API 5CT K55 STC Casing
API 5CT K55 STC (Short Thread Coupled) casingyog ib qho ntawm cov khoom siv tubular tshaj plaws hauv kev lag luam roj thiab roj, muab faib ua pawg 1 steel qib raws li API Spec 5CT tus qauv. K55 muaj npe nrov rau nws tus nqi siab -kev ua tau zoo, lub zog tensile zoo dua li ntawmJ55, thiab nws qhov tsim nyog rau kev tsim khoom hauv nruab nrab - mus rau - qhov tob tob roj thiab roj qhov dej.
API 5 CT: Lub koom haum American Petroleum tus txheej txheem tswj xyuas cov casing thiab tubing.
K55 Steel Qib: Muaj lub zog zoo ib yam li J55 (55,000 psi) tab sis nta lub zog tensile ntau dua (95,000 psi); tus cwj pwm no ua rau nws muaj txiaj ntsig zoo dua J55 hauv qhov dej sib sib zog nqus lossis cov txheej txheem geological nyuaj uas yuav tsum muaj cov tensile tseem ceeb.
STC (Short Thread Coupled): Ib hom kev sib txuas uas siv cov xov xwm luv luv. Nws muaj kev ua tau zoo sealing zoo thiab yooj yim ntawm kev tuav, ua rau nws haum rau ib puag ncig yam ntxwv los ntawm nruab nrab qhov tob thiab siab.
Pib koj qhov K55 STC Casing Project nrog tus neeg muab kev ntseeg siab
API 5 CTK55 STC casing yeeb nkabTshuaj muaj pes tsawg leeg
| Qib | C Tsawg dua lossis sib npaug | Si Less than los sib npaug | Mn Tsawg dua lossis sib npaug | P Tsawg dua los yog sib npaug | S Tsawg dua los yog sib npaug | Cr Tsawg dua lossis sib npaug | Ni tsawg dua los yog sib npaug | Cu Less tshaj los yog sib npaug | Mo Less tshaj los yog sib npaug | V Tsawg dua los yog sib npaug |
| API 5CT K55 | 0.34-0.39 | 0.20-0.35 | 1.25-1.50 | 0.020 | 0.015 | 0.15 | 0.20 | 0.20 | / | / |
API 5 CTK55 STC OCTGMechanical Property
| Qib Steel | Yield zog (Mpa) | Tensile zog (Mpa) | Tag nrho elongation nyob rau hauv load% |
| API 5CT K55 | 379-552 | Ntau dua lossis sib npaug rau 655 | 0.5 |
Daim ntawv loj thiab kam rau API 5CT K55 STC Roj zoo Casing
| Nominal OD (nti) | Phab ntsa Thickness (mm) | Theoretical Luj (lb/ft) | Txoj kab uas hla (mm) |
|---|---|---|---|
| 4-1/2" | 5.21 – 10.16 | 9.50 – 15.10 | 99.59 – 101.35 |
| 5-1/2" | 6.22 – 12.70 | 14.00 – 23.00 | 121.36 – 124.03 |
| 7" | 5.89 – 15.11 | 17.00 – 38.00 | 154.66 – 161.70 |
| 9-5/8" | 7.92 – 14.22 | 36.00 – 53.50 | 215.90 – 222.40 |
| 13-3/8" | 8.38 – 13.06 | 48.00 – 72.00 | 310.18 – 317.88 |
API 5CT Casing Tolerances
OD Tolerance:
D <4-1/2":± 0.79 hli
D Ntau dua lossis sib npaug rau 4-1/2 ":+1.00% / -0.50%
Phab ntsa Thickness: -12.5%(tsawg kawg tso cai nyob rau hauv kam rau ua)
Qhov hnyav: +6.5% / -3.5%rau ib leeg
Kev ncaj: Tag nrho qhov ntev curvature yuav tsum tsis txhob tshaj0.2%ntawm tag nrho qhov ntev
Kev tsim khoom & Kev kho cua sov
Hom kev tsim khoom
Seamless (SML): Ua los ntawm kev tho thiab dov; tsis muaj welds.
Electric Resistance Welded (ERW): Ua los ntawm siab - zaus vuam. Rau Qib K55, ERW weld seam yuav tsum tau kho cua sov.
Txoj kev kho cua sov
Raws li -Rolled: Qib K55 raug tso cai xa ncaj qha rau hauv qhov kub-rolled mob (tsis muaj kev kho cua sov ntxiv).
Normalizing: Ua kom sov siab tshaj qhov ntsuas kub thiab txias hauv huab cua kom ua kom zoo dua cov qauv nplej.
Kev ntxhov siab: Kev kho cua sov hauv cheeb tsam siv tshwj xeeb rau ERW weld seam.
Tsis yog -Kev Ntsuas Kev Ntsuas & Kev Ntsuas Physicochemical (Testing & Inspection)
Tsis yog -Kev Ntsuas Kev Puas Tsuaj (NDT)
API 5CT tau txiav txim siab tias casing yuav tsum tau soj ntsuam hauv qab no kom ntseeg tau tias cov yeeb nkab lub cev tsis muaj qhov tsis xws luag:
Hydrostatic Test: 100% kev ntsuas siab los xyuas kom meej tias tsis muaj qhov xau tshwm sim raws li qhov ntsuas siab.
Kev Ntsuas Ultrasonic (UT): Txheeb xyuas qhov tsis xws luag hauv cov yeeb nkab lub cev (tseem siv tau rau qib PSL2).
Magnetic Particle Inspection (MPI): Tshawb xyuas cov kab nrib pleb ntawm cov yeeb nkab kawg thiab ntawm qhov chaw.
Electromagnetic Testing (ET): Ua hauj lwm pab raws li ib tug pab txoj kev los xyuas cov longitudinal defects.
Charpy Impact Test
Qhov yuav tsum tau muaj: K55 raug cais raws li qib pib hauv API 5CT Pawg 1.
Kev Cai: Tshwj tsis yog tus neeg yuav khoom tau hais meej meej rau daim ntawv thov ntawm PSL2 lossis PSL3 cov qauv hauv daim ntawv cog lus, tus qauv K55 qib (PSL1) tsis tas yuav tsum muaj Charpy Impact Test. Yog tias siv cov qauv PSL2, cov kev xav tau tshwj xeeb absorbed zog (txiav txim siab los ntawm phab ntsa thickness) yuav tsum tau ua raws li 0 degree.
Siv cov khoom tshuaj ntsuam xyuas
Visual Inspection: Kev kuaj pom ntawm qhov chaw sab hauv thiab sab nraud ntawm cov yeeb nkab.
Dimension Check: Ntsuas ntawm sab nraud txoj kab uas hla, phab ntsa thickness, thiab ntev.
Drift Test: Kev txheeb xyuas siv lub ntsuas drift los xyuas kom meej tias cov cuab yeej downhole tuaj yeem hla tau zoo.
Kev Tshuaj Xyuas Xov Tooj: Kev tshuaj xyuas ntawm STC threads los xyuas cov xov profile, txhuas, taper, thiab standoff.
Daim ntawv thov rau API 5CT K55 STC
K55 suav hais tias yog qhov kev xaiv "kev lag luam" hauv kev lag luam roj; nws cov ntawv thov tshwj xeeb yog raws li hauv qab no:
- Plab mus rau nruab nrab- Qhov tob tob: Feem ntau yog siv rau cov kab casing los yog cov hlua nruab nrab ntawm qhov tob ntawm kwv yees li 2,000 txog 3,000 meters.
- Tsawg-Pressure Formations: Tsim nyog rau thaj chaw roj thiab roj uas muaj qhov tsim qis qis qis thiab tsis muaj kev ua haujlwm tectonic hnyav.
- Tsis yog- Ib puag ncig qaub: K55 tsis muaj kev tiv thaiv H2S corrosion (nws tsis yog leej faj- tiv taus); yog li ntawd, nws yog siv tshwj xeeb hauv cov uas tsis yog- cov roj qaub thiab roj qhov dej.
- Onshore Operations: Vim nws tsis tshua muaj nqi thiab txhim khu kev qha lub zog, nws yog cov feem ntau siv steel qib nyob rau hauv cov pa roj thiab roj ntau lawm.
- Coalbed Methane thiab Dej Qhov Dej: Nws kuj tseem siv dav hauv kev txhim kho ntawm coalbed methane teb thiab hauv qhov dej tob.
GNEE API 5CT K55 STC OCTG Yeeb Nkab Hoobkas khoom siv
GNEE API 5CT K55 STC Casing test equipments
GNEE API 5CT K55 STC Casing Certificate
FAQ
Puas yog K55 carbon steel?
Yog, K55 yog carbon hlau.
K55 steel yeeb nkab yog cais raws li carbon structural steel thiab feem ntau yog siv rau roj zoo drilling casing thiab tubing. Nws cov khoom muaj pes tsawg leeg ua raws li API 5CT tus qauv; nws muaj lub zog zoo heev thiab ua haujlwm tau zoo, feem ntau yog tsim los ua seamless yeeb nkab, thiab tsim nyog rau qhov chaw ib puag ncig uas muaj cov khoom nruab nrab.
Dab tsi yog stc hauv cov kav dej?
STC stands rau "Short Thread Connector"-tshwj xeeb, ib lub voj voog luv luv- xov txuas- thiab sawv cev rau ib hom kev sib txuas siv hauv API casing, feem ntau ua haujlwm hauv kev drilling thiab thauj cov roj thiab roj qhov dej.
Nws nta ib lub voj voog luv luv- xov tsim nrog 60℃xov profile kaum sab xis thiab taper ntawm 1:16. Kev sib khi yog ua tiav los ntawm kev sib cuag ntawm cov xov flanks, ua rau nws haum rau qhov dej ntiav lossis qis - mus rau - daim ntawv thov siab nruab nrab; Tsis tas li ntawd, nws yooj yim rau kev tsim khoom thiab muab cov nqi tsim khoom qis dua.
Dab tsi yog qhov txawv ntawm STC thiab LTC xov?
Thawj qhov sib txawv ntawm STC (Short Round Thread) thiab LTC (Long Round Thread) yog nyob rau hauv lawv cov xov ntev thiab kev sib txuas lub zog. STC threads luv dua thiab tsim nyog rau qhov dej ntiav lossis tsawg- qhov chaw muaj kev ntxhov siab, muab kev sib txuas lub zog ntawm kwv yees li 60% -80% ntawm cov yeeb nkab lub cev lub zog; LTC threads ntev dua, muab kev sib txuas zoo dua thiab kev sib khi zoo dua, ua rau lawv haum rau nruab nrab - mus rau - cov ntawv thov sib sib zog nqus uas muaj qhov nruab nrab axial loads.
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