Txheej txheem cej luam
C95yog qib ntawm seamless steel yeeb nkab txhais los ntawm covAPI Specification 5CT(American Petroleum Institute), uas tswj cov casing thiab tubing rau roj thiab roj qhov dej.
Lub "C" sawv rauCasing. Cov kav dej yog qhov loj - txoj kab uas hla uas tau muab tso rau hauv cov roj los yog roj av thiab cemented rau hauv qhov chaw. Lawv lub luag haujlwm tseem ceeb yog:
Tiv thaiv lub qhov dej kom tsis txhob tawg.
Cais cov cheeb tsam hauv av sib txawv kom tsis txhob muaj dej nkag mus.
Muab ib lub raj rau kev rho tawm cov roj thiab roj.
Tus naj npawb "95" yog hais txog nwsyam tsawg kawg nkaus yield zogntawm95,000 psi(655 MPa).
Cov ntsiab lus tseem ceeb (API 5CT)
| Feature | Specification |
|---|---|
| Txuj | API 5CT (Liab tsab yog 9th, tab sis C95 yog los ntawm cov ntawv ua ntej) |
| Hom | Seamless Casing Pipe |
| Qib | C95 |
| Yam tsawg kawg Yield Strength | 95,000 psi (655 MPa) |
| Yam tsawg kawg Tensile Strength | 105,000 psi (724 MPa) |
| Kev txwv tsis pub muaj kev phom sij | Tsis pom zoo rau kev pabcuam qaub(ib puag ncig uas muaj H₂S). |
Cov ntsiab lus tseem ceeb: C95 vs. L80 thiab Lwm Qib
Qhov no yog ib qho tseem ceeb ntawm kev nkag siab.C95 yog qib tsis siv nyob rau hauv API 5CT specifications tam sim no.
Qib keeb kwm:C95 yog ib feem ntawm cov laus versions ntawm API 5CT. Nws yog qib siab -lub zog tab sis tsis muaj kev tswj hwm nruj ntawm nws cov hardness thiab microstructure, ua rau nws raug rauSulfide Stress Cracking (SSC)hauv kev pabcuam qaub.
Hloov los ntawm L80:Vim nws qhov kev ua haujlwm tsis zoo hauv H₂S ib puag ncig, C95 tau hloov pauv tau zooL80qib.
L80muaj covtib yam tsawg kawg nkaus yield zog(80,000 psi) tab sis nrog lub zog siab tshaj plaws, lub zog tensile, thiab, qhov tseem ceeb tshaj,Maximum hardness txwv(HRC 23). Qhov kev tswj hardness no ua rau L80 Hom 1 tus qauv xaiv raukev pabcuam qaubdaim ntawv thov.
Vim li cas C95 tseem siv tau:Tej zaum koj tseem yuav pom nws nyob rau hauv cov qauv tsim cov dej qub qub, cov khoom qub qub, lossis hauv cov ntawv tshwj xeeb uas tsis yog - qaub qhov twg nws lub zog siab dua (piv rau L80) tau txais txiaj ntsig. Txawm li cas los xij, rau ib txoj haujlwm tshiab ua raws li cov qauv niaj hnub no, L80 lossis lwm yam SSC - cov qib tiv taus zoo li C110 lossis T95 yuav raug teev tseg.
Hom tshuaj muaj pes tsawg leeg
Thaum API 5CT tsom rau cov khoom siv kho tshuab ntau dua li cov qauv tshuaj nruj, C95 feem ntau yogchromium-molybdenum (Cr-Mo) hlau. Ib tug neeg sawv cev muaj pes tsawg leeg yog:
| Lub ntsiab | Cov ntsiab lus (%) |
|---|---|
| Cov pa roj carbon (C) | 0.20 - 0.35 |
| 0.75 - 1.50 | |
| Chromium (Cr) | 0.80 - 1.50 |
| Molybdenum (hli) | 0.15 - 0.35 |
| Silicon (Si) | 0.15 - 0.50 |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.030 |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.030 |
No Cr-Mo muaj pes tsawg leeg muab qhov tsim nyog lub zog thiab toughness los ntawm kev kho cua sov (quenching thiab tempering).
Daim ntawv thov
C95 seamless kav feem ntau yog siv los uaroj av casinghauv:
Qhov dej tobyuav tsum muaj kev sib tsoo thiab tawg tsis kam.
Siab - qhov dej siabqhov twg lub zog tawm los ntau dua (95,000 psi) yog qhov tsim nyog.
Nyob ruaj khov, qab zib (tsis yog- qaub) ib puag ncigtsis muaj kev pheej hmoo ntawm H₂S raug.
Summary : Tseem Tos Koj
API C95 yog Seamless Casing Pipe Qib:Nws tau txhais los ntawm nws 95,000 psi yam tsawg kawg nkaus yield zog.
Feem ntau Obsolete:Nws tau raug hloov dua tshiab hauv API 5CT cov qauv niaj hnub los ntawm cov qib nrog zoo dua -cov khoom tswj, feem ntauL80.
Kev txwv tseem ceeb: Tsis haum rau kev pabcuam qaub(H₂S ib puag ncig) vim nws qhov cuam tshuam rau sulfide kev nyuaj siab tawg.
High-Lwm txoj kev muaj zog:Nyob rau hauv nws lub sij hawm, nws ua hauj lwm raws li ib tug siab - lub zog lwm txoj rau kev thov, tab sis tsis yog - qaub, zoo tej yam kev mob.
Modern Equivalents:Rau cov kev xav tau zoo sib xws niaj hnub no, engineers yuav saib cov qib zoo liL80(rau kev pabcuam qaub) lossisC110 / T95(uas muaj cov kev cai SSC nruj).
Yog tias koj tab tom ua haujlwm ntawm qhov project uas qhia txog C95, nws raug nquahu kom sab laj qhov tseebAPI 5 CTtus qauv thiab paub meej nrog cov ntaub ntawv engineers kom ntseeg tau tias cov qib uas tau xaiv yog haum -rau- lub hom phiaj, tshwj xeeb tshaj yog hais txog kev pheej hmoo ntawm ib puag ncig.
