Rov qab Circulation (RC) drilling yog ib txoj hauv kev siv dav hauv kev tshawb nrhiav ntxhia thiab qib tswj kev drilling, tab sis nws tuaj nrog qee qhov tsis zoo. Nov yog qee qhov ntawm lawv:
Txwv rau Mos mus rau Nruab Nrab-Hard Formations: RC drilling yog qhov zoo tshaj plaws hauv softer rau nruab nrab-nyuaj formations. Tej zaum nws yuav nyuaj heev los yog abrasive formations qhov twg lwm txoj kev drilling, xws li pob zeb diamond drilling los yog Down-The-Hole (DTH) drilling, tej zaum yuav haum dua.
Sample Contamination: Thaum RC drilling yog tsim los txo cov qauv paug, qee qhov kev sib kis tseem tuaj yeem tshwm sim. Cov kua dej drilling siv hauv RC drilling tuaj yeem sib xyaw nrog cov qauv, cuam tshuam rau qhov tseeb ntawm kev tsom xam, tshwj xeeb tshaj yog nyob rau hauv cov ntaub ntawv tshawb fawb.
Cov teeb meem rov qab ua piv txwv: RC drilling tuaj yeem ntsib cov teeb meem hauv kev rov ua kom tiav thiab txuas ntxiv mus kuaj, tshwj xeeb tshaj yog nyob rau hauv xoob lossis tsis sib sau ua ke. Cov kua dej drilling qee zaum tuaj yeem ntxuav cov khoom zoo, ua rau cov qauv tsis tiav.
Limited Core Diameter: RC drilling ua cov chips lossis txiav, tsis yog cov tub ntxhais muaj zog. Qhov no tuaj yeem yog qhov txwv yog tias tus qauv loj-inch core yuav tsum tau ua kom ntxaws txog geological tsom xam. Piv txwv li, pob zeb diamond drilling, muab cov qauv tseem ceeb uas tso cai rau kev kuaj xyuas ntau dua ntawm pob zeb.
Kev txwv qhov tob: RC drilling tuaj yeem ua haujlwm tsawg dua ntawm qhov tob tob tob piv rau lwm txoj hauv kev. Raws li qhov tob nce, qhov ua tau zoo ntawm kev rov qab tuaj yeem txo qis, ua rau nws tsis tshua muaj txiaj ntsig rau kev tshawb nrhiav tob tob.
Cov cuab yeej siv thiab teeb tsa tsis yooj yim: Kev teeb tsa thiab ua haujlwm RC cov cuab yeej drilling tuaj yeem ua haujlwm ntau dua thiab siv sijhawm ntau dua piv rau lwm txoj hauv kev drilling. Kev txhim kho thiab kev saib xyuas cov cuab yeej yog qhov tseem ceeb rau kev ua haujlwm zoo thiab raug drilling.
