Drilling tool
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 11, 1997
Issued Date -
N/A
app pub date -
Sep 11, 1995
filing date -
Jul 13, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hole opener comprising: a cylindrical section of pipe; a nose; a plurality of cutting elements that extend radially from the pipe and that produce a lateral force on the hole opener in response to the rotation of the hole opener in the borehole; lower reaction pad means, extending radially from the pipe section to trail behind the cutting elements and located generally below the cutting elements, for continuously contacting the borehole wall during rotation of the hole opener and for receiving reactive forces that are in response to the lateral force; and upper reaction pad means, extending radially from the pipe section to trail behind the cutting elements and located generally above the cutting elements, for continuously contacting the borehole wall during rotation of the hole opener and for receiving reactive forces that are in response to the lateral force.
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