Hauv kev ua haujlwm zoo niaj hnub no, kev ua tiav cov txiaj ntsig zoo thiab txhim khu kev qha yog qhov tseem ceeb rau kev sib cais zonal ntev.
Dab tsi yog spacer hauv cementing?
Ib tug spacer yogcov kua nplaum siv los pab tshem tawm cov kua dej ua ntej ua haujlwm cementing thawj.
Vim li cas thiaj xav tau SpacerOilwell Cementing Additive?
Lub spacer ua lub luag haujlwm tseem ceeb hauv kev ua kom ntseeg tau tias cov kua dej ntws tawm tau zoo los ntawm lub qhov dej thiab qhov casing. Yog tias tsis muaj kev tshem tawm cov av nkos, cov kua dej seem seem tuaj yeem ua rau cov cement slurry thiab ua rau kev sib txuas tsis muaj zog lossis txawm tias cov cement tsis ua haujlwm.
Lub spacer ua raws li qhov tsis sib xws ntawm cov kua dej drilling thiab cov cement slurry, tiv thaiv kev sib xyaw thiab txhim kho cov dej hloov pauv.
Tus Spacer ua haujlwm li cas hauv cov txheej txheem tshem tawm?
Ib tug spacer yog pumped ntawm drilling kua thiab cement. Nws qhov ceev thiab rheological zog yog ua tib zoo tsim kom ua tau raws li ob qho tib si kua.
Lub displacement mechanism muaj xws li:
- Kev sib txuam ntom ntom kom ua tiav qhov kev pom zoo hydraulic sib cais
- Kho viscosity los tsim kom muaj kev sib txhuam txaus rau cov av nkos tshem tawm
- Txhawb nqa turbulent los yog ntsaws ntws los ntxuav lub qhov dej ntawm phab ntsa
- Siv cov surfactants los rhuav tshem cov emulsions thiab txo cov roj- ntub dej
Los ntawm cov txheej txheem no, tus spacer sweeps tawm gelled los yog kho cov av nkos, ua kom cov cement tiv tauj lub casing thiab tsim ncaj qha.
Cov khoom xyaw dab tsi uas nquag siv hauv cov kua dej Spacer?
Hom spacer systems yog tsim los siv:
- Surfactants: txhawm rau txo qhov nro thiab tawg roj-cov yeeb yaj kiab ntub dej
- Polymers thiab viscosifiers: kho rheology thiab ncua kev ruaj ntseg
- Cov khoom hnyav: kom phim lub siab zoo thiab tswj ECD
- Solvents thiab dispersants: pab ntxuav cov av nkos thiab tiv thaiv cov khoom seem
Nyob ntawm cov xwm txheej zoo, spacers yuav yoghnyav(siab-density) los yogtsis hnyav(lub teeb hnyav).
Thaum twg yog Spacers feem ntau siv?
Spacers yog dav siv nyob rau hauv:
- Cov haujlwm tseem ceeb cementing rau saum npoo thiab ntau lawm casing
- Deviated los yog kab rov tav qhov dej yuav tsum tau txhim kho qhov dej huv
- Siab -kub lossis ntev - ntu kev ua haujlwm cementing
- Cov hauj lwm uas muaj roj-raws li av nkos (OBM) los yog hluavtaws-raws av nkos (SBM)
- Cov cheeb tsam tseem ceeb uas cov cement bonding zoo yog qhov tseem ceeb
Hauv kev ua tiav zoo niaj hnub no, yuav luag txhua qhov kev ua haujlwm cementing suav nrog lub spacer kom ua kom muaj kev ncaj ncees ntawm cov cement.
Yuav ua li cas yog tias tsis siv Spacer?
Yog tsis muaj spacer, qhov tshwm sim tuaj yeem suav nrog:
- Kev tshem tawm cov av nkos tsis zoo
- Cement paug
- Tsim kev puas tsuaj los ntawm kev tsis zoo zonal cais
- Micro-annulus lossis channeling
- Txo compressive zog
- Txoj hauj lwm tsis ua hauj lwm yuav tsum tau kho qhov nyem cementing
Yog li ntawd, spacers tsis yog xaiv tau-lawv yog cov khoom tseem ceeb rau kev tso chaw cement zoo thiab ntev -lub sij hawm zoo.
Dab tsi yog qhov zoo ntawm kev siv lub tshuab tsim kom zoo Spacer?
Ib qhov zoo-designed spacer muab cov txiaj ntsig hauv qab no:
- Txhim kho kev khiav hauj lwm efficiency
- Txo kev pheej hmoo ntawm kev sib xyaw ua ke
- Kev sib raug zoo ntawm cov cement thiab tsim / casing
- Txo tus nqi tag nrho los ntawm kev tiv thaiv kev ua haujlwm kho
- Txhim khu kev ncaj ncees thiab kev ua haujlwm zoo
Hauv luv, spacers pab xyuas kom meej tias txoj haujlwm cement ua tiav thawj zaug.
Xaus
Lub spacer hauv cementing yog cov kua dej tshwj xeeb uas siv los ntxuav lub qhov dej thiab tshem tawm cov av nkos ua ntej siv cov cement. Nws txhim kho kev sib raug zoo, tiv thaiv kev sib kis, thiab ua kom muaj kev vam meej ntawm kev ua haujlwm ntawm thawj cementing. Raws li kev tsim kho tau zoo dua, kev tsim thiab siv cov tshuab spacer zoo tau dhau los ua qhov tseem ceeb dua li qub.
