Hauv kev lag luam roj thiab roj, lubqibntawm casing thiab tubing hais txog cov tshuaj muaj pes tsawg leeg thiab txhua yam khoom ntawm cov hlau. Tshwj xeeb, nws qhia rau kojyam tsawg kawg nkaus yield zogntawm lub cev.
Cov qib steel yog standardized los ntawmAPI Spec 5CT. Lub npe ntawm qib muaj ib tsab ntawv ua raws li tus lej (xws li J55, P110). Tus lej sawv cev rau qhov tsawg kawg nkaus yield zog nyob rau hauvtxhiab phaus ib square inch (psi).
100% API 5CT Ua raws -Thov Cov Ntawv Qhia Txog Cov Khoom Siv (MTC) rau Peb Cov Qib Tag Nrho Cov Qib Hlau.
API Oilfield Casing Pipes Hlau Qib
API 5CT faib cov qhab nia rau plaub pawg raws li lawv qhov kev ua tau zoo:
Pab Pawg 1: Cov Ntsiab Lus Tseem Ceeb
Cov no yog cov feem ntau thiab tus nqi - cov qhab nia zoo siv hauv qhov ntiav mus rau nruab nrab - qhov tob qhov qhov siab siab lossis corrosive gases tsis yog ib qho kev txhawj xeeb loj.
H40:Tsawg zog; siv hauv qhov dej ntiav.
J55:Muaj ntau heev rau ob qho tib si casing thiab tubing. Kev ntseeg tau thiab kev lag luam.
K55:Zoo ib yam li J55 tab sis muaj lub zog tensile ntau dua (siv feem ntau rau casing).
N80 (N80-1 / N80-Q):Ib nrab - qib siv hauv qhov dej tob. "Q" sawv cev rau Quenched thiab Tempered.
Pab Pawg 2: Txwv tsis pub tawm (Sour Service / H2S) Qib
Cov qib no tshwj xeeb yog kho kom "softer" lossis ntau dua kom tiv tausSulfide Stress Cracking (SSC)nyob rau hauv ib puag ncig uas muaj Hydrogen Sulfide (H2S).
L80 (L80-1, 9Cr, 13Cr):Kev lag luam tus qauv rauSour Service.
13Cr yog qib "Chrome" siv los tiv thaiv CO2corrosion.
C90 & T95:High - qib muaj zog tsim tshwj xeeb rau ib puag ncig qaub.
C110:Qib siab zog siab tshaj plaws rau H2S kev pabcuam (txheej txheem hardness).
Pawg 3: Siab - Qib Siab
Siv rau qhov sib sib zog nqus, siab - qhov dej siab qhov hnyav ntawm cov hlua hlua nws tus kheej yuav tsum muaj zog heev.
P110:Siab - qib zog. Muaj ntau heev rau kev tsim cov casing hauv qhov tob kab rov tav (shale gas / roj).
Pawg 4: Tshwj xeeb siab -Lub zog
Q125:Muaj zog heev. Siv rau cov qhov dej tob heev lossis tshwj xeeb siab - qauv tsim.
API Standard Casing Connections
API txheem kev sib txuas cia siab rau xov cuam tshuam thiab xov sib txuas (dope) los tsim lub foob.
| Kev sib txuas npe | Cov ntawv luv | Xov Profile | Nta & Daim Ntawv Thov |
| Luv Xov Coupled | STC | Hloov | Zoo sealability tab sis qis zog tensile. Siv rau qhov dej ntiav lossis qis - cov hlua thauj khoom. |
| Ntev Xov Coupled | LTC | Hloov | Cov xov ntev dua muab lub zog tensile ntau dua. Covfeem ntauAPI casing kev twb kev txuas. |
| Buttress Xov Coupled | BTC | Trapezoidal | Buttress threads muabsiab tensile zog heevtxhawb nqa cov hlua hnyav. Zoo tagnrho rau qhov dej tob. |
API Standard Tubing Connections
Tubing kev sib txuas tsom rau kev tswj xyuas lub zog ntawm cov yeeb nkab kawg thiab ua kom muaj kev ruaj ntseg foob rau cov kua dej ntau lawm.
| Kev sib txuas npe | Cov ntawv luv | Cov yam ntxwv zoo | Nta & Daim Ntawv Thov |
| Tsis yog-Txhob Siab Kawg | NUJ | Threaded ncaj qha rau ntawm cov yeeb nkab OD | Tsawg zog vim tias phab ntsa yog thinned los ntawm threading. Tsis tshua muaj siv rau kev tsim khoom niaj hnub no. |
| External Upset End | EUE | Cov yeeb nkab kawg yog forged thicker ua ntej threading | Kev lag luam tus qauv rau tubing. Qhov kev chim siab tsim tau them nyiaj rau lub zog poob, ua rau nws ruaj khov heev. |
| Kev sib koom ua ke | IJ | Txiv neej thiab poj niam threads ntawm cov yeeb nkab nws tus kheej | Tsis xav tau coupling; muaj slim profile. Siv rau hauv qhov chaw txwv lossis me me - txoj kab uas hla ua tiav. |
API 5CT Deep Well Casing specification
| API Qib | Min Yield zog (psi) | Max Yield zog (psi) | Ib puag ncig |
| H40 | 40,000 | 80,000 | Nyuaj / Tsawg Siab |
| J55 / K55 | 55,000 | 80,000 | Standard Onshore Wells |
| N80 | 80,000 | 110,000 | Nruab nrab- qhov tob Wells |
| L80 | 80,000 | 95,000 | Sour Service (H2S) |
| C90 | 90,000 | 105,000 | Sour Service |
| T95 | 95,000 | 110,000 | Sour Service |
| P110 | 110,000 | 140,000 | Sib sib zog nqus / siab |
| Q125 | 125,000 | 150,000 | Cov xwm txheej hnyav |
API 5CT OCTG Hoobkas
API 5CT roj lub teb chaws tubular khoom Test equipments
API 5CT Petroleum Casing Pipe Certificate
FAQ
API casing loj npaum li cas?
API casing dimensions comply with the API 5CT standard and are primarily used for supporting the walls of oil and gas wells. The outer diameter (OD) ranges from 114.3 mm to 508 mm (approximately 4½" to 20"), with wall thicknesses between 5.21 mm and 16.13 mm. Lengths are standardized into three categories: R-1 (4.88–7.62 m), R-2 (7.62–10.36 m), and R-3 (>10.36 m), nrog rau qhov ntev tshwj xeeb xaiv raws qhov tob tob, siab, thiab geological tej yam kev mob.
Dab tsi yog qhov loj ntawm tubing?
Sab nraud txoj kab uas hla (OD) ntawm tubing feem ntau yog li ntawm 60.3 hli mus rau 114.3 hli, nrog ntau qhov ntau thiab tsawg xws li 2⅜ nti (≈60.3 mm), 2⅞ nti (≈73.0 mm), 3½ nti (≈88.9 mm), thiab 4½ nti (≈114.3 mm).
Raws li API 5CT specifications, tubing tau muab faib ua peb hom qauv- tsis yog- chim siab (NU), sab nraud- chim siab (EU), thiab kev sib koom ua ke (IJ)-txhua qhov tsim nyog rau kev thauj cov kua dej raws li qhov sib txawv.
