Method for directional drilling
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United States of America Patent
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Aug 17, 1999
Grant Date -
N/A
app pub date -
Mar 25, 1997
filing date -
Mar 30, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a method for directional drilling with the aid of a drilling device having a drill pipe and a mining tool which moves on an orbit, the tool moves at an essentially constant angular velocity during straight drilling and the angular velocity is periodically changed during curved drilling, in order to thus create a smooth transition from straight drilling to curved drilling and to achieve more precise curve control.
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