API 5CT K55 yog tus qauv casing qib uas txhais los ntawm American Petroleum Institute specification 5CT, thiab nws yog ib qho ntawm cov qib siv dav tshaj plaws rau kev tsim kho zoo hauv kev lag luam roj thiab roj. Tsab ntawv K qhia txog cov khoom siv tshuaj thiab cov cuab yeej cuab yeej cuab tam, thaum 55 qhia tias qhov tsawg kawg nkaus tawm lub zog ntawm 55,000 psi (txog 379 MPa). K55 nyob hauv nruab nrab ntawm lub casing lub zog ntau yam: muaj zog dua li qib H40 theem pib tab sis tseem pheej yig rau cov qauv zoo niaj hnub.
Mechanical Properties
| Khoom | Tus nqi | Nco tseg |
|---|---|---|
| Qib | K55 | API 5CT pawg 1 qib |
| Yam tsawg kawg nkaus yield zog | 55,000 psi (379 MPa) | Kev ntxhov siab ntawm qhov pib deformation mus tas li |
| Maximum yield zog | 80,000 psi (552 MPa) | Upper cap uas cais K55 los ntawm cov qib siab dua |
| Tsawg kawg tensile zog | 95,000 psi (655 MPa) | Tshwj xeeb yam tsawg kawg nkaus, tsis zoo li qib J55 |
| Elongation | Raws li cov qauv elongation ntawm API 5CT rau cov qauv siv | Nyob ntawm tus qauv ntoo khaub lig- ntu ntu thiab lub zog tensile |
| Hardness | Tsis muaj kev txwv rau K55 | Kev txwv hardness tsis tau txhais rau qib no |
Qhov kev xav tau tensile yog cov cuab yeej uas pom meej meej cais K55 los ntawm J55. Ob qib sib koom tib yam 55,000 psi yam tsawg kawg nkaus lub zog, tab sis J55 tsis tau teev qhov tsawg kawg nkaus tensile lub zog, thaum K55 yuav tsum ncav cuag 95,000 psi (655 MPa) thiab yog tsim nyob rau hauv nruj nruj tswj.
Dimensions, Nyhav thiab Threads
Casing yog txiav txim los ntawm sab nraud txoj kab uas hla thiab lub cev hnyav. Qhov hnyav ntawm ib ko taw kho cov phab ntsa tuab rau txoj kab uas hla, thiab qhov hnyav dua ua rau muaj kev sib tsoo ntau dua thiab tawg tsis kam nrog rau me me hauv txoj kab uas hla.
| Nominal loj (hauv) | Sab nraud txoj kab uas hla (mm) | Cov qauv hnyav hnyav (lb / ft) |
|---|---|---|
| 4-1/2 | 114.3 | 9.50 – 15.10 dr hab |
| 5-1/2 | 139.7 | 15.50 – 23.00 dr hab |
| 7 | 177.8 | 20.00 – 38.00 dr hab |
| 9-5/8 | 244.5 | 32.30 – 53.50 dr hab |
Drift txoj kab uas hla: txhua qhov ntev yuav tsum dhau qhov nruj drift mandrel ntawm txoj kab uas hla tau teev nyob rau hauv tus qauv, uas lav tias cov cuab yeej downhole thiab phom tuaj yeem khiav los ntawm txoj hlua.
Phab ntsa thickness ua raws li qhov hnyav ntawm tus qauv; nominal masses tau hais rau lub tiaj -kawg yeeb nkab thiab nce thaum threads thiab couplings haum.
Qhov kawg kawg: casing feem ntau yog muab threaded thiab txuas, nrog API tus qauv xov xws li luv round xov, ntev round xov los yog buttress xov, los yog nrog ib tug hwm kev twb kev txuas qhov twg roj nruj nreem load yuav tsum tau.
Ntev ntev ua raws li API 5CT ntau qhov system, npog luv luv, nruab nrab thiab ntev ntev, thiab qhov yuav tsum tau muaj ntau yam yuav tsum tau hais rau ntawm qhov kev txiav txim vim tias tuav thiab rig pem teb xyaum nyob ntawm nws.
Kev xav tau tshuaj
| Element | Kev xav tau rau K55 |
|---|---|
| Carbon, C | Tsis kho los ntawm cov khoom specification; xaiv los ntawm cov chaw tsim khoom kom ncav cuag lub zog band |
| Manganese, Mn | Tsis kho los ntawm cov khoom specification |
| Phosphorus, P | Tsawg dua lossis sib npaug li 0.030% |
| Sulfur, S | Tsawg dua lossis sib npaug li 0.030% |
API 5CT tso cai txwv tsis pub muaj phosphorus thiab sulfur, uas yog cov ntsiab lus uas feem ntau puas toughness thiab weldability, thiab tawm carbon thiab manganese rau cov chaw tsim tshuaj paus, leej twg yuav tsum tseem xa cov yield thiab tensile ntau yam. Cov neeg yuav khoom uas xav tau kev ntseeg siab ntxiv txog thaj chaw weldability thov kom cov pa sib npaug yuav tsum tau tshaj tawm ntawm daim ntawv pov thawj zeb nrog rau kev ntsuas kub.
Kev tsim khoom thiab kev siv
K55 casing yog tsim los ntawm seamless los yog hluav taws xob tsis kam vuam, thiab ob txoj kev tau tso cai rau qib.
Cov kev pab cuam ib txwm yog ntiav mus rau nruab nrab qhov tob qhov dej, qhov chaw ntawm qhov chaw, cov hlua nruab nrab ntawm cov hlua thiab cov ntaub ntawv siv nyob rau hauv qhov tsis yog- nruj, qab zib ib puag ncig.
Qib tsis pom zoo rau cov kev pabcuam qaub uas muaj hydrogen sulphide tshwj tsis yog nws tau tshwj xeeb tsim nyog rau lub luag haujlwm ntawd, vim tias cov sulphide kev nyuaj siab tawg tsis kam ntawm cov pa roj carbon -manganese casing qib yog txwv.
Kev xaiv yog tsim los ntawm kev tsim cov khoom zoo: sab hauv yield siab, vau siab, tensile load los ntawm txoj hlua hnyav, thiab ib qho dabtsi yog khoov lossis thermal load thaum lub sij hawm installation thiab ntau lawm.
Qhov twg xav tau lub zog ntau dua rau cov hlua sib sib zog nqus los yog ntau dua, cov kauj ruam tom ntej hauv API 5CT ntau yog cov qib siab dua xws li N80 thiab siab dua - qib zog saum toj no.
Ordering thiab Inspection Points
Qhia cov qib, sab nraud txoj kab uas hla, qhov hnyav tsim, qhov ntev, qhov kawg tiav thiab xov hom, ntxiv rau cov kev xav tau ntxiv xws li kev sim lossis kos npe teev hauv tus qauv.
Tshawb xyuas daim ntawv pov thawj zeb tiv thaiv qib kev txiav txim, thiab xyuas tias qhov ntsuas qhov tensile tsawg kawg nkaus tau ntsib, vim qhov ntawd yog cov cuab yeej uas txawv K55 los ntawm pheej yig dua J55.
Tshawb xyuas cov ntaub ntawv xeem drift: qhov tshwm sim ntawm drift mandrel yog qhov ua tau zoo tias lub taub sab hauv yog qhov tseeb rau cov cuab yeej downhole.
Tshawb xyuas cov xov thiab txuas txuas rau kev puas tsuaj thiab paub meej tias hom xov raug raug thiab ua rau- tiv thaiv kom haum rau kev thauj mus los.
Paub meej tias kev kos npe ntawm qib, qhov loj me, qhov hnyav, tus naj npawb ntawm cov cua sov thiab cov chaw tsim khoom kom traceability nyob ntawm qhov chaw rig.
FAQ
Q: Lub npe K55 txhais li cas hauv API 5CT?
Tsab ntawv K txheeb xyuas cov chav kawm tshuaj thiab cov cuab yeej cuab tam, thiab 55 sawv cev rau qhov tsawg kawg nkaus yield zog ntawm 55,000 psi, uas yog hais txog 379 MPa. Cov qib yog carbon-manganese casing steel nrog cov txiaj ntsig ntau txog 80,000 psi.
Q: Qhov txawv ntawm J55 thiab K55 yog dab tsi?
Ob leeg muaj tib yam tsawg kawg nkaus lub zog ntawm 55,000 psi, tab sis K55 yog ib qho kev qhia tsawg kawg nkaus tensile lub zog ntawm 95,000 psi, thaum J55 tsis muaj yam tsawg kawg nkaus tensile yuav tsum tau. K55 kuj yog tsim nyob rau hauv nruj dua zoo thiab raug tswj.
Q: Puas yog K55 haum rau kev pabcuam qaub?
Nws tsis pom zoo rau cov kev pabcuam uas muaj hydrogen sulphide tshwj tsis yog tias tsim nyog. K55 yog tsim los rau cov uas tsis yog - txhoj puab heev, qab zib ib puag ncig, thiab qaub qhov dej ib txwm xav tau ib qib xaiv rau sulphide kev nyuaj siab tawg.
Q: Cas casing loj thiab hnyav xaiv?
Los ntawm kev tsim cov khoom siv zoo: sab nraud txoj kab uas hla teeb tsa lub qhov geometry, thiab qhov hnyav tsim kho cov phab ntsa tuab, uas nyob rau hauv lem tswj cov khoom siv sab hauv, kev sib tsoo tsis sib haum thiab cov kab hauv qab muaj rau cov cuab yeej. Lub cev hnyav dua muab lub zog ntau dua tab sis txo qis hauv kev tshem tawm.
Q: Dab tsi yog qhov drift txoj kab uas hla thiab vim li cas nws tseem ceeb?
Nws yog txoj kab uas hla ntawm ib lub mandrel nruj uas yuav tsum dhau los ntawm kev ywj pheej ntawm cov yeeb nkab raws li tau teev tseg hauv tus qauv. Nws ua pov thawj tias lub casing bore yog qhov tseeb thiab ncaj txaus rau cov cuab yeej downhole, uas yog vim li cas qhov kev sim drift yog ib qho ntawm cov ntaub ntawv lees paub cov neeg yuav khoom yuav tsum tshuaj xyuas.
Q: Hom xov twg muaj rau K55 casing?
API txheem threads xws li luv round thread, ntev round thread thiab buttress thread yog ib qho kev xaiv, muab threaded thiab txuas. Cov kev sib txuas hwm tuaj yeem muab tau qhov twg tus qauv tsim yuav tsum tau txhim kho cov roj nruj los yog muaj peev xwm khoov siab dua.
