Drilling rig
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United States of America Patent
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-
Oct 12, 1993
Issued Date -
N/A
app pub date -
Mar 31, 1992
filing date -
Feb 6, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention discloses structures which enable the construction or conversion of drilling rigs in which the rotary table and kelly are replaced by a top drive rotating mechanism. Furthermore, torque guide is provided to control lateral movement of the top drive and resist reactionary rotational forces induced by the top drive, without applying additional forces to the mast of the rig.
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Family
International Classification(s)
Cited Art Landscape
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