Caliper Tools
Precision Borehole Diameter Measurement
The Caliper Tools are essential instruments for measuring the mean diameter of boreholes. They play a crucial role in assessing borehole integrity, identifying zones of washout, breakout, or fissures in unlined boreholes, and checking the condition of borehole linings.
For narrower boreholes with diameters under 400mm, the 2-arm and 3-arm calipers provide greater resolution and precision compared to the 4-arm caliper, which is suited for larger boreholes.
Key Features
Specifications
| Model | 2 or 3 Arm Caliper | 4 Arm Caliper |
|---|---|---|
| Tool Size | 1150mm x 38mm | 1180mm x 80mm |
| Tool Weight | 6kg | 18kg |
| Measurement Range | 50–600mm | 100–1500mm |
| Max Temperature | 80°C | 80°C |
| Max Pressure | 20MPa | 20MPa |
Logging Conditions
- Logging Speed: 2–9 m/min (free running)
Borehole Compatibility
- Environment: Dry or fluid-filled boreholes
- Lining: Suitable for unlined or lined boreholes
The Caliper Tools are indispensable for borehole diameter measurements, offering reliable data for geological, geotechnical, and environmental applications. Whether you require precision for narrow boreholes or versatility for larger projects, these tools ensure accurate and efficient results.
Related Tools
Acoustic Imager (Televiewer) Tool
Captures borehole wall images using acoustic signals transmitted and received by a rotating ultrasonic sensor.
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