Ntau hom casing kav hauv kev lag luam roj thiab roj

Hauv kev lag luam roj thiab roj, plaub hom casing feem ntau siv:

1.Conduit: Conduit yog thawj conduit ntsia los txhawb qhov hnyav ntawm qhov drilling rig thiab tiv thaiv lub borehole los ntawm collapsing thaum lub sij hawm drilling. Conductor Casing: Feem ntau, tus neeg xyuas pib casing yog qhov loj tshaj plaws txoj kab uas hla siv hauv kev ua haujlwm drilling. Nws nyob ntawm qhov loj ntawm 20 mus rau 42 ntiv tes hauv txoj kab uas hla. Conductor casing feem ntau yog ua los ntawm cov qib qis carbon steel, xws li J55 lossis N80, los muab kev ruaj ntseg thaum pib qhov drilling.

2. Surface casing: yog qhov thib ob casing ntsia los muab kev tiv thaiv rau cov dej tshiab thiab tiv thaiv kom tsis txhob muaj kab mob. Nws txoj kab uas hla feem ntau yog loj dua li ntawm tus neeg xyuas pib vaj tse. Surface Casing: Nto casing yog thawj lub casing teem nyob rau hauv lub qhov dej tom qab drilling qhov conductor qhov. Nws muab kev tiv thaiv rau cov dej hauv av ntiav thiab cais cov txheej txheem sab saud. Qhov feem ntau siv rau saum npoo casing yog 13⅜ mus rau 20 nti inch. Cov qib khoom siv rau saum npoo tuaj yeem suav nrog qib carbon steel xws li J55, K55, N80, lossis cov ntaub ntawv muaj zog dua li L80 lossis C95

3. Intermediate Casing: Cov casing no tau nruab rau ntawm qhov tob sib txawv nyob ntawm qhov chaw zoo thiab yog siv los tiv thaiv lub qhov dej los ntawm kev tsim cov kua dej thiab kev kub ntxhov. Nws muab kev txhawb nqa ntxiv thiab kev cais tawm rau lub qhov dej. Intermediate Casing: Cov casing nruab nrab yog teem rau nruab nrab qhov tob thiab muab kev txhawb nqa ntxiv rau lub qhov dej. Qhov nruab nrab casing qhov ntau thiab tsawg yog li ntawm 7 txog 13⅜ ntiv tes hauv txoj kab uas hla, nyob ntawm tus qauv tsim. Cov qib khoom siv rau cov khoom nruab nrab tuaj yeem suav nrog L80, C95, lossis qib siab zog zoo li T95 lossis P110.

4. Production Casing: Qhov no yog qhov kawg casing ntsia rau hauv lub qhov dej tom qab drilling tiav. Nws muab cov txheej txheem kev ncaj ncees rau lub qhov dej thiab cais thaj chaw tsim khoom los ntawm ib puag ncig tsim los tiv thaiv kev xau thiab tswj kom muaj txiaj ntsig zoo. Cov plaub hom casing no feem ntau siv hauv kev lag luam roj thiab roj, tab sis kev hloov pauv tuaj yeem tshwm sim nyob ntawm cov xwm txheej tshwj xeeb thiab cov cai tswj hwm. Intermediate Casing: Cov casing nruab nrab yog teem rau nruab nrab qhov tob thiab muab kev txhawb nqa ntxiv rau lub qhov dej. Qhov nruab nrab casing qhov ntau thiab tsawg yog li ntawm 7 txog 13⅜ ntiv tes hauv txoj kab uas hla, nyob ntawm tus qauv tsim. Cov qib khoom siv rau cov khoom nruab nrab tuaj yeem suav nrog L80, C95, lossis qib siab zog zoo li T95 lossis P110.

Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias qhov luaj li cas thiab cov qib ntawm cov khoom tuaj yeem sib txawv raws li cov cai tshwj xeeb thiab cov qauv hauv cheeb tsam. Ntau yam alloys, cov ntaub ntawv tiv thaiv corrosion, thiab cov khoom siv kuj tseem tuaj yeem siv tau raws li cov xwm txheej zoo, xws li cov roj av qaub lossis cov qhov dej siab / kub kub.