Well tool for use with down-hole drilling apparatus
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United States of America Patent
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-
Jul 23, 1991
Issued Date -
N/A
app pub date -
Feb 29, 1988
filing date -
May 16, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A well tool for use in a down-hole drilling assembly wherein the drill bit is rotated without drill pipe rotation comprising a generally tubular body and a plurality of roller assemblies secured to the body, the roller assemblies including rollers which rotate around axes generally transverse to an axis passing lengthwise through the body of the well tool.
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Cited Art Landscape
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