I-Hydroxyethyl cellulose ku-Drilling Fluid

I-Hydroxyethyl cellulose (HEC) i-polymer encibilika emanzini evame ukusetshenziswa njenge-viscosifier kuketshezi lokumba. Uketshezi lokumba, olwaziwa nangokuthi udaka lokumba, luyingxenye ebalulekile enqubweni yokumba esetshenziswa ekuhloleni uwoyela negesi, ukukhiqizwa kwamandla okushisa komhlaba kanye nokukhipha amaminerali. Kulesi sihloko, sizoxoxa ngokusetshenziswa okuhlukahlukene kwe-HEC kuketshezi lokumba.

I-Viscosity Control

Esinye sezicelo eziyinhloko ze-HEC ekugezeni uketshezi ukulawula i-viscosity yoketshezi. I-viscosity isho ukujiya noma ukumelana nokugeleza koketshezi. Inqubo yokubhoboza idinga uketshezi olukwazi ukugeleza kalula ku-drill bit futhi luthwale izingcezu zokubhoboza phezulu. Kodwa-ke, uma i-viscosity yoketshezi iphansi kakhulu, ngeke ikwazi ukuthwala ama-cuttings, futhi uma iphezulu kakhulu, kuyoba nzima ukupompa emgodini womthombo.

I-HEC iyi-viscosifier ephumelelayo ngoba ingakhuphula i-viscosity yoketshezi lokumba ngaphandle kokwandisa kakhulu ukuminyana. Lokhu kubalulekile ngoba uketshezi oluminyanisa kakhulu lungabangela umonakalo emgodini futhi lungabangela nokudilika komthombo. Ukwengeza, i-HEC iyasebenza ekugxiliseni okuphansi, okusiza ukunciphisa izindleko eziphelele zoketshezi lokumba.

Ukulawulwa Kokulahlekelwa Kwe-Fluid

Okunye ukusetshenziswa okubalulekile kwe-HEC kuketshezi lokumba ukulawulwa kokulahlekelwa uketshezi. Ukulahlekelwa uketshezi kubhekisela ekulahlekeni koketshezi ekwakhekeni ngesikhathi sokumba. Lokhu kungabangela ukuncishiswa kwevolumu yoketshezi lokumba, okungaholela ekuzinzeni okuncane komthombo kanye nokunciphisa ukusebenza kahle kokumba.

I-HEC iyi-ejenti ephumelelayo yokulawula ukulahlekelwa uketshezi ngoba ingakha ikhekhe lokuhlunga elincanyana, elingenakunyakaziswa ebusweni bokwakheka. Leli khekhe lesihlungi lisiza ukuvimbela uketshezi lokumba ukuthi lungangeni ekubunjweni, ukunciphisa ukulahlekelwa uketshezi kanye nokugcina ukuzinza kwe-wellbore.

Ukumiswa kanye nekhono lokuthwala

I-HEC iphinde isetshenziswe ekubholeni uketshezi njenge-ejenti yokumisa nokuthwala. Inqubo yokumba ihilela ukusetshenziswa kwezithasiselo ezihlukahlukene eziqinile, okuhlanganisa i-barite nezinye izinto zokulinganisa isisindo, ezifakwa oketshezini ukuze kwandiswe ukuminyana kwayo. I-HEC iphumelela ekumiseni lezi zithako eziqinile oketshezini futhi izivimbele ukuthi zingazinzi phansi komthombo.

Ngaphezu kwalokho, i-HEC ingakhuphula umthamo wokuthwala uketshezi lokumba. Lokhu kubhekisela enanini le-drill cuttings uketshezi olungakwazi ukuthwala phezulu. Uketshezi olunomthamo omkhulu wokuthwala lungasiza ekuthuthukiseni ukusebenza kahle kokumba futhi kwehlise ingcuphe yokungaqini kwe-wellbore.

Izinga lokushisa kanye ne-pH Ukuzinza

Uketshezi lokumba lungaphansi kwezimo ezihlukahlukene zemvelo, okuhlanganisa izinga lokushisa eliphezulu nezimo ezine-asidi. I-HEC iyakwazi ukugcina i-viscosity yayo nokuzinza kulezi zimo ezimbi kakhulu, iyenze ibe isithasiselo esisebenzayo sokumba uketshezi olusetshenziswa ezindaweni eziyinselele.

I-HEC iphinde ibe ne-pH ezinzile, okusho ukuthi ingagcina i-viscosity yayo nezinye izakhiwo emanzini anohlu olubanzi lwamanani e-pH. Lokhu kubalulekile ngoba i-pH yoketshezi lokumba ingahluka kakhulu kuye ngezimo ze-geological zomthombo.

Isiphetho

I-HEC iyisengezo esibalulekile kuketshezi lokumba ngenxa yekhono layo lokulawula i-viscosity, ukunciphisa ukulahlekelwa uketshezi, ukumisa okwesikhashana nokuthwala izithasiselo eziqinile, nokugcina ukuzinza ezindaweni eziyinselele.