The probe includes a triaxial magnetometer to determine the bearing of a reference in the probe 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.
Diameter: 42mm
Length: 1.66m
Weight: 5.5kg
Temperature: 0-700C (extended ranges available)
Max. pressure: 20MPa
Inclination range: Horizontal +/- 90 degree
Azimuth range: 0 to 360
Minerals / Water / Engineering
-Bed-thickness estimation
-Surveying and deviation checks
-True seam depth
Borehole type: open/plastic-cased, water/air-filled
Centralisation: non-magnetic centralisers required
Recommended Logging Speed: 4m/min
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 Gyro probe should be used in preference to the standard verticality probe in such cases.
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