Feem ntau cov roj shales tau pom nyob rau hauv cov npoo dav ntau pua lossis ntau txhiab tus metres hauv qab saum npoo. Cov nqaws no tuaj yeem nkag mus los ntawm cov pa sib dhos kom zoo, tab sis cov qauv tsim nyog tshaj plaws feem ntau yog qhov chaw rov tav. Hauv cov txheej txheem no ib lub qhov dej yog pib nyob rau hauv ib txwm txoj kev, nrog rau kev sim ntawm ib lub qhov tsav ntau dua li qee 6 rau 15 ko taw) sib sib zog nqus. Qhov no yog txoj hlua khi nrog cov yeeb nkab steel ib co 40 mus rau 20 cm (16 rau 20 ntiv tes) hauv lub cheeb, hu ua tus neeg saib xyuas ua, uas tau cem cia. Los ntawm muaj lub borehole yog dreered ncaj, dhau los ntawm ntau cov txheej pob zeb uas yuav suav nrog cov dej tsis huv lossis dej hauv nroog. Ntu no ntawm Borehole yog txoj hlua nrog cov cemented steel yeeb nkab hu ua caseing. Nyob ntawm kev siv ntau lawm lossis ib puag ncig cov yeeb yaj kiab, lwm cov yeeb yaj kiab, hu ua ib nrab ntawm casing, tej zaum yuav cemented sab hauv qhov chaw casented.
Ntawm lub sijhawm ua ntej "Kickoff tau taw tes" (hauv qee kis ntawm Shale tsim, hauv lwm cov xwm txheej tsis pub dhau nws), lub borehole yog tig mus rau kab rov tav. Los ntawm muaj kev drilling txuas ntxiv nyob rau hauv shale, qee zaum rau lwm txhiab meters lossis ntau dua. Thaum seem tom qab ntawm lub qhov dej yog drilling, tag nrho cov borehole yog lined nrog lwm cov yeeb nkab hu ua cov khoom siv ntau lawm. Nyob rau hauv ntau txoj haujlwm ntau dua ib qho zoo tuaj yeem tau drilling los ntawm ib lub vev xaib (lossis "ncoo"), lossis ntau dua ib qho chaw tom qab tuaj yeem ua rau ib qho borehole.
