Feem ntau cov qib casing steel yog feem ntau ntawm tib cov tshuaj muaj pes tsawg leeg. Dab tsi muab txhua qib nws cov khoom sib txawv yog hom kev kho cua sov siv. Cov qib casing feem ntau txawv ntawm lawv cov khoom siv zog, lub zog tensile, thiab hardness.
Cov kev xeem ntxiv uas yuav tsum tau ua los ntawm API 5CT rau qee pawg ntawm cov casing kom paub tseeb tias txhua qib casing haum rau nws daim ntawv thov.
Common Application Casing (H40, J55, K55, M65, N80, R95)
Vim lawv cov nqi qis dua piv rau lwm qib steel, cov kav dej ntawm qib J55, K55, thiab N80 yog qhov kev xaiv nrov rau cov qhov dej tsis muaj zog tiv thaiv corrosion lossis lub zog yuav tsum tau ua.
M65, thiab R95 yog qib tshiab, txhua tus nrog lawv tus kheej daim ntawv thov. Cov qib casing no feem ntau sib txawv ntawm lawv lub zog tawm los thiab lub zog tensile.
H40
Yield zog: 276-552 MPa (40-80 ksi),
Tsawg tensile zog: 414 MPa (60 ksi)
API xim code: Tsis muaj lossis 1 band dub
J55
Yield zog: 379-552 MPa (55-80 ksi),
Tsawg tensile zog: 517 MPa (75 ksi)
API xim code: 1 ci ntsuab band
K55
API qib K55 muaj cov txiaj ntsig zoo ib yam li qib J55, tab sis nws lub zog tensile yam tsawg kawg nkaus yog li 26% siab dua piv rau J55.
Yield zog: 379-552 MPa (55-80 ksi),
Tsawg tensile zog: 665 MPa (95 ksi)
API xim code: 2 ci ntsuab bands
M65
Tsis siv ntau zaus, M65 yog qib steel nkaus xwb ntawm cov hom phiaj dav dav nrog rau qhov yuav tsum tau muaj kev txwv siab tshaj plaws.
Yield zog: 448-586 MPa (65-85 ksi),
Tsawg tensile zog: 586 MPa (85 ksi)
API xim code: 1 ci ntsuab band + 1 xiav band
N80 (N80-1, N80-Q)
Ob leeg N80-1 thiab N80-Q muaj tib lub zog tawm los thiab lub zog tensile, tab sis N80-Q, uas yog quenched thiab tempered, qhia tau hais tias muaj zog ntau dua rau sab hauv siab thiab sib tsoo.
Ntawm qhov tod tes, casing N80-1 yog pheej yig dua los tsim thiab thawj qhov kev xaiv yog kev sib tsoo ntau dua hauv qhov tsis xav tau.
Yield zog: 552-758 MPa (55-80 ksi),
Tsawg tensile zog: 689 MPa (100 ksi)
API xim code: 1 liab (N80-1), 1 liab band + 1 ci ntsuab band (N80-Q)
R95
Tib lub zog muaj zog ntau yam thiab tensile lub zog raws li qib T95, tab sis tsis muaj qhov yuav tsum tau rau SSC lossis hardness tests. Steel qib R95 yog li ntawd yog ib qho zoo-nqi lwm txoj rau T95 hauv qhov dej tsis muaj kev pheej hmoo ntawm sulfide kev nyuaj siab tawg.
Yield zog: 655-758 MPa (95-110 ksi),
Tsawg tensile zog: 727 MPa (105 ksi)
API xim code: 1 xim av band
Corrosion-Resistant Casing (L80, C90, T95, C110)
Sour Service
API 5CT steel qib L80-1, C90, T95, thiab C110 qhia tau hais tias muaj kev tiv thaiv ntau dua rau sulfide kev ntxhov siab tawg hauv H2S ib puag ncig vim qis qis ntawm sulfur thiab phosphorous thiab ntxiv rau cov kev sim hauv qab no:
Hardness: Txwv siab tshaj plaws hardness (L80, C90, T95, C110)
Cov qoob loo loj: Cov qoob loo loj dua ASTM 5 (C90, T95, C110)
Sulfide stress cracking (SSC): Hla NACE 0177 (C90, T95, C110)
Qab zib Service
Casing qib L80-9Cr thiab L80-13Cr yog haum rau daim ntawv thov hauv CO2 ib puag ncig, feem ntau vim lawv cov ntsiab lus chromium siab dua.
L80 (L80-1, L80-9Cr, L80-13Cr)
Yield zog: 552-665 MPa (80-95 ksi),
Tsawg tensile zog: 655 MPa (95 ksi)
API xim code (bands): 1 liab + 1 xim av (L80), 1 liab + 1 xim av + 2 daj (L80 9Cr), 1 liab + 1 xim av + 1 daj (L80 13Cr)
C90 (C90-1)
Yield zog: 621-724 MPa (90-105) ksi,
Tsawg tensile zog: 689 MPa (100 ksi)
API xim code: 1 liab band
T95 (T95-1)
Yield zog: 655-785 MPa (95-110 ksi),
Tsawg tensile zog: 724 (105 ksi)
API xim code: 1 silver band
C110
Yield zog: 758-828 MPa (110-120 ksi)
Tsawg tensile zog: 793 MPa (115 ksi)
API xim code: 1 dawb band + 2 xim av bands
Nco ntsoov tias txawm hais tias qhov kev xeem yuav tsum tau ua ntxiv, nws yog lub luag haujlwm ntawm tus neeg yuav khoom los txiav txim siab seb qhov kev pabcuam qaub tau txais txiaj ntsig zoo li cas rau daim ntawv thov npaj.
Lub qhov dej tob (P110, Q125)
Nrog rau qhov ua tau zoo tshaj plaws ntawm tag nrho cov qib API 5CT casing, P110 thiab Q125 yog qhov tsim nyog rau kev tsim kev kub ntxhov hauv qhov dej tob.
Txawm li cas los xij, raws li cov hlau ua rau muaj kev cuam tshuam rau sulfide kev nyuaj siab tawg qhov siab dua lub zog tawm los, ob qib yuav tsum tsis txhob siv hauv H2S ib puag ncig.
P110
Yield zog: 758-965 MPa (110-140 ksi)
Tsawg tensile zog: 862 MPa (125 ksi)
API xim code: 1 dawb band
Q125 (Q125-1)
Yield zog: 862-1,034 MPa (125-150 ksi)
Tsawg tensile zog: 931 MPa (135 ksi)
API xim code: 1 txiv kab ntxwv band
Vigor's tubing yog tsim thiab tsim nyob rau hauv nruj raws li API 5CT cov qauv, thiab cov khoom zoo tau lees paub los ntawm cov neeg siv khoom. Yog tias koj txaus siab rau Vigor's API 5CT tubing lossis kev pabcuam, thov tsis txhob yig tiv tauj nrog Vigor pawg kws tshaj lij rau cov khoom lag luam zoo tshaj plaws thiab kev txhawb nqa.
