OCTG yog dab tsi?
Nws suav nrog Drill Pipe, Steel Casing Pipe thiab Tubing
OCTG yog lub ntsiab lus ntawm Roj Lub Tebchaws Tubular Khoom, nws tsuas yog hais txog cov khoom siv yeeb nkab siv hauv cov roj thiab roj ntau lawm (drilling operations). OCTG tubing feem ntau yog tsim los ntawm API specifications lossis lwm yam qauv specifications. Nws tseem tuaj yeem suav hais tias yog lub npe dav dav rau cov kav dej tho, cov kav hlau steel, fittings, couplings thiab accessories siv nyob rau hauv onshore thiab offshore roj thiab roj kev lag luam. Txhawm rau tswj cov khoom siv tshuaj thiab siv cov kev kho cua sov sib txawv, cov kav dej OCTG tau muab faib ua cov khoom sib txawv nrog ntau tshaj kaum qib.

Hom Roj Lub Tebchaws Tubular Khoom (OCTG kav)
Muaj peb yam tseem ceeb ntawm Roj Lub Tebchaws Tubular Cov Khoom Muag, uas suav nrog Drill yeeb nkab, Casing yeeb nkab, thiab Tubing yeeb nkab.

OCTG Laum yeeb nkab - Cov yeeb nkab rau Drilling
Laum yeeb nkab yog ib qho hnyav, seamless raj uas tig lub laum me ntsis thiab circulates drilling kua. Nws tso cai rau cov dej drilling yuav tsum tau pumped los ntawm me ntsis thiab rov qab mus rau lub annulus. Cov yeeb nkab tuaj yeem tiv taus axial nro, tsis tshua muaj siab torque thiab siab sab hauv. Tias yog vim li cas cov yeeb nkab muaj zog heev thiab tseem ceeb hauv OCTG endeavour.
Drill Pipe feem ntau txhais tau hais tias cov kav hlau ntev ntev siv hauv qhov drilling, cov qauv hauv API 5DP thiab API SPEC 7-1.
Yog tias koj tsis nkag siab txog cov roj zoo, nws yog qhov chaw nruab nrab ntawm lub casing thiab cov kav dej lossis cov kav dej, cov kav dej lossis cov kav dej tam sim ntawd nyob ib puag ncig nws. Annulus tso cai rau cov kua dej ntws mus rau hauv lub qhov dej. Yog li thaum peb tab tom tham txog cov yeeb nkab uas muaj zog lossis hnyav OCTG, peb tab tom tham txog Drill yeeb nkab.
Hlau Casing yeeb nkab - Stabilize lub qhov dej
Hlau casing kav yog siv los ua kab lub borehole uas tab tom khawb rau hauv av kom tau roj. Ib yam li cov yeeb nkab laum, cov yeeb nkab steel kuj tuaj yeem tiv taus axial nro. Qhov no yog ib tug loj-inch yeeb nkab tso rau hauv ib tug drilled borehole thiab tuav rau hauv qhov chaw nrog xis mas. Lub casing yog raug rau lub axial nro ntawm nws qhov hnyav tuag, lub siab sab nraud ntawm lub pob zeb nyob ib puag ncig nws, thiab lub siab sab hauv ntawm cov kua purging. Thaum nws zoo cemented nyob rau hauv qhov chaw, cov txheej txheem drilling yog pab raws li hauv qab no:
· Casing sticks lub laum txoj hlua thiab tiv thaiv tsis ruaj tsis khov sab sauv los ntawm caving.
· Nws tiv thaiv cov dej hauv qhov dej tsis huv.
· Nws tso cai rau lub hauv paus du rau kev tsim khoom siv installation.
· Nws zam kev kis kab mob ntawm thaj chaw tsim khoom thiab poob kua.
· Nws cais thaj chaw siab siab ntawm qhov chaw
· Thiab ntau dua

Lub casing yog cov yeeb nkab hnyav heev uas tseem ceeb rau OCTG.
OCTG Casing Pipe txheem
Steel Casing yeeb nkab qauv feem ntau raug xa mus rau API 5CT, Cov Qib Siab hauv J55 / K55, N80, L80, C90, T95, P110 thiab lwm yam. Ntev ntev hauv R3 uas nominal ntawm 40 ft / 12 meters. Casing yeeb nkab xaus kev sib txuas hom feem ntau yog BTC thiab LTC, STC. Thiab cov kev sib txuas hwm tseem yuav tsum tau muaj ntau hauv cov roj thiab roj piping project.
Hlau Casing Pipe Nqe
Tus nqi ntawm steel casing yeeb nkab yog qis dua tus pas nrig lossis OCTG yeeb nkab nqi, uas feem ntau yog 200 USD siab dua li API 5L yeeb nkab. Xav txog tus nqi ntawm cov xov + cov pob qij txha lossis kev kho cua sov.
OCTG Pipe - thauj cov roj thiab roj rau saum npoo
OCTG Pipe mus rau hauv lub casing vim qhov no yog cov yeeb nkab uas cov roj khiav tawm. Tubing yog qhov yooj yim tshaj plaws ntawm OCTG thiab feem ntau tuaj hauv 30 ft (9 m) ntu, nrog cov xov txuas ntawm ob qho kawg. Lub raj xa dej no yog siv los thauj cov roj av lossis cov roj av los ntawm cov chaw tsim khoom mus rau cov chaw uas nws yuav ua tiav tom qab drilling tiav.
Lub raj yuav tsum muaj peev xwm tiv taus cov kev kub ntxhov thaum lub sij hawm rho tawm thiab tiv taus cov khoom thauj thiab deformations cuam tshuam nrog kev tsim khoom thiab rov ntim khoom. Ib yam li yuav ua li cas lub plhaub tau tsim, cov raj kuj tau ua tib yam, tab sis ib qho kev sib xyaw ntxiv yog siv los ua kom nws tuab.
OCTG Yeeb Nkab Standard
Zoo ib yam li lub plhaub yeeb nkab qauv, OCTG yeeb nkab hauv API 5CT kuj muaj cov khoom siv tib yam (J55 / K55, N80, L80, P110, thiab lwm yam), tab sis cov yeeb nkab txoj kab uas hla tuaj yeem ncav cuag 4 1/2 ", thiab nws xaus. nce hauv ntau hom xws li BTC, EUE, NUE, thiab hwm. Feem ntau, EUE cov kev sib txuas tuab dua.