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Drilling side holes from a boreholeMachine takes long horizontal stratum samples from confines of 21 cm bore hole. Stacked interlocking half cylindrical shells mate to form rigid thrust tube. Drive shaft and core storage device is flexible and retractable. Entire machine fits in 10 meter length of steel tube. Machine could drill drainage or ventilation holes in coal mines, or provide important information for geological, oil, and geothermal surveys.
Document ID
19800000066
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Collins, E. R., Jr.
(Caltech)
Date Acquired
August 10, 2013
Publication Date
August 1, 1980
Publication Information
Publication: NASA Tech Briefs
Volume: 5
Issue: 1
ISSN: 0145-319X
Subject Category
Materials
Report/Patent Number
NPO-14465
Accession Number
80B10066
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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