Drilling kua rau shale txheej tus neeg sawv cev
vim li cas xaiv peb
vim li cas thiaj xaiv peb cov khoom
Tus neeg saib xyuas txheej yog cov khoom dawb los yog hmoov.Cov txheej txheem yog ib lub siab molecular polymer tsim los ntawm copolymerization ntawm derivatives ntawm ntau pab pawg, uas yog ib tug siab molecular dej-soluble polymer.
polymer muaj hydrophilic pawg xws li anions, uas ua rau nws resistant rau kub thiab ntsev thaum inhibiting lub hydration ntawm shale.Soluble nyob rau hauv dej.Nws yog ib tug zoo txheej tus neeg saib xyuas rau drilling kua. dilution muaj peev xwm, txo qhov pom, thiab lub tsho loj dilling cuttings.Nws yog tsuas yog siv rau dispersing polymer dej-raws li drlling kua nyob rau hauv uas tsis muaj cov khoom.
Lub cev tshuaj tsim nyogrties ua
|
Yam khoom |
Index cim |
|
cov dej |
Tsawg dua los yog sib npaug rau 9.0 |
|
Fineness(sieve qhov C 0.900mm residue) |
Tsawg dua los yog sib npaug rau 15.0 |
|
Pom tseeb viscosity (1% aqueous tov |
Ntau tshaj los yog sib npaug rau 30 |
|
Tus nqi PH |
7.5-9.0 |
Kev ua tau zoo index ntawm drilling kua dej
|
Yam khoom |
Pom meej visoosity MPa, s |
Yas viscosity MPa, s |
Fitration poob MI |
|
|
4% bentonite slurry |
Cov dej tshiab yog slurry |
8-10 |
3-5 |
22-26 |
|
Ntxiv 2.0%g/L qauv rau cov dej tshiab slurry |
Ntau dua lossis sib npaug li 25 |
Ntau dua lossis sib npaug li 8 |
Tsawg dua los yog sib npaug li 15 |
|
|
15% bentonite composite av nkos |
Base slury |
4-6 |
2-4 |
52-58 |
|
Ntxiv 7.0%g/l qauv tothebase slurry |
Ntau dua lossis sib npaug li 15 |
Ntau tshaj los yog sib npaug rau 10 |
Tsawg dua los yog sib npaug li 10 |
|
Inhibiting bentonite dispersion index ua
|
Yam khoom |
Nce tus nqi ntawm pom meej visoosity tom qab kub rolling ntawm 160 degree |
|
Base slurry +20bentonite |
450-700 |
|
Base slurry + qauv+20g bentonite |
Tsawg dua los yog sib npaug li 250 |
Kev sib tw kom zoo dua
Lub tuam txhab tau ua qhov kev sib tw kom zoo dua los txheeb xyuas nws qhov zoo thiab qhov tsis muaj zog piv rau nws cov neeg sib tw.
Shale coatings
Shale coatings yog ib qho ntawm cov khoom tseem ceeb ntawm drilling kua tshuab. Nws lub luag haujlwm tseem ceeb yog tsim cov txheej txheem ruaj khov thiab ruaj khov ntawm shale, uas txhim kho lubricity ntawm cov kua thiab pab tiv thaiv kom tsis txhob muaj qhov tsis zoo.
01
Classification ntawm Shale coatings
Shale xim feem ntau muab faib ua ob pawg: dej-soluble thiab roj-soluble. Cov dej-soluble agents feem ntau yog siv rau hauv cov dej-raws li drilling kua, thaum cov roj-soluble agents yog siv nyob rau hauv cov roj-raws li drilling kua. Qee yam ntawm cov khoom siv shale txheej feem ntau yog cov khoom siv polymeric xws li polyethylene glycol, polysaccharides, thiab polyacrylamide.
02
Polyethylene glycol thiab polysaccharides
Polyethylene glycol, tseem hu ua dej-soluble lubricant, muaj txiaj ntsig zoo hauv kev tsim cov txheej txheem tiv thaiv ntawm qhov chaw ntawm shale. Lawv kuj paub txog lawv cov thermal stability zoo heev thiab kev sib raug zoo nrog rau lwm cov kua dej ntxiv. Polysaccharides, ntawm qhov tod tes, yog ntuj polymers pom nyob rau hauv cov nroj tsuag thiab cov kab mob secretions.
03
Polyacrylamide
Polyacrylamide yog ib qho hluavtaws polymer uas tseem ua haujlwm zoo hauv txheej txheej shale thiab tiv thaiv qhov tsis zoo ntawm qhov tsis zoo. Lawv cov cuab yeej tshwj xeeb yog lawv qhov hnyav molecular, uas ua rau muaj zog adsorption ntawm qhov chaw ntawm shale.
04
Qhov zoo ntawm Shale txheej
Kev siv cov txheej txheem zoo shale tsis tsuas yog txhim kho kev ua haujlwm ntawm drilling thiab kev nyab xeeb, tab sis kuj txo cov nqi thiab tsis txhob muaj teeb meem ib puag ncig. Nws tiv thaiv cov kua dej tsis tsim nyog thiab pab tswj kev ncaj ncees ntawm lub qhov dej, uas txo qhov kev pheej hmoo ntawm ib puag ncig thiab kev puas tsuaj.
05
Daim ntawv thov
Cim npe nrov: Drilling kua rau shale txheej tus neeg saib xyuas, Tuam Tshoj drilling kua rau shale txheej tus neeg sawv cev manufacturers, lwm tus neeg, Hoobkas
