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一、概述岩心钻探地层复杂多变、软硬不均,而且工作面在地下不同的深度,看不见、摸不着,因而决定了钻进技术是一个探索性很强的技术,从某种角度看,孔内事故是不能完全避免的。在当前技术水平、探测手段比较落后的情况下,探矿人员的经验是很重要的。孔内事故造成巨大的经济损失:如以全国开动五千台岩心钻机、每年每台平均开动九个台月、孔内事故台时占总台时20％、台月费用平均1.5万元计,每年将因孔内事故损失13500万元。此外,孔内事故消耗大量的能源、钢材,拖延勘探速度,甚至报废进尺。如处理不当还可能造成设备损坏、人员伤亡。孔内事故的种类有卡、夹钻,埋钻,烧钻,跑管,断钻事故。还有套管、孔内掉物、测
First, an overview Core drilling complex stratification, soft and hard uneven, and the work surface in different depth underground, invisible, touching, and thus determine the drilling technology is a highly exploratory technology, from a certain point of view , Hole accident can not be completely avoided. In the current state of technology, exploration means more backward circumstances, prospecting experience is very important. Accidents in the hole caused huge economic losses: starting with 5,000 core drilling rigs throughout the country, each platform started an average of nine months a year, with an accident station within the hole accounting for 20% of the total station time, an average monthly fee of 15,000 yuan per month, Each year will lose 135 million yuan due to hole accidents. In addition, the hole accident consumes a large amount of energy, steel, delay the exploration speed, and even scrapped footage. Improper handling may also result in equipment damage and casualties. Kinds of accidents within the hole card, folder drill, burying, burning drill, running pipe, broken drill accident. There are casing, the hole fall objects, measured