Polyanionic Cellulose (PAC) yog cov dej-soluble cellulose derivative uas yog siv dav hauv cov roj drilling, feem ntau yog siv rau kev npaj cov dej drilling. Nws tau dhau los ua ib qho tseem ceeb additive nyob rau hauv lub drilling kua system vim nws superior zog, xws li viscosity li, kua poob, stability thiab ib puag ncig tiv thaiv.
1. Txo cov dej poob
Kev tswj tsis tau dej yog qhov tseem ceeb hauv cov roj drilling. Thaum cov kua dej sib txuas nrog cov tsim thaum lub sijhawm drilling, nws yuav ua rau cov av nkos tsim thiab ua kom nkag mus rau hauv qhov tsim, ua rau muaj kev puas tsuaj thiab cuam tshuam rau kev ua haujlwm ntawm qhov drilling. PAC ua tau zoo txo cov dej poob thiab lim cov ntxeem tau rau hauv kev tsim los ntawm kev tsim cov yeeb yaj kiab tiv thaiv hauv cov dej drilling, yog li txo qhov tsim muaj kuab paug. Cov cuab yeej no pab txhim kho kev ruaj ntseg zoo thiab tiv thaiv cov roj thiab roj tsim.
Txoj Cai
PAC yaj hauv dej los tsim cov tshuaj colloidal nrog viscosity siab. Thaum cov kua dej sib txuas rau kev tsim, PAC cov molecules tuaj yeem tsim cov ncuav mog qab zib tuab ntawm qhov tsim los tiv thaiv kev nkag mus ntxiv ntawm cov kua theem. Lub ncuav mog qab zib no muaj qhov ua tau zoo thiab tawv, thiab tuaj yeem tiv taus qhov sib txawv ntawm qhov sib txawv, yog li txo qhov pom tsis zoo.
2. Ua kom cov viscosity ntawm drilling kua
Kev txhim kho viscosity yog lwm qhov tseem ceeb ntawm PAC hauv cov dej drilling. Drilling kua yuav tsum muaj qee yam viscosity los nqa cov txiav rov qab, thiaj li ua kom huv si ntawm lub qhov dej thiab tswj kev ruaj ntseg drilling. Raws li lub viscosity enhancer, PAC tuaj yeem ua kom cov viscosity ntawm cov dej drilling, txhim khu lub peev xwm ntawm cov dej drilling kom nqa cov txiav, thiab txhawb kev xa rov qab thiab tawm ntawm cov txiav.
Txoj Cai
PAC molecules yaj nyob rau hauv cov dej drilling los tsim ib tug polymer saw qauv, uas ua rau kom lub internal kuj ntawm cov kua. Cov qauv no tuaj yeem ua kom pom tseeb viscosity thiab cov txiaj ntsig ntawm cov dej drilling, thiab txhim kho nws lub peev xwm nqa thiab tshem tawm cov txiav. Nyob rau tib lub sijhawm, cov viscosity nce cov txiaj ntsig ntawm PAC tseem ua haujlwm tau zoo nyob rau hauv qhov kub thiab txias siab, thiab tsim nyog rau kev sib sib zog nqus zoo drilling thiab complex geological tej yam kev mob.
3. Txhim khu kev ruaj ntseg zoo
Wellbore stability yog ib qho teeb meem uas yuav tsum tau saib xyuas tshwj xeeb thaum lub sij hawm drilling. Cov kua dej drilling yuav tsum muaj peev xwm ua kom ruaj khov ntawm phab ntsa hauv qhov dej kom tiv thaiv phab ntsa ntawm qhov dej los ntawm kev sib tsoo. PAC qhov kev sib xyaw ua ke ntawm kev txo qhov pom thiab nce viscosity hauv cov dej drilling tuaj yeem txhim kho kev ruaj ntseg zoo.
Txoj Cai
PAC tiv thaiv cov kua dej los ntawm kev nkag mus rau qhov tsim los ntawm kev tsim cov av nkos ncuav mog qab zib txheej rau ntawm phab ntsa ntawm lub qhov dej. Nyob rau tib lub sijhawm, nws cov viscosity tuaj yeem txhim kho qhov adhesion ntawm cov phab ntsa zoo thiab txo cov tiam ntawm microcracks hauv kev tsim, yog li txhim kho cov neeg kho tshuab stability ntawm lub qhov dej. Tsis tas li ntawd, PAC tseem tuaj yeem txhim kho cov thixotropy ntawm cov kua dej drilling, kom nws tsim muaj zog txhawb zog thaum nws nyob ruaj ruaj, thiab tswj kom tsim nyog fluidity thaum nws ntws, ntxiv stabilizing lub phab ntsa zoo.
4. Cov yam ntxwv tiv thaiv ib puag ncig
Nrog rau kev txhim kho kev tiv thaiv ib puag ncig, cov tshuaj siv hauv cov dej drilling yuav tsum muaj kev tiv thaiv ib puag ncig zoo. PAC yog cov khoom hloov kho ntawm ntuj cellulose, nrog rau biodegradability zoo thiab tsis muaj tshuaj lom, uas ua tau raws li kev tiv thaiv ib puag ncig.
Txoj Cai
PAC yog cov khoom siv tshuaj kho mob raws li ntuj tsim cellulose, tsis muaj tshuaj lom, thiab tuaj yeem degraded los ntawm cov kab mob hauv lub ntuj. Piv nrog cov hluavtaws hluavtaws, PAC muaj kev cuam tshuam tsawg dua rau ib puag ncig thiab muaj ntau dua nyob rau hauv txoj kab nrog cov kev xav tau ntawm ntsuab drilling. Cov yam ntxwv no ua rau nws muaj txiaj ntsig zoo nyob rau hauv ib puag ncig rhiab qhov chaw thiab offshore drilling.
5. Kub thiab ntsev tsis kam
Nyob rau hauv qhov kub thiab txias ib puag ncig, cov av nplaum thiab cov polymers feem ntau muaj teeb meem tswj kev ruaj ntseg ntawm cov dej drilling, thaum PAC nthuav tawm qhov kub thiab txias thiab ntsev thiab tuaj yeem tswj tau cov txiaj ntsig ntawm cov dej hauv qhov chaw nyuaj.
Txoj Cai
Anionic pawg (xws li pawg carboxyl) tau nkag mus rau hauv cov qauv molecular ntawm PAC. Cov pab pawg no tuaj yeem sib pauv ions nrog ntsev ions nyob rau hauv ib qho chaw muaj ntsev kom muaj kev ruaj ntseg ntawm cov qauv molecular. Nyob rau tib lub sijhawm, PAC muaj kev ruaj ntseg siab thermal thiab yuav tsis ua rau muaj kev puas tsuaj loj nyob rau hauv qhov kub thiab txias, ua kom cov viscosity thiab pom muaj peev xwm ntawm cov dej drilling. Yog li, PAC muaj cov txiaj ntsig zoo heev hauv cov dej ntsev slurries thiab cov qhov dej kub kub.
6. Optimize drilling kua rheology
Rheology hais txog qhov ntws thiab deformation yam ntxwv ntawm cov kua dej hauv qab shear quab yuam. PAC tuaj yeem kho cov rheology ntawm cov dej drilling kom ntseeg tau tias lawv muaj cov pob zeb zoo thiab tuaj yeem ntws dawb hauv lub qhov dej thaum lub sijhawm drilling.
Txoj Cai
PAC cuam tshuam nrog lwm cov khoom hauv cov kua dej drilling los tsim cov qauv sib txuas sib txuas thiab kho cov txiaj ntsig tawm los thiab cov yam ntxwv ntawm cov kua dej drilling. Qhov kev tswj xyuas no ua rau cov kua dej drilling kom pom cov pob zeb zoo nqa lub peev xwm thiab cov dej ntws tawm thaum lub sij hawm drilling, tshwj xeeb tshaj yog nyob rau hauv complex formations thiab high-pressure qhov.
7. Case tsom xam
Hauv kev siv tswv yim, PAC tau siv dav hauv ntau lub tshuab drilling kua. Piv txwv li, nyob rau hauv ib qho kev sib sib zog nqus qhov project, ib tug dej-raws li drilling kua uas muaj PAC tau siv. Cov txiaj ntsig tau pom tias PAC txo qis pom qhov poob ntawm cov dej drilling, txhim kho qhov ruaj khov ntawm lub qhov dej, txhim kho qhov drilling efficiency, thiab txo qhov downhole kev sib tsoo tus nqi los ntawm kev tsim muaj kuab paug. Nyob rau tib lub sijhawm, PAC kuj ua tau zoo nyob rau hauv marine drilling, thiab tseem tuaj yeem tswj tau qhov kev ua tau zoo ntawm cov dej drilling nyob rau hauv siab salinity thiab kub kub los xyuas kom meej qhov kev vam meej ntawm kev ua haujlwm drilling.
Daim ntawv thov ntawm polyanionic cellulose nyob rau hauv cov roj drilling yog tsuas yog xav txog nyob rau hauv nws cov yam ntxwv zoo heev ntawm kev txo pom poob, nce viscosity, txhim kho wellbore stability thiab ib puag ncig tiv thaiv. Nws daim ntawv thov nyob rau hauv dej-raws li thiab roj-raws li drilling kua tsis tsuas yog txhim kho drilling efficiency thiab txo downhole kev huam yuaj tus nqi, tab sis kuj yog ib puag ncig tus phooj ywg thiab pab ua kom tiav lub hom phiaj ntawm ntsuab drilling. Nyob rau hauv qhov nyuaj geological tej yam kev mob thiab kub thiab kub siab ib puag ncig, PAC qhov kub thiab txias kuj tseem qhia txog qhov tseem ceeb ntawm cov roj drilling. Yog li ntawd, polyanionic cellulose occupies ib indispensable txoj hauj lwm nyob rau hauv niaj hnub roj drilling tshuab.
Post lub sij hawm: Jun-14-2024