Core drilling tool
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United States of America Patent
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-
Sep 11, 1990
Grant Date -
N/A
app pub date -
Apr 21, 1989
filing date -
Apr 22, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A core drilling tool for drilling rock in underground soil formations which includes an outside pipe and an inside pipe therein that can be conveyed separately to the surface. The inside pipe includes a core-receiving receptacle at its lower end, and at its upper end is provided with a measurement unit for on-site acquisition, processing and storage of data, such as borehole, core and/or drilling process parameters.
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