C90 yog ib qho nruab nrab -rau- siab zog seamless steel yeeb nkab khoom raws li API 5CT tus qauv. Nws yog ib qho derivative ntawm P110 steel qib thiab yog tsim tshwj xeeb los tiv thaiv kev nyuaj geological tej yam kev mob thiab siab - siab ua hauj lwm tej yam kev mob. Los ntawm cov txheej txheem nruj alloy thiab cov txheej txheem kev kho cua sov, nws ua tiav qhov sib npaug ntawm lub zog thiab lub zog, ua rau nws tsim nyog rau cov xwm txheej uas yuav tsum tau nruj me ntsis rau cov yeeb nkab kev ua tau zoo, xws li sulfur- muaj cov roj thiab roj thiab qhov tob tob drilling.
tshuaj muaj pes tsawg leeg
| Tshuaj muaj pes tsawg leeg | Cov ntsiab lus ntau |
|---|---|
| C | Tsawg dua lossis sib npaug li 0.35% |
| Mn | Tsawg dua lossis sib npaug li 1.20% |
| P | Tsawg dua lossis sib npaug li 0.020% |
| S | Tsawg dua lossis sib npaug li 0.010% |
| Ni | Tsawg dua lossis sib npaug li 0.99% |
| Cr | Tsawg dua lossis sib npaug li 1.50% |
| Mo | 0.25 - 0.85% |
API 5CT Standard C90 Cov Khoom Siv Hluav Taws Xob Kev Ua Haujlwm thiab Kev Ntsuas
Raws li API SPEC 5CT 11th thiab cov ntaub ntawv ntsuas kev lag luam, cov khoom siv tshuab ntawm C90 yuav tsum ua tau raws li cov hauv qab no cov cim qhia:
Tensile Strength: Ntau dua los yog sib npaug ntawm 689 MPa (kwv yees li 100 ksi), kom ntseeg tau tias cov yeeb nkab tsis tawg nyob rau hauv siab - siab tensile loads.
Lub zog muaj zog: 621-724 MPa (kwv yees li 90-105 ksi), ua tau raws li kev sib tsoo thiab kev ua haujlwm siab sab hauv ntawm qhov sib sib zog nqus zoo casing.
Elongation: Ntau dua los yog sib npaug li 16% (gauge ntev 50mm), ua kom cov yeeb nkab yas deformation muaj peev xwm nyob rau hauv txoj kev nyuaj siab.
Hardness: Tsawg dua los yog sib npaug rau 255 HB (Britll hardness) los yog tsawg dua los yog sib npaug rau 25.4 HRC (Rockwell hardness), ntsuas qhov ua tau zoo thiab hnav tsis kam.
API 5CT Standard C90 Casing Application Areas thiab Case Studies
Roj thiab roj Extraction
Sib sib zog nqus thiab Ultra-Deep Wells: C90 casing tuaj yeem tiv thaiv kev tsim siab ntawm qhov tob tshaj 7000 meters. Piv txwv li, Middle Eastern roj teb tau ua tiav siv C90 casing hauv 7500-meter ultra- qhov tob tob, tiv thaiv qhov kub siab - kub (150 degree) thiab high-pressure (120 MPa) ib puag ncig.
Sulfur- Cov Kabmob Roj thiab Roj: Nws cov chromium thiab molybdenum alloy muaj pes tsawg leeg tiv taus hydrogen sulfide corrosion. Piv txwv li, ib tug sulfur - bearing gas teb nyob rau hauv North Hiav txwv siv C90 tubing, ncua nws cov kev pab cuam lub neej los ntawm peb lub sij hawm piv rau cov qib steel zoo tib yam.
Marine Engineering
Sib sib zog nqus-Hiav txwv Platforms: C90 seamless steel kav yog siv nyob rau hauv subsea oil pipelines, tuav ruaj khov kev ua tau zoo txawm nyob rau hauv seawater ib puag ncig txias li -20℃. Piv txwv li, C90 pipeline nyob rau hauv ib tug Brazilian sib sib zog nqus dej hiav txwv teb tau ua hauj lwm yam xyuam xim rau 10 xyoo.
High -siab xa system
Shale gas fracturing: C90 tubing tuaj yeem tiv taus cov kua dej tawg ntau dua 100 MPa. Ib txoj haujlwm shale roj hauv Tebchaws Meskas tau siv C90 tubing, ua rau 20% nce hauv ib qho - zoo ntau lawm.
