NASA NTRS · 19800002464
Borehole geological assessment
Abstract
A method and apparatus are discussed for performing geological assessments of a formation located along a borehole, and a boring tool that bores a pair of holes into the walls of the borehole and into the surrounding strata along with a pair of probes which are installed in the holes. One of the probes applies an input such as a current or pressured fluid, and the other probe senses a corresponding input which it receives from the strata.
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Spuck, W. H., III. 1979-09-11. Borehole geological assessment. https://ntrs.nasa.gov/citations/19800002464
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