Polyanionic cellulose (PAC) yog dej-soluble polymer dav siv nyob rau hauv roj av kev lag luam raws li ib tug drilling kua additive. Nws yog polyanionic derivative ntawm cellulose, synthesized los ntawm tshuaj hloov kho cellulose nrog carboxymethyl. PAC muaj cov khoom zoo heev xws li dej solubility, thermal stability, thiab hydrolysis tsis kam. Cov khoom no ua rau PAC qhov zoo tshaj plaws additive rau drilling kua tshuab hauv roj av tshawb nrhiav thiab tsim khoom.
Daim ntawv thov ntawm PAC hauv cov roj drilling feem ntau yog vim nws lub peev xwm los tswj cov viscosity thiab pom cov khoom ntawm cov kua dej drilling. Kev tswj viscosity yog qhov tseem ceeb hauv kev ua haujlwm drilling vim nws cuam tshuam rau kev ua haujlwm drilling thiab kev nyab xeeb. Kev siv PAC pab tswj cov viscosity ntawm cov dej drilling, uas yog qhov tseem ceeb heev rau kev tswj xyuas cov khoom ntws ntawm cov kua dej drilling. Lub viscosity ntawm cov dej drilling yog tswj los ntawm cov concentration ntawm PAC siv thiab qhov hnyav molecular ntawm cov polymer. PAC molecule ua raws li lub thickener, los yog viscosifier, vim hais tias nws tsub kom lub viscosity ntawm cov dej drilling. Lub viscosity ntawm drilling kua nyob ntawm PAC concentration, degree ntawm kev hloov thiab molecular hnyav.
Lim tswj yog lwm qhov tseem ceeb hauv kev ua haujlwm drilling. Kev ua haujlwm pom muaj feem cuam tshuam nrog tus nqi ntawm cov dej nkag mus rau phab ntsa zoo thaum lub sijhawm drilling. Kev siv PAC pab txhim kho kev tswj xyuas thiab txo cov kua dej nkag. Cov dej nkag tuaj yeem ua rau poob ntawm kev ncig, tsim kev puas tsuaj thiab txo qhov kev ua haujlwm drilling. Ntxiv PAC rau cov kua dej drilling tsim cov qauv zoo li gel uas ua raws li lub ncuav mog qab zib lim rau ntawm phab ntsa zoo. Lub ncuav mog qab zib lim no txo cov kua dej nkag, pab tswj kev ncaj ncees ntawm lub qhov dej thiab txo qhov kev pheej hmoo ntawm kev tsim kev puas tsuaj.
PAC kuj tseem siv los txhim kho cov shale suppression zog ntawm cov dej drilling. Shale suppression yog lub peev xwm ntawm cov dej drilling los tiv thaiv reactive shale los ntawm hydrating thiab o. Kev ywg dej thiab nthuav dav ntawm cov reactive shale tuaj yeem ua rau muaj teeb meem xws li kev tsis sib haum xeeb, cov yeeb nkab daig, thiab ploj mus. Ntxiv PAC rau cov kua dej drilling tsim ib qho kev thaiv ntawm cov shale thiab cov kua dej drilling. Qhov kev thaiv no pab tswj kev ncaj ncees ntawm phab ntsa dej los ntawm kev txo cov dej thiab o ntawm cov shale.
Lwm daim ntawv thov ntawm PAC nyob rau hauv cov roj drilling yog raws li ib tug dej poob txo additive. Filtration poob yog hais txog qhov poob ntawm cov dej drilling nkag mus rau qhov tsim thaum lub sijhawm drilling. Qhov kev poob no tuaj yeem ua rau muaj kev puas tsuaj, poob ncig thiab txo qhov kev ua haujlwm drilling. Kev siv PAC pab txo cov kua dej los ntawm kev tsim cov ncuav mog qab zib lim ntawm cov phab ntsa zoo uas thaiv cov dej ntws mus rau hauv kev tsim. Txo cov kua dej tsis zoo pab tswj kev ua haujlwm zoo thiab txhim kho kev ua haujlwm drilling.
PAC kuj tseem siv tau los txhim kho qhov ruaj khov ntawm cov dej drilling. Wellbore stability yog hais txog lub peev xwm ntawm cov dej drilling kom muaj kev ruaj ntseg zoo thaum lub sij hawm drilling. Kev siv PAC pab txhim kho phab ntsa zoo los ntawm kev tsim cov ncuav mog qab zib lim rau ntawm phab ntsa dej. Lub ncuav mog qab zib lim no txo cov kua dej nkag mus rau hauv phab ntsa thiab txo qhov kev pheej hmoo ntawm qhov dej tsis ruaj khov.
Kev siv polyanionic cellulose hauv roj drilling muaj ntau yam txiaj ntsig. PAC yog siv los tswj cov viscosity thiab pom kev ua haujlwm ntawm cov kua dej drilling, txhim kho shale inhibition kev ua tau zoo, txo qis pom, thiab txhim kho kev ruaj ntseg zoo. Kev siv PAC hauv cov roj drilling pab ua kom muaj txiaj ntsig zoo thiab txo qhov kev pheej hmoo ntawm kev tsim kev puas tsuaj, kev ploj mus thiab kev nyab xeeb tsis ruaj khov. Yog li ntawd, kev siv PAC yog qhov tseem ceeb rau kev ua tiav ntawm cov roj drilling thiab kev tsim khoom.
Post lub sij hawm: Oct-08-2023