Polyanionic cellulose (PAC) feem ntau yog siv los ua cov kua dej poob, viscosity enhancer thiab rheological regulator hauv cov kua dej.Daim ntawv no piav qhia luv luv piav qhia txog lub ntsiab ntawm lub cev thiab tshuaj indexes ntawm PAC, xws li viscosity, rheology, hloov uniformity, purity thiab ntsev viscosity piv, nrog rau daim ntawv thov indexes hauv drilling kua.
Cov qauv molecular tshwj xeeb ntawm PAC ua rau nws pom kev ua haujlwm zoo hauv cov dej tshiab, dej ntsev, dej hiav txwv thiab dej ntsev.Thaum siv los ua cov lim dej hauv cov dej hauv cov dej drilling, PAC muaj peev xwm tswj tau cov dej tsis zoo, thiab cov av nkos tsim yog nyias thiab tawv.Raws li viscosifier, nws tuaj yeem txhim kho qhov pom tseeb viscosity, yas viscosity thiab dynamic shear quab yuam ntawm drilling kua, thiab txhim kho thiab tswj cov rheology ntawm av nkos.Cov khoom siv no muaj feem cuam tshuam nrog lub cev thiab tshuaj indexes ntawm lawv cov khoom.
1. PAC viscosity thiab nws daim ntawv thov nyob rau hauv drilling kua
PAC viscosity yog tus yam ntxwv ntawm cov tshuaj colloidal tsim tom qab yaj hauv dej.Tus cwj pwm rheological ntawm PAC cov tshuaj muaj qhov cuam tshuam tseem ceeb ntawm nws daim ntawv thov.Lub viscosity ntawm PAC muaj feem xyuam rau cov degree ntawm polymerization, kua concentration thiab kub.Feem ntau hais lus, qhov siab dua ntawm polymerization, qhov siab dua qhov viscosity;Lub viscosity nce nrog qhov nce ntawm PAC concentration;Cov tshuaj viscosity txo nrog qhov nce ntawm qhov kub thiab txias.NDJ-79 los yog Brookfield viscometer feem ntau yog siv los ntsuam xyuas cov viscosity hauv lub cev thiab tshuaj indexes ntawm PAC cov khoom.Lub viscosity ntawm PAC cov khoom yog tswj raws li daim ntawv thov.Thaum PAC siv los ua tackifier lossis rheological regulator, siab viscosity PAC feem ntau yuav tsum tau (cov qauv khoom feem ntau yog pac-hv, pac-r, thiab lwm yam).Thaum PAC feem ntau yog siv los ua cov kua dej poob qis thiab tsis ua kom cov viscosity ntawm cov dej drilling los yog hloov cov rheology ntawm cov dej drilling hauv kev siv, cov khoom uas tsis muaj viscosity PAC yuav tsum tau (cov khoom qauv feem ntau yog pac-lv thiab pac-l).
Hauv kev siv tswv yim, rheology ntawm drilling kua muaj feem xyuam rau: (1) lub peev xwm ntawm drilling kua nqa drilling cuttings thiab ntxuav lub qhov dej;(2) Levitation zog;(3) Stabilizing nyhuv ntawm ncej ncej;(4) Optimization tsim ntawm drilling tsis.Lub rheology ntawm drilling kua feem ntau yog kuaj los ntawm 6-ceev viscometer rotary: 600 rpm, 300 rpm, 200 rpm, 100 rpm thiab 6 rpm.3 RPM nyeem ntawv yog siv los xam qhov pom tseeb viscosity, yas viscosity, dynamic shear force thiab zoo li qub shear force, uas muaj kev cuam tshuam cov rheology ntawm PAC nyob rau hauv drilling kua.Nyob rau hauv tib rooj plaub, qhov siab dua qhov viscosity ntawm PAC, qhov siab dua qhov pom tseeb viscosity thiab yas viscosity, thiab qhov ntau dua qhov dynamic shear force thiab static shear force.
Tsis tas li ntawd, muaj ntau ntau yam dej-raws li drilling kua (xws li dej tshiab drilling kua, tshuaj kho mob drilling kua, calcium kho drilling kua, saline drilling kua, seawater drilling kua, thiab lwm yam), yog li cov rheology ntawm PAC sib txawv drilling kua tshuab yog txawv.Rau qhov tshwj xeeb drilling kua tshuab, tej zaum yuav muaj qhov sib txawv loj hauv kev ntsuam xyuas qhov cuam tshuam ntawm cov kua dej drilling tsuas yog los ntawm viscosity Performance index ntawm PAC.Piv txwv li, nyob rau hauv lub seawater drilling kua system, vim muaj ntsev cov ntsiab lus, txawm hais tias cov khoom muaj viscosity siab, qhov qis ntawm kev hloov ntawm cov khoom yuav ua rau cov ntsev tsawg ntawm cov khoom, uas ua rau cov neeg pluag viscosity nce cov nyhuv. ntawm cov khoom nyob rau hauv tus txheej txheem ntawm kev siv, ua rau tsis tshua muaj viscosity, tsis tshua muaj yas viscosity thiab tsis tshua muaj zog shear quab yuam ntawm cov drilling kua, uas ua rau cov tsis muaj peev xwm ntawm cov dej drilling los nqa drilling cuttings, uas tej zaum yuav ua rau sticking loj. rooj plaub.
2.Substitution degree thiab uniformity ntawm PAC thiab nws daim ntawv thov kev ua tau zoo nyob rau hauv drilling kua
Qhov kev hloov pauv ntawm PAC cov khoom feem ntau yog ntau dua lossis sib npaug rau 0.9.Txawm li cas los xij, vim qhov kev xav tau sib txawv ntawm ntau lub tuam txhab, qhov hloov pauv ntawm PAC cov khoom sib txawv.Nyob rau hauv xyoo tas los no, cov tuam txhab kev pabcuam roj tau txuas ntxiv txhim kho daim ntawv thov kev ua haujlwm ntawm cov khoom siv PAC, thiab qhov kev thov rau PAC cov khoom uas muaj kev hloov pauv tau nce ntxiv.
Kev hloov pauv qib thiab kev tsis sib xws ntawm PAC muaj feem cuam tshuam nrog cov ntsev viscosity piv, ntsev tsis kam thiab pom qhov poob ntawm cov khoom.Feem ntau, qhov siab dua qhov kev hloov pauv ntawm PAC, qhov zoo dua qhov hloov pauv sib xws, thiab qhov zoo dua cov ntsev viscosity piv, ntsev kuj thiab pom ntawm cov khoom.
Thaum PAC yaj nyob rau hauv muaj zog electrolyte inorganic ntsev tov, viscosity ntawm cov tshuaj yuav txo, uas ua rau lub thiaj li hu ua ntsev nyhuv.Qhov zoo ions ionized los ntawm ntsev thiab - coh2coo - Qhov kev txiav txim ntawm H2O anion pawg txo (los yog txawm tshem tawm) homoelectricity ntawm sab saw ntawm PAC molecule.Vim tsis txaus electrostatic repulsion quab yuam, PAC molecular saw curls thiab deforms, thiab ib co hydrogen bonds ntawm molecular chains tawg, uas rhuav tshem cov thawj spatial qauv thiab tshwj xeeb txo cov viscosity ntawm dej.
Cov ntsev tsis kam ntawm PAC feem ntau yog ntsuas los ntawm ntsev viscosity ratio (SVR).Thaum SVR tus nqi siab, PAC qhia kev ruaj ntseg zoo.Feem ntau, qhov siab dua qhov kev hloov pauv thiab qhov zoo dua qhov sib xws ntawm kev hloov pauv, qhov SVR tus nqi siab dua.
Thaum PAC siv los ua cov lim dej txo qis, nws tuaj yeem ionize rau hauv cov saw ntev ntev ntau yam anions hauv cov kua dej drilling.Cov pab pawg hydroxyl thiab ether oxygen nyob rau hauv nws cov saw molecular tsim hydrogen bonds nrog oxygen nyob rau saum npoo ntawm viscosity hais los yog tsim kev sib koom tes bonds nrog Al3 + ntawm daim ntawv cog lus breaking ntug ntawm av nplaum hais, kom PAC yuav adsorbed ntawm av nplaum;Lub hydration ntawm ntau pawg sodium carboxylate thickens lub hydration zaj duab xis nyob rau saum npoo ntawm av nplaum hais, tiv thaiv cov aggregation ntawm av nplaum hais rau hauv loj hais vim yog kev sib tsoo (kav tiv thaiv), thiab ntau nplua av nplaum hais yuav adsorbed ntawm ib tug molecular saw ntawm PAC ntawm tib lub sijhawm los tsim cov qauv sib xyaw ua ke npog tag nrho cov kab ke, txhawm rau txhim kho kev sib sau ua ke ntawm viscosity hais, tiv thaiv cov ntsiab lus ntawm cov khoom hauv cov dej drilling thiab tsim cov av nkos ncuav mog qab zib, Txo pom.Qhov siab dua qhov kev hloov pauv ntawm PAC cov khoom, cov ntsiab lus ntawm sodium carboxylate ntau dua, qhov zoo dua qhov kev hloov pauv, thiab qhov sib txawv ntawm cov hydration zaj duab xis ntau dua, uas ua rau muaj zog gel tiv thaiv cov nyhuv ntawm PAC hauv cov dej drilling, yog li ntau dua. pom tseeb cov nyhuv ntawm cov kua dej txo.
3. Purity ntawm PAC thiab nws daim ntawv thov nyob rau hauv drilling kua
Yog tias cov kua dej sib txawv sib txawv, qhov ntau npaum li cas ntawm cov kua dej drilling thiab tus neeg saib xyuas kev kho mob sib txawv, yog li qhov ntau npaum li cas ntawm PAC nyob rau hauv ntau qhov sib txawv drilling kua tshuab yuav txawv.Yog tias qhov ntau npaum li cas ntawm PAC hauv cov kua dej drilling tau teev tseg thiab cov kua dej drilling muaj qhov zoo rheology thiab pom kev txo qis, nws tuaj yeem ua tiav los ntawm kev kho qhov purity.
Nyob rau tib lub sijhawm, qhov siab dua ntawm PAC, qhov zoo ntawm cov khoom ua haujlwm.Txawm li cas los xij, qhov purity ntawm PAC nrog cov khoom lag luam zoo tsis tas yuav siab.Qhov sib npaug ntawm cov khoom ua tau zoo thiab purity yuav tsum tau txiav txim siab raws li qhov xwm txheej tiag tiag.
4. Daim ntawv thov kev ua tau zoo ntawm PAC antibacterial thiab kev tiv thaiv ib puag ncig hauv cov dej drilling
Raws li qee qhov xwm txheej, qee cov kab mob yuav ua rau PAC lwj, tshwj xeeb tshaj yog nyob rau hauv kev ua ntawm cellulase thiab ncov amylase, ua rau tawg ntawm PAC cov saw tseem ceeb thiab tsim kom txo cov suab thaj, qib ntawm polymerization txo, thiab viscosity ntawm cov tshuaj txo. .Lub peev xwm tiv thaiv enzyme ntawm PAC feem ntau yog nyob ntawm qhov hloov pauv molecular uniformity thiab qib ntawm kev hloov pauv.PAC nrog kev hloov pauv zoo sib xws thiab qib siab ntawm kev hloov pauv tau zoo dua los tiv thaiv enzyme kev ua haujlwm.Qhov no yog vim hais tias sab saw txuas los ntawm cov qabzib residues tuaj yeem tiv thaiv enzyme decomposition.
Kev hloov pauv qib ntawm PAC yog qhov siab, yog li cov khoom muaj kev ua haujlwm zoo ntawm cov kab mob thiab yuav tsis tsim cov ntxhiab tsw ntxhiab vim fermentation hauv kev siv tiag tiag, yog li tsis tas yuav ntxiv cov tshuaj tshwj xeeb, uas yog qhov zoo rau kev tsim kho ntawm qhov chaw.
Vim tias PAC tsis muaj tshuaj lom thiab tsis muaj mob, nws tsis muaj kuab paug rau ib puag ncig.Tsis tas li ntawd, nws tuaj yeem decomposed nyob rau hauv tej yam kev mob microbial.Yog li ntawd, nws yog qhov yooj yim los kho PAC hauv cov dej khib nyiab pov tseg, thiab nws tsis muaj teeb meem rau ib puag ncig tom qab kev kho mob.Yog li, PAC yog ib qho kev tiv thaiv ib puag ncig zoo drilling kua dej ntxiv.
Post lub sij hawm: May-18-2021