HEC, lossis hydroxyethyl cellulose, yog tsis-ionic, dej-soluble polymer muab tau los ntawm cellulose. Nyob rau hauv cov ntsiab lus ntawm drilling, tshwj xeeb nyob rau hauv cov roj thiab roj nrhiav, hec ua lub luag haujlwm tseem ceeb hauv kev txhim kho cov kev ua tau zoo thiab ua haujlwm ntawm cov dej khov. Cov kua dej no, feem ntau hais txog cov av nkos, yog qhov tseem ceeb rau ntau yam haujlwm, suav nrog txias thiab lub siab txiav tawm, thiab ruaj khov kho kom zoo nkauj.
Tshuaj lom neeg muaj pes tsawg leeg thiab cov khoom ntawm HEC
Hydroxyethyl cellulose yog tsim los ntawm cov tshuaj tiv thaiv ntawm cov cellulose nrog ethylene oxide. Qhov tshwm sim yog lub polymer nrog rov ua dua cov koog uas suav nrog ob qho tib si hydrophilic (dej nyiam nyiam) thiab hydrophobic (dej-repelling) pawg. Qhov qauv tshwj xeeb no cuam tshuam ntau cov khoom tseem ceeb:
Dej solubility: hec
Viscosity makulation: nws tuaj yeem nce cov viscosity ntawm cov kua aqueous, ua rau nws yog ib tus neeg sawv cev ua kom zoo.
Stability: Hec cov kev daws teeb meem yog qhov ruaj khov tshaj li ntau hom (feem ntau PHIC 2) thiab tuaj yeem tiv taus ntau cov ntsev thiab elecolytes.
Zaj duab xis-tsim muaj peev xwm: nws siv cov ntshiab, tawv, thiab hloov cov yeeb yaj kiab hloov kho thaum ziab.
Cov xwm tsis-ionic: Ua tsis yog-ionic, HEC tsis cuam cuam tshuam nrog lwm cov ionic cov khoom siv hauv cov kua dej, kom muaj kev ruaj khov.
Lub luag haujlwm ntawm HEC hauv cov kua dej drilling
Drilling kua, lossis drilling av nkos, yog qhov tseem ceeb rau cov txheej txheem drilling. Lawv ua ob peb lub luag haujlwm tseem ceeb, thiab suav nrog hec tseem ua rau lawv cov kev ua tau zoo hauv cov hauv qab no:
1. Viscosity tswj
HEC feem ntau siv hauv kev ua kua kom txav kom tswj viscosity. Lub viscosity ntawm cov kua dej yog qhov tseem ceeb rau kev ncua thiab kev thauj ntawm cov kev txiav txiav kom nto. Los ntawm kev kho cov kev sib haum ntawm HEC, cov neeg ua haujlwm tuaj yeem ua cov kab viscosity ntawm cov kev xav tau ntawm kev ua haujlwm drilling. Qhov kev tswj hwm no yuav pab ua kom muaj kev ua tau zoo ntawm cov txheej txheem drilling thiab tiv thaiv cov teeb meem xws li sedimentation ntawm cuttings.
2. Kev tswj kev pom
Hauv kev ua haujlwm, pom kev hais txog cov txheej txheem uas cov kua uas ua kua ntawm cov kua dej ua kom muaj sia, tawm hauv qab lub tshuab lim. Cov lim lim dej ua ke minimizes qhov kev poob ntawm cov kua dej thiab ruaj khov rau qhov chaw nyob. Hec pab rau hauv txo cov nqi ua kom tiav los ntawm kev tsim cov khoom noj me me uas muaj cov hmoov av loj heev, uas tiv thaiv cov kua dej ntau dhau thiab ua rau muaj kev tsim.
3. Lubrication
Hi pab txhawb rau lubricating cov khoom ntawm cov kua dej drilling. Lubrication zoo txo kev sib txhuam ntawm cov hlua laum thiab qhov chaw nkaum, uas txo qis ntawm cov khoom siv drilling thiab tiv thaiv cov yeeb nkab yeeb nkab. Lubrication no tshwj xeeb yog tau txais txiaj ntsig zoo rau kev hloov pauv thiab kab rov tav uas tau sib hu ntawm cov hlua laum thiab qhov chaw nkaum yog cov lus tshaj tawm ntau dua.
4. Stabilization ntawm HallBore
Tus qauv kev cai ntawm qhov chaw nkaum yog qhov tseem ceeb rau kev nyab xeeb thiab kev ua haujlwm ua haujlwm. HEC pab ruaj khov kho kom zoo los ntawm kev txo qhov kev txeeb chaw rau ntawm cov kua dej rau hauv kev tsim, yog li txo qis kev pheej hmoo ntawm kev pheej hmoo ntawm kev sib tsoo ntawm kev sib tsoo. Nws zaj duab xis-ua lub peev xwm kuj pab cuam hauv kev sib khi me me thiab cov hws nyob rau hauv kev tsim, txuas ntxiv ua rau muaj kev ruaj ntseg kom ruaj khov.
5. Ib puag ncig thiab kev txiav txim siab nyab xeeb
HEC yog cov tsis muaj tshuaj lom thiab biodegradable polymer, ua rau nws ib puag ncig ua phooj ywg sib piv rau qee lwm cov dej lim dej. Nws siv hauv kev ua haujlwm drilling pab hauv kev txo qhov ib puag ncig hneev, kom muaj kev nyab xeeb thiab kev nyab xeeb dua kev nyab xeeb.
Hom thiab qib ntawm HEC siv hauv kev khiav
Muaj ntau qib ntawm HEC muaj, txhua qhov kev txiav tawm rau cov ntawv thov tshwj xeeb thiab kev ua tau zoo. Kev xaiv ntawm qib HEC tsim nyog nyob ntawm cov yam uas xav tau xws li xav tau viscosity, kub ruaj khov, thiab kev siv drilling. Feem ntau, HEC yog categorized raws nws cov molecular hnyav thiab qib ntawm cov pab pawg hydroxyl hauv cellulose tau hloov nrog hydroxyethyl pawg).
Qib siab viscosity: Siv hauv cov ntawv thov uas yuav tsum tau ua viscosity li.
Nruab Nrab Viscosity Qib: Muab kev sib npaug ntawm viscosity thiab yooj yim ntawm kev tuav.
Qib viscosity tsawg kawg: Qhov tsim nyog rau cov xwm txheej uas muaj viscosity miscosity yog xav tau.
Cov Tswv Yim Thov thiab Kev Coj Ua Zoo
Daim ntawv thov ntawm HEC hauv cov dej ua haujlwm cuam tshuam nrog kev saib xyuas ntawm cov kev xav ntawm kev pom zoo, cov txheej txheem sib xyaw, thiab kev sib xyaw nrog lwm cov kua dej. Qee cov kev coj ua zoo tshaj plaws muaj:
Kev sib xyaw ua ke kom raug: HEC yuav tsum maj mam ntxiv rau cov kua thaum txuas ntxiv kom tiv thaiv cov lump tsim thiab xyuas kom meej.
Cov kev tswj hwm kev tswj hwm: kev xav tau ntawm HEC yuav tsum tau ua kom zoo rau ua kom tiav cov khoom uas xav tau yam tsis muaj cov teeb meem xws li ntau dhau ntawm cov khoom siv tawm.
Kev ntsuas kev sib cav: ua ntej ntxiv HEC rau cov kua dej, nws yog qhov tseem ceeb kom ntsuas nws cov kev sib ntxiv nrog rau lwm cov kev tsis txaus siab los tiv thaiv cov tshuaj ntxiv los tiv thaiv cov tsis muaj kev cuam tshuam.
Cov kev cov nyom thiab cov kev daws teeb meem
Thaum HEEC muaj cov txiaj ntsig ntau ntau, muaj qee cov kev cov kev sib tw nrog nws siv hauv cov kua dej drilling:
Qhov kub siab txog qhov kub: HEC lub viscosity tuaj yeem cuam tshuam los ntawm qhov kub hloov. Kev ntsuas kub siab tuaj yeem txo qhov viscosity ntawm HEC kev daws teeb meem, uas yuav tsum tau siv cov qhab nia kub lossis cov kev sib ntxiv ntxiv.
Shear degradation: HEC tuaj yeem yeb tuaj yeem yeb muaj kev cuam tshuam tsis txaus ntseeg siab, ua rau muaj kev tawm tsam ntawm viscosity. Siv cov qhab nia sib txawv-ruaj khov thiab cov qauv kev sib txuas lus zoo tuaj yeem txo qhov teeb meem no.
Tus nqi txiav txim siab: Hec tuaj yeem kim dua lwm yam ntxiv. Txawm li cas los xij, nws cov txiaj ntsig thiab cov txiaj ntsig ib puag ncig feem ntau tiv thaiv tus nqi.
Hydroxyethyl cellule (HEC) yog qhov tseem ceeb hauv cov kua dej niaj hnub, muab txo cov tshuaj tiv thaiv lub cev, thiab cov chaw ruaj khov kho. Nws qhov tsis muaj tshuaj lom thiab biodegradable xwm ua rau nws muaj kev xaiv tus phooj ywg ib puag ncig rau kev ua haujlwm drilling. Los ntawm kev nkag siab txog nws cov khoom, kev siv cov kev thov, thiab cov kev sib tw, cov kev tawm tsam tuaj yeem tsim kev nyab xeeb thiab kev nyab xeeb ntawm lawv cov haujlwm ua haujlwm.
Lub Sijhawm Post: Feb-18-2025