API 5CT L80NQ BTC Casing
API 5CT L80NQ BTC Casingyog lub siab -kev ua haujlwm oilfield casing txhim kho los ntawm cov txheej txheem kho cua sov tshwj xeeb. Hauv kev lag luam roj av, nws raug suav hais tias yog "kho kom zoo dua" version ntawm tus qauv L80 qib, tshwj xeeb yog tsim los rau cov txheej txheem zoo uas xav tau cov txheej txheem microstructure zoo dua thiab qis -kub toughness.
Hauv API 5CT tus qauv, L80 feem ntau categorized li L80-1,L80-9Cr, los yog L80-13Cr.NQtsis yog API cov lus kawg tab sis tau lees paub dav davmanufacturing txheej txheem identifierhauv kev lag luam:
N (Normalizing):Cov yeeb nkab steel yog cua sov rau thaj tsam austenitic (kwv yees . 850℃-920℃) thiab tom qab ntawd cua- txias. Lub hom phiaj yog musrefine lub grain lojthiab tshem tawm qhov tsis xws luag hauv thawj microstructure.
Q (Quenching):Cov yeeb nkab tau rov ua dua thiab tom qab ntawd txias sai sai (dej lossis roj) los ua martensite.
T (Tempering):Cov yeeb nkab yog tempered ntawm qhov kub tsis qis dua 565℃(1050℃F).
Qhov txawv ntawm Standard L80:Thaum tus qauv L80 tsuas yog xav tauQuenching + Tempering (Q + T), L80NQ ntxiv covnormalizingkauj ruam. Qhov no ua tiav qhov kev sib sib zog nqus ntawm cov nplej loj, ua rau muaj qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom.
Tshuaj muaj pes tsawg leeg
Txhawm rau ua kom tiav NQ kev kho cua sov thiab ua kom muaj zog tiv thaiv Hydrogen Sulfide (H2S), L80NQ nta meej tswj cov kab hauv qab:
Cov pa roj carbon (C):0.24% - 0.28% (kom qis los txhim kho toughness thiab weldability).
Chromium (Cr) & Molybdenum (Mo):0.50% - 1.00% (kom txhim kho hardenability thiab tempering stability).
Phosphorus (P) & Sulfur (S):Tsawg dua lossis sib npaug li 0.015% (P) / Tsawg dua lossis sib npaug li 0.005% (S) (Ultra{0}}tsawg sulfurtiv thaiv tsis yog -cov hlau sib xyaw thiab Hydrogen Induced Cracking/HIC).
Grain Refiners (V / Nb / Ti):Ntxiv nyob rau hauv cov lej kom paub meej aGrain Size ntawm 8 los yog finer(ASTM E112)
Mechanical Properties
| Parameter | Technical Indicator (L80NQ yam) | API 5CT Requirement (L80) |
| Yield zog | 580 - 640 MPa(84 - 93 ksi) | 552 - 655 MPa (80 - 95 ksi) |
| Tensile zog | Ntau dua lossis sib npaug li 670 MPa(97 hli) | Ntau dua lossis sib npaug rau 655 MPa (95 ksi) |
| Hardness (Rockwell) | 19 - 21 HRC | Tsawg dua lossis sib npaug li 23 HRC(Strict sab sauv txwv) |
| Hardness Uniformity | Tsawg dua lossis sib npaug li 2.0 HRC(Ntawm hla-section) | Tsis tau teev tseg (tsuas yog sab sauv txwv) |
| Impact Zog (CVN @ -10 degree) | Transverse Ntau dua los yog sib npaug rau 45 J / Longitudinal Ntau dua lossis sib npaug li 80 J | Raws li qhov loj me (feem ntau ntau dua lossis sib npaug rau 27 J) |
API 5CT L80 Casing Size Chart
| Sab nraud | Phab ntsa Thickness | Qhov hnyav | Qib | Xov | Ntev | |
| hauv | mm | kg/m | lb/ft | |||
| 4 1/2″ | 114.3 | 14.14-22.47 | 9.50-11.50 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 5″ | 127 | 17.11-35.86 | 11.50-24.10 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 5 1/2″ | 139.7 | 20.83-34.23 | 14.00-23.00 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 6 5/8″ | 168.28 | 29.76-35.72 | 20.00-24.00 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 7″ | 177.8 | 25.30-56.55 | 17.00-38.00 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 7 5/8″ | 193.68 | 35.72-63.69 | 24.00-42.80 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 8 5/8″ | 219.08 | 35.72-72.92 | 24.00-49.00 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 9 5/8″ | 244.48 | 48.07-86.91 | 32.30-58.40 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 10 3/4″ | 273.05 | 48.73-97.77 | 32.75-65.70 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 11 3/4″ | 298.45 | 62.50-89.29 | 42.00-60.00 | L80 | LTC/STC/BTC | R1/R2/R3 |
| 13 3/8″ | 339.72 | 71.43-107.15 | 48.00-72.00 | L80 | LTC/STC/BTC | R1/R2/R3 |
API 5CT L80NQ BTC OCTG Dimensional Tolerances
Cov kev tolerances no ua kom ntseeg tau tias L80NQ casing tuaj yeem txuas nrog kev nyab xeeb thiab tiv taus qhov siab downhole.
| Cov khoom soj ntsuam | Tolerance Range |
| Sab nraud txoj kab uas hla (OD) | OD <4-1/2":± 0.79 hli (± 0.031 ") OD Ntau dua lossis sib npaug rau 4-1/2 ":-0.50% rau +1.00% |
| Phab ntsa Thickness (WT) | -12.5%(Sab saum toj txwv yog tswj hwm los ntawm qhov hnyav siab) |
| Qhov hnyav (Ib leeg sib koom) | -3.5% rau +6.5% |
| Qhov hnyav (Carload) | -1.75% |
| Lub cev ncaj | Deviation yuav tsum tsis txhob tshaj0.2%ntawm tag nrho qhov ntev |
| Kev Ncaj Ncees | DeviationTsawg dua los yog sib npaug li 3.2mm (1/8 ")hauv 1.5m (5ft) ntawm cov yeeb nkab kawg |
| Ovality | Muaj nyob rau hauv OD kam rau ua |
API 5CT L80NQ BTC Casing Pipe Length Range
Raws li API 5CT, casing yog muab rau hauv peb qhov ntev ntev:
| Ntev Ntau | Qhov siab (m) | Taw (ft) |
| Ntau yam 1 (R1) | 4.88 – 7.62 | 16.0 – 25.0 |
| Ntau yam 2 (R2) | 7.62 – 10.36 | 25.0 – 34.0 |
| Ntau yam 3 (R3) | 10.36 – 14.63 | 34.0 – 48.0 |
| Nco tseg:Ntau yam 2yog qhov ntev tshaj plaws siv rau kev ua haujlwm oilfield. |
BTC (Buttress Thread Connection) Cov yam ntxwv
Kev sib txuas BTC siv rau L80NQ muaj cov hauv qab no cov khoom siv zoo:
Xov Profile:3℃load lub ntsej muag lub kaum ntse ntse, 10℃stab lub ntsej muag lub kaum ntse ntse, 5 threads ib nti (TPI).
Joint Efficiency:Mus txog90% - 100%ntawm cov yeeb nkab lub cev muaj zog.
Compressive Performance:Vim lub trapezoidal tsim, BTC muaj kev tiv thaiv zoo heev rau axial compression, ua rau nws zoo tagnrho rau cov qhov dej sib sib zog nqus ntsug thiab txuas ntxiv - mus txog qhov dej.
API 5CT L80NQ BTC Petroleum Casing Pipe Tsis yog -Kev Ntsuam Xyuas Kev Puas Tsuaj (NDT) & Kev Tswj Xyuas Zoo
L80NQ casing feem ntau raug kuaj nruj dua li cov qib txheem (feem ntau ntsib PSL-2 lossis siab dua):
Full -Kev Ntsuas Lub Cev Ultrasonic (UT):100% kev pab them nqi rau longitudinal/transverse flaws thiab phab ntsa thickness ntsuas.
Hardness Stratification Test:Cov qauv raug coj los ntawm cov yeeb nkab kawg rau 9-point lossis 12-point hardness daim ntawv qhia (sab hauv, nruab nrab, thiab sab nrauv phab ntsa) kom tsis txhob muaj qhov chaw nyuaj.
Drift Test:Xyuas kom meej tias cov cuab yeej downhole tuaj yeem dhau los ntawm cov yeeb nkab yam tsis muaj kev cuam tshuam.
Fluorescent Magnetic Particle Inspection (MPI):Tshwj xeeb yog tsom rau cov yeeb nkab kawg thiab cov xov chaw kom ntseeg tau tias xoom micro- tawg.
GNEE API 5CT L80NQ BTC Casing txheej txheem kab
GNEE API 5CT L80NQ BTC Oil Well Drilling Casing Pipe Test equipments
GNEE API 5CT L80NQ BTC Oilfield Casing Certificate
FAQ
Qhov txawv ntawm L80 yog dab tsi?
Muaj 3 yam tseem ceeb ntawm L80. Lawv txhua tus muaj lub zog tib yam (80,000 psi) tab sis txawvcorrosion kuj:
L80-1 (Standard):
Qhov zoo tshaj plaws rau:Kev Pab Cuam (H2S ).
Nws yog cov qauv carbon steel nrog nruj hardness txwv kom tsis txhob tawg. Feem ntau thiab pheej yig tshaj.
L80-9Cr (9% Chrome):
Qhov zoo tshaj plaws rau:Nruab nrabCO2 corrosion.
Muaj 9% Chromium rau kev tiv thaiv zoo dua li cov qauv hlau.
L80-13Cr (13% Chrome):
Qhov zoo tshaj plaws rau:SiabCO2 corrosion.
Cov hlau tsis muaj hlau siv rau hauv qhov hnyav heev, siab -kub roj qhov dej. kim tshaj plaws.
Qhov txawv ntawm L80 thiab N80 casing yog dab tsi?
Thawj qhov txawv yog qhov ntawdL80 yog tsim los rau kev pabcuam qaub (H2Sib puag ncig), thaumN80 yog siv rau cov qauv (qab zib) qhov dej. Txawm hais tias lawv sib koom tib lub zog tensile, lawv cov khoom siv tshuaj thiab lub cev yog nruj tswj hwm qhov sib txawv.
| Feature | L80 Cas | N80 Cas |
| Max Hardness | 23 HRC (Strict Limit) | Tsis txwv |
| Ib puag ncig | Kev Pab Cuam (H2S) | Sweet Service (Standard) |
| Kev kho cua sov | Quenched & Tempered (Q + T) | Normalized los yog Q + T |
| Nqi | Ntau dua | Ntxiv Economical |
| Hloov pauv tau | Yuav hloov N80 | Tsis tuaj yeem hloov L80 |
Qhov luaj li cas casing kuv yuav tsum siv?
Xaiv qhov loj casing yog nyob ntawm kojzoo tsim, uas yog xam los ntawm "sab hauv tawm." Koj pib nrog koj lub hom phiaj tsim khoom (tubing) thiab ua haujlwm rov qab mus rau qhov chaw.
Rau qhov dej ntiav / Yooj Yim:4-1/2 "los yog 5-1/2" ntau lawm casing feem ntau txaus.
Rau Deep / Complex Wells:Pib nrog 7 "lossis 9-5/8" txoj hlua ntau lawm kom tso cai rau ntau theem nruab nrab.
Nrog koj tus Drilling Engineer:Casing loj yog qhov kawg txiav txim siab los ntawm geological siab thiab qhov loj ntawm cov cuab yeej xav tau kom ncav cuag lub hom phiaj qhov tob.
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