Dab tsi yog qhov cuam tshuam rau tus nqi nkag mus rau hauv qhov drilling?
Hauv kev lag luam drilling, tus nqi nkag mus (ROP), tseem hu ua tus nqi nkag lossis laum tus nqi, yog qhov nrawm ntawm qhov kev xyaum ua kom tawg lub pob zeb hauv qab nws kom tob rau hauv qhov borehol