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鑽粒鑽进剋取原理問題在“地質与勘探”上已討論很久了。我認为这一問題的討論,对今后指导生产有着积极的作用。現將个人对这一問題粗淺見解写出,作为个人对这一問題的学习心得。一、鑽粒投入井底后的变化过程在研究鑽粒鑽进剋取原理問題时,首先应考察一下鑽粒投入井底以后的变化过程,实际上也是鑽粒在鑽头迴轉,軸心压力和冲洗液等因素的参助下对岩石剋取的过程。以一次投砂为例:无論一次进尺多少,投砂数量多少,在囘次进尺終了时,井底往往尚存有圆整鑽粒10～20％(以一次投入数量計算)。这是为了保
Drilling Particle Drilling Principles The problem has been discussed for a long time in “Geology and Exploration”. I think the discussion on this issue will play a positive role in guiding the production in the future. Now, my personal opinions on this issue are sketched out as my personal learning experience on this issue. First, after the drill bit into the bottom of the change process In the study of drill bit to get rid of the principle of the problem, we should first look at the drill bit into the bottom of the hole after the change process, in fact, drilling bit in the drill rotation, axial pressure And rinse fluid and other factors with the help of the process of rock removal. A case of sand cast for an example: no matter how much a footage, the number of sand cast, back to the end of the footage, the bottom of the well often there are still round diamond 10 ~ 20% (in a number of inputs). This is to protect