AZIMUTH INITIALIZATION AND CALIBRATION OF WELLBORE SURVEYING GYROSCOPIC AND INERTIAL INSTRUMENTS BY MEANS OF AN EXTERNAL NAVIGATION SYSTEM
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United States of America Patent
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Issued Date -
Sep 27, 2012
app pub date -
Nov 1, 2010
filing date -
Oct 30, 2009
priority date (Note) -
Abandoned
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Abstract
It is described a system and a method for for azimuth initialization of a gyroscopic and/or inertial instrument for wellbore surveying, said system comprising:—a rigid reference structure to which the gyroscopic and /or inertial instrument is rigidly connectable;—an external navigation system for providing an azimuth measurement as a function of time, and wherein the rigid reference structure provides a rigid orientation between the external navigation system and the gyroscopic and/or inertial instrument; —a processor operable to synchronize the azimuth measurement as a function of time with an orientation as a function of time of the gyroscopic and/or inertial instrument.
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