Drilling fluids sun hada ne daga liquid systems wanda aka tsara don goyon bayan aikin drilling a cikin ayyukan deep foundation da geotechnical, gami da micropile installation, borehole drilling, da ground investigation. Waɗannan fluids sun hada ne daga aqueous ko synthetic solutions wanda aka ƙara additives wanda ke canza siffofin su na physical da chemical don biyan muhallin subsurface na musamman da buƙatun aikin. Tsarin na asali ya ƙunshi water ko mineral oil base, bentonite clay don viscosity da suspension, weighting agents kamar barite don density adjustment, da chemical additives wanda ke ƙara lubrication, rage filtration loss, da ƙara ƙarfin. Tsarin da aka tsara da kyau ya yi tasiri kan drilling efficiency, borehole integrity, da ƙarfin data na geotechnical investigation.
Partially hydrolyzed polyacrylamide (PHPA) shi ne synthetic linear polymer wanda ake amfani da shi a matsayin viscosity-building da rheology-controlling additive a cikin drilling fluids don deep foundation, geotechnical, da piling applications. PHPA polymers sun kasu kai tsakanin acrylamide units wanda aka hydrolyze zuwa carboxyl groups, wanda ya haifar da partially anionic polymer chain. Tsarin molecular ya PHPA ya sa ya iya bayar da viscosity control mai girma, shale stabilization, da fluid-loss reduction idan aka kwatanta da conventional additives kamar bentonite, wanda ya sa ya zama component mai mahimmanci a cikin high-performance drilling fluid systems don geological formations na musamman.
Biopolymers, musamman xanthan gum da guar gum, shi ne naturally derived polymer additives wanda ke aiki a matsayin controlling rheological da filtration properties na drilling fluids a lokacin deep foundation construction. Xanthan gum an samar da shi ta hanyar fermentation na Xanthomonas bacterium kuma ya kirkira long-chain polysaccharide molecules wanda ke bayar da viscosity da shear-thinning characteristics. Guar gum, wanda aka samo daga endosperm na guar plant seeds, ya bayar da fa'ida iri iri tare da distinct molecular chemistry. Kayan biyu suna aiki a matsayin thickening agents wanda ba su bukatar chemical synthesis ba, wanda ya sa su zama environmentally preferable alternatives zuwa synthetic polymers yayin da suke bayar da performance mai girma a cikin geotechnical applications daban-daban.
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