API 5CT K55 - Specification rau Casing thiab Tubing (K55 Qib)
API Specification 5CT K55yog aseamless thiab welded steel casing / tubing qibnrogkev tswj tshuaj nruj duatshaj J55, tsim los rau kev thov roj thiab roj ntau dua, tshwj xeeb tshaj yog nyob qhov twgqaub kev pab cuam kujlos yogkev kho cua sov tshwj xeebyog yuav tsum tau.
Cov yam ntxwv tseem ceeb
| Feature | Kev piav qhia |
|---|---|
| Khoom siv | Tswj Chemistry Carbon -Manganese Steel |
| Kev tsim khoom | Seamless (SMLS) lossis Electric Resistance Welded (EW) |
| Kev Xav Tau Tshwj Xeeb | Kev tswj tshuaj nruj duayog j55 |
| Kev siv thawj zaug | Intermediate casing, ntiav ntau lawm casing |
Qib Lub ntsiab lus
"K"= Qeb tshwj xeeb tswj chemistry
"55"= Yam tsawg kawg yield zog nyob rau hauvkpsi ua(55,000 psi=379 MPa)
Mechanical Requirements
Tensile Properties:
| Khoom | Kev xav tau |
|---|---|
| Yield zog | 379-552 MPa (55-80 ksi) |
| Tensile zog, min | 655 MPa (95 ksi) |
| Yield/Tensile Ratio | Tsawg dua lossis sib npaug li 0.80 |
| Elongation, min | Raws li cov qauv hauv spec |
Hardness txwv:
Maximum Hardness: 255 HWBlos yog26 HRC
Rau kev pabcuam qaub:Yuav tsum ua raws li NACE MR0175 / ISO 15156 cov cai
Qhov txawv ntawm J55: Kev Tswj Tshuaj
K55 muaj SPECIFIED CHEMICAL COMPOSITION txwv, tsis zoo li J55 qhov twg chemistry yog cov chaw tsim khoom xaiv.
Chemical Requirements (yuav tsum tau):
| Element | Kev sib xyaw (%) | Sau ntawv |
|---|---|---|
| Carbon (C), max | 0.45 | Tsawg dua li J55 |
| Manganese (Mn), max | 1.60 | Tswj tau ntau yam |
| Phosphorus (P), max | 0.030 | Tswj impurity |
| Sulfur (S), max | 0.030 | Tswj impurity |
| Silicon (Si) | Tsis tau teev tseg | |
| Qhov tseem ceeb: | Sulfur Tsawg dua lossis sib npaug rau 0.030% THIAB Phosphorus Tsawg dua lossis sib npaug rau 0.030% |
Manufacturing & Processing
Txoj kev tsim khoom:
Seamless (SMLS):Thawj txoj hauv kev rau K55
Electric Resistance Welded (EW):Kuj tso cai
Kev kho cua sov xaiv:
Li qub(feem ntau rau K55)
Normalized thiab Tempered
Quenched thiab Tempered(rau cov ntawv thov tshwj xeeb)
Tsis feem ntau muab raws li - dov(tsis zoo li J55)
Kev ua haujlwm tshwj xeeb:
Kev ua zoo lisfeem ntau siv
Kev tswj deoxidationrau qhov sib xws
Cov txheej txheem nruj duathoob plaws hauv kev tsim khoom
Kev xeem yuav tsum tau
| Kuaj | Kev xav tau | Lub hom phiaj |
|---|---|---|
| Tshuaj ntsuam xyuas | Yuav tsum tau ua kom sov | Txheeb xyuas qhov txwv tsis pub muaj |
| Tensile Test | 2 rau kev kho cua sov ntau | Kev kuaj xyuas tshuab |
| Hydrostatic Test | Txhua qhov sib koom | Siab ncaj ncees |
| Hardness Test | Rau ntau | H₂S haum |
| Impact Test | Xaiv tau | Rau qhov kub thiab txias |
| SSC Test | Yog hais tias | Sulfide kev nyuaj siab tawg |
Hydrostatic Test Siab:
Tib yam formula raws li J55:
ntawv nyeem
P=(2 × 0.80 × Ymin × t) / D Yam tsawg kawg nkaus xeem: 5 vib nas this
Cov ntawv thov tseem ceeb
1. Roj & Roj qhov dej:
Intermediate Casing:Los ntawm teeb meem formations
Shallow Production Casing:Thaum nruab nrab lub zog xav tau
Dej / Gas Txhaj Qhov Dej:Tswj chemistry txo cov corrosion
Geothermal Wells:Kev pabcuam kub nruab nrab
2. Vim li cas thiaj xaiv K55 dhau J55:
| Vim li cas thov | Kev piav qhia |
|---|---|
| Sour Service Potential | Tswj chemistry txhim kho H₂S kuj |
| Weldability zoo dua | Cov ntsiab lus carbon tsawg dua li J55 |
| Kev kho cua sov xav tau | Normalized qauv zoo ib yam |
| Kev Cai Lij Choj | Qee thaj chaw tswj hwm kev tswj hwm chemistry |
| Corrosive Ib puag ncig | Cov residuals qis txo tus nqi corrosion |
3. Kev txwv qhov tob:
Hom Qhov tob:0-8,000 ft (0-2,400 m)
Collapse / tawg:Zoo ib yam li J55, tab sis cov khoom zoo sib xws
Kub:Haum rau feem ntau qhov dej (<150°C/300°F)
Sour Service Considerations
NACE MR0175 / ISO 15156 Kev Ua Tau Zoo:
| Kev xav tau | K55 Status |
|---|---|
| Maximum Hardness | Tsawg dua los yog sib npaug rau 22 HRC (yuav tsum tau ua rau qaub) |
| Kev kho cua sov | Normalized los yog Q&T pab tau raws li hardness |
| Chemistry Control | Sulfur/phosphorus txwv tsis pub muaj txiaj ntsig |
| Yield zog | Tsawg dua lossis sib npaug li 80 ksi raws li Zone 0/1 cov cai |
| Hom kev siv hauv Sour: | Nrog kev tswj kom zoo hardness |
Sulfide Stress Cracking (SSC) Resistance:
K55 feem ntau zoo dua J55vim chemistry tswj
Normalized microstructuretiv taus ntau dua li - dov
Yuav tsum xyuas kom meej hardnessrau tej yam kev pab tshwj xeeb
Sib piv nrog lwm cov qib API 5CT
| Qib | Qhov txawv ntawm qhov tseem ceeb ntawm K55 |
|---|---|
| J55 | Tsis muaj chemistry specification, feem ntau raws li - dov |
| K55 | Tswj chemistry, feem ntau normalized |
| N80 | Lub zog siab dua (80 ksi), feem ntau Q&T |
| L80 | Tshwj xeeb rau kev pabcuam qaub, hardness tswj |
| C90 | Siab zog nrog SSC tsis kam |
| C95 | Zoo ib yam li C90 nrog kev sim sib txawv |
Kev txiav txim siab tsim
1. Kev xaiv kev sib txuas:
| Xov Hom | Daim ntawv thov K55 |
|---|---|
| STC/LTC | Standard API kev sib txuas |
| BTC | Zoo dua rau compression / nro |
| Hwm | Cov qhov dej tseem ceeb, kev pabcuam corrosive |
| Kev tsis sib xws | Tsis muaj coupling, zoo clearance |
2. Kev ntsuas siab (Piv txwv: 7 "23 lb/ft):
| Kev ntsuas | Tus nqi | Sib piv rau J55 |
|---|---|---|
| Sab hauv Yield | 5,240 psi | Zoo sib xws |
| Quav Siab | 4,760 psi | Zoo sib xws |
| Kev sib koom ua ke | 485,000 Ib | Zoo sib xws |
| Kev sib raug zoo | Zoo dua | Xav paub ntau ntxiv |
3. Triaxial Tsim:
Ntau cov khoom sib xwspab kev ua qauv zoo
Txo cov khoom tawgyog j55
Kev coj cwj pwm zoonyob rau hauv ua ke loads
Kev Tiv Thaiv Tsis Ua Haujlwm
1. Corrosion Mitigation:
Internal Coatings:Epoxy, yas, CRAs
Inhibitors:Kev kho mob tsis tu ncua lossis batch
Kev tiv thaiv Cathodic:Sab nrauv
Kev xaiv khoom siv:K55 zoo dua J55 rau me ntsis corrosion
2. Kev Pov Hwm Zoo:
Tshuaj ntsuam xyuasrau txhua qhov cua sov
Cov ntaub ntawv kho cua sovyuav tsum tau
Hardness daim ntawv qhiarau kev pabcuam qaub
NDEntau dua li qhov xav tau yam tsawg kawg nkaus
Kev xav txog nyiaj txiag
Tus nqi hwm tshaj J55:
Khoom siv:10-20% siab dua
Tus nqi ua:Normalizing ntxiv cov nuj nqis
Tus nqi kuaj:Tshuaj ntsuam xyuas ib lub tshav kub
Zuag qhia tag nrho:15-25% premium tshaj J55
Value Justification:
| Cov txiaj ntsig | Kev cuam tshuam nyiaj txiag |
|---|---|
| Kev sib raug zoo | Txo engineering yam kev nyab xeeb |
| Corrosion Resistance | Lub neej ua haujlwm ntev dua, kev ua haujlwm tsawg dua |
| Weldability | Tsawg vuam / kho cov nqi |
| Txoj Cai Ua Raws Cai | zam kev tsis ua raws - kev nplua |
| Sour Service Muaj peev xwm | Pab kom siv tau ntau yam ntawm cov qhov dej |
International sib npaug
| Thaj tsam | Standard sib npaug | Sau ntawv |
|---|---|---|
| ISO | ISO 11960 K55 | Ib yam specification |
| Russia | GOST 632 K55 | Cov khoom zoo sib xws |
| Tuam Tshoj | SY/T 6194 K55 | API 5CT txais yuav |
Ordering Information
Qhov tseem ceeb Specifications:
Specification:API 5 CT
Qib: K55
Hom:Casing los yog Tubing
Loj:OD thiab Nyhav
Ntev:Range 2 (28-32 ft) lossis Range 3 (Ntau dua lossis sib npaug li 42 ft)
Xov:API lossis hwm kev sib txuas
Kev kho cua sov:Normalized (xws li yog tias xav tau)
Ntxiv:Sour kev pabcuam xav tau
Sample Purchase Specification:
ntawv nyeem
API 5CT K55 Casing, 7 "OD, 23 lb / ft, Range 3, Buttress Thread (BTC), normalized heat treatment, Chemical analysis report per heat, Hardness<=22 HRC around, For sour service per NACE MR0175.
Cov ntaub ntawv zoo
Yuav tsum tau ntawv pov thawj:
Mill Test Certificatenrog chemistry
Cov ntaub ntawv kho cua sov
Daim ntawv qhia txog hardness
Cov ntaub ntawv ntsuas hydrostatic
Traceabilitykom kub tooj
Cov Lus Cog Tseg:
Txhua qhov sib koom ua ke cim nrog:
API 5CT K55
Kub naj npawb
Qhov hnyav
Chaw tsim tshuaj paus
Lub teb chaws ntawm keeb kwm
Lub hli / xyoo ntawm kev tsim khoom
Kev Ua Lag Luam Zoo Tshaj Plaws
Rau Sour Service:
Qhia qhov siab tshaj plaws hardness(22 HRC feem ntau)
Yuav tsum tau kho cua sov kom zoo
Tshawb xyuas chemistryua tau raws li qhov yuav tsum tau ua
Xav txog kev xeem SSCyog H₂S mob hnyav
Tshawb xyuas cov txheej txheem tsim khoomnrog tus muag khoom
Rau Critical Wells:
Hwm kev sib txuasrau kev ncaj ncees
Tag nrho -ntev soj ntsuam(UT / EMI)
Kev soj ntsuam zoontawm qhov chaw tsim khoom
Kev sim ua tim khawvntawm cov qauv
Thib peb-kev soj ntsuam togpom zoo
Kab hauv qab:API 5CT K55 muabtswj chemistry casing/tubingrau daim ntawv thov xav tauntau sib xws thiab kwv yeestshaj tus qauv J55, tshwj xeeb tshaj yog muaj txiaj ntsig raume ntsis corrosive ib puag ncig, qaub kev pab cuam muaj peev xwm, los yog cov ntaub ntawv uas cov khoom sib xwsyog qhov tseem ceeb rau kev ncaj ncees thiab kev tsim raug.
