A new, modified version of the cable-suspended Ice and Bedrock Electromechanical Drill (IBED) was designed for drilling in firn, ice, debris-rich ice and rock. The upper part of the drill is almost the same for all drill variants and comprises four sections: cable termination, a slip-ring section, an antitorque system and an electronic pressure chamber. The lower part of the IBED comprises an auger core barrel, reamers, a core barrel for ice/debris-ice drilling and a conventional geological single-tube core barrel or custom-made double-tube core barrel. First, the short and full-scale field versions of the IBED were tested at an outdoor testing stand and a testing facility with a 12.5 m-deep ice well. Then, in the 2018–2019 summer season, the IBED was tested in the field at a site ~12 km south of Zhongshan Station, East Antarctica, and a ~6 cm bedrock core was recovered from a 198 m-deep borehole. A total of 18 d was required to penetrate the ice sheet. The retrieved core samples of blue ice, basal ice and bedrock provided valuable information regarding the Earth's paleo-environment.

中文翻译：

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南极冰下钻机：第二部分。冰和基岩机电钻机 (IBED)

一种新的改进版本的电缆悬挂冰和基岩机电钻机 (IBED) 设计用于在冰、冰、富含碎屑的冰和岩石中钻孔。钻头的上部几乎与所有钻头型号相同，包括四个部分：电缆终端、滑环部分、抗扭矩系统和电子压力室。IBED下部包括螺旋钻取芯筒、扩孔器、冰/碎冰钻取取芯筒和常规地质单管取芯筒或定制双管取芯筒。首先，IBED 的短版和全尺寸现场版本在室外测试台和具有 12.5 米深冰井的测试设施中进行了测试。然后，在 2018-2019 年夏季，IBED 在东南极洲中山站以南约 12 公里的地点进行了现场测试，从 198 米深的钻孔中回收了约 6 厘米的基岩岩心。穿透冰盖总共需要 18 天。回收的蓝冰、基底冰和基岩的核心样本提供了有关地球古环境的宝贵信息。