Thaum ob qho tib si yog cov kav hlau tseem ceeb siv hauv kev lag luam hluav taws xob,OCTG(Oil Lub Tebchaws Tubular Khoom) thiabKab Yeebpab tag nrho cov theem sib txawv ntawm cov roj thiab roj lifecycle.
Txoj kev yooj yim tshaj plaws kom paub qhov txawv ntawm lawv yog:OCTG yog rau kom tau cov roj tawm hauv av (downhole), hos Kab Yeeb yog rau kev txav mus thoob lub tebchaws (kev thauj mus los).
Lub luag haujlwm ua haujlwm
OCTG Tube:Siv tshwj xeeb hauv covdrilling thiab ntau lawmtheem. Cov kav dej no nkag mus rau hauv lub qhov dej nws tus kheej. Lawv suav nrog laum yeeb nkab (kom laum lub qhov), casing (kom kab lub qhov), thiab tubing (kom cov roj tuaj).
Kab Yeeb:Siv raukev thauj mus los nruab nrab. Cov kav dej no yog siv los tsim cov kav dej uas nqa cov roj, roj, dej, lossis slurry tshaj qhov deb ntawm lub qhov dej mus rau qhov chaw refineries lossis lub tank cia.
Kev lag luam Specifications (API Standards)
OCTG:Kev tswj hwm feem ntau los ntawmAPI 5 CT(rau casing thiab Tubing) thiabAPI 5 DP(rau Drill Pipe).
Kab Yeeb:Kev tswj hwm feem ntau los ntawmAPI 5L.
Txoj kev sib txuas
OCTG (Tshooj):Vim tias cov kav dej no yuav tsum tau qis qis rau hauv qhov dej ib los ntawm ib qho, lawv yuav luag txhua zausthreaded thiab ua ke. Lawv tau screwed ua ke ntawm lub rig hauv pem teb. Lawv tsis tshua muaj welded vim hais tias lawv yuav tsum tau rub tawm (nyob rau hauv cov ntaub ntawv ntawm tubing) los yog yuav tsum tau muab ntsia sai heev.
Kab yeeb nkab (welded):Vim tias cov kav dej khiav mus txog ntau pua mais thoob plaws av lossis hiav txwv, cov kav dej feem ntau muajbeveled xausthiab yogtaub qab-weldedua ke nyob rau hauv daim teb los tsim ib tug tas mus li, leak{0}} pov thawj foob.
Mechanical Stresses thiab Tsim
OCTG:Tsim los tiv tausVertical Tension(txhawb qhov hnyav ntawm 10,000 ft hlua),Sab nraud Collapse(siab los ntawm pob zeb thiab cov kua dej sab nraud), thiabSab hauv tawg. Lawv feem ntau yuav tsum ua "Sour Service" (H2S corrosion) nyob rau hauv lub qhov dej.
Kab Yeeb:Tsim feem ntau los lisInternal Fluid Pressurehla kev deb. Ib qho tseem ceeb rau kab yeeb nkab yogweldabilitythiabtawg toughness(kom ntseeg tau tias qhov tawg tsis txav mus deb ntawm cov yeeb nkab).
Sib piv Summary Table
| Feature | OCTG cev | Kab Yeeb |
| Kev siv loj | Downhole (Wellbore) | Nto / Subsea (Kev Thauj Mus Los) |
| Cheebtsam | Casing, Tubing, Laum Pipe | Cov kav xa dej |
| API Spec | API 5CT, API 5DP | API 5L |
| Kev sib txuas | Xov & Coupled | Butt-Welded |
| Lub zog tseem ceeb | Collapse & Tension kuj | Internal siab & Weldability |
| Kev ruaj khov | Permanent (Casing) / Tshem tau (Tubing) | Permanent (pipeline) |
API Yeeb Nkab Hoobkas
API Pipe Test equipments
FAQ
Cov qib ntawm OCTG yeeb nkab yog dab tsi?
Cov qib OCTG yog categorized los ntawm covAPI 5 CT(casing/tubing) thiabAPI 5 DP(drill yeeb nkab) cov qauv raws li lawv lub zog tawm los thiab tshuaj tiv thaiv:
1. Casing thiab Tubing Qib (API 5CT)
Tsawg zog:H40, J55, K55 (Siv rau qhov ntiav ntiav, qis- qhov dej siab).
Lub zog nruab nrab:N80 (N80-1 / N80-Q), L80 (L80 yog rau kev pabcuam qaub).
Corrosion Resistant:C90, T95, C110 (Tshwj xeeb rau cov qhov dej nrog H2S ).
Siab zog:P110, Q125 (Rau qhov tob, siab - qhov dej siab).
2. Drill Pipe Qib (API 5DP)
Standard Qib:E-75, X-95, G-105, S-135 (Lub zog nce nrog tus lej; S-135 yog qhov siab tshaj).
Puas yog kab yeeb nkab OCTG?
Tsis muaj, kab yeeb nkab tsis suav tias yog OCTG.
Thaum ob qho tib si siv hauv kev lag luam roj thiab roj, lawv ua haujlwm sib txawv thiab ua raws li cov qauv sib txawv:
OCTG (API 5CT/5DP):Sivsab hauvlub qhov dej (downhole) rau drilling thiab ntau lawm.
Kab yeeb nkab (API 5L):Siv rauthaujkua (pipelines) nruab nrab ntawm qhov dej, refineries, thiab cov neeg siv khoom.
