Hollow-stem Auger Drilling Process
Once the drill reaches sampling depth, the drilling crew can remove the rods and insert one of several sampling devices—CME’s Continuous Core Sampling System, heavy-duty split spoon sampling, Shelby tubes and California barrels (standard and modified). The drilling rig drives the coring device into the sediment to obtain an undisturbed sample below the auger bit.
The work crew records each sample in the drilling log and takes them back to the laboratory for testing.
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