Method for determining the azimuth of a borehole

Details Method for determining the azimuth of a borehole Method for determining the azimuth of a borehole

E - Fixed Constructions

21

B

33/92

E21B 47/022 (2006.01)

Patent

CA 1259187

A B S T R A C T METHOD FOR DETERMINING THE AZIMUTH OF A BOREHOLE The influence of drill string magnetization on an azimuth measurement in a borehole by means of a magnetometer package included in a drill string having a longitudinal axis is eliminated by first eliminating the influence of the cross axial components of the drill string magnetization through magnetometer readings at various angular orientations of the drill string, and then eliminating the influence of the axial component of the drill string magnetization.

501708

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