CMC (sodium carboxymethyl cellulose) yog ib qho tseem ceeb ntawm cov dej-soluble polymer compound uas plays ntau lub luag haujlwm tseem ceeb hauv kev sib sib zog nqus dej hiav txwv drilling, tshwj xeeb tshaj yog nyob rau hauv kev npaj thiab kev ua tau zoo ntawm cov dej drilling. Deep-sea drilling yog ib qho kev lag luam nrog cov kev cai siab heev thiab ib puag ncig hnyav. Nrog rau kev txhim kho ntawm ntug dej hiav txwv roj thiab cov khoom siv roj, qhov ntsuas thiab qhov tob ntawm qhov tob hauv hiav txwv drilling tau maj mam nce. Raws li cov tshuaj muaj txiaj ntsig zoo, CMC tuaj yeem txhim kho kev ua haujlwm, kev nyab xeeb thiab kev tiv thaiv ib puag ncig ntawm cov txheej txheem drilling.
1. Lub luag haujlwm tseem ceeb hauv cov dej drilling
Thaum lub sij hawm sib sib zog nqus dej hiav txwv drilling, cov dej drilling ua haujlwm tseem ceeb xws li kev txhawb nqa lub phab ntsa zoo, ua kom txias lub laum me ntsis, tshem tawm cov chips, thiab tswj lub siab downhole. CMC yog ib qho viscosity regulator, rheological tus neeg saib xyuas thiab thickener, uas yog dav siv nyob rau hauv kev npaj ntawm drilling kua. Nws lub luag haujlwm tseem ceeb yog cuam tshuam nrog cov hauv qab no:
1.1 Thickening thiab kho viscosity
Hauv kev sib sib zog nqus dej hiav txwv, vim qhov nce hauv dej tob thiab siab, cov kua dej drilling yuav tsum muaj qee yam viscosity los xyuas kom meej nws cov dej ntws thiab nqa lub peev xwm. CMC tuaj yeem ua kom cov kua dej ua kom tuab thiab pab tswj kev ruaj ntseg ntawm cov dej drilling ntawm qhov sib txawv thiab qhov siab. Los ntawm kev kho cov concentration ntawm CMC, lub viscosity ntawm drilling kua yuav optimized los xyuas kom meej tias cov drilling kua muaj cov yam ntxwv txaus txaus, thiaj li hais tias nws muaj peev xwm ntws ywj siab nyob rau hauv complex complex sib sib zog nqus dej hiav txwv ib puag ncig thiab tiv thaiv teeb meem xws li wellbore collapse.
1.2 Txhim kho rheological zog
Cov khoom rheological ntawm cov kua dej drilling yog qhov tseem ceeb hauv kev sib sib zog nqus dej hiav txwv. CMC tuaj yeem txhim kho cov dej ntws ntawm cov dej drilling, ua kom nws ntws zoo dua hauv av, txo qhov kev sib txhuam ntawm cov laum me ntsis thiab cov phab ntsa hauv qhov dej, txo cov kev siv hluav taws xob thiab kev siv tshuab thaum lub sij hawm drilling, thiab txuas ntxiv lub neej kev pab cuam ntawm cov khoom siv drilling. Tsis tas li ntawd, cov khoom zoo rheological tseem tuaj yeem ua kom ntseeg tau tias cov kua dej drilling tuaj yeem nqa tau zoo thiab tiv thaiv kev sib sau ntawm cov khoom hauv cov dej drilling, yog li tsis txhob muaj teeb meem xws li txhaws.
2. Wellbore stability thiab inhibition ntawm hydrate tsim
Nyob rau hauv cov txheej txheem ntawm kev sib sib zog nqus dej hiav txwv drilling, wellbore stability yog ib qho teeb meem tseem ceeb. Cov cheeb tsam hauv hiav txwv sib sib zog nqus feem ntau ntsib cov teeb meem geological, xws li kev kub siab, kub siab, thiab cov av xau, uas tuaj yeem ua rau lub cev qhuav dej los yog cov kua dej poob. CMC pab txhim khu kev ruaj ntseg ntawm cov phab ntsa hauv qhov dej thiab tiv thaiv qhov dej ntws los ntawm kev txhim kho cov viscosity thiab rheological zog ntawm cov dej drilling.
Hauv kev sib sib zog nqus dej hiav txwv, kev tsim cov hydrates (xws li cov pa roj hydrates) kuj yog ib qho teeb meem uas tsis tuaj yeem tsis quav ntsej. Nyob rau hauv qhov kub thiab txias siab, cov roj hydrates tau yooj yim tsim thaum lub sij hawm drilling txheej txheem thiab ua rau clogging ntawm cov dej drilling. Raws li tus neeg saib xyuas dej tau zoo, CMC tuaj yeem cuam tshuam qhov tsim ntawm hydrates, tswj lub fluidity ntawm cov dej drilling, thiab xyuas kom meej qhov kev vam meej ntawm kev ua haujlwm drilling.
3. Txo kev cuam tshuam ib puag ncig
Nrog rau kev tiv thaiv ib puag ncig nruj zuj zus, qhov cuam tshuam rau ib puag ncig thaum lub sij hawm sib sib zog nqus dej hiav txwv drilling tau txais kev saib xyuas ntau dua. Daim ntawv thov ntawm CMC hauv dej hiav txwv tob tob tuaj yeem txo qhov emission ntawm cov khoom tsis zoo hauv cov dej drilling. Raws li cov khoom siv ntuj tsim, CMC muaj biodegradability zoo thiab ib puag ncig tus phooj ywg. Nws siv tuaj yeem txo cov tshuaj lom ntawm cov kua dej drilling thiab txo cov pa phem rau cov dej hiav txwv ecosystem.
Tsis tas li ntawd, CMC kuj tseem tuaj yeem txhim kho tus nqi rov ua dua ntawm cov dej drilling. Los ntawm kev kho qhov ua tau zoo ntawm cov dej drilling, txo qhov poob ntawm cov dej drilling, thiab xyuas kom meej tias cov dej drilling tuaj yeem rov qab siv dua, lub nra ntawm cov dej hiav txwv thaum lub sij hawm drilling txheej txheem raug txo. Qhov no yog qhov tseem ceeb heev rau txoj kev loj hlob ntawm cov dej hiav txwv tob tob.
4. Txhim kho drilling efficiency thiab kev nyab xeeb
Kev siv CMC tsis tsuas yog txhim kho kev ua tau zoo ntawm cov dej hauv hiav txwv tob tob, tab sis kuj tseem txhim kho kev ua haujlwm zoo thiab kev nyab xeeb ntawm kev ua haujlwm rau qee yam. Ua ntej, CMC tuaj yeem ua kom cov dej ntws zoo dua hloov mus rau qhov sib txawv geological, txo qhov tshwm sim ntawm cov yeeb nkab daig thiab txhaws thaum lub sij hawm drilling, thiab xyuas kom meej qhov kev vam meej ntawm kev ua haujlwm drilling. Thib ob, kev ua haujlwm ruaj khov drilling dej tuaj yeem txhim kho qhov tseeb ntawm qhov drilling thiab zam kev ua haujlwm tsis zoo los ntawm cov phab ntsa tsis ruaj khov lossis lwm yam. Tsis tas li ntawd, CMC tuaj yeem txo qhov kev pheej hmoo ntawm downhole siab hloov pauv, txo cov xwm txheej txaus ntshai xws li kev tawg thiab cov av nkos uas yuav tshwm sim thaum lub sijhawm drilling, thiab ua kom muaj kev nyab xeeb ntawm kev ua haujlwm.
5. Tus nqi-zoo thiab kev lag luam
Txawm tias daim ntawv thov ntawmCMCyuav nce qee cov nqi, cov nqi no kuj tswj tau piv rau kev txhim kho hauv kev drilling efficiency thiab kev ruaj ntseg nws coj. CMC tuaj yeem txhim kho kev ruaj ntseg ntawm cov dej drilling thiab txo qhov xav tau ntawm lwm cov tshuaj ntxiv, yog li txo tus nqi tag nrho ntawm cov dej drilling. Nyob rau tib lub sijhawm, kev siv CMC tuaj yeem txo cov khoom siv poob thiab cov nqi kho mob, txhim kho kev tsim khoom ntawm kev ua haujlwm drilling, thiab yog li ua rau muaj txiaj ntsig kev lag luam ntau dua.
Raws li cov tshuaj muaj txiaj ntsig zoo, CMC ua lub luag haujlwm tseem ceeb hauv kev sib sib zog nqus dej hiav txwv. Nws tuaj yeem tsis tsuas yog txhim kho kev ua haujlwm ntawm cov dej drilling thiab txhim kho kev ruaj ntseg ntawm qhov dej, tab sis kuj tseem cuam tshuam qhov tsim ntawm hydrates, txo cov pa phem ib puag ncig, thiab txhim kho kev ua haujlwm thiab kev nyab xeeb. Nrog rau kev txhim kho txuas ntxiv ntawm kev siv thev naus laus zis hauv dej hiav txwv tob tob thiab kev txhim kho txuas ntxiv ntawm kev tiv thaiv ib puag ncig, daim ntawv thov CMC yuav dhau los ua ntau dua thiab dhau los ua ib qho tseem ceeb ntawm cov ntaub ntawv tseem ceeb hauv cov dej hiav txwv tob tob.
Post lub sij hawm: Dec-21-2024