API 5CT C90 Casing rau Sour Service: Ib qho kev piav qhia
API 5CT C90 casing yog qhov siab -lub zog quenched thiab tempered OCTG qib uas tuaj yeem xaiv rau cov ntawv thov kev pabcuam qaub thaum ua raws li NACE MR0175/ISO 15156 cov cai. Ua raws li API 5CT thiab NACE MR0175 / ISO 15156 tus qauv, nws muaj kev tswj hwm nrog lub zog tsawg kawg nkaus ntawm 621 MPa thiab siab tshaj tawm lub zog ntawm 724 MPa. Lub hardness txwv ntawm 25.4 HRC pab txo qis kev cuam tshuam rau sulfide kev ntxhov siab tawg nyob rau hauv cov kev pabcuam qaub. Lub casing no npog txheej diameters los ntawm 114.3 hli mus rau 339.72 hli thiab ua hauj lwm cia siab rau ntawm qhov kub thiab txias mus txog 65 degree, xa cov neeg kho tshuab stability thiab corrosion kuj rau nruab nrab - mus rau -sib sib zog nqus qaub hydrocarbon reservoirs.
1. Kev siv thawj zaug thiab kev siv
API 5CT C90 casing ua hauj lwm rau lub hom phiaj downhole structural thiab kua cais lub luag hauj lwm nyob rau hauv nruab nrab -qhov tob qaub roj thiab roj qhov dej nrog tswj corrosive tej yam kev mob.
- Nruab nrab -qhov tob qaub qhov zoo xa mus:Lub casing no tau teev tseg rau qhov tob ntawm qhov tob ntawm 3,500 m txog 5,500 m, haum rau cov cheeb tsam qaub qhov twg hydrogen sulfide ib nrab siab thiab kev ua haujlwm raws li NACE MR0175 / ISO 15156 cov khoom siv.
- Ntau lawm thiab nruab nrab txoj hlua installation:Nws ua haujlwm raws li ob qho tib si cov khoom tsim thiab cov kab nruab nrab cov hlua rau cov roj qaub thiab cov roj qhov dej, txhim kho cov qauv hauv lub cev thiab cais cov kua dej ua kom tsis zoo los tiv thaiv kev ua haujlwm tsis zoo.
- Standard dimensional daim ntawv thov:Npog txheej diameters ntawm 4.5 "mus rau 13.375" (114.3 mm txog 339.72 mm) thiab phab ntsa thicknesses ntawm 1.0 mm mus rau 30 mm, nws phim feem ntau pa nruab nrab - sib sib zog nqus zoo qauv designs.
- Tswj kub ib puag ncig kev pabcuam:Adaptable rau downhole kub txog li 65℃nyob rau hauv qaub tej yam kev mob, zam dhau hardness deterioration uas cuam tshuam rau NACE MR0175-raws li SSC kev ua tau zoo.
- Standard industrial kua conveyance:Pom zoo rau kev thauj mus los hauv av ntawm cov roj av, roj av, thiab tsim cov dej hauv cov av qaub, nws ua tau raws li API 5CT / ISO 11960 specifications thiab cuam tshuam nrog API 5L nto sib sau cov kav dej.
2. Cov txiaj ntsig tseem ceeb thiab qhov zoo
API 5CT C90 casing integrates precise chemical control thiab standardized heat treatment kom xa cov neeg kho tshuab zoo ib yam thiab tiv thaiv -corrosion kev ua tau zoo nyob rau hauv ib puag ncig qaub.
- Strict mechanical cuab yeej tswj:Nws tuav lub zog ruaj khov ntawm 621-724 MPa thiab lub zog tensile yam tsawg kawg nkaus ntawm 689 MPa, nrog rau 0.5% lav load elongation, tsis txhob brittleness tshwm sim los ntawm ntau tshaj - ntxiv dag zog rau cov uas tsis yog - qaub qib steel.
- Tsim nyog los tiv thaiv - qaub corrosion kev ua tau zoo:Txwv rau qhov siab tshaj plaws 25.4 HRC hardness (255 HBW), nws ua tau raws li NACE MR0175 qhov pib, tiv thaiv kev ua tsis tiav SSC thiab HIC hauv ntub H₂S- muaj qhov chaw ib puag ncig downhole.
- Optimized tshuaj muaj pes tsawg leeg tsim:Tswj cov ntsiab lus siab tshaj plaws ntawm 0.35% thiab sulfur cov ntsiab lus ntawm 0.01%, nrog 0.25-0.85% molybdenum thiab 1.50% chromium los txhim kho microstructure stability thiab tiv thaiv - tawg muaj peev xwm.
- Standardized kev kho cua sov txheej txheem:Yuav tsum tau quenching thiab tempering (Q&T) refines internal grain qauv, sib npaug siab zog thiab toughness thaum tshem tawm cov kev ntxhov siab nyob rau hauv cov kav dej tiav.
- Ua kom tiav cov qauv tshuaj xyuas ua raws:Txhawb nqa PSL2-theem pov thawj, suav nrog kev sim hydrostatic, UT / MT kev ntsuas tsis muaj kev puas tsuaj, thiab SR15 SSC kuaj ib NACE TM0177, kom ntseeg tau tias tag nrho cov lus qhia txog kev taug qab.
Casing Hoobkas
3. Kev Txhim Kho Yav Tom Ntej
API 5CT C90 casing txuas ntxiv mus rau qhov kev ua kom zoo dua qub thiab kev ua haujlwm tau zoo dua qub kom hloov mus rau qhov nyuaj ntxiv rau kev siv lub pas dej qaub.
- Stricter chemical tolerance iteration:Kev txhim kho kev lag luam tsis tu ncua ntxiv txo cov phosphorus impurities kom qis dua 0.015% hauv cov khoom lag luam hwm, txo qis micro- cov kev pheej hmoo tsis raug thiab txhim kho ntev - lub sij hawm qaub kev pabcuam ruaj khov.
- Txhim kho ntau -corrosion adaptation:Hloov kho C90 qhov sib txawv tau tsim los ua kom muaj kev sib koom ua ke H₂S thiab qis -concentration CO₂, nthuav kev siv tau rau hauv qhov chaw sib xyaw corrosive downhole.
- Txhim kho qhov ntev kam rau ua qhov tseeb:Hloov kho API 5CT specifications nruj phab ntsa thickness tsis zoo kam rau ua rau -12.5% thiab optimize cov txheej txheem sab nraud sib txawv rau high-pressure zoo sib xws.
- Complementary Performance certification expansion:Ntau cov haujlwm engineering suav nrog SR16 HIC kev sim thiab SR2 qis- ntsuas qhov ntsuas kub kom txuas ntxiv kev ntseeg tau hauv cov caij nyoog huab cua thiab sib sib zog nqus- zoo.
- Kev sib txuas hwm zoo sib xws hloov kho:Hloov maj mam hloov cov qauv STC/LTC xov nrog BTC thiab cov kev sib txuas tshwj xeeb tshwj xeeb txhim kho kev sib khi ruaj khov nyob rau hauv ntev - voj voog qaub zoo ua haujlwm scenarios.
Xaus
API 5CT C90 casing yog tus qauv siab -kev ua tau zoo OCTG kev daws teeb meem rau nruab nrab- qhov tob qaub roj thiab roj qhov dej, nrog rau cov neeg kho tshuab tsis muaj pov thawj thiab muaj ntawv pov thawj los tiv thaiv-kev ua haujlwm qaub. Nws tswj hardness, optimized alloy muaj pes tsawg leeg, thiab standardized tshav kub kho kom ruaj khov tsis kam mus H₂S-induced cracking. Cov kev qhia tshwj xeeb thiab kev hloov kho tshiab txuas ntxiv txhawb nqa nws txoj kev siv tau rau cov pa thiab nruab nrab txoj kev qaub qaub reservoir exploitation thoob ntiaj teb oilfield kev khiav hauj lwm.