Using significant technological breakthroughs and unconventional approaches, the goal of the in situ probing of glacier ice for a better understanding of the orbital response of climate (SUBGLACIOR) project is to advance ice core research by inventing, constructing and testing an in situ probe to evaluate if a target site is suitable for recovering ice as old as 1.5 million years. Embedding a laser spectrometer, the probe is intended to make its own way down into the ice and to measure, in real time and down to the bedrock, the depth profiles of the ice δD water isotopes as well as the trapped CH4 gas concentration and dust concentration. The probe descent is achieved through electromechanical drilling combined with continuous meltwater sample production using a central melting finger in the drill head. A key aspect of the project lies in the design and implementation of an efficient method to continuously transfer to the surface the ice chips being produced by the drill head and from the refreezed water expulsed downstream from the melting finger, into the borehole. This paper presents a detailed calculation and analysis of the flow rates and pressure conditions required to overcome friction losses of the drilling fluid and to effectively transport ice chips to the surface.

中文翻译：

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SUBGLACIOR 钻探探头：液压考虑

利用重大技术突破和非常规方法，冰川冰原位探测以更好地了解气候轨道响应 (SUBGLACIOR) 项目的目标是通过发明、建造和测试原位探测器来评估冰芯研究如果目标地点适合回收 150 万年前的冰。该探测器嵌入了激光光谱仪，旨在自行进入冰层，并实时测量冰层的深度剖面，直至基岩δD水同位素以及捕获的 CH4气体浓度和粉尘浓度。探头下降是通过机电钻孔结合使用钻头中的中心熔化指连续生产融水样品来实现的。该项目的一个关键方面在于设计和实施一种有效的方法，以将钻头产生的冰屑和从熔化指下游排出的再冷冻水连续转移到地表，进入钻孔。本文详细计算和分析了克服钻井液摩擦损失和有效地将冰屑输送到地面所需的流速和压力条件。