1972•OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information)Requires access
Versatile diamond core drilling technique
W. Seyferle
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Abstract
The Craelius drilling technique is discussed, which uses a lightweight rotary drilling apparatus with small diameter drill pipe and a diamond core bit. It is used primarily for exploratory drilling in shallow aquifers in consolidated formations, where it is important for planning purposes to obtain full core recovery. The equipment and the standardized casing and drill pipe sizes are presented.