corrosion rau CO₂ (qab zib corrosion) lossis oxygen, nyob ntawm cov ntsiab lus dej.
Analogy "Tus Neeg Ua Haujlwm".
Xav txog cov qib tubular raws li lub nkoj ntawm cov tsheb:
H40/J55yog cov tsheb me me – rau qhov yooj yim, lub teeb - cov dej num ua haujlwm.
N80yog covstandard pickup tsheb- txhim khu kev qha, muaj zog, thiab siv rau 80% ntawm cov haujlwm niaj hnub nyob rau hauv tsis yog -ib puag ncig ua phem.
L80yog covpickup tsheb nrog corrosion{0}} pov thawj thiab tawm - pob kev- rau tib txoj hauj lwm tab sis nyob rau hauv hnyav, corrosive tej yam kev mob.
P110/C95yog hnyav- cov tsheb thauj khoom - rau cov khoom hnyav dua.
Q125yog lub tsheb thauj khoom tshwj xeeb - rau cov haujlwm hnyav tshaj plaws.
Cov ntsiab lus
API 5CT N80 tubing yog 80 ksi yam tsawg kawg nkaus tawm lub zog, dav dav - lub hom phiaj, tus nqi- qib zoo tsim los rau nruab nrab- qhov tob, nruab nrab- siab ntau lawm thiab kev pabcuam hauv qhov dej nrog NON-SOUR ("qab zib") ib puag ncig.Nws lub zog zoo heev -rau- tus nqi piv thiab muaj ntau heev ua rau nws yog qhov kev xaiv zoo tshaj plaws rau ntau qhov kev ua tiav zoo thoob ntiaj teb.
Txoj cai tseem ceeb: N80 thiab kev pabcuam qaub (H₂S) tsis sib tov.Lub xub ntiag ntawm H₂S, txawm li cas los xij me me, yuam kev sivL80los yog siab dua qaub- qib kev pabcuam. N80 lub luag hauj lwm yog raws li qhov txhim khu kev qha, muaj zog qaum ntawm lub ntiaj teb oilfield rau tsis yog - daim ntawv thov corrosive.
