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近两年来,各单位在提高鑽探效率問题上积累了很多好的經驗,其主要的应該算是“两大一快”“无岩心鑽进”和“广泛应用小口徑鑽具”“推行新型切削具”了。其中对“无岩心鑽进”“新型切削具的应用”两項新技术,在有些地区,由于地質条件和勘探設計要求不同,尚不能普遍推广以外,此較具有全面应用基础的则要算是“两大一快”和小口徑鑽进的两項經驗了。本文拟就在鑽探上如何正确的对待小口徑鑽进的经驗和有关问题做一些粗淺探討。一、提高鑽进效率的原因分析用小口径鑽进(指75/91公厘鑽具)較之大口徑(110/130公厘)鑽具鑽进,在岩石可鑽性相同,压力、水量、立軸转数等条件都相适应情況下,能够提
In the past two years, all units have accumulated a great deal of good experience in improving drilling efficiency. The major ones should be “Two Big One Fast,” “Coreless Drilling,” and “Wider Use of Small-Diameter Drilling Tools.” With “the. Among them, the two new technologies of ”non-core drilling“ and ”new cutting tool application“ are still not universally popularized in some areas due to different geological conditions and exploration design requirements, which are more than ” Two big and one fast "and two small-diameter drilling experience. This article intends to do some superficial discussions on how to correctly handle the experience of small diameter drilling and related problems in drilling. First, the analysis of the reasons for improving drilling efficiency Small diameter drilling (referring to 75/91 mm drill) than the large diameter (110/130 mm) drilling, rock drillability in the same, the pressure, water , Vertical axis rotation speed and other conditions are appropriate to mention