Method and apparatus for determining logging tool displacements

Details Method and apparatus for determining logging tool displacements Method and apparatus for determining logging tool displacements

E - Fixed Constructions

21

B

E21B 47/09 (2006.01) E21B 47/02 (2006.01) E21B 47/022 (2006.01) G01C 21/16 (2006.01)

Patent

CA 2313282

A method of determining the displacements of a logging tool during a measurement interval of the logging tool in a borehole includes obtaining a set of accelerometer signals corresponding to accelerations of the logging tool along each of three orthogonal axes of the logging tool during the measurement interval. The method further includes calculating a lower bound for the displacements of the logging tool during the measurement interval when the initial velocity and the gravitational acceleration are unknown. The lower bound on the displacements of the logging tool is used to flag the validity of the measurements made by the logging tool.

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