鑽粒尅原理问题,至今還沒有一個完整而統一的論點。許多鑽探工作者對該問題的認識尚處在爭論之中。我國的鑽探工作者們對這一問題大體上有三種不同的論點。第一種是認為以圓整鑽粒尅取岩石的作用為最大。其理由是認為圓整鑽粒與孔底岩石的接觸面很小,僅為一點,在受鑽頭底面的壓力和廻轉力同時作用下,圓整鑽粒對孔底產生一種滾壓作用,借以破碎岩石,保持鑽進。第二種是認為以破碎鑽粒尅取岩石的作用為最大。其理由是破裂瓚粒本身具有依多 Drilling g principle, so far there is no complete and unified argument. Many drilling workers are still debating this issue. Drilling workers in our country generally have three different arguments on this issue. The first is that the round diamond to take the role of the largest rock. The reason is that the round diamond and the bottom of the rock interface is very small, only a little bit by the bottom surface of the drill bit under the pressure and force at the same time, the round hole on the bottom of a rolling effect, by which Broken rocks, keep drilling. The second is that the role of broken rocks to take rocks for maximum. The reason is that broken tablets themselves have more