Cov pa roj carbon steel OCTG cov kav dej yog cov khoom tseem ceeb hauv cov roj thiab roj drilling thiab cov tshuab tsim khoom. Tsim los tiv thaiv kev kub siab, kub siab, thiab corrosive downhole ib puag ncig, cov kav dej no yuav tsum ua raws li cov qauv nruj thiab cov qauv. Tsis zoo li cov pa roj carbon steel kav, OCTG cov khoom yuav tsum tau tswj metallurgy, kev tsim cov txheej txheem, kev kho cua sov siab, thiab cov txheej txheem tshuaj xyuas. Cov txheej txheem tsim khoom yog vim li no cov txheej txheem tsim kho tau zoo heev uas hloov cov hlau nyoos rau hauv siab -cov khoom siv tubular zoo tsim nyog rau kev xav tau zoo.
Raw Material Preparation thiab Steelmaking
Billet Production thiab Tshuaj Tswj
Cov txheej txheem tsim khoom pib nrog steelmaking, feem ntau los ntawm cov pa hluav taws xob yooj yim lossis hluav taws xob arc rauv txoj kev. High- cov pa roj carbon zoo yog tsim los nrog kev tswj hwm nruj ntawm cov tshuaj muaj pes tsawg leeg, suav nrog cov pa roj carbon, manganese, phosphorus, sulfur, thiab cov kab sib xyaw ua ke. Tsawg impurity theem yog qhov tseem ceeb vim hais tias kev sib koom ua ke lossis kev sib cais tuaj yeem cuam tshuam kev ncaj ncees ntawm cov neeg kho tshuab hauv kev ntxhov siab.
Thaum molten steel yog refined, nws yog cam khwb cia rau hauv billets siv nruam casting technology. Cov billets no ua cov khoom pib rau seamless OCTG kav. Homogeneous chemical tis thiab me me nyob rau hauv qhov tsis xws luag yog qhov tseem ceeb los xyuas kom meej cov yam ntxwv ntawm txhua yam khoom raws li cov yeeb nkab ntev.
Surface Inspection thiab Conditioning
Ua ntej tsim, billets tau soj ntsuam saum npoo los txheeb xyuas cov kab nrib pleb, laps, lossis kev suav nrog. Sib tsoo los yog scarfing tshem tawm qhov tsis xws luag. Qhov no thaum ntxov - tswj kev ua tau zoo theem txo qis qis qis qis thiab txhim kho kev ntseeg siab ntawm cov khoom hauv siab - kev pabcuam siab.
Txoj kev ua yeeb nkab
Seamless Yeeb Nkab Manufacturing
Feem ntau siab -kev ua tau zoo carbon steel OCTG kav yog tsim los ntawm cov txheej txheem seamless. Lub billet yog rhuab mus rau ib tug dov kub thiab pierced siv ib tug teb piercing zeb los tsim ib tug hollow plhaub. Lub plhaub no yog elongated thiab dov los ntawm ib tug series ntawm mandrel mills los yog ntsaws mills kom ua tau raws li qhov xav tau sab nraud txoj kab uas hla thiab phab ntsa thickness.
Txoj kev seamless tshem tawm longitudinal weld seams, uas txo cov ntsiab lus tsis muaj zog nyob rau hauv tawg los yog tawg loading. Dimensional tswj thaum lub sij hawm dov kom ntseeg tau concentricity thiab zoo ib yam phab ntsa thickness, ob qho tib si tseem ceeb rau withstanding sab nraud tsim siab.
Welded OCTG Yeeb Nkab Ntau Lawm
Hauv qee qhov kev siv, hluav taws xob tsis kam welded kav yuav siv tau rau cov hlua casing qhov chaw ua haujlwm nruab nrab. Hlau sawb yog tsim rau hauv cov duab cylindrical thiab welded longitudinally siv siab - zaus kuj welding. Lub weld seam yog tom qab ntawd kho cua sov thiab tshuaj xyuas kom ntseeg tau tias nws phim qhov kev ua haujlwm ntawm lub hauv paus hlau.
Txawm hais tias cov kav dej welded tuaj yeem muab cov txiaj ntsig zoo, cov kav dej seamless tseem nyiam rau cov qhov dej sib sib zog nqus thiab siab - ib puag ncig siab vim lawv cov qauv sib xws.
Cov lus hauv qab no sib piv seamless thiab welded manufacturing mus kom ze rau OCTG kav.
| Hom txheej txheem | Daim ntawv raw khoom | Kev ntseeg ruaj khov | Daim ntawv thov | Tus nqi tsim khoom |
|---|---|---|---|---|
| Seamless | Khoom billet | Tsis muaj weld seam | Sib sib zog nqus thiab siab - qhov dej siab | Siab dua |
| ERW Welded | Hlau sawb los yog phaj | Longitudinal weld seam | Nruab nrab - qhov tob tob | qis |
Kev kho cua sov thiab kho tshuab kho kom zoo
normalizing
qis dua - qib zog xws li J55 lossis K55 tuaj yeem ua haujlwm zoo, uas suav nrog cua sov siab tshaj qhov hloov pauv kub thiab tswj cua txias. Cov txheej txheem no refines grain loj thiab txhim kho uniformity yam tsis muaj ho nce hardness.
Quenching thiab Tempering
Siab dua - qib zog xws li N80, L80, thiab P110 yuav tsum tau quenching thiab tempering. Tom qab cua sov mus rau qhov kub austenitizing, cov kav dej tau txias sai sai hauv dej lossis roj los ua martensite. Tom qab tempering txo brittleness thaum tuav lub zog siab yield.
Kev tswj qhov kub thiab txias thaum lub sijhawm kho cua sov yog qhov tseem ceeb vim tias qhov hardness ntau dhau tuaj yeem ua rau muaj kev cuam tshuam rau sulfide kev ntxhov siab tawg hauv qhov chaw ua haujlwm qaub. Kev kho cua sov tswj xyuas kom muaj qhov sib npaug ntawm lub zog thiab lub zog tsim nyog rau cov xwm txheej hauv qab.
Kev ua tiav tiav thiab kev xa xov
Tom qab kev kho cua sov, cov kav dej tau ncaj nraim, qhov loj me, thiab qhov kawg tig ntsej muag. Dimensional raug yog qhov tseem ceeb rau kev sib dhos kom raug. OCTG kav yog ces threaded raws li API los yog hwm kev twb kev txuas specifications. Xov geometry yuav tsum muab txhua yam muaj zog thiab xau- nruj sealing nyob rau hauv axial nro thiab sab hauv siab.
Cov couplings yog tsim los ntawm cov qib carbon steel sib xws thiab threaded sab hauv kom phim cov yeeb nkab kawg. Xov compound yog siv thaum lub sij hawm teb los ua ke los txhim kho kev sib khi thiab tiv thaiv galling.
Kev tshuaj xyuas thiab kev ruaj ntseg zoo
Kev tswj kom zoo yog ib qho tseem ceeb rau OCTG manufacturing. Txhua lub yeeb nkab yuav tsum dhau qhov kev puas tsuaj thiab tsis yog -kev sim ua kom puas tsuaj kom ua tau raws li API 5CT cov qauv.
Cov lus hauv qab no qhia txog cov txheej txheem tshuaj xyuas tseem ceeb thiab lawv lub hom phiaj.
| Txoj kev tshuaj xyuas | Lub hom phiaj | Nthuav qhov tsis xws luag | Qhov tseem ceeb |
|---|---|---|---|
| Kev kuaj Ultrasonic | Internal flaw detection | Inclusions, laminations | Ua kom muaj kev ntseeg ruaj khov |
| Sib Nqus Particle Test | Nto crack detection | Nto discontinuities | Tiv thaiv kom tsis txhob qaug zog |
| Kev Ntsuas Hydrostatic | Kev ntsuas ntsuas ntsuas | Cov dej ntws tawm | Paub meej tias tawg tsis kam |
| Tensile thiab Impact Test | Mechanical Properties validation | Tsis txaus lub zog los yog toughness | Txheeb xyuas qhov ua raws qib |
| Dimensional soj ntsuam | Tolerance pov thawj | ovality, phab ntsa variation | Xyuas kom kev sib txuas haum |
Cov ntaub ntawv qhia txog kev taug qab nrog txhua pawg tsim khoom, txuas cov tshuaj lom neeg muaj pes tsawg leeg, kev kho cua sov, thiab cov txiaj ntsig tshuaj xyuas rau tus lej ntawm cov yeeb nkab. Qhov kev taug qab no yog qhov tseem ceeb rau kev tswj hwm kev pheej hmoo hauv kev ua haujlwm siab -tus nqi drilling.
Kev tiv thaiv txheej thiab kos npe
Txhawm rau tiv thaiv corrosion thaum khaws cia thiab thauj mus los, cov kav dej OCTG feem ntau coated nrog cov roj tiv thaiv lossis cov kua roj vanish. Cov cim qhia muaj xws li qib kev xaiv, tus naj npawb cua sov, qhov loj me, thiab cov ntsiab lus ntawm cov chaw tsim khoom. Kev kos cim meej ua kom muaj kev xaiv zoo thaum lub sijhawm ua haujlwm thiab ua kom yooj yim rau kev tswj cov khoom muag.
Txheej txheem kev koom ua ke thiab kev ua haujlwm thev naus laus zis
Kev tsim khoom niaj hnub OCTG suav nrog cov tshuab dov automated, khoos phis tawj - tswj cov cua sov cua sov, thiab cov tshuab soj ntsuam siab heev. Tiag -lub sij hawm saib xyuas ntawm qhov kub thiab txias, deformation tus nqi, thiab qhov tseeb qhov loj me yuav ua rau muaj kev sib xws thiab txo qhov sib txawv. Kev txheeb xyuas cov ntaub ntawv digital txhim kho kev taug qab thiab kev ruaj ntseg zoo thoob plaws cov khoom siv.
Kev tshawb fawb tsis tu ncua hauv metallurgy lub hom phiaj txhawm rau txhim kho lub zog - mus rau - qhov hnyav piv thiab tsis kam tiv thaiv corrosion thaum tswj cov nqi ua haujlwm. Raws li kev ua haujlwm drilling txuas mus rau qhov tob thiab hnyav dua, cov txheej txheem tsim khoom yuav tsum hloov zuj zus kom ua tau raws li kev ua haujlwm nruj dua.
Xaus
Cov txheej txheem tsim khoom ntawm cov pa roj carbon steel OCTG kav dej yog cov txheej txheem kev tsim vaj tsev sib txuas uas sib txuas cov kev tswj xyuas steelmaking, precision forming, advanced heat treatment, meticulous threading, and rigorous inspection. Seamless ntau lawm dominates siab - cov ntawv thov siab vim nws cov qauv kev sib xws, thaum welded txoj kev muab kev lag luam zoo nyob rau hauv nruab nrab. Los ntawm kev ua tib zoo tsim metallurgical thiab nruj ua raws li cov qauv, cov pa roj carbon steel OCTG cov kav dej tau ua tiav cov kev ntseeg tau tsim nyog los txhawb kev nyab xeeb thiab txuag roj thiab roj extraction.
