API 5CT K55 Casing Pipes

Khoom Taw Qhia

API 5CT K55 yog anruab nrab - carbon steel tsawgqib roj thiab roj casing/tubing tau teev tseg los ntawm American Petroleum Institute (API) 5CT tus qauv. Nws muaj qhov tsawg kawg nkaus yield zog ntawm379 MPa (55 ksi)thiab qhov tsawg kawg nkaus tensile lub zog ntawm655 MPa ua. Nws ua rau normalizing lossis normalizing thiab tempering kev kho mob, nrog nruj impurity tswj tshaj J55, ua rau superior toughness thiab stability. Feem ntau siv nyob rau hauv qhov ntiav mus rau nruab nrab - qhov tob qhov tob thiab cov txheej txheem txheej txheem, nws txhawb nqa lub qhov dej, cais thaj chaw siab, thiab tiv thaiv kev tawg. Haum rau cov tsis yog -acidic, nruab nrab sab hauv siab, thiab sab nraud extrusion tej yam kev mob, nws feem ntau tuaj nyob rau hauv diameters ntawm 4½ "-20". luv round, ntev round, los yog trapezoidal threads muaj, muab tus nqi siab -effectiveness thiab dav applicability.

API 5CT K55 casing yeeb nkab Specifications

Cov cuab yeej tseem ceeb ntawm API 5CT K55 Casing Pipes

k55 ua anruab nrab - zogcarbon steel qib nyob rau hauv API 5CT nrog ib tug yield zog ntau yam ntawm379-552 MPathiab qhov tsawg kawg nkaus tensile lub zog ntawmNtau dua lossis sib npaug li 655 MPa- tshwj xeeb tshaj yog siab dua J55 (Ntau dua lossis sib npaug rau 517 MPa), ua rau K55 hloov kho ncaj qha. Ob qib sib piv tib yam chemistry (P, S Tsawg dua lossis sib npaug li 0.030%), tab sis K55 muab qhov kev ua tau zoo dua tensile, tso cai rau nws los hloov J55 (tsis ua lwm yam). elongation thiab tej yam toughness yuav tsum tau piv rau J55, tab sis K55 elongation yog me ntsis qis. Hardness yog tswj raws li API 5CT txwv. Qhov sib npaug sib xyaw ua ke ntawm lub zog, tawv, thiab tus nqi ua rau K55 yog ib qho ntawm cov qib siv ntau tshaj plaws thoob ntiaj teb rau qhov dej ntiav mus rau nruab nrab - qhov tob ntawm cov roj thiab roj qhov dej.

API 5CT K55 OCTG casingYuav tsum tau xeem

Tag nrho K55 casing yuav tsum dhauKev sim hydrostatic, kev sim flattening, tensile test, hardness test (ASTM E18 / E10), thiab SSC xeemRaws li API 5CT. RauPSL-1, cov no yog qhov yuav tsum tau ua yam tsis muaj kev cuam tshuam lossis NDT lub luag haujlwm. RauPSL-2, yuav tsum tau kuaj ntxiv:Charpy impact test ntawm 21℃(70℃F)nrog yam tsawg kawg nkaus 20J (27J rau tag nrho- qhov loj me),NDT kev tshuaj xyuas rau Qib L4(ntawm UT, MFL, ECT, lossis MPI) rau qhov tsis zoo ntawm qhov ntev ntawm ob sab hauv thiab sab nrauv,puv - ntev phab ntsa thickness ntsuas (25% kev pab them nqi tsawg kawg nkaus), thiabKev txiav txim siab loj (ASTM E112). K55 belongs rau Pawg 1, yog li cuam tshuam qhov ntsuas kub yog 21℃(tsis yog 0℃zoo li lwm pab pawg). Kev tshuaj xyuas tshuaj (P, S Tsawg dua lossis sib npaug rau 0.030%) kuj tseem yuav tsum tau ua rau txhua qib PSL.

API 5CT K55 roj zoo Casing steel yeeb nkab Daim ntawv thov

API 5CT K55 OCTG Casing Applications:

K55 casing feem ntau yog siv hauvntiav mus rau nruab nrab - qhov tob tobnrog rau cov neeg siv khoom nruab nrab xav tau, suav nrog cov pa roj thiab roj qhov dej, coalbed methane qhov dej, qhov dej kub hauv qab, thiab cov dej hauv dej. Nws yog qhov mus - rau qib rautsis yog- qaub (tsis yog-H₂S) ib puag ncigqhov twg tus nqi-kev ua tau zoo yog qhov tseem ceeb, muab lub zog tensile siab dua (Ntau dua lossis sib npaug ntawm 655 MPa) dua li J55, ua rau nws tsim nyog rau cov qhov dej uas xav tau ntau dua cov qauv kev ruaj ntseg thiab kev sib tsoo. K55 tau siv dav hauvonshore drilling kev ua haujlwm(uas suav txog 80% ntawm lub ntiaj teb OCTG xav tau) thiab tseem siv rau hauv chav txhaj tshuaj thiab cov dej txhaj tshuaj. Txawm li cas los xij, nws yogtsis pom zoo rau kev pabcuam qaub lossis H₂S- muaj ib puag ncig- rau cov, N80Q lossis qib siab dua yuav tsum tau siv los hloov.

API 5CT K55 casing yeeb nkab ntawv pov thawj

API 5CT K55 OCTG casing txheej txheem kab

FAQ

1.Dab tsi yog qhov txawv ntawm K55 thiab J55?
Tib chemistry thiab yield zog, tab sisK55 muaj zog tensile ntau dua (Ntau dua lossis sib npaug ntawm 655 vs Ntau dua lossis sib npaug rau 552 MPa)thiab yuav tsum tau kev kho cua sov (normalizing), muab cov khoom zoo sib xws.K55 tuaj yeem hloov J55, tab sis tsis hloov pauv.

2.Qhov yuav tsum tau ntim khoom yog dab tsi?

Hlau hlua +xov protectors ntawm txhua qhov txuas. Cov xov yuav tsum du, tsis muaj burrs, tawg, los yog puas. Deg tsis xws luag (folds, seams, tawg) yuav tsum tau muab tshem tawm mus rau ib tug tob tsis tshaj12.5% ​​ntawm nominal phab ntsa thickness.

3.Vim li cas K55 thiaj li nrov tsawg dua piv rau L80/N80Q?

Tsis muaj kev pabcuam qaub- raws li ntau qhov dej ntsib H₂S, K55 tau raug txiav tawm kom pom zoo N80Q/L80.

Tsawg tawm los zog(max 552 MPa) vs L80 (min 552 MPa) - L80 muab tib yam tsawg kawg nkaus tawm los tab sis nrog ntau dua tensile thiab zoo dua toughness.

Tus nqi sib txawv yog shrinking- tus nqi sib txawv ntawm K55 thiab L80 tau nqaim mus rau ~ $ 10–20 / ton, ua rau kev txhim kho kev lag luam.

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