The Deviation Probe DevProbe1 is used to measure the borehole deviation. A three-axis magnetometer measures the azimuthal direction of the borehole and a dual tilt sensor provides information about the inclination. The probe is sealed and temperature compensated. Borehole deviation is required to determine the precise XYZ location of a seismic source or geophone inside a borehole. A software is provided to visualize and store the deviation data.
Technical Details
| Operational depth: | Up to 150 m |
| Probe length: | 1235 mm |
| Probe diameter: | 40 mm |
| Probe weight: | 3.45 kg |
| Cable weight per metre: | 62 g |
| Cable strength: | 1700 N |
| Borehole diameter: | 50 mm |
| Azimuth range: | 0 – 360° |
| Azimuth resolution: | 12 bit (<0.5°) |
| Tilt range: | 0 – 70° (linear corrected) |
| Tilt resolution: | 12 bit (<0.2°) |
| Temperature range: | -30 to -85°C |
| Depth indicator: | Cable marker every 1 m |
| Storage: | On drum |
Manufactured by Geotomographie GmbH
Technical Details
Generated wave types: SV
Signal frequencies: Up to 500 Hz (depending on geology and borehole distance)
Operational depth: Up to 100 m
Source length: 1015 mm
Source weight: 6 kg
Cable weight per metre: 377 g
Borehole diameter: 75-100 mm (or larger if spacers are used)
Clamping system: Infatable bladder
Depth indicator: Cable marking every 2 m
Connector: To impulse generator IPG800 or IPG5000
Storage: On drum
Switch box: Switch between two vertical shot directions
