DRILLING RIG FOR DRILLING FROM UNDERGROUND TUNNELS
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United States of America Patent
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Issued Date -
Sep 18, 2014
app pub date -
Mar 13, 2014
filing date -
Mar 14, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A rig for drilling a borehole from an underground tunnel includes a base assembly, a drilling assembly mounted to the base assembly, an upper frame assembly mounted to the drilling assembly above the base assembly, and a support hood coupled to the drilling assembly and positioned above the upper frame assembly. The support hood is configured to bear against a ceiling of the tunnel during drilling operations.
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