Non-contact measurement system for hot water drilled ice boreholes

IF 2.5 4区地球科学 Q2 GEOGRAPHY, PHYSICAL

Annals of Glaciology Pub Date : 2021-01-21 DOI:10.1017/aog.2020.85

Carson W. I. McAfee, Julius Rix, S. Quirk, P. Anker, A. Brisbourne, Keith Makinson

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引用次数: 1

Abstract

Abstract A programmable borehole measurement system was deployed in hot water drilled ice holes during the ‘Bed Access and Monitoring of Ice Sheet History’ (BEAMISH) project to drill to the bed of the Rutford Ice Stream in West Antarctica. This system operates autonomously (no live data) after deployment, and records borehole diameter (non-contact measurement), water column pressure, heading and inclination. Three cameras, two sideways looking and one vertical, are also included for visual inspection of hole integrity and sediments. The system is small, lightweight (~35.5 kg) and low power using only 6 ‘D’ cell sized lithium batteries, making it ideal for transport and use in remote field sites. The system is 2.81 m long and 165 mm in diameter, and can be deployed attached to the drill hose for measurements during drilling or on its own deployment line afterwards. The full system is discussed in detail, highlighting design strengths and weaknesses. Data from the BEAMISH project are also presented in the form of camera images showing hole integrity, and sensor data used to calculate borehole diameter through the full length of the hole. These data are used to show confidence in hole verticality and subsurface cavity development and connection.

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热水钻孔冰孔非接触式测量系统

摘要:在南极西部Rutford冰流床上钻探的BEAMISH (Bed Access and Monitoring of ice Sheet History)项目中，在热水钻孔冰孔中部署了可编程钻孔测量系统。该系统在部署后自动运行(无实时数据)，并记录井径(非接触式测量)、水柱压力、井向和倾角。三个摄像头，两个侧视和一个垂直，还包括目视检查孔完整性和沉积物。该系统体积小，重量轻(约35.5 kg)，功耗低，仅使用6 ' D '电池大小的锂电池，非常适合运输和在偏远地区使用。该系统长2.81米，直径165毫米，可以在钻井过程中连接到钻井软管进行测量，也可以在钻井后连接到自己的部署管线上进行测量。对整个系统进行了详细的讨论，突出了设计的优缺点。BEAMISH项目的数据还以显示井眼完整性的相机图像和用于计算整个井眼直径的传感器数据的形式呈现。这些数据用于显示井眼垂直度和地下空腔发育和连接的可信度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Annals of Glaciology GEOGRAPHY, PHYSICAL-GEOSCIENCES, MULTIDISCIPLINARY

CiteScore

8.20

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Annals of Glaciology publishes original scientific articles and letters in selected aspects of glaciology-the study of ice. Each issue of the Annals is thematic, focussing on a specific subject. The Council of the International Glaciological Society welcomes proposals for thematic issues from the glaciological community. Once a theme is approved, the Council appoints an Associate Chief Editor and a team of Scientific Editors to handle the submission, peer review and publication of papers.