Polyanionic cellulose (PAC) yog cov dej-soluble polymer uas feem ntau siv hauv kev lag luam roj thiab roj ua cov kua dej ntxiv.PAC yog ib qho derivative ntawm cellulose, uas yog lub ntsiab structural tivthaiv ntawm cov nroj tsuag cell phab ntsa.PAC muaj txiaj ntsig zoo hauv kev txhim kho cov khoom rheological ntawm cov kua dej drilling, xws li viscosity, kua tsis tswj, thiab cov khoom raug ncua.Kab lus no yuav tham txog cov khoom, kev siv, thiab cov txiaj ntsig ntawm PAC hauv roj av drilling kua.

Cov khoom ntawm Polyanionic Cellulose

PAC yog cov dej-soluble polymer uas tau los ntawm cellulose.Nws yog ib qho hnyav molecular hnyav uas muaj carboxymethyl thiab hydroxyl pawg.Qhov degree ntawm kev hloov pauv (DS) ntawm PAC yog hais txog qhov nruab nrab ntawm cov carboxymethyl pawg ib chav tsev anhydroglucose ntawm cellulose qaum.Tus nqi DS yog qhov tseem ceeb uas cuam tshuam rau cov khoom ntawm PAC, xws li nws cov solubility, viscosity, thiab thermal stability.

PAC muaj cov qauv tshwj xeeb uas tso cai rau nws cuam tshuam nrog cov dej molecules thiab lwm yam polymers hauv cov dej drilling.PAC molecules tsim ib tug peb-dimensional network ntawm hydrogen bonds thiab electrostatic cuam tshuam nrog dej molecules thiab lwm yam polymeric additives, xws li xanthan gum los yog guar gum.Cov qauv network no txhim kho cov viscosity thiab shear-thinning tus cwj pwm ntawm cov dej drilling, uas yog cov khoom tseem ceeb rau kev ua haujlwm zoo drilling.

Kev siv ntawm Polyanionic Cellulose

PAC yog ntau yam polymer uas tuaj yeem siv rau hauv ntau lub tshuab ua kua dej, xws li cov av nkos, roj av nkos, thiab cov av nkos hluavtaws.PAC feem ntau yog siv rau hauv cov av nkos vim nws cov dej solubility zoo heev thiab kev sib raug zoo nrog lwm cov additives.PAC tau ntxiv rau cov kua dej drilling ntawm qhov ntau ntawm 0.1% mus rau 1.0% los ntawm qhov hnyav, nyob ntawm qhov tshwj xeeb drilling thiab lub hom phiaj.

PAC yog siv rau hauv cov dej drilling rau ntau daim ntawv thov, suav nrog:

1. Viscosification: PAC ua kom cov viscosity ntawm cov dej drilling, uas pab tshem tawm thiab thauj cov txiav thiab lwm cov khib nyiab tawm ntawm qhov borehole.PAC kuj tseem pab tswj kom muaj kev ncaj ncees ntawm lub qhov dej los ntawm kev tiv thaiv cov dej poob rau hauv cov txheej txheem permeable.
2. Kev tswj cov dej tsis zoo: PAC ua raws li tus neeg saib xyuas cov dej poob los ntawm kev tsim cov ncuav mog qab zib nyias, tsis muaj dej tsis zoo ntawm phab ntsa borehole.Lub ncuav mog qab zib lim no tiv thaiv qhov poob ntawm cov dej drilling rau hauv qhov tsim, uas tuaj yeem ua rau muaj kev puas tsuaj thiab txo cov kev ua haujlwm ntawm kev ua haujlwm drilling.
3. Shale inhibition: PAC muaj cov qauv tshwj xeeb uas tso cai rau nws los nqus rau hauv av nplaum ntxhia thiab tsim cov shale.Qhov no adsorption txo qhov o thiab dispersion ntawm shale formations, uas tuaj yeem ua rau muaj kev ruaj ntseg zoo thiab lwm yam teeb meem drilling.

Cov txiaj ntsig ntawm Polyanionic Cellulose

PAC muab ntau yam txiaj ntsig rau kev ua haujlwm drilling, suav nrog:

1. Txhim kho kev ua haujlwm zoo dua: PAC txhim kho cov khoom rheological ntawm cov kua dej drilling, xws li viscosity thiab kua tsis tswj.Qhov no txhim kho qhov ua tau zoo ntawm kev ua haujlwm drilling los ntawm kev txo lub sijhawm thiab tus nqi yuav tsum tau siv los xyaum lub qhov dej.
2. Kev tiv thaiv kev tsim tawm: PAC pab tswj kev ncaj ncees ntawm lub qhov dej los ntawm kev tiv thaiv cov dej tsis zoo thiab txo qis tsim kev puas tsuaj.Qhov no tiv thaiv kev tsim thiab txo qhov kev pheej hmoo ntawm qhov tsis zoo ntawm qhov dej thiab lwm yam teeb meem drilling.
3. Environmental compatibility: PAC yog cov dej-soluble polymer uas yog biodegradable thiab ib puag ncig sib xws.Qhov no ua rau nws yog ib qho kev nyiam ntxiv rau cov kua dej hauv qhov chaw rhiab heev.

Xaus

Polyanionic cellulose yog ib qho khoom siv zoo heev hauv cov roj av drilling kua vim nws cov khoom tshwj xeeb thiab ntau yam kev siv.PAC txhim kho cov khoom rheological ntawm cov kua dej drilling, txhim kho kev ua haujlwm zoo, thiab tiv thaiv kev tsim los ntawm kev puas tsuaj.PAC kuj yog ib puag ncig sib xws thiab nyiam nyob rau hauv qhov chaw rhiab heev.Kev siv PAC hauv cov dej drilling yuav tsum tau nce ntxiv rau yav tom ntej raws li kev lag luam roj thiab roj txuas ntxiv mus nrhiav cov thev naus laus zis tshiab thiab cov txheej txheem los ua kom ntau lawm thiab txo cov nqi.