过去的經驗告訴我們,当鑽粒鑽头鑽进轉速过高时,井底鑽粒由于离心力的作用,不能稳定在鑽头唇面下,影响了鑽进效率,如果能設法保証井底經常具有足够的鑽粒,則縱然鑽头轉速很快,而鑽进效率將会进一步提高。有些勘探队曾大胆地試驗过快速鑽粒鑽头鑽进,起初效率高而后低,这可 The past experience tells us that when the drilling bit drilling speed is too high, the bottom hole due to centrifugal force due to centrifugal force, can not be stable under the drill lip, affecting the drilling efficiency, if we can try to ensure that the bottom of the well often have Enough drilling, even if the bit speed is fast, and drilling efficiency will be further improved. Some exploration teams have boldly tested the fast drill bit drilling, initially high efficiency and then low, which may