Magnetometers for measurement-while-drilling applications

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

G - Physics

01

V

G01V 3/38 (2006.01)

Patent

CA 2548529

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.

L'invention concerne un capteur nucléaire placé sur un ensemble de fond de puits (BHA), servant à mesurer une propriété d'une formation terrestre pendant une rotation continue du BHA. Des magnétomètres susceptibles d'erreurs de justesse sont déployés sur le BHA pour effectuer des mesures de l'angle de face de coupe magnétique. Un processeur sépare les mesures de capteur en secteurs azimutaux, tout en compensant les retards inhérents des dispositifs électroniques, les rotations non uniformes et les déviations.

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