What is it about?
A narrow hole drilled to establish the nature of, sample, test, or monitor soil, bedrock or contained fluids and gases or for abstraction of water or minerals. Borehole drilling has a long history. By at least the Han Dynasty (202 BC–220 AD), the Chinese used deep borehole drilling for mining and other projects. The British sinologist and historian Michael Loewe (Lowe 1959) states that, at that time, borehole sites could reach as deep as 600 m (2000 ft) but it was after the development of petrol and diesel engines that deep boreholes became generally practicable. The borehole drilling system consists of a drill head which powers the operation, a drill string which extends down the borehole, and a drill bit which cuts through the substrate. The drill string may be surrounded by a collar separated from the drill string by an annular space. The annular space allows water or mud to be pumped down and for soil and cuttings to be flushed up to the...
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Why is it important?
The borehole drilling system consists of a drill head which powers the operation, a drill string which extends down the borehole, and a drill bit which cuts through the substrate. The drill string may be surrounded by a collar separated from the drill string by an annular space. The annular space allows water or mud to be pumped down and for soil and cuttings to be flushed up to the...
Perspectives
Writing this article was a great pleasure as it has co-authors with whom I have had long standing collaborations. This article also lead to rare disease groups contacting me and ultimately to a greater involvement in rare disease research.
Dr. Kaveh Ostad-Ali-Askari
American University in Dubai
Read the Original
This page is a summary of: Borehole Investigations, January 2018, Springer Science + Business Media,
DOI: 10.1007/978-3-319-12127-7_32-1.
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