I-Hydroxyethyl cellulose (HEC) iyisengezo esivamile embonini yokumba uwoyela, lapho isebenza khona imisebenzi ehlukahlukene ekwenziweni koketshezi lokumba. Lezi zakhi, ezaziwa nangokuthi ukubhola udaka, zidlala indima ebalulekile ekusizeni inqubo yokumba ngokupholisa nokugcoba i-drill bit, ukuthwala okusikiwe phezulu, nokunikeza ukuzinza emgodini womthombo. Nakhu okufingqiwe kwezicelo, imisebenzi, nokucatshangelwa kwe-HEC ekumba uwoyela:

1. Isingeniso se-Hydroxyethyl Cellulose (HEC) Ekubholeni Amafutha

1.1 Incazelo kanye Nomthombo

I-Hydroxyethyl cellulose iyi-polymer ye-cellulose eguquliwe etholakala ngokuphendula i-cellulose nge-ethylene oxide. Ngokuvamile itholakala ku-pulp yokhuni noma ukotini futhi icutshungulwa ukuze idale i-agent encibilikayo emanzini, i-viscosifying.

1.2 I-ejenti ye-Viscosifying ku-Drilling Fluids

I-HEC isetshenziselwa uketshezi lokumba ukulungisa nokulawula i-viscosity yabo. Lokhu kubalulekile ekugcineni umfutho we-hydraulic odingekayo emgodini womthombo kanye nokuqinisekisa ukuthi ukusikwa kuthuthelwa phezulu.

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

2.1 Ukulawulwa Kwe-Viscosity

I-HEC isebenza njenge-rheology modifier, inikeza ukulawula phezu kwe-viscosity yoketshezi lokumba. Ikhono lokulungisa i-viscosity libalulekile ekuthuthukiseni izakhiwo zokugeleza koketshezi ngaphansi kwezimo ezihlukahlukene zokumba.

2.2 Ukumiswa kokusika

Enqubweni yokumba, ama-rock cuttings ayakhiqizwa, futhi kubalulekile ukumisa lezi zicucu oketshezini lokumba ukuze kube lula ukususwa kwazo emthonjeni. I-HEC isiza ekugcineni ukumiswa okuzinzile kokusikwa.

2.3 Ukuhlanza Imigodi

Ukuhlanza imigodi ngendlela ephumelelayo kubalulekile enqubweni yokumba. I-HEC inesandla ekhonweni loketshezi lokuthwala kanye nokuthutha okusikiwe phezulu, kuvimbele ukunqwabelana emgodini womthombo futhi kukhuthaze imisebenzi yokumba ephumelelayo.

2.4 Ukuzinza Kwezinga Lokushisa

I-HEC ikhombisa ukuzinza okuhle kwezinga lokushisa, okuyenza ifanelekele ukusetshenziswa kuketshezi lokumba olungase luhlangabezane nezinhlobonhlobo zamazinga okushisa phakathi nenqubo yokumba.

3. Izicelo ku-Oil Drilling Fluids

3.1 Izinto Ezisetshenziswa Ngamanzi Zokumba

I-HEC ivame ukusetshenziswa kuketshezi lokumba olusekelwe emanzini, oluhlinzeka ngokulawula i-viscosity, ukumiswa kokusika, nokuzinza. Ithuthukisa ukusebenza okuphelele kodaka olusekelwe emanzini ezindaweni ezihlukahlukene zokumba.

3.2 Ukuvimbela i-Shale

I-HEC ingaba negalelo ekuvinjweni kwe-shale ngokwenza umgoqo ovikelayo ezindongeni zomthombo. Lokhu kusiza ukuvimbela ukuvuvukala nokuhlakazeka kokwakheka kwe-shale, ukugcina ukuzinza kwe-wellbore.

3.3 Ukulawulwa Kokujikeleza Okulahlekile

Emisebenzini yokumba lapho ukulahlekelwa uketshezi ekubunjweni kuwukukhathazeka khona, i-HEC ingafakwa ekwakhiweni ukuze isize ukulawula ukujikeleza okulahlekile, kuqinisekiswe ukuthi uketshezi lokumba luhlala emgodini womthombo.

4. Okucatshangelwayo Nezinyathelo Zokuqapha

4.1 Ukugxilisa ingqondo

Ukugxila kwe-HEC oketshezini lokumba kudinga ukulawulwa ngokucophelela ukuze kuzuzwe izici ezifiselekayo ze-rheological ngaphandle kokubangela ukujiya ngokweqile noma ukuba nomthelela omubi kwezinye izici zoketshezi.

4.2 Ukuhambisana

Ukuhambisana nezinye izithasiselo zamanzi okumba kanye nezingxenye kubalulekile. Ukucatshangelwa ngokucophelela kufanele kunikezwe konke ukubunjwa ukuze kuvinjwe izinkinga ezifana ne-flocculation noma ukusebenza okuncishisiwe.

4.3 Ukulawula Ukuhlunga Uketshezi

Nakuba i-HEC ingaba nomthelela ekulawuleni ukulahlekelwa kwamanzi, ezinye izithasiselo zingase zidingeke ukubhekana nezinkinga ezithile zokulahlekelwa uketshezi futhi kugcinwe ukulawulwa kokuhlunga.

5. Isiphetho

I-Hydroxyethyl cellulose idlala indima ebalulekile emisebenzini yokumba uwoyela ngokuba negalelo ekusebenzeni kahle nasekuzinzeni koketshezi lokumba. Njenge-ejenti ye-viscosifying, isiza ukulawula izakhiwo eziwuketshezi, ukumisa ukusikwa, nokugcina ukuzinza kwe-wellbore. Abaqulunqi badinga ukucabangela ngokucophelela ukugxilisa ingqondo, ukuhambisana, kanye nokwakheka kukonke ukuze baqinisekise ukuthi i-HEC ikhulisa izinzuzo zayo ezinhlelweni zokusebenza zokumba uwoyela.