Gyroscopic steering tool using only a two-axis rate gyroscope and deriving the missing third axis
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United States of America Patent
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Oct 12, 2010
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N/A
app pub date -
Apr 12, 2007
filing date -
Aug 7, 2003
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Abstract
A two-axis gyroscope used on a bottom hole assembly can be used for determining a rate of rotation about the rotational axis of a BHA. The method takes advantage of possible misalignment of at least one axis of the two axis gyroscope from orthogonality with respect to the rotational axis of the BHA, resulting in the misaligned gyro being sensitive to BHA rotation.
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Cited Art Landscape
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