Magnetometers for measurement-while-drilling applications

Details Magnetometers for measurement-while-drilling applications Magnetometers for measurement-while-drilling applications

2007-08-07

2007-08-07

Tsay, Frank (Department: 3672)

Wells

Processes

With indicating, testing, measuring or locating

C166S250110, C166S066000

Reexamination Certificate

active

10998494

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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