Lub laum me ntsis yog qhov tseem ceeb ntawm cov khoom siv drilling; Nws lub luag haujlwm tseem ceeb yog txhawm rau pob zeb tawg thiab tsim lub qhov dej zoo. Lub rotary laum me ntsis tam sim no yog hom qauv siv thoob plaws hauv kev lag luam roj av. Tsav los ntawm lub zog siv hluav taws xob, qhov me ntsis tig- yog li tsim cov centripetal motion thoob plaws tag nrho lub rooj sib txoos-thiab, los ntawm kev sib xyaw ntawm kev txiav thiab kev puas tsuaj, ua rau cov pob zeb tawg kom tawg, yog li ua kom yooj yim rau hauv downward drilling.
Raws li ib qho ntawm cov khoom tseem ceeb ntawm cov khoom siv drilling, cov khoom siv tho yuav tsum sib txawv hauv cov ntsiab lus thiab geometry kom haum rau ntau hom kev ua haujlwm thiab geological ib puag ncig. Thaum ua cov roj av drilling, kev xaiv cov khoom siv laum yuav tsum tau mus txog ob qho tib si rationally thiab scientifically, coj los ntawm cov kev ua haujlwm tshwj xeeb thiab cov qauv tsim engineering. Los ntawm kev tshawb fawb xaiv qhov tsim nyog laum cov khoom thiab txiav txim siab qhov drilling kua muaj pes tsawg leeg thaum lub sijhawm ua haujlwm drilling, nws muaj peev xwm ua kom muaj txiaj ntsig zoo thiab ua haujlwm zoo. Txoj hauv kev no ua rau cov roj av drilling kev ua haujlwm kom paub meej lawv cov nqi tsim nyog thiab ua kom muaj txiaj ntsig zoo rau kev nce qib ntawm kev lag luam roj av.
