Thaum drilling roj thiab roj qhov dej, khiav lub casing mus rau hauv qab ntawm lub qhov thiab tau txais cov cement zoo yog qhov tseem ceeb. Casing yog cov tubing uas khiav hauv lub qhov dej los tiv thaiv lub qhov dej los ntawm kev sib tsoo thiab cais thaj chaw tsim tawm los ntawm lwm qhov tsim. Casing yuav tsum yog qhov nruab nrab zoo kawg nkaus thiab ruaj khov rau hauv qhov chaw kom ntseeg tau tias kev ua haujlwm zoo thiab kev nyab xeeb. Qhov no yog qhov twgcentralizerstuaj ua si.
A centralizersyog ib qho cuab yeej uas pab khaws cov casing nyob rau hauv qhov chaw thiab ua kom nws nyob rau hauv lub borehole thaum lub sij hawm cov txheej txheem cementing.Centralizersyog cov khoom tseem ceeb ntawm cov cuab yeej ua tiav vim tias lawv xyuas kom meej tias cov cement sib npaug ntawm cov annulus ntawm cov casing thiab cov phab ntsa zoo, tsim kom muaj kev sib raug zoo thiab tiv thaiv cov dej tsiv teb tsaws.
Centralizersmuaj ntau yam designs thiab style, los ntawm hneev caij nplooj ntoos hlav thiabnruj centralizersmus rau cov tshiab, ntau dua versions xws li rotating thiab non-rotating centralizers. Cov cuab yeej no raug xaiv raws li cov xwm txheej zoo thiab cov kev xav tau cementing. Piv txwv li, cov kev txhawb nqa nruj hauv nruab nrab yog tsim rau cov qhov dej ntsug thiab cov qhov dej siab heev nrog kev khoov tsawg, thaumbow caij nplooj ntoos hlav centralizersyog tsim rau cov qhov dej inclined thiab cov qhov dej me me nrog cov kev xav tau ntau dua.
Yog hais tias lub casing tsis txaus concentrated, cov cement yuav tsis sib npaug, uas tuaj yeem ua rau cov cement sheaths hauv zos los yog cov teebmeem channeling. Qhov no tuaj yeem cuam tshuam tsis zoo rau kev ua haujlwm ntawm lub qhov dej thiab, qhov tseem ceeb tshaj, kev nyab xeeb. Ib feem ntawm cov cement sheath tuaj yeem ua rau cov cement ua tsis tau thiab tso cai rau cov dej tsiv teb tsaws chaw, ua rau muaj kev ncaj ncees zoo thiab tsim kom muaj kev phom sij ib puag ncig.
Txhawm rau tiv thaiv cov teeb meem zoo li no, nws yog ib qho tsim nyog los xaiv lub hauv paus kom raug thiab xyuas kom muaj kev txhim kho kom raug. Ib txhiacentralizers, tshwj xeeb tshaj yog cov tshiab rotating thiab tsis-rotating hom, muab ntau dua qhov tseeb qhov chaw thiab qib kev ua tau zoo dua li ib txwm centralizers.
Cov txheej txheem kev teeb tsa kom raug yuav tsum tau ua raws li kom ua tiav qhov siab tshaj plaws ntawm kev sib cuag ntawm lub casing thiab phab ntsa zoo. Los ntawm kev ua raws li cov lus qhia no, lubcentralizerstuaj yeem cement lub qhov dej thiab nruab nrab lub casing zoo kawg nkaus, uas ua rau muaj kev ua haujlwm zoo, tsim tau zoo thiab muaj kev nyab xeeb zoo.
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Post lub sij hawm: May-16-2023
