Measurement of curvature of a subsurface borehole, and use of such measurement in directional drilling
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United States of America Patent
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Apr 12, 2005
Grant Date -
Feb 27, 2003
app pub date -
Aug 6, 2002
filing date -
Aug 17, 2001
priority date (Note) -
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Abstract
The present invention provides methods of measuring downhole the curvature of a borehole and, in a particular application of the invention, using the curvature information as an input component of a bias signal for controlling operation of a downhole bias unit in a directional drilling assembly.
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