Carboxymethyl cellulose (CMC) yog cov dej-soluble polymer muab los ntawm cellulose, feem ntau siv nyob rau hauv ntau yam lag luam rau nws thickening, stabilizing, thiab emulsifying zog. High viscosity CMC (CMC-HV) tshwj xeeb muaj cov yam ntxwv tshwj xeeb uas ua rau nws muaj nuj nqis hauv kev siv roj av.
1. Chemical Structure thiab Composition
CMC yog tsim los ntawm cov tshuaj hloov kho ntawm cellulose, ib tug natural polymer pom nyob rau hauv cov nroj tsuag cell phab ntsa. Cov txheej txheem suav nrog kev qhia txog cov pawg carboxymethyl (-CH2-COOH) rau hauv cov pob txha cellulose, uas ua rau cov cellulose soluble hauv dej. Qhov degree ntawm kev hloov pauv (DS), uas yog hais txog qhov nruab nrab ntawm cov carboxymethyl pawg ib chav tsev anhydroglucose hauv cellulose molecule, cuam tshuam rau cov khoom ntawm CMC. Petroleum qib siab viscosity CMC feem ntau muaj DS siab, txhim kho nws cov dej solubility thiab viscosity.
2. High viscosity
Lub ntsiab lus ntawm CMC-HV yog nws cov viscosity siab thaum yaj hauv dej. Viscosity yog ib qho kev ntsuas ntawm cov kua dej tsis kam ntws, thiab cov viscosity siab CMC tsim cov kuab tshuaj zoo li cov kua nplaum, txawm tias muaj tsawg. Cov cuab yeej no yog qhov tseem ceeb hauv kev siv roj av uas CMC-HV yog siv los hloov kho cov khoom rheological ntawm cov kua dej drilling thiab lwm cov qauv. Lub siab viscosity ua kom muaj txiaj ntsig zoo ntawm cov khib nyiab, lubrication zoo dua, thiab txhim kho kev ruaj ntseg ntawm cov av nkos drilling.
3. Dej Solubility
CMC-HV yog soluble hauv dej, uas yog ib qho tseem ceeb rau kev siv hauv kev lag luam roj av. Thaum ntxiv rau cov dej-raws li formulations, nws sai sai hydrates thiab dissolves, tsim ib homogeneous tov. Qhov kev solubility no yog qhov tseem ceeb rau kev npaj tau zoo thiab siv cov kua dej drilling, cov cement slurries, thiab cov kua ua tiav hauv kev ua haujlwm roj av.
4. Thermal stability
Kev ua haujlwm roj av feem ntau cuam tshuam nrog qhov kub thiab txias ib puag ncig, thiab thermal stability ntawm CMC-HV yog qhov tseem ceeb. Qib no ntawm CMC yog tsim los tswj nws cov viscosity thiab kev ua haujlwm nyob rau hauv qhov kub siab, feem ntau mus txog 150 ° C (302 ° F). Qhov kev ruaj ntseg thermal no ua kom muaj kev ua haujlwm zoo ib yam hauv kev kub siab drilling thiab cov txheej txheem ntau lawm, tiv thaiv kev degradation thiab poob ntawm cov khoom.
5. pH stability
CMC-HV muaj kev ruaj ntseg zoo thoob plaws pH ntau yam, feem ntau yog los ntawm 4 mus rau 11. Qhov pH ruaj khov no tseem ceeb vim tias cov kua dej drilling thiab lwm cov qauv siv roj av tuaj yeem ntsib ntau yam pH. Kev tuav cov viscosity thiab kev ua tau zoo hauv qhov sib txawv pH ib puag ncig ua kom muaj txiaj ntsig thiab kev ntseeg siab ntawm CMC-HV hauv ntau hom kev ua haujlwm.
6. Ntsev Tolerance
Hauv kev siv roj av, cov kua dej feem ntau tuaj yeem sib cuag nrog ntau yam ntsev thiab electrolytes. CMC-HV yog tsim los kom ua siab ntev ntawm qhov chaw ib puag ncig, tswj nws cov viscosity thiab kev ua haujlwm zoo thaum muaj ntsev. Qhov kev tiv thaiv ntsev no tau txais txiaj ntsig tshwj xeeb hauv kev lag luam offshore thiab lwm yam kev ua haujlwm uas muaj cov dej ntsev ntau.
7. Lim tswj
Ib qho ntawm cov haujlwm tseem ceeb ntawm CMC-HV hauv cov kua dej drilling yog tswj cov dej tsis zoo, tseem hu ua filtration control. Thaum siv cov av nkos, CMC-HV pab tsim lub ncuav mog qab zib nyias, impermeable lim rau ntawm phab ntsa ntawm lub qhov dej, tiv thaiv cov kua dej ntau dhau rau hauv kev tsim. Qhov kev tswj xyuas pom no yog qhov tseem ceeb rau kev tswj xyuas qhov chaw zoo thiab tiv thaiv kev puas tsuaj.
8. Biodegradability thiab Environmental Impact
Raws li kev xaiv ib puag ncig, CMC-HV yog biodegradable thiab muab tau los ntawm cov peev txheej txuas ntxiv mus. Nws biodegradability txhais tau hais tias nws tawg ib txwm dhau sijhawm, txo qhov cuam tshuam ib puag ncig piv rau hluavtaws polymers. Cov yam ntxwv no tseem ceeb zuj zus vim tias kev lag luam roj av tsom rau kev ruaj khov thiab txo qis ib puag ncig hneev taw.
9. Compatibility nrog lwm yam additives
CMC-HV feem ntau yog siv ua ke nrog lwm cov tshuaj ntxiv hauv cov kua dej drilling thiab lwm cov qauv roj av. Nws muaj kev sib raug zoo nrog ntau yam tshuaj, xws li xanthan gum, guar gum, thiab hluavtaws polymers, tso cai rau kev hloov kho cov kua dej kom tau raws li cov kev xav tau tshwj xeeb. Qhov no versatility txhim khu kev ua tau zoo thiab kev ua tau zoo ntawm cov dej drilling.
10. Lubricity
Hauv kev ua haujlwm drilling, txo kev sib txhuam ntawm txoj hlua laum thiab lub borehole yog qhov tseem ceeb rau kev ua haujlwm zoo drilling thiab txo qis hnav. CMC-HV txhawb nqa lubricity ntawm drilling kua, txo torque thiab luag, thiab txhim kho tag nrho cov efficiency ntawm cov txheej txheem drilling. Qhov no lubricity kuj pab nyob rau hauv ncua lub neej ntawm cov khoom siv drilling.
11. Kev ncua thiab kev ruaj ntseg
Lub peev xwm los tshem tawm thiab ruaj khov ntawm cov khoom hauv cov dej drilling yog qhov tseem ceeb rau kev tiv thaiv kev teeb tsa thiab ua kom cov khoom sib xws thoob plaws hauv cov kua dej. CMC-HV muab lub peev xwm ncua kev kawm zoo, khaws cov khoom hnyav, txiav, thiab lwm yam khoom sib npaug. Qhov kev ruaj ntseg no yog qhov tseem ceeb rau kev tswj xyuas cov dej zoo sib xws thiab tiv thaiv cov teeb meem kev ua haujlwm.
12. Daim ntawv thov-Cov txiaj ntsig tshwj xeeb
Drilling Fluids: Nyob rau hauv cov dej drilling, CMC-HV txhim khu viscosity, tswj cov kua dej, stabilizes lub borehole, thiab muab lubrication. Nws cov khoom ua kom muaj kev ua haujlwm zoo drilling, txo qhov cuam tshuam ib puag ncig, thiab txhim kho tag nrho kev ua haujlwm ntawm cov dej drilling.
Ua kom tiav cov kua dej: Hauv cov kua ua tiav, CMC-HV yog siv los tswj cov dej tsis zoo, ua kom lub qhov dej ruaj khov, thiab ua kom muaj kev ncaj ncees ntawm cov txheej txheem ua tiav. Nws thermal stability thiab compatibility nrog lwm yam additives ua rau nws haum rau siv nyob rau hauv high-temperature, high-pressure qhov.
Cementing Operations: Nyob rau hauv cov cement slurries, CMC-HV ua raws li cov viscosifier thiab cov kua dej tswj tus neeg sawv cev. Nws pab ua kom tiav cov khoom xav tau ntawm cov cement slurry, ua kom muaj kev tso npe thiab teeb tsa ntawm cov cement, thiab tiv thaiv kev tsiv teb tsaws ntawm cov roj thiab cov kua dej.
Petroleum qib siab viscosity CMC (CMC-HV) yog ntau yam thiab tseem ceeb polymer hauv kev lag luam roj av. Nws cov yam ntxwv tshwj xeeb, suav nrog cov viscosity siab, dej solubility, thermal thiab pH stability, ntsev kam rau ua, pom kev tswj, biodegradability, thiab compatibility nrog rau lwm yam additives, ua rau nws indispensable rau ntau yam kev siv roj av. Los ntawm cov dej drilling kom tiav thiab kev ua haujlwm cementing, CMC-HV txhim kho kev ua tau zoo, kev ua tau zoo, thiab ib puag ncig kev ruaj ntseg ntawm cov roj av extraction thiab cov txheej txheem ntau lawm. Raws li kev lag luam txuas ntxiv mus ntxiv, qhov kev thov rau kev ua haujlwm siab, cov khoom zoo ib puag ncig zoo li CMC-HV tsuas yog nce ntxiv, qhia txog nws lub luag haujlwm tseem ceeb hauv kev ua haujlwm roj av niaj hnub.
Post lub sij hawm: Jun-06-2024