Hauv kev lag luam roj thiab roj,casingthiabcevyog ob hom yeeb nkab steel (sib sau ua ke hu ua Roj Lub Tebchaws Tubular Khoom, lossis OCTG), tab sis lawv ua haujlwm sib txawv heev.
Txoj kev yooj yim tshaj plaws los xav txog nws yog:Casing yog cov txheej txheem phab ntsa ntawm lub qhov dej, hos tubing yog "straw" siv los nqus cov roj.
Tsis paub meej tias Qib twg lossis kev sib txuas haum rau koj qhov chaw nyob zoo?Nrog peb cov engineers rau kev pom zoo.
Lub Hom Phiaj
Casing:Nws txoj haujlwm yog los muab cov qauv kev ncaj ncees rau lub borehole. Nws tiv thaiv cov pob zeb nyob ib puag ncig thiab av los ntawm qhov tsua hauv, tiv thaiv cov dej hauv av los ntawm kev sib kis, thiab cais cov cheeb tsam sib txawv ntawm ib leeg.
Tubing:Nws txoj hauj lwm yog los ua tus kav dej los ntawm cov roj los yog cov pa roj los ntawm lub reservoir mus rau saum npoo. Nws yog cov yeeb nkab uas cov kua dej ntws los ntawm.
Installation thiab Permanence
Casing (Ntev):Thaum casing tau qis rau hauv qhov dej, nws feem ntau yogcemented nyob rau hauv qhov chaw. Nws yog ib feem mus tas li ntawm qhov dej thiab yuav luag tsis raug tshem tawm.
Tubing (tshem tawm):Tubing tsis yog cemented. Nws yog "dai" los ntawm lub taub dej thiab feem ntau kaw rau hauv qab nrog ib lub cuab yeej hu ua "packer." Vim tias nws tsis yog cemented, nws tuaj yeem rub tawm thiab hloov pauv yog tias nws dhau los ua corroded, ntsaws, lossis yog lub qhov dej xav tau "kev ua haujlwm" (kev tu).
Qhov Loj (Diameter)
Casing (loj):Txij li thaum nws kab lub borehole, casing muaj ib tug loj txoj kab uas hla. Txheem qhov ntau thiab tsawg los ntawm4-1/2 nti rau 20 nti(los yog ntau tshaj rau cov yeeb nkab).
Tubing (me me):Tubing haum rau hauv lub casing, yog li nws yog me dua. Standard qhov ntau thiab tsawg feem ntau yog los ntawm2-3/8 nti rau 4-1/2 nti.
Mechanical Requirements
Casing:Yuav tsum tau tsim kom tiv taus siabsab nraud siab(collapse) los ntawm cov pob zeb nyob ib puag ncig thiab qhov hnyav ntawm txoj hlua ntev ntev (nruj).
Tubing:Yuav tsum tau tsim los tiv taussab hauv siab(burst) los ntawm cov roj ntws / roj thiab yuav tsum tiv taus corrosion thiab hnav los ntawm cov kua txav.
Quantity nyob rau hauv ib lub qhov dej
Casing:Ib lub qhov tob tob yuav muaj ntau txheej txheej ntawm cov casing (xws li lub tsom iav raj) hu ua tus neeg xyuas pib, nto, nruab nrab, thiab cov casing.
Tubing:Feem ntau cov qhov dej muaj tsuas yog ib txoj hlua ntawm tubing hauv qhov kawg ntawm cov khoom tsim tawm.
Sib piv Summary Table
| Feature | Casing | Tubing |
| Lub luag haujlwm tseem ceeb | Kev txhawb nqa & kev tiv thaiv zoo | Production conduit (fluid flow) |
| Qhov chaw | Lines the borehole (sab nrauv) | Sab hauv casing (puab yeeb nkab) |
| Cemented? | Yog, feem ntau cemented rau pob zeb | Tsis yog, tshem tau |
| Kev ruaj khov | Mus tas li | Tshem tau / Hloov tau |
| Standard Sizes | Loj (4-1/2 "mus rau 20") | Me me (2-3/8 "mus rau 4-1/2") |
| Kev Nyuaj Siab | Collapse & Tension | Kev tawg & sab hauv Corrosion |
API 5CT Casing thiab Tubing Hoobkas
API 5CT Roj zoo casing yeeb nkab test equipments
FAQ
Cov khoom siv dab tsi yog siv rau cov kav dej?
Casing kav feem ntau yog ua los ntawmsiab -lub zog carbon lossis hlau alloy, tsim kom tau raws liAPI 5 CTspecifications.
Kev xaiv cov khoom tshwj xeeb yog nyob ntawm lub qhov dej xav tau:
Carbon Steel:Siv rau tus qauv, tsis yog - qhov dej corrosive (piv txwv li, Qib J55,K55).
Hlau alloy:Muaj cov khoom xws li Chromium, Molybdenum, lossis Manganese kom muaj zog dua (piv txwv li, Qib N80, P110).
Corrosion-Resistant Alloys (CRA):Siv rau "qaub" los yog corrosive zoo heev; cov no suav nrog stainless hlau, Chrome- hnyav alloys (13Cr), lossis Nickel-raws li alloys los tiv thaiv H2S thiab CO2 corrosion.
Qhov twg yog qhov muaj zog, cov yeeb nkab lossis cov kav dej?
Tsis yog ib txwm yog "muaj zog"; lawv yog tsim rautxawv lub hom phiajthiab lawv lub zog nyob ntawm tusqib steelthiabphab ntsa thicknessxaiv.
Casing Tube:Feem ntau muaj ibtxoj kab uas hla loj duathiabphab ntsa tuabvim nws txoj hauj lwm yog los txhawb nqa tag nrho cov qauv zoo thiab tiv thaiv lub zog sab nraud hauv av. Nyob rau hauv tas li ntawd, nws muaj zog "tag nrho" ntau dua.
Tubing:Muaj ibme txoj kab uas hlatab sis feem ntau yog ua los ntawm covtib qib siab -lub zog steelli casing (xws li P110). Nws lub zog yog tsom rau kev tiv thaiv siab hauv kev tsim khoom siab thiab qhov nro ntawm nws tus kheej qhov hnyav.
