Portable top drive
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United States of America Patent
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-
Feb 15, 2000
Issued Date -
N/A
app pub date -
Apr 15, 1997
filing date -
Sep 13, 1994
priority date (Note) -
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status (Latency Note)
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Abstract
A portable top drive drilling unit that is a self-contained assembly of components adapted for quick installation in a drilling rig and which requires a minimum of modification to the rig structure.
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