I-Hydroxyethyl cellulose (HEC) iyisengezo esivamile embonini yokumba uwoyela, lapho isebenza khona imisebenzi eyahlukahlukene ekwakhiweni koketshezi lokumba. Lezi zakhiwo, ezaziwa nangokuthi udaka lokumba, zidlala indima ebalulekile ekwenzeni lula inqubo yokumba ngokupholisa nokugcoba i-drill bit, ukuthwala izingcezu phezulu, nokunikeza ukuzinza e-wellbore. Nasi isifinyezo sezinhlelo zokusebenza, imisebenzi, kanye nokucatshangelwa kwe-HEC ekumba uwoyela:

1. Isingeniso ku-Hydroxyethyl Cellulose (HEC) ekubholeni uwoyela

1.1 Incazelo kanye nomthombo

I-Hydroxyethyl cellulose iyi-polymer ye-cellulose eguquliwe etholakala ngokuxuba i-cellulose ne-ethylene oxide. Ivame ukutholakala ku-pulp yokhuni noma ukotini futhi icutshungulwa ukuze kudalwe i-ejenti encibilikayo emanzini, eqinisa i-viscos.

1.2 I-ejenti Yokugoqa Ezintweni Zokubhoboza

I-HEC isetshenziswa ekubholeni uketshezi ukulungisa nokulawula ukujiya kwalo. Lokhu kubalulekile ekugcineni ingcindezi ye-hydraulic edingekayo emgodini womthombo kanye nokuqinisekisa ukuthi izingcezu zithuthwa kahle ziye phezulu.

2. Imisebenzi ye-Hydroxyethyl Cellulose ku-Oil Drilling Fluids

2.1 Ukulawula Ukugoba

I-HEC isebenza njengomuguquli we-rheology, ihlinzeka ngokulawula i-viscosity yoketshezi lokubhoboza. Ikhono lokulungisa i-viscosity libalulekile ekwenzeni ngcono izakhiwo zokugeleza koketshezi ngaphansi kwezimo ezahlukene zokubhoboza.

2.2 Ukumiswa Kwezicucu

Enqubweni yokubhoboza, kukhiqizwa izingcezu zamatshe, futhi kubalulekile ukumisa lezi zingcezu oketshezini lokubhoboza ukuze kube lula ukuzisusa emgodini womthombo. I-HEC iyasiza ekugcineni ukumiswa okuzinzile kwezingcezu.

2.3 Ukuhlanza Imigodi

Ukuhlanza imigodi ngempumelelo kubalulekile enkambisweni yokubhoboza. I-HEC inegalelo ekhonweni loketshezi lokuthwala nokuthutha izingcezu ezisikiwe ziye phezulu, ivimbele ukunqwabelana emgodini womthombo futhi ikhuthaze ukusebenza kahle kokubhoboza.

2.4 Ukuqina Kwezinga Lokushisa

I-HEC ibonisa ukuzinza okuhle kokushisa, okwenza ifaneleke ukusetshenziswa koketshezi lokubhoboza olungahlangabezana nobubanzi bokushisa ngesikhathi senqubo yokubhoboza.

3. Izicelo Ezintweni Zokubhoboza Amafutha

3.1 Uketshezi Lokubhoboza Olusekelwe Emanzini

I-HEC ivame ukusetshenziswa koketshezi lokubhoboza olusekelwe emanzini, oluhlinzeka ngokulawula ukujiya, ukumiswa kokusikwa, kanye nokuqina. Ithuthukisa ukusebenza okuphelele kodaka olusekelwe emanzini ezindaweni ezahlukene zokubhoboza.

3.2 Ukuvinjelwa kwe-Shale

I-HEC ingasiza ekuvimbeleni i-shale ngokwakha isithiyo esivikelayo ezindongeni ze-wellbor. Lokhu kusiza ukuvimbela ukuvuvukala nokuqhekeka kwezakhiwo ze-shale, okugcina ukuqina kwe-wellbor.

3.3 Ukulawulwa Kokuvuza Kokujikeleza Kwegazi

Emisebenzini yokubhoboza lapho ukulahlekelwa uketshezi ekwakhekeni kuyindaba ekhathazayo, i-HEC ingafakwa ekwakhiweni ukusiza ukulawula ukulahleka kokujikeleza kwegazi, ukuqinisekisa ukuthi uketshezi lokubhoboza luhlala emgodini womthombo.

4. Izinto okufanele uzicabangele kanye nezinyathelo zokuphepha

4.1 Ukugxila

Ukuhlushwa kwe-HEC koketshezi lokubhoboza kudinga ukulawulwa ngokucophelela ukuze kufezwe izakhiwo ezifiselekayo ze-rheological ngaphandle kokubangela ukuqina ngokweqile noma ukuphazamisa kabi ezinye izici zoketshezi.

4.2 Ukuhambisana

Ukuhambisana nezinye izithako zoketshezi lokubhoboza kanye nezingxenye kubalulekile. Kufanele kucatshangelwe ngokucophelela yonke indlela yokwakheka ukuze kuvinjelwe izinkinga ezifana nokugoba noma ukusebenza okuncishisiwe.

4.3 Ukulawulwa Kokuhlunga Uketshezi

Nakuba i-HEC ingaba negalelo ekulawuleni ukulahlekelwa uketshezi, ezinye izithasiselo zingadingeka ukuze kuxazululwe izinkinga ezithile zokulahlekelwa uketshezi nokugcina ukulawulwa kokuhlunga.

5. Isiphetho

I-Hydroxyethyl cellulose idlala indima ebalulekile emisebenzini yokumba uwoyela ngokufaka isandla ekusebenzeni kahle nasekuzinzeni koketshezi lokumba. Njenge-ejenti eqinisayo, isiza ukulawula izakhiwo zoketshezi, ukumisa ukusika, nokugcina ukuqina kwe-wellbore. Abenzi be-formula kudingeka bacabangele ngokucophelela ukuhlushwa, ukuhambisana, kanye nokwakheka okuphelele ukuqinisekisa ukuthi i-HEC ikhulisa izinzuzo zayo ekusetshenzisweni kokumba uwoyela.