1. Dab tsi yog API spec 5ct?
API spec 5ct yog ib qho qauv luam tawm los ntawm Asmeskas Petroleum Lub Koom Haum (API) uas qhia txog cov roj ntsha (cov roj) siv rau hauv cov roj thiab roj kev lag luam rau cov dej.
:Loj - Txoj kab uas hla hla uas yog cemented nyob rau hauv qhov chaw mus rau kab lub condebore. Its primary functions are to prevent the wellbore from collapsing and to isolate different underground zones (eg, to keep water out of the oil-producing zone).
Tubing:Me me -} txoj kab uas hla uas khiav sab hauv cov roj lossis roj yog tsim rau saum npoo.
Tus qauv txhais tau tias yuav tsum muaj rau:
Qhov loj me, cov tes taw hnyav, thiab xov.
Hlau cov khoom siv sib xyaw ua ke hlau (cov khoom siv).
Cov cuab yeej ua lwm yam (piv txwv li, tawm los lub zog, tensile lub zog, Hardness).
Kev sim cov txheej txheem (piv txwv li, hydrostatic kev sim, tsis- kev sim siab).
2. Dab tsi yog "J55 hom lus txhais tau li cas?
"J55" yog aKhoom Siv Khoomtxhais nyob rau hauv API 5CT tus qauv. Nws qhia cov khoom siv yam tsawg kawg nkaus cov hlau yuav tsum muaj.
Lub "j" keeb kwm sawv rau "qib kawm," thiab "55" yog hais txog nwsYam tsawg kawg nkaus xwb Zog.
Yam tsawg kawg nkaus paib zog:55,000 psi (phaus ib square nti) lossis379 MPa(Megapualals). Cov txiaj ntsig lub zog yog qhov kev ntxhov siab uas cov khoom pib ua kom muaj kev cuam tshuam plastically (mus tas li).
Cov Khoom Tseem Ceeb Cov Khoom Siv Rau API 5CT J55:
| Ntiag tug | Tus nqi (Imperial) | Tus nqi (metric) | Tsab ntawv |
|---|---|---|---|
| Yield zog (min) | 55,000 psi | 379 MPa | Nov yog cov cuab yeej txhais. |
| Yield zog (Max) | 80,000 psi | 552 mpa | Tiv thaiv cov hlau los ntawm kev nyuaj dhau / nkig. |
| Tensile lub zog (min) | 75,000 psi | 517 MPa | - |
| Hardness (Max) | - | 255 HB HRC 26 | Brinell lossis rockwell C ntsuas. Tseem ceeb rau Sulfide kev ntxhov siab tawg (SSC) tsis kam. |
Cov Lus Tseem Ceeb ntawm Hardness thiab H₂S kev pabcuam:
J55 muaj aQhov siab tshaj plaws hardness txwvCov. Qhov no ua rau nws ib qho ntawm ob peb tus API casing cov qib uas feem ntau suav tias yog siv tau rau hauvmob me(ib puag ncig muaj cov tshuaj sulfogen me me {{} h₂s) tsis muaj kev kho cua sov ntxiv, muab nws ua tau raws li qhov ua tau nyuaj. Rau qhov kev pab cuam loj dua, qib kawm li l80 lossis C90 feem ntau tau teev tseg.
Tshuaj lom neeg muaj pes tsawg leeg (ib txwm rau J55):
Thaum API 5ct tso cai rau qee qhov kev hloov pauv hauv kev siv hluav taws xob kom tau raws li cov khoom siv neeg kho tshuab, ib tus neeg cov yeeb nkab sib xyaw yuav zoo li no:
| Lub ntsiab | Cov ntau (%) |
|---|---|
| Carbon (c) | 0.34 - 0.39% |
| Manganese (mn) | 1.25 - 1.50% |
| Phosphorus (p) | Tsawg dua los yog sib npaug rau 0.030% |
| Sulphur (s) | Tsawg dua los yog sib npaug rau 0.030% |
| Silicon (si) | 0.20 - 0.35% |
3. Qhov tseem ceeb ntawm "Seamless"
Seamless steel yeeb nkab (sms):Cov yeeb nkab no yog tsim los ntawm tho ib lub nplua nuj ntawm cov hlau los tsim lub plhaub khoob, uas yog elongated thiab dov mus rau qhov uas yuav tsum tau thiab phab ntsa tuab. MuajTsis muaj Weld Seamraws nws qhov ntev.
Qhov zoo ntawm seamless rau J55:
Cov ris tsho sib luag:Muaj zog sib xws thiab cov phab ntsa tuab ib ncig ntawm txoj kev ncig.
Siab ncaj ncees:Feem ntau cov kev ntsuas siab siab dua vim tias tsis muaj kev xav tau welded, uas tuaj yeem yog qhov muaj feem muaj qhov tsis muaj zog.
Kev ntseeg tau:Xav txog cov ntawv thov tseem ceeb hauv cov roj thiab roj uas tsis ua haujlwm tsis yog ib qho kev xaiv.
Hauv kev sib piv,ERW (hluav taws xob tiv thaiv welded)Yeeb nkab yog tsim los ntawm ib lub phaj yob thiab muaj weld seam. Thaum feem ntau tsis kim dua, nws yog feem ntau siv rau cov ntawv thov tsawg dua.
4. Cov kev siv ntawm API 36 J55 Seamless Yeeb Nkab
J55 yog ib qho kev ua tau zoo heev, kev lag luam, thiab ntau qib tau siv rau:
Nto casing:Thawj txoj hlua ntawm casing hauv lub qhov dej, teeb tsa los ntawm cov chaw ntiav.
Nruab nrab casing:Cov hlua ntim hauv nruab nrab ntawm ib qho dej.
Ntiav los yog qis - siab} siab ntau yam chaw:Wells qhov twg lub reservoir siab tsis yog tshwj xeeb.
Dej ua dej thiab geothermal.
Cov ntawv thov txheej txheem:Qee lub sij hawm siv raws li piling lossis hauv lwm cov qauv txheej txheem sab nraum cov roj kev lag luam vim nws cov lus paub tshwj xeeb thiab muaj.
Lub ntsiab
IbAPI spec 5ct J55 Seamless Steel Yeeb NkabYog lub siab - Zoo, Weld - dawb yeeb chwv rau cov roj thiab roj zoo. Nws yog tus cwj pwm los ntawm aNruab Nrab Tawm Zog Zog (55,000 PSI)Thiab yog nrov, tus nqi {{{-} Xaiv cov hom ntau ntau yam, tshwj xeeb uas muaj zog lossis cov kev tiv thaiv muaj zog heev.
