Verticality Probe

By: GeoLog Pty Ltd  04-Jul-2012
Keywords: Logging, Geophysics, Borehole Survey

The RG verticality probe provides accurate, continuous measurements of borehole inclination and direction. These are output directly as log traces or may be processed further to produce tabular and graphical outputs of borehole position, borehole drift and true vertical depth. Principles of Measurement The probe includes a triaxial magnetometer to deduce the probe bearing relative to magnetic North and three accelerometers to measure inclination. The outputs from the transducers are processed by a downhole microprocessor to give final borehole inclination and azimuth data in real time. The operation of the probe is limited in steel casing or in the presence of magnetic minerals which affect the magnetometer. Under such conditions, only borehole inclination (without directional information) can be logged. The gyroscopic verticality probe should be used in preference to the standard verticality probe in these cases. Features Small diameter for slimhole operations Continuous borehole orientation log Suitable for all borehole inclinations and directions Optional natural-gamma measurement Measurements Borehole inclination Borehole direction Borehole drift True vertical depth

Keywords: Borehole Survey, Geophysics, Logging, Wireline

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