Qhov tseem ceeb thiab kev faib cov roj casings

Roj casings yog cov kav hlau tseem ceeb siv los txhawb cov phab ntsa ntawm cov roj thiab cov qhov dej, ua kom muaj kev ruaj ntseg ntawm lub qhov dej thaum lub sijhawm drilling thiab tom qab ua tiav. Lawv lub luag haujlwm tseem ceeb yog tswj xyuas qhov kev ncaj ncees ntawm lub qhov dej, tiv thaiv phab ntsa tawg, thiab xyuas kom zoo ntawm cov dej drilling. Tus naj npawb thiab txheej ntawm casings siv nyob rau hauv txhua lub qhov dej sib txawv raws li qhov tob drilling thiab geological tej yam kev mob. Ib zaug ntsia, casings yuav tsum tau cementing kom ruaj ntseg lawv txoj hauj lwm thiab, vim lawv ib zaug-siv xwm, tsis tuaj yeem rov qab siv dua. Casings suav txog ntau dua 70% ntawm tag nrho cov kev siv cov kav dej zoo.

Classification ntawm Casings

Raws li lawv siv, cov roj casings tuaj yeem muab faib ua hom hauv qab no:

1. Cov yeeb nkab: Muab tso rau ntawm lub qhov dej, nws txhawb nqa cov khoom siv drilling thiab tiv thaiv cov casings tom qab los ntawm cov teebmeem saum npoo.
2. Nto Casing: Tiv thaiv sab qaum ntawm lub qhov dej los ntawm cov txheej txheej saum npoo av, tiv thaiv cov dej hauv av los yog lwm yam kev tsim.
3. Intermediate Casing: Muab kev txhawb nqa ntxiv rau lub qhov dej thiab cais qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv.
4. Production Casing: Muab kev txhawb nqa zaum kawg rau lub wellbore thiab koom ncaj qha rau hauv cov txheej txheem roj ntau lawm.

Hom Roj Tubing

Cov kav dej tshwj xeeb yog siv rau kev drilling thiab thauj cov roj thiab roj, suav nrog:

1. Tubing ntau lawm: Siv los thauj cov roj thiab roj los ntawm cov dej hauv qab mus rau qhov chaw.
2. Casing: Txhawb nqa lub qhov dej thiab ua kom cov txheej txheem drilling thiab ua tiav.
3. Laum Pipe: Txuas lub laum me ntsis rau cov khoom siv drilling, xa lub zog drilling.

Yuav tsum tau thiab cov qauv rau cov roj casings

Muab cov txheej txheem nyuaj thiab hloov pauv hauv av, cov roj casings yuav tsum ua tau raws li cov hauv qab no:

• Yuav tsum muaj zog: Casings yuav tsum muaj lub zog siab los tiv thaiv lub siab thiab kev ntxhov siab ntawm cov formations. Ntau qib steel siv, suav nrog J55, K55, N80, L80, C90, T95, P110, Q125, V150, thiab lwm yam. Cov qib sib txawv yog tsim rau qhov sib txawv ntawm qhov tob thiab ib puag ncig.
• Corrosion Resistance: Nyob rau hauv ib puag ncig corrosive, casings yuav tsum muaj txaus tiv thaiv corrosion.
• Collapse Resistance: Nyob rau hauv complex geological tej yam kev mob, casings yuav tsum tau muaj kev tiv thaiv zoo rau lub cev qhuav dej kom tiv thaiv wellbore tsis ua hauj lwm.

Qhov tseem ceeb ntawm Roj Tubing hauv Kev Lag Luam Roj

Kev lag luam roj cia siab ntau rau cov roj tubing, nrog rau kev cuam tshuam tseem ceeb rau tus nqi thiab kev ua haujlwm zoo. Qhov tseem ceeb yog xav txog nyob rau hauv ntau yam:

1. Ntau qhov ntau thiab tus nqi siab: Kev siv cov kav dej zoo yog qhov tseem ceeb, thiab cov nqi yog siab. Piv txwv li, drilling 1 meter ntawm qhov tob yuav tsum muaj kwv yees li 62 kg ntawm cov kav dej, suav nrog 48 kg ntawm casings, 10 kg ntawm cov tubing ntau lawm, 3 kg ntawm laum kav, thiab 0.5 kg ntawm lwm cov kav dej. Kev txo qis kev siv thiab cov nqi ua rau muaj kev lag luam tseem ceeb.
2. Kev cuam tshuam rau Drilling Techniques: Cov khoom siv kho tshuab thiab ib puag ncig kev ua haujlwm ntawm cov kav dej ncaj qha cuam tshuam rau kev siv cov txheej txheem siab heev thiab txhim kho kev tsim khoom.
3. Kev nyab xeeb thiab kev ntseeg siab: Kev ua tsis tiav hauv cov kav dej tuaj yeem ua rau poob nyiaj txiag ntau, ua rau lawv txoj kev nyab xeeb thiab kev ntseeg siab tseem ceeb heev rau kev lag luam roj.

Hauv cov ntsiab lus, cov roj casings ua lub luag haujlwm tseem ceeb hauv cov roj zoo drilling, nrog rau lawv cov kev ua tau zoo thiab kev ua haujlwm ncaj qha cuam tshuam rau kev ua tau zoo thiab cov txiaj ntsig kev lag luam ntawm tag nrho cov txheej txheem drilling.