Gyroscopic steering tool using only a two-axis rate...

Details Gyroscopic steering tool using only a two-axis rate... Gyroscopic steering tool using only a two-axis rate...

E - Fixed Constructions

21

B

E21B 47/022 (2006.01) G01C 19/04 (2006.01)

Patent

CA 2476789

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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