Polyanionic cellulose (PAC) yog ib qho polymer uas yaj tau hauv dej uas siv dav hauv kev lag luam roj av ua cov kua ntxiv rau hauv qhov drilling. Nws yog ib qho polyanionic derivative ntawm cellulose, synthesized los ntawm kev hloov kho tshuaj ntawm cellulose nrog carboxymethyl. PAC muaj cov yam ntxwv zoo heev xws li solubility dej siab, thermal stability, thiab hydrolysis tsis kam. Cov yam ntxwv no ua rau PAC yog ib qho additive zoo tagnrho rau cov kua drilling hauv kev tshawb nrhiav roj av thiab kev tsim khoom.
Kev siv PAC hauv kev khawb roj feem ntau yog vim nws muaj peev xwm tswj tau qhov viscosity thiab cov khoom lim dej ntawm cov kua drilling. Kev tswj viscosity yog ib qho 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 qhov viscosity ntawm cov kua drilling, uas yog qhov tseem ceeb heev rau kev tswj cov khoom ntws ntawm cov kua drilling. Qhov viscosity ntawm cov kua drilling yog tswj los ntawm qhov concentration ntawm PAC siv thiab qhov hnyav molecular ntawm cov polymer. Lub molecule PAC ua haujlwm ua tus thickener, lossis viscosifier, vim nws ua rau kom qhov viscosity ntawm cov kua drilling nce ntxiv. Qhov viscosity ntawm cov kua drilling nyob ntawm PAC concentration, qib ntawm kev hloov pauv thiab qhov hnyav molecular.
Kev tswj kev lim dej yog lwm yam tseem ceeb hauv kev ua haujlwm drilling. Kev ua haujlwm ntawm kev lim dej yog cuam tshuam nrog qhov ceev uas cov kua dej nkag mus rau hauv phab ntsa qhov dej thaum lub sijhawm drilling. Kev siv PAC pab txhim kho kev tswj kev lim dej thiab txo cov kua dej nkag mus. Cov kua dej nkag mus tuaj yeem ua rau poob kev ncig, kev puas tsuaj rau cov qauv thiab txo qis kev ua haujlwm drilling. Ntxiv PAC rau cov kua dej drilling tsim cov qauv zoo li gel uas ua haujlwm ua lub ncuav mog qab zib lim dej ntawm phab ntsa qhov dej. Lub ncuav mog qab zib lim dej no txo cov kua dej nkag mus, pab tswj kev ncaj ncees ntawm lub qhov dej thiab txo qhov kev pheej hmoo ntawm kev puas tsuaj rau cov qauv.
PAC kuj tseem siv los txhim kho cov yam ntxwv ntawm kev tswj cov shale ntawm cov kua dej drilling. Kev tswj cov shale yog lub peev xwm ntawm cov kua dej drilling los tiv thaiv cov reactive shale los ntawm kev hydrating thiab o. Kev hydration thiab kev nthuav dav ntawm cov reactive shale tuaj yeem ua rau muaj teeb meem xws li qhov dej tsis ruaj khov, cov yeeb nkab daig, thiab poob kev ncig. 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 qhov dej los ntawm kev txo cov hydration thiab o ntawm cov shale.
Lwm daim ntawv thov ntawm PAC hauv kev khawb roj yog ua cov tshuaj ntxiv rau kev txo cov dej poob. Kev poob ntawm kev lim dej txhais tau tias kev poob ntawm cov kua dej khawb uas nkag mus rau hauv qhov chaw thaum lub sijhawm khawb. Qhov kev poob no tuaj yeem ua rau kev puas tsuaj ntawm qhov chaw, kev poob ntawm kev ncig thiab kev txo qis kev ua haujlwm ntawm kev khawb. Kev siv PAC pab txo cov kua dej poob los ntawm kev tsim cov ncuav mog qab zib lim dej ntawm phab ntsa qhov dej uas thaiv cov kua dej ntws mus rau hauv qhov chaw. Kev txo qis kev poob ntawm cov kua dej pab tswj kev ua haujlwm ntawm qhov dej thiab txhim kho kev ua haujlwm ntawm kev khawb.
PAC kuj tseem siv tau los txhim kho qhov ruaj khov ntawm cov kua dej hauv qhov dej. Qhov ruaj khov ntawm qhov dej yog hais txog lub peev xwm ntawm cov kua dej hauv qhov dej los tswj qhov ruaj khov ntawm qhov dej thaum lub sijhawm khawb. Kev siv PAC pab ua kom lub phab ntsa qhov dej ruaj khov los ntawm kev tsim lub ncuav mog qab zib lim dej ntawm phab ntsa qhov dej. Lub ncuav mog qab zib lim dej no txo cov kua dej nkag mus rau hauv phab ntsa thiab txo qhov kev pheej hmoo ntawm qhov tsis ruaj khov ntawm qhov dej.
Kev siv polyanionic cellulose hauv kev khawb roj muaj ntau yam txiaj ntsig. PAC yog siv los tswj qhov viscosity thiab kev ua haujlwm ntawm cov kua dej drilling, txhim kho kev ua haujlwm tiv thaiv shale, txo qhov kev poob ntawm kev lim dej, thiab txhim kho kev ruaj khov ntawm lub qhov dej. Kev siv PAC hauv kev khawb roj pab ua kom muaj kev ua haujlwm zoo dua thiab txo qhov kev pheej hmoo ntawm kev puas tsuaj ntawm cov qauv, kev poob kev ncig thiab kev tsis ruaj khov ntawm lub qhov dej. Yog li ntawd, kev siv PAC yog qhov tseem ceeb rau kev ua tiav ntawm kev khawb roj thiab kev tsim khoom.
Lub sijhawm tshaj tawm: Lub Kaum Hli-08-2023