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Keywords: outer core bit
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Proceedings Papers
First Field Test of the Dual Core-Bit Tool for Drilling Stress Record Cores at Kamioka Mine, Japan
Available to Purchase
Paper presented at the SPWLA 25th Formation Evaluation Symposium of Japan, September 25–26, 2019
Paper Number: SPWLA-JFES-2019-K
... by the outer core-bit, cut a smaller diameter core by the inner core-bit in a same way as a normal coring. As a result, the shape before expansion remains in the upper part of the core, and the shape should expand due to stress relief in the lower part deeper than the outer groove. According to this concept...
