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(in a core drill) a length of pipe for holding rock cores while they are being extracted from the drill hole.
Based on the Random House Dictionary, © Random House, Inc. 2014.
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The vertical plates are bolted to the edges of horizontal former plates that are bolted to the inside surface of the
If the bit becomes plugged or blocking off is suspected, the driller should stop drilling and pull the
Closeup of the sample-freezing drive shoe and a core in a polycarbonate plastic liner removed from the
extending beyond the bit, the system was designed to collect the core into the
The geotechnical samples were to be collected in situ by using lexan liners within the
can generally advance from five to twenty feet at one time, depending on the length of the
In fact, the
was already in the bottom before the core was deployed.
Rock shall be cored using an outer and inner
The sample-freezing drive shoe of the
is in the foreground.
The device is then returned to the ship's deck, where the sediment core is removed from the
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