Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Brent D. Hope0
Nico Foekema0
Robert A. Estes0
Roger Cruz0
Date of Patent
August 7, 2007
0Patent Application Number
109984940
Date Filed
November 29, 2004
0Patent Primary Examiner
Patent abstract
A nuclear sensor on a bottomhole assembly (BHA) makes measurements of a property of an earth formation during continued rotation of the BHA. Magnetometers that are susceptible to bias error are deployed on the BHA to make measurements of the magnetic toolface angle. A processor separates the sensor measurements into azimuthal sectors while compensating for inherent time delays in the electronics, non-uniform rotation, and bias.
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