SECTEURS
GEOTECHNICS
New ! 6G is arriving
New ! 6G is arriving
NOS CLIENTS
4AC60 : Four-arm caliper probe
The 4AC60 borehole geometry probe incorporates two pairs of caliper arms giving independent, perpendicular X-Y diameter measurements, while a magnetometer/accelerometer orientation system provides the borehole azimuth, inclination and X-Y arm directions.
In a non-circular borehole, because of differing spring tensions in the two pairs of arms, the tool will rotate in the borehole until the X-Y directions coincide with the maximum and minimum diameter axes.
Where a borehole becomes ovalised or develops breakout-type features, it can provide information on stress magnitudes and directions within the geological formations.
As an option, the probe can be supplied with a natural gamma detector to provide additional lithological information or for horizon correlation purposes.
Contact us to get a quote or request more information.
![4AC probe](https://static.wixstatic.com/media/398094_514a671777864b6d8925fbf3cf54b4a5~mv2.jpg/v1/fill/w_295,h_575,al_c,q_80,usm_0.66_1.00_0.01,enc_auto/Image%20sonde%204AC.jpg)
4AC60 SPECIFICATIONS
![Screenshot](https://static.wixstatic.com/media/cadca1_9e0ae29355e4488ba85b11849dc22b3e~mv2.png/v1/fill/w_74,h_86,al_c,q_85,usm_0.66_1.00_0.01,blur_3,enc_auto/Capture%20d%E2%80%99e%CC%81cran%202020-11-02%20a%CC%80%2014_27_41_.png)
Technical specifications
✓ Diameter : 60 mm
✓ Length : 3100 mm
✓ Weight : 18 kg
✓ Max. temperature. : 70°C
✓ max. Pressure: 200 bar
✓ Power: 70 to 100 Vdc
![Screenshot](https://static.wixstatic.com/media/cadca1_9e0ae29355e4488ba85b11849dc22b3e~mv2.png/v1/fill/w_74,h_86,al_c,q_85,usm_0.66_1.00_0.01,blur_3,enc_auto/Capture%20d%E2%80%99e%CC%81cran%202020-11-02%20a%CC%80%2014_27_41_.png)
Data / sensor parameters
✓ Diameter range: 60 to 450 mm
✓ Diameter resolution: 0.1 mm
✓ Orientation sensor: triple magnetometers : accelerometers
✓ Measurement range: Full 360°inclin./ azimuth
✓ Orientation precision : +/- 0,1° inclination, +/-0,5° azimuth
![Screenshot](https://static.wixstatic.com/media/cadca1_9e0ae29355e4488ba85b11849dc22b3e~mv2.png/v1/fill/w_74,h_86,al_c,q_85,usm_0.66_1.00_0.01,blur_3,enc_auto/Capture%20d%E2%80%99e%CC%81cran%202020-11-02%20a%CC%80%2014_27_41_.png)
Accessories & options
✓ Natural Gamma detector: ø25x50 mm NaI(Tl) crystal
✓ Non magnetic centralisers
✓ Calibration Jig
![Screenshot](https://static.wixstatic.com/media/cadca1_9e0ae29355e4488ba85b11849dc22b3e~mv2.png/v1/fill/w_74,h_86,al_c,q_85,usm_0.66_1.00_0.01,blur_3,enc_auto/Capture%20d%E2%80%99e%CC%81cran%202020-11-02%20a%CC%80%2014_27_41_.png)
Borehole
conditions
✓ Dry or fluid-filled borehole
✓ Open hole or PVC casing if azimuth required
✓ Steel casing if azimuth not required