Xaiv txoj caiAPI 5CT Casingyog qhov kev txiav txim siab tseem ceeb uas cuam tshuam txog kev nyab xeeb, kev ua neej nyob, thiab tus nqi -kev ua tau zoo ntawm lub qhov dej roj. Ib qho yuam kev hauv kev xaiv cov khoom tuaj yeem ua rau muaj kev puas tsuaj loj xws li kev tawg, cov kav dej sib tsoo, lossis ib puag ncig xau.
Txheeb xyuas qib Steel (Lub zog & Ib puag ncig)
API 5CT qib tau muab cais raws li lawv cov khoom muaj zog thiab ua haujlwm rau cov tshuaj corrosive.
Rau ntiav, qis -Pressure Wells:SivJ55los yogK55. Cov no yog cov qib "standard" uas pheej yig tshaj plaws.
Rau qhov tob, siab -Pressure Wells:SivP110los yogQ125. Cov qib siab - cov qib muaj zog no tuaj yeem txhawb nqa qhov hnyav hnyav ntawm cov hlua ntev ntev thiab tiv taus qhov kev tsim siab.
Rau Sour Service (H2S Environments):SivL80, C90, lossis T95. Cov no muaj kev tswj hardness (piv txwv li, L80 yog max 23 HRC) los tiv thaivSulfide Stress Cracking (SSC). Ceeb toom: Tsis txhob siv tus qauv P110 hauv qhov dej qaub.
Rau CO2Corrosion:SivL80-13Cr. Cov ntsiab lus chromium siab tiv thaiv "pitting" corrosion tshwm sim los ntawm carbon dioxide.
Txiav txim siab sab nraud (OD) & Phab ntsa Thickness
Casing tsim ua raws li "teescoping" mus kom ze (loj nyob rau sab saum toj, me dua hauv qab).
Loj (OD):Qhov ntau thiab tsawg yog los ntawm4-1/2 "mus rau 20". Koj qhov kev xaiv nyob ntawm qhov luaj li cas drilled thiab qhov loj ntawm cov cuab yeej (ntsis / tubing) uas yuav tsum dhau los ntawm nws tom qab.
Qhov hnyav (Wall Thickness):Qhov hnyav dua (lb / ft) muaj cov phab ntsa tuab. Koj xav tau cov yeeb nkab hnyav dua rau:
High Collapse Pressure:Yog hais tias lub ntiaj teb / ntsev txheej yog squeezing cov yeeb nkab.
High Burst Pressure:Yog hais tias lub internal gas / roj siab siab heev.
Xaiv Txoj Cai Kev Sib Txuas (Tshooj Hom)
Kev sib txuas feem ntau yog "qhov txuas tsis muaj zog tshaj" hauv qhov dej. Koj yuav tsum phim qhov kev sib txuas rau lub qhov dej ntawm cov neeg kho tshuab xav tau.
API LTC (Long Round):Tus qauv rau ntsug roj qhov dej. Nws muab cov kua sealing zoo thiab muaj zog me ntsis.
API BTC (Buttress):Siv qhov no rauhnyav casing hlualos yog qhov dej tob. Cov xov trapezoidal muab lub zog tensile zoo heev los tiv thaiv cov yeeb nkab los ntawm rub tawm.
Kev sib txuas hwm hwm:Yog tias koj tab tom drilling aSiab -Pressure Gas Welllossis kab rov tav qhov dej, API threads tsis txaus. Koj xav tau cov xov hwm hwm (piv txwv li, VAM® lossis TenarisHydril) uas muajhlau-rau- hlau gas- nruj seal.
Xyuas qhov Drift Diameter
CovDrift Diameteryog qhov guaranteed internal clearance ntawm cov yeeb nkab.
Kauj ruam tseem ceeb:Koj yuav tsum xyuas kom meej tias "Drift" ntawm koj lub casing loj dua qhov "Sab nraum txoj kab uas hla" ntawm qhov xyaum tom ntej los yog cov tubing ntau lawm uas koj npaj yuav nruab tom qab. Yog tias koj yuav hnyav- phab ntsa casing yam tsis tau kuaj xyuas qhov drift, koj cov cuab yeej yuav daig.
Xaiv qhov Length Range & PSL Level
Ntev (Range 2 vs. Range 3): Qhov siab 2 (25-34 ft)yog tus qauv thoob ntiaj teb.Qhov siab 3 (34-48 ft)yog siv rau hauv qhov dej tob los yog ntug dej hiav txwv kom txo cov kev sib txuas thiab txuag lub sijhawm, tab sis xyuas seb koj lub rig puas tuaj yeem tswj qhov siab ntxiv.
Zoo (PSL-1 vs. PSL-2):Rau cov ntug dej hiav txwv, siab - siab, lossis qhov dej tseem ceeb, ib txwm thovPSL-2. Nws yuav tsum muaj kev tiv thaiv tshuaj lom neeg nruj dua thiab yuav tsum tau kuaj qhov cuam tshuam (Charpy V-notch) piv rau qhov pib PSL-1.
GNEE API Casing Pipe txheej txheem kab
GNEE OCTG Casing Pipe test equipments
GNEE Oil Well Casing daim ntawv pov thawj
FAQ
Yuav ua li cas los txiav txim qhov loj casing?
Kev txiav txim siab qhov loj me yog a"hauv qab-to-top" telescoping tsimtxheej txheem. Engineers ua raws cov kauj ruam tseem ceeb no:
Pib nrog Lub Hom Phiaj Kawg:Qhov loj ntawm koj cov cuab yeej tsim khoom kawg (xws li tubing lossis twj) dictates txoj kab uas hla ntawm cov yeeb nkab innermost (Production Casing).
Account rau Clearance:Txhua txoj hlua casing sab nrauv yuav tsum yog qhov loj txaus kom tso cai rau cov tho qhov txuas ntxiv kom dhau los ntawm nws sab hauv thaum tawm hauv qhov chaw txaus (annulus) sab nraud raucementing.
Ua haujlwm Upward:Koj xam tawm sab nraud los txiav txim qhov loj ntawm cov hlua loj dua. Ib qho kev vam meej yog:5-1/2"(Production) →9-5/8"(Intermediate) →13-3/8"(Nto).
Xav txog Geology:Cov qhov dej tob tob lossis cov uas muaj siab -siab "qhov teeb meem" yuav tsum tau ntxiv cov hlua nruab nrab, uas ua rau qhov pib qhov chaw ua haujlwm kom loj dua (piv txwv li, pib nrog20").
Qhov ntau ntawm API 5CT yog dab tsi?
Hauv API 5CT, lo lus "Ntau yam" tshwj xeeb yog hais txog covntevntawm ib qho kev sib txuas ntawm lub cev. Muaj peb tus qauv ntev ntau yam:
Ntau yam 1:16.0 – 25.0 ft (4.88 – 7.62 m) - Luv.
Ntau yam 2:25.0 – 34.0 ft (7.62 – 10.36 m) -Kev lag luam Standard / Feem ntau.
Ntau yam 3:34.0 – 48.0 ft (10.36 – 14.63 m) - Siv rau qhov dej tob lossis ntug dej hiav txwv.
