Method of rotating a tubular member
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United States of America Patent
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-
May 5, 1998
Issued Date -
N/A
app pub date -
Jul 18, 1996
filing date -
Oct 31, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A tool 60 for rotating a tubular member 80 passing through a slip assembly 66 is powered by a rotary table 62 of a drilling rig. Tool 60 includes a cam ring 8 having a plurality of interior camming surfaces 82 thereon, and a cage plate assembly 84 rotatable with respect to the cam ring 8 and housing one or more gripping heads 94 for gripping engagement with the tubular 80. A powered drive unit 55 is provided for selectively rotating the cage plate assembly 84 with respect to the cam ring 8. A tool mount 10 removably connects the slip assembly and the cage plate assembly, and one or more axial adjustment members 17 permit limited axial movement of the cam ring 8 with respect to the slip assembly so that the gripping heads retain gripping engagement with the tubular member 80 while moving axially with respect to the body of the slip assembly.
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Cited Art Landscape
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